diff --git a/src/Cargo.lock b/src/Cargo.lock
index e9a20a7c79ca7..c77be5154d3db 100644
--- a/src/Cargo.lock
+++ b/src/Cargo.lock
@@ -1,10 +1,6 @@
 [root]
-name = "unwind"
-version = "0.0.0"
-dependencies = [
- "core 0.0.0",
- "libc 0.0.0",
-]
+name = "workspace_symbol"
+version = "0.1.0"
 
 [[package]]
 name = "advapi32-sys"
@@ -46,8 +42,8 @@ dependencies = [
  "alloc 0.0.0",
  "alloc_system 0.0.0",
  "build_helper 0.1.0",
+ "cc 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "core 0.0.0",
- "gcc 0.3.54 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.0.0",
 ]
 
@@ -80,31 +76,31 @@ version = "0.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.30 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.31 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "backtrace"
-version = "0.3.2"
+version = "0.3.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "backtrace-sys 0.1.12 (registry+https://github.com/rust-lang/crates.io-index)",
+ "backtrace-sys 0.1.14 (registry+https://github.com/rust-lang/crates.io-index)",
  "cfg-if 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "dbghelp-sys 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.30 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.31 (registry+https://github.com/rust-lang/crates.io-index)",
  "rustc-demangle 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "backtrace-sys"
-version = "0.1.12"
+version = "0.1.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "gcc 0.3.54 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.30 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cc 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.31 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -140,16 +136,16 @@ name = "bootstrap"
 version = "0.0.0"
 dependencies = [
  "build_helper 0.1.0",
- "cmake 0.1.25 (registry+https://github.com/rust-lang/crates.io-index)",
- "filetime 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
- "gcc 0.3.54 (registry+https://github.com/rust-lang/crates.io-index)",
- "getopts 0.2.14 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cc 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cmake 0.1.26 (registry+https://github.com/rust-lang/crates.io-index)",
+ "filetime 0.1.12 (registry+https://github.com/rust-lang/crates.io-index)",
+ "getopts 0.2.15 (registry+https://github.com/rust-lang/crates.io-index)",
  "lazy_static 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.30 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.31 (registry+https://github.com/rust-lang/crates.io-index)",
  "num_cpus 1.6.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde 1.0.11 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_derive 1.0.11 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_json 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde 1.0.15 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_derive 1.0.15 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "toml 0.4.5 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -166,8 +162,8 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 name = "build-manifest"
 version = "0.1.0"
 dependencies = [
- "serde 1.0.11 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_derive 1.0.11 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde 1.0.15 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_derive 1.0.15 (registry+https://github.com/rust-lang/crates.io-index)",
  "toml 0.4.5 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -175,7 +171,7 @@ dependencies = [
 name = "build_helper"
 version = "0.1.0"
 dependencies = [
- "filetime 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
+ "filetime 0.1.12 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -193,8 +189,8 @@ dependencies = [
  "docopt 0.8.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "env_logger 0.4.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "error-chain 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "filetime 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
- "flate2 0.2.19 (registry+https://github.com/rust-lang/crates.io-index)",
+ "filetime 0.1.12 (registry+https://github.com/rust-lang/crates.io-index)",
+ "flate2 0.2.20 (registry+https://github.com/rust-lang/crates.io-index)",
  "fs2 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "git2 0.6.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "git2-curl 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -205,20 +201,20 @@ dependencies = [
  "ignore 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "jobserver 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.30 (registry+https://github.com/rust-lang/crates.io-index)",
- "libgit2-sys 0.6.14 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.31 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libgit2-sys 0.6.15 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "miow 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "num_cpus 1.6.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "openssl 0.9.17 (registry+https://github.com/rust-lang/crates.io-index)",
+ "openssl 0.9.19 (registry+https://github.com/rust-lang/crates.io-index)",
  "psapi-sys 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "same-file 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "scoped-tls 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "semver 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde 1.0.11 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_derive 1.0.11 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde 1.0.15 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_derive 1.0.15 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_ignored 0.0.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_json 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "shell-escape 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "tar 0.4.13 (registry+https://github.com/rust-lang/crates.io-index)",
  "tempdir 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -233,13 +229,13 @@ name = "cargotest"
 version = "0.1.0"
 dependencies = [
  "cargo 0.23.0",
- "filetime 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
- "flate2 0.2.19 (registry+https://github.com/rust-lang/crates.io-index)",
+ "filetime 0.1.12 (registry+https://github.com/rust-lang/crates.io-index)",
+ "flate2 0.2.20 (registry+https://github.com/rust-lang/crates.io-index)",
  "git2 0.6.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "hamcrest 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "hex 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_json 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "tar 0.4.13 (registry+https://github.com/rust-lang/crates.io-index)",
  "url 1.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -248,6 +244,11 @@ dependencies = [
 name = "cargotest2"
 version = "0.1.0"
 
+[[package]]
+name = "cc"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "cfg-if"
 version = "0.1.2"
@@ -255,7 +256,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "clap"
-version = "2.26.0"
+version = "2.26.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "ansi_term 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -263,8 +264,7 @@ dependencies = [
  "bitflags 0.9.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "strsim 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "term_size 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "textwrap 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "unicode-segmentation 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "textwrap 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "unicode-width 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "vec_map 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "yaml-rust 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -272,10 +272,10 @@ dependencies = [
 
 [[package]]
 name = "cmake"
-version = "0.1.25"
+version = "0.1.26"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "gcc 0.3.54 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cc 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -300,9 +300,9 @@ version = "0.0.0"
 dependencies = [
  "diff 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
  "env_logger 0.4.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "filetime 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
- "getopts 0.2.14 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.30 (registry+https://github.com/rust-lang/crates.io-index)",
+ "filetime 0.1.12 (registry+https://github.com/rust-lang/crates.io-index)",
+ "getopts 0.2.15 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.31 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "rustc-serialize 0.3.24 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -332,7 +332,7 @@ version = "0.4.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "core-foundation-sys 0.4.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.30 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.31 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -340,7 +340,7 @@ name = "core-foundation-sys"
 version = "0.4.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "libc 0.2.30 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.31 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -349,9 +349,9 @@ version = "0.12.0"
 dependencies = [
  "curl 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "error-chain 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde 1.0.11 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_derive 1.0.11 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_json 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde 1.0.15 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_derive 1.0.15 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "url 1.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -394,23 +394,23 @@ name = "curl"
 version = "0.4.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "curl-sys 0.3.14 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.30 (registry+https://github.com/rust-lang/crates.io-index)",
+ "curl-sys 0.3.15 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.31 (registry+https://github.com/rust-lang/crates.io-index)",
  "openssl-probe 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "openssl-sys 0.9.17 (registry+https://github.com/rust-lang/crates.io-index)",
- "socket2 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "openssl-sys 0.9.19 (registry+https://github.com/rust-lang/crates.io-index)",
+ "socket2 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "curl-sys"
-version = "0.3.14"
+version = "0.3.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "gcc 0.3.54 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.30 (registry+https://github.com/rust-lang/crates.io-index)",
- "libz-sys 1.0.16 (registry+https://github.com/rust-lang/crates.io-index)",
- "openssl-sys 0.9.17 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cc 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.31 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libz-sys 1.0.17 (registry+https://github.com/rust-lang/crates.io-index)",
+ "openssl-sys 0.9.19 (registry+https://github.com/rust-lang/crates.io-index)",
  "pkg-config 0.3.9 (registry+https://github.com/rust-lang/crates.io-index)",
  "vcpkg 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -459,8 +459,8 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "lazy_static 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "regex 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde 1.0.11 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_derive 1.0.11 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde 1.0.15 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_derive 1.0.15 (registry+https://github.com/rust-lang/crates.io-index)",
  "strsim 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -500,7 +500,7 @@ name = "error-chain"
 version = "0.10.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "backtrace 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "backtrace 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -508,7 +508,7 @@ name = "error-chain"
 version = "0.11.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "backtrace 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "backtrace 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -520,10 +520,11 @@ dependencies = [
 
 [[package]]
 name = "filetime"
-version = "0.1.10"
+version = "0.1.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "libc 0.2.30 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.31 (registry+https://github.com/rust-lang/crates.io-index)",
+ "redox_syscall 0.1.31 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -540,11 +541,11 @@ version = "0.1.0"
 
 [[package]]
 name = "flate2"
-version = "0.2.19"
+version = "0.2.20"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "libc 0.2.30 (registry+https://github.com/rust-lang/crates.io-index)",
- "miniz-sys 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.31 (registry+https://github.com/rust-lang/crates.io-index)",
+ "miniz-sys 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -567,7 +568,7 @@ version = "0.4.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.30 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.31 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -582,7 +583,7 @@ dependencies = [
 
 [[package]]
 name = "futures"
-version = "0.1.15"
+version = "0.1.16"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -592,7 +593,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "getopts"
-version = "0.2.14"
+version = "0.2.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -601,10 +602,10 @@ version = "0.6.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "bitflags 0.9.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.30 (registry+https://github.com/rust-lang/crates.io-index)",
- "libgit2-sys 0.6.14 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.31 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libgit2-sys 0.6.15 (registry+https://github.com/rust-lang/crates.io-index)",
  "openssl-probe 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "openssl-sys 0.9.17 (registry+https://github.com/rust-lang/crates.io-index)",
+ "openssl-sys 0.9.19 (registry+https://github.com/rust-lang/crates.io-index)",
  "url 1.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -661,10 +662,10 @@ dependencies = [
  "lazy_static 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "pest 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "quick-error 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "quick-error 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "regex 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde 1.0.11 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_json 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde 1.0.15 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -753,9 +754,9 @@ version = "0.1.0"
 name = "installer"
 version = "0.0.0"
 dependencies = [
- "clap 2.26.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "clap 2.26.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "error-chain 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "flate2 0.2.19 (registry+https://github.com/rust-lang/crates.io-index)",
+ "flate2 0.2.20 (registry+https://github.com/rust-lang/crates.io-index)",
  "kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "lazy_static 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "tar 0.4.13 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -766,7 +767,7 @@ dependencies = [
 
 [[package]]
 name = "itoa"
-version = "0.3.3"
+version = "0.3.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -774,20 +775,20 @@ name = "jobserver"
 version = "0.1.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "libc 0.2.30 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.31 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand 0.3.16 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "jsonrpc-core"
-version = "7.1.0"
+version = "7.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "futures 0.1.15 (registry+https://github.com/rust-lang/crates.io-index)",
+ "futures 0.1.16 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde 1.0.11 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_derive 1.0.11 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_json 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde 1.0.15 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_derive 1.0.15 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -816,9 +817,9 @@ version = "0.12.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "enum_primitive 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde 1.0.11 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_derive 1.0.11 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_json 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde 1.0.15 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_derive 1.0.15 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "url 1.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "url_serde 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -837,21 +838,21 @@ dependencies = [
 
 [[package]]
 name = "libc"
-version = "0.2.30"
+version = "0.2.31"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "libgit2-sys"
-version = "0.6.14"
+version = "0.6.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "cmake 0.1.25 (registry+https://github.com/rust-lang/crates.io-index)",
- "curl-sys 0.3.14 (registry+https://github.com/rust-lang/crates.io-index)",
- "gcc 0.3.54 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.30 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cc 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cmake 0.1.26 (registry+https://github.com/rust-lang/crates.io-index)",
+ "curl-sys 0.3.15 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.31 (registry+https://github.com/rust-lang/crates.io-index)",
  "libssh2-sys 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "libz-sys 1.0.16 (registry+https://github.com/rust-lang/crates.io-index)",
- "openssl-sys 0.9.17 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libz-sys 1.0.17 (registry+https://github.com/rust-lang/crates.io-index)",
+ "openssl-sys 0.9.19 (registry+https://github.com/rust-lang/crates.io-index)",
  "pkg-config 0.3.9 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -860,20 +861,20 @@ name = "libssh2-sys"
 version = "0.2.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "cmake 0.1.25 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.30 (registry+https://github.com/rust-lang/crates.io-index)",
- "libz-sys 1.0.16 (registry+https://github.com/rust-lang/crates.io-index)",
- "openssl-sys 0.9.17 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cmake 0.1.26 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.31 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libz-sys 1.0.17 (registry+https://github.com/rust-lang/crates.io-index)",
+ "openssl-sys 0.9.19 (registry+https://github.com/rust-lang/crates.io-index)",
  "pkg-config 0.3.9 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "libz-sys"
-version = "1.0.16"
+version = "1.0.17"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "gcc 0.3.54 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.30 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cc 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.31 (registry+https://github.com/rust-lang/crates.io-index)",
  "pkg-config 0.3.9 (registry+https://github.com/rust-lang/crates.io-index)",
  "vcpkg 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -889,12 +890,13 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "lzma-sys"
-version = "0.1.8"
+version = "0.1.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "filetime 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
- "gcc 0.3.54 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.30 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cc 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "filetime 0.1.12 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.31 (registry+https://github.com/rust-lang/crates.io-index)",
+ "pkg-config 0.3.9 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -942,18 +944,18 @@ name = "mdbook"
 version = "0.0.25"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "clap 2.26.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "clap 2.26.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "env_logger 0.4.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "error-chain 0.10.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "handlebars 0.27.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "lazy_static 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "open 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "open 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "pulldown-cmark 0.0.14 (registry+https://github.com/rust-lang/crates.io-index)",
  "regex 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde 1.0.11 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_derive 1.0.11 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_json 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde 1.0.15 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_derive 1.0.15 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "tempdir 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "toml 0.4.5 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -963,7 +965,7 @@ name = "memchr"
 version = "0.1.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "libc 0.2.30 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.31 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -971,16 +973,16 @@ name = "memchr"
 version = "1.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "libc 0.2.30 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.31 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "miniz-sys"
-version = "0.1.9"
+version = "0.1.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "gcc 0.3.54 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.30 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cc 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.31 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -1005,7 +1007,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "cfg-if 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.30 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.31 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "ws2_32-sys 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -1081,7 +1083,7 @@ name = "num_cpus"
 version = "1.6.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "libc 0.2.30 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.31 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -1090,19 +1092,19 @@ version = "0.1.0"
 
 [[package]]
 name = "open"
-version = "1.2.0"
+version = "1.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "openssl"
-version = "0.9.17"
+version = "0.9.19"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "bitflags 0.9.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "foreign-types 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "lazy_static 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.30 (registry+https://github.com/rust-lang/crates.io-index)",
- "openssl-sys 0.9.17 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.31 (registry+https://github.com/rust-lang/crates.io-index)",
+ "openssl-sys 0.9.19 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -1112,11 +1114,11 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "openssl-sys"
-version = "0.9.17"
+version = "0.9.19"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "gcc 0.3.54 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.30 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cc 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.31 (registry+https://github.com/rust-lang/crates.io-index)",
  "pkg-config 0.3.9 (registry+https://github.com/rust-lang/crates.io-index)",
  "vcpkg 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -1219,8 +1221,8 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 name = "profiler_builtins"
 version = "0.0.0"
 dependencies = [
+ "cc 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "core 0.0.0",
- "gcc 0.3.54 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -1238,12 +1240,12 @@ version = "0.0.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "bitflags 0.8.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "getopts 0.2.14 (registry+https://github.com/rust-lang/crates.io-index)",
+ "getopts 0.2.15 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "quick-error"
-version = "1.2.0"
+version = "1.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -1261,7 +1263,7 @@ name = "racer"
 version = "2.0.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "clap 2.26.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "clap 2.26.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "env_logger 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "syntex_errors 0.52.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1282,10 +1284,15 @@ name = "rand"
 version = "0.3.16"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "libc 0.2.30 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.31 (registry+https://github.com/rust-lang/crates.io-index)",
  "magenta 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "redox_syscall"
+version = "0.1.31"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "reformat"
 version = "0.1.0"
@@ -1346,26 +1353,26 @@ version = "0.122.0"
 dependencies = [
  "cargo 0.23.0",
  "env_logger 0.4.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "jsonrpc-core 7.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "jsonrpc-core 7.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "languageserver-types 0.12.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "lazy_static 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "racer 2.0.10 (registry+https://github.com/rust-lang/crates.io-index)",
- "rls-analysis 0.6.7 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rls-analysis 0.6.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "rls-data 0.10.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "rls-rustc 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "rls-span 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "rls-vfs 0.4.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "rustfmt-nightly 0.2.5",
- "serde 1.0.11 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_derive 1.0.11 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_json 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rustfmt-nightly 0.2.7",
+ "serde 1.0.15 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_derive 1.0.15 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "url 1.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "rls-analysis"
-version = "0.6.7"
+version = "0.6.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "derive-new 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1382,8 +1389,8 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "rls-span 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "rustc-serialize 0.3.24 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde 1.0.11 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_derive 1.0.11 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde 1.0.15 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_derive 1.0.15 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -1397,8 +1404,8 @@ version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "rustc-serialize 0.3.24 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde 1.0.11 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_derive 1.0.11 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde 1.0.15 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_derive 1.0.15 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -1414,7 +1421,7 @@ dependencies = [
 name = "rustbook"
 version = "0.1.0"
 dependencies = [
- "clap 2.26.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "clap 2.26.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "mdbook 0.0.25 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -1424,7 +1431,7 @@ version = "0.0.0"
 dependencies = [
  "arena 0.0.0",
  "bitflags 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "flate2 0.2.19 (registry+https://github.com/rust-lang/crates.io-index)",
+ "flate2 0.2.20 (registry+https://github.com/rust-lang/crates.io-index)",
  "fmt_macros 0.0.0",
  "graphviz 0.0.0",
  "jobserver 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1482,7 +1489,7 @@ dependencies = [
  "alloc 0.0.0",
  "alloc_system 0.0.0",
  "build_helper 0.1.0",
- "cmake 0.1.25 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cmake 0.1.26 (registry+https://github.com/rust-lang/crates.io-index)",
  "core 0.0.0",
 ]
 
@@ -1621,7 +1628,7 @@ version = "0.0.0"
 dependencies = [
  "bitflags 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "build_helper 0.1.0",
- "gcc 0.3.54 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cc 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "rustc_cratesio_shim 0.0.0",
 ]
 
@@ -1632,7 +1639,7 @@ dependencies = [
  "alloc 0.0.0",
  "alloc_system 0.0.0",
  "build_helper 0.1.0",
- "cmake 0.1.25 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cmake 0.1.26 (registry+https://github.com/rust-lang/crates.io-index)",
  "core 0.0.0",
 ]
 
@@ -1640,7 +1647,7 @@ dependencies = [
 name = "rustc_metadata"
 version = "0.0.0"
 dependencies = [
- "flate2 0.2.19 (registry+https://github.com/rust-lang/crates.io-index)",
+ "flate2 0.2.20 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "owning_ref 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "proc_macro 0.0.0",
@@ -1677,7 +1684,7 @@ dependencies = [
  "alloc 0.0.0",
  "alloc_system 0.0.0",
  "build_helper 0.1.0",
- "cmake 0.1.25 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cmake 0.1.26 (registry+https://github.com/rust-lang/crates.io-index)",
  "core 0.0.0",
 ]
 
@@ -1752,8 +1759,8 @@ name = "rustc_trans"
 version = "0.0.0"
 dependencies = [
  "bitflags 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "flate2 0.2.19 (registry+https://github.com/rust-lang/crates.io-index)",
- "gcc 0.3.54 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cc 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "flate2 0.2.20 (registry+https://github.com/rust-lang/crates.io-index)",
  "jobserver 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "num_cpus 1.6.2 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1779,7 +1786,7 @@ name = "rustc_trans_utils"
 version = "0.0.0"
 dependencies = [
  "ar 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "flate2 0.2.19 (registry+https://github.com/rust-lang/crates.io-index)",
+ "flate2 0.2.20 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "owning_ref 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "rustc 0.0.0",
@@ -1795,7 +1802,7 @@ dependencies = [
  "alloc 0.0.0",
  "alloc_system 0.0.0",
  "build_helper 0.1.0",
- "cmake 0.1.25 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cmake 0.1.26 (registry+https://github.com/rust-lang/crates.io-index)",
  "core 0.0.0",
 ]
 
@@ -1821,8 +1828,8 @@ name = "rustdoc"
 version = "0.0.0"
 dependencies = [
  "build_helper 0.1.0",
+ "cc 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "env_logger 0.4.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "gcc 0.3.54 (registry+https://github.com/rust-lang/crates.io-index)",
  "html-diff 0.0.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "pulldown-cmark 0.0.14 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1837,18 +1844,18 @@ dependencies = [
 
 [[package]]
 name = "rustfmt-nightly"
-version = "0.2.5"
+version = "0.2.7"
 dependencies = [
  "diff 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
  "env_logger 0.4.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "getopts 0.2.14 (registry+https://github.com/rust-lang/crates.io-index)",
+ "getopts 0.2.15 (registry+https://github.com/rust-lang/crates.io-index)",
  "kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.30 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.31 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "regex 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde 1.0.11 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_derive 1.0.11 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_json 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde 1.0.15 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_derive 1.0.15 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "strings 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "term 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "toml 0.4.5 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1896,7 +1903,7 @@ version = "0.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "semver-parser 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde 1.0.11 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde 1.0.15 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -1906,22 +1913,22 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "serde"
-version = "1.0.11"
+version = "1.0.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "serde_derive"
-version = "1.0.11"
+version = "1.0.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "quote 0.3.15 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_derive_internals 0.15.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_derive_internals 0.16.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "syn 0.11.11 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "serde_derive_internals"
-version = "0.15.1"
+version = "0.16.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "syn 0.11.11 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1933,18 +1940,18 @@ name = "serde_ignored"
 version = "0.0.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "serde 1.0.11 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde 1.0.15 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "serde_json"
-version = "1.0.2"
+version = "1.0.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "dtoa 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "itoa 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "itoa 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "num-traits 0.1.40 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde 1.0.11 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde 1.0.15 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -1968,12 +1975,12 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "socket2"
-version = "0.2.2"
+version = "0.2.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "cfg-if 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.30 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.31 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "ws2_32-sys 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -1991,10 +1998,10 @@ dependencies = [
  "alloc_jemalloc 0.0.0",
  "alloc_system 0.0.0",
  "build_helper 0.1.0",
+ "cc 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "collections 0.0.0",
  "compiler_builtins 0.0.0",
  "core 0.0.0",
- "gcc 0.3.54 (registry+https://github.com/rust-lang/crates.io-index)",
  "libc 0.0.0",
  "panic_abort 0.0.0",
  "panic_unwind 0.0.0",
@@ -2024,7 +2031,7 @@ dependencies = [
  "lazy_static 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "phf_shared 0.7.21 (registry+https://github.com/rust-lang/crates.io-index)",
  "precomputed-hash 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde 1.0.11 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde 1.0.15 (registry+https://github.com/rust-lang/crates.io-index)",
  "string_cache_codegen 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "string_cache_shared 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -2122,7 +2129,7 @@ name = "syntex_errors"
 version = "0.52.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "libc 0.2.30 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.31 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "rustc-serialize 0.3.24 (registry+https://github.com/rust-lang/crates.io-index)",
  "syntex_pos 0.52.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -2144,7 +2151,7 @@ version = "0.52.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "bitflags 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.30 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.31 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "rustc-serialize 0.3.24 (registry+https://github.com/rust-lang/crates.io-index)",
  "syntex_errors 0.52.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -2158,8 +2165,8 @@ name = "tar"
 version = "0.4.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "filetime 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.30 (registry+https://github.com/rust-lang/crates.io-index)",
+ "filetime 0.1.12 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.31 (registry+https://github.com/rust-lang/crates.io-index)",
  "xattr 0.1.11 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -2200,7 +2207,7 @@ version = "0.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.30 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.31 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -2216,13 +2223,13 @@ dependencies = [
 name = "test"
 version = "0.0.0"
 dependencies = [
- "getopts 0.2.14 (registry+https://github.com/rust-lang/crates.io-index)",
+ "getopts 0.2.15 (registry+https://github.com/rust-lang/crates.io-index)",
  "term 0.0.0",
 ]
 
 [[package]]
 name = "textwrap"
-version = "0.7.0"
+version = "0.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "term_size 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -2235,7 +2242,7 @@ version = "2.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.30 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.31 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -2272,7 +2279,7 @@ name = "toml"
 version = "0.4.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "serde 1.0.11 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde 1.0.15 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -2313,6 +2320,10 @@ name = "unicode-xid"
 version = "0.0.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "unicødë"
+version = "0.1.0"
+
 [[package]]
 name = "unreachable"
 version = "0.1.1"
@@ -2336,6 +2347,14 @@ dependencies = [
  "tidy 0.1.0",
 ]
 
+[[package]]
+name = "unwind"
+version = "0.0.0"
+dependencies = [
+ "core 0.0.0",
+ "libc 0.0.0",
+]
+
 [[package]]
 name = "url"
 version = "1.5.1"
@@ -2351,7 +2370,7 @@ name = "url_serde"
 version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "serde 1.0.11 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde 1.0.15 (registry+https://github.com/rust-lang/crates.io-index)",
  "url 1.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -2440,7 +2459,7 @@ name = "xattr"
 version = "0.1.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "libc 0.2.30 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.31 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -2448,7 +2467,7 @@ name = "xz2"
 version = "0.1.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "lzma-sys 0.1.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lzma-sys 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -2463,16 +2482,17 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum ansi_term 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)" = "23ac7c30002a5accbf7e8987d0632fa6de155b7c3d39d0067317a391e00a2ef6"
 "checksum ar 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)" = "b24e4eef8e3fa7e2ca75b157e6039cdf8d9d3a68213ddc19d0fd9d576b9717c9"
 "checksum atty 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "d912da0db7fa85514874458ca3651fe2cddace8d0b0505571dbdcd41ab490159"
-"checksum backtrace 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)" = "72f9b4182546f4b04ebc4ab7f84948953a118bd6021a1b6a6c909e3e94f6be76"
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 "checksum quote 0.3.15 (registry+https://github.com/rust-lang/crates.io-index)" = "7a6e920b65c65f10b2ae65c831a81a073a89edd28c7cce89475bff467ab4167a"
 "checksum racer 2.0.10 (registry+https://github.com/rust-lang/crates.io-index)" = "f120c7510ef7aff254aeb06067fb6fac573ec96a1660e194787cf9dced412bf0"
 "checksum rand 0.3.16 (registry+https://github.com/rust-lang/crates.io-index)" = "eb250fd207a4729c976794d03db689c9be1d634ab5a1c9da9492a13d8fecbcdf"
+"checksum redox_syscall 0.1.31 (registry+https://github.com/rust-lang/crates.io-index)" = "8dde11f18c108289bef24469638a04dce49da56084f2d50618b226e47eb04509"
 "checksum regex 0.1.80 (registry+https://github.com/rust-lang/crates.io-index)" = "4fd4ace6a8cf7860714a2c2280d6c1f7e6a413486c13298bbc86fd3da019402f"
 "checksum regex 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "1731164734096285ec2a5ec7fea5248ae2f5485b3feeb0115af4fda2183b2d1b"
 "checksum regex-syntax 0.3.9 (registry+https://github.com/rust-lang/crates.io-index)" = "f9ec002c35e86791825ed294b50008eea9ddfc8def4420124fbc6b08db834957"
 "checksum regex-syntax 0.4.1 (registry+https://github.com/rust-lang/crates.io-index)" = "ad890a5eef7953f55427c50575c680c42841653abd2b028b68cd223d157f62db"
-"checksum rls-analysis 0.6.7 (registry+https://github.com/rust-lang/crates.io-index)" = "4302cc8291570d7f817945845d8c01756e833dbc93c0a87d4f6c9a0b0b7992f1"
+"checksum rls-analysis 0.6.8 (registry+https://github.com/rust-lang/crates.io-index)" = "fa390bdc70b0a90d07d9cd5c6989ba5fca2d59728903919ebda1a1b2037b18d7"
 "checksum rls-data 0.10.0 (registry+https://github.com/rust-lang/crates.io-index)" = "11d339f1888e33e74d8032de0f83c40b2bdaaaf04a8cfc03b32186c3481fb534"
 "checksum rls-rustc 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "b21ea952e9bf1569929abf1bb920262cde04b7b1b26d8e0260286302807299d2"
 "checksum rls-span 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "5d7c7046dc6a92f2ae02ed302746db4382e75131b9ce20ce967259f6b5867a6a"
@@ -2585,15 +2606,15 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum selectors 0.18.0 (registry+https://github.com/rust-lang/crates.io-index)" = "e3c89b1c6a3c029c82263f7dd2d44d0005ee7374eb09e254ab59dede4353a8c0"
 "checksum semver 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)" = "bee2bc909ab2d8d60dab26e8cad85b25d795b14603a0dcb627b78b9d30b6454b"
 "checksum semver-parser 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)" = "388a1df253eca08550bef6c72392cfe7c30914bf41df5269b68cbd6ff8f570a3"
-"checksum serde 1.0.11 (registry+https://github.com/rust-lang/crates.io-index)" = "f7726f29ddf9731b17ff113c461e362c381d9d69433f79de4f3dd572488823e9"
-"checksum serde_derive 1.0.11 (registry+https://github.com/rust-lang/crates.io-index)" = "cf823e706be268e73e7747b147aa31c8f633ab4ba31f115efb57e5047c3a76dd"
-"checksum serde_derive_internals 0.15.1 (registry+https://github.com/rust-lang/crates.io-index)" = "37aee4e0da52d801acfbc0cc219eb1eda7142112339726e427926a6f6ee65d3a"
+"checksum serde 1.0.15 (registry+https://github.com/rust-lang/crates.io-index)" = "6a7046c9d4c6c522d10b2d098f9bebe2bef227e0e74044d8c1bfcf6b476af799"
+"checksum serde_derive 1.0.15 (registry+https://github.com/rust-lang/crates.io-index)" = "1afcaae083fd1c46952a315062326bc9957f182358eb7da03b57ef1c688f7aa9"
+"checksum serde_derive_internals 0.16.0 (registry+https://github.com/rust-lang/crates.io-index)" = "bd381f6d01a6616cdba8530492d453b7761b456ba974e98768a18cad2cd76f58"
 "checksum serde_ignored 0.0.4 (registry+https://github.com/rust-lang/crates.io-index)" = "190e9765dcedb56be63b6e0993a006c7e3b071a016a304736e4a315dc01fb142"
-"checksum serde_json 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)" = "48b04779552e92037212c3615370f6bd57a40ebba7f20e554ff9f55e41a69a7b"
+"checksum serde_json 1.0.3 (registry+https://github.com/rust-lang/crates.io-index)" = "d243424e06f9f9c39e3cd36147470fd340db785825e367625f79298a6ac6b7ac"
 "checksum shell-escape 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)" = "dd5cc96481d54583947bfe88bf30c23d53f883c6cd0145368b69989d97b84ef8"
 "checksum siphasher 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "0df90a788073e8d0235a67e50441d47db7c8ad9debd91cbf43736a2a92d36537"
 "checksum smallvec 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)" = "4f8266519bc1d17d0b5b16f6c21295625d562841c708f6376f49028a43e9c11e"
-"checksum socket2 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "4daf80fcf54186fac4fe049e0b39d36a5cfde69a11a06413e61e77f553cccf9a"
+"checksum socket2 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)" = "9e76b159741052c7deaa9fd0b5ca6b5f79cecf525ed665abfe5002086c6b2791"
 "checksum stable_deref_trait 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "15132e0e364248108c5e2c02e3ab539be8d6f5d52a01ca9bbf27ed657316f02b"
 "checksum string_cache 0.6.2 (registry+https://github.com/rust-lang/crates.io-index)" = "413fc7852aeeb5472f1986ef755f561ddf0c789d3d796e65f0b6fe293ecd4ef8"
 "checksum string_cache_codegen 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "479cde50c3539481f33906a387f2bd17c8e87cb848c35b6021d41fb81ff9b4d7"
@@ -2612,7 +2633,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum term 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)" = "fa63644f74ce96fbeb9b794f66aff2a52d601cbd5e80f4b97123e3899f4570f1"
 "checksum term_size 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)" = "e2b6b55df3198cc93372e85dd2ed817f0e38ce8cc0f22eb32391bfad9c4bf209"
 "checksum termcolor 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)" = "9065bced9c3e43453aa3d56f1e98590b8455b341d2fa191a1090c0dd0b242c75"
-"checksum textwrap 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)" = "f728584ea33b0ad19318e20557cb0a39097751dbb07171419673502f848c7af6"
+"checksum textwrap 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)" = "df8e08afc40ae3459e4838f303e465aa50d823df8d7f83ca88108f6d3afe7edd"
 "checksum thread-id 2.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "a9539db560102d1cef46b8b78ce737ff0bb64e7e18d35b2a5688f7d097d0ff03"
 "checksum thread_local 0.2.7 (registry+https://github.com/rust-lang/crates.io-index)" = "8576dbbfcaef9641452d5cf0df9b0e7eeab7694956dd33bb61515fb8f18cfdd5"
 "checksum thread_local 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)" = "1697c4b57aeeb7a536b647165a2825faddffb1d3bad386d507709bd51a90bb14"
diff --git a/src/Cargo.toml b/src/Cargo.toml
index 12c074b6a4162..f4b4189e01f06 100644
--- a/src/Cargo.toml
+++ b/src/Cargo.toml
@@ -38,6 +38,8 @@ members = [
   "tools/rls/test_data/infer_custom_bin",
   "tools/rls/test_data/infer_lib",
   "tools/rls/test_data/omit_init_build",
+  "tools/rls/test_data/unicødë",
+  "tools/rls/test_data/workspace_symbol",
 ]
 
 # Curiously, compiletest will segfault if compiled with opt-level=3 on 64-bit
@@ -60,10 +62,5 @@ debug-assertions = false
 [patch."https://github.com/rust-lang/cargo"]
 cargo = { path = "tools/cargo" }
 
-# Override rustfmt dependencies both on the repo and the crate (the RLS
-# sometimes uses either).
-# FIXME should only need the crates.io patch, long term.
-[patch."https://github.com/rust-lang-nursery/rustfmt"]
-rustfmt-nightly = { path = "tools/rustfmt" }
 [patch.crates-io]
 rustfmt-nightly = { path = "tools/rustfmt" }
diff --git a/src/bootstrap/Cargo.toml b/src/bootstrap/Cargo.toml
index 85e3b65c1953c..3f1d03b187203 100644
--- a/src/bootstrap/Cargo.toml
+++ b/src/bootstrap/Cargo.toml
@@ -34,7 +34,7 @@ cmake = "0.1.23"
 filetime = "0.1"
 num_cpus = "1.0"
 getopts = "0.2"
-gcc = "0.3.54"
+cc = "1.0"
 libc = "0.2"
 serde = "1.0.8"
 serde_derive = "1.0.8"
diff --git a/src/bootstrap/bin/sccache-plus-cl.rs b/src/bootstrap/bin/sccache-plus-cl.rs
index 266dffa5c92c7..8584014d48d5f 100644
--- a/src/bootstrap/bin/sccache-plus-cl.rs
+++ b/src/bootstrap/bin/sccache-plus-cl.rs
@@ -8,7 +8,7 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-extern crate gcc;
+extern crate cc;
 
 use std::env;
 use std::process::{self, Command};
@@ -18,7 +18,7 @@ fn main() {
     // Locate the actual compiler that we're invoking
     env::remove_var("CC");
     env::remove_var("CXX");
-    let mut cfg = gcc::Build::new();
+    let mut cfg = cc::Build::new();
     cfg.cargo_metadata(false)
        .out_dir("/")
        .target(&target)
diff --git a/src/bootstrap/builder.rs b/src/bootstrap/builder.rs
index ffd959d86f580..e7a5196178c3f 100644
--- a/src/bootstrap/builder.rs
+++ b/src/bootstrap/builder.rs
@@ -306,7 +306,7 @@ impl<'a> Builder<'a> {
             Subcommand::Bench { ref paths, .. } => (Kind::Bench, &paths[..]),
             Subcommand::Dist { ref paths } => (Kind::Dist, &paths[..]),
             Subcommand::Install { ref paths } => (Kind::Install, &paths[..]),
-            Subcommand::Clean => panic!(),
+            Subcommand::Clean { .. } => panic!(),
         };
 
         let builder = Builder {
diff --git a/src/bootstrap/cc.rs b/src/bootstrap/cc_detect.rs
similarity index 96%
rename from src/bootstrap/cc.rs
rename to src/bootstrap/cc_detect.rs
index c77e609d70be0..08df65c761182 100644
--- a/src/bootstrap/cc.rs
+++ b/src/bootstrap/cc_detect.rs
@@ -23,7 +23,7 @@
 //! 6. "cc"
 //!
 //! Some of this logic is implemented here, but much of it is farmed out to the
-//! `gcc` crate itself, so we end up having the same fallbacks as there.
+//! `cc` crate itself, so we end up having the same fallbacks as there.
 //! Similar logic is then used to find a C++ compiler, just some s/cc/c++/ is
 //! used.
 //!
@@ -35,7 +35,7 @@ use std::process::Command;
 use std::iter;
 
 use build_helper::{cc2ar, output};
-use gcc;
+use cc;
 
 use Build;
 use config::Target;
@@ -45,7 +45,7 @@ pub fn find(build: &mut Build) {
     // For all targets we're going to need a C compiler for building some shims
     // and such as well as for being a linker for Rust code.
     for target in build.targets.iter().chain(&build.hosts).cloned().chain(iter::once(build.build)) {
-        let mut cfg = gcc::Build::new();
+        let mut cfg = cc::Build::new();
         cfg.cargo_metadata(false).opt_level(0).warnings(false).debug(false)
            .target(&target).host(&build.build);
 
@@ -67,7 +67,7 @@ pub fn find(build: &mut Build) {
 
     // For all host triples we need to find a C++ compiler as well
     for host in build.hosts.iter().cloned().chain(iter::once(build.build)) {
-        let mut cfg = gcc::Build::new();
+        let mut cfg = cc::Build::new();
         cfg.cargo_metadata(false).opt_level(0).warnings(false).debug(false).cpp(true)
            .target(&host).host(&build.build);
         let config = build.config.target_config.get(&host);
@@ -82,7 +82,7 @@ pub fn find(build: &mut Build) {
     }
 }
 
-fn set_compiler(cfg: &mut gcc::Build,
+fn set_compiler(cfg: &mut cc::Build,
                 gnu_compiler: &str,
                 target: Interned<String>,
                 config: Option<&Target>,
diff --git a/src/bootstrap/check.rs b/src/bootstrap/check.rs
index 21e7a05236266..6e276f44668f7 100644
--- a/src/bootstrap/check.rs
+++ b/src/bootstrap/check.rs
@@ -254,7 +254,11 @@ impl Step for Rls {
 
         builder.add_rustc_lib_path(compiler, &mut cargo);
 
-        try_run(build, &mut cargo);
+        try_run_expecting(
+            build,
+            &mut cargo,
+            builder.build.config.toolstate.rls.passes(ToolState::Testing),
+        );
     }
 }
 
@@ -295,7 +299,11 @@ impl Step for Rustfmt {
 
         builder.add_rustc_lib_path(compiler, &mut cargo);
 
-        try_run(build, &mut cargo);
+        try_run_expecting(
+            build,
+            &mut cargo,
+            builder.build.config.toolstate.rustfmt.passes(ToolState::Testing),
+        );
     }
 }
 
diff --git a/src/bootstrap/clean.rs b/src/bootstrap/clean.rs
index 119340a0190c4..87f194fb7d2f8 100644
--- a/src/bootstrap/clean.rs
+++ b/src/bootstrap/clean.rs
@@ -13,7 +13,7 @@
 //! Responsible for cleaning out a build directory of all old and stale
 //! artifacts to prepare for a fresh build. Currently doesn't remove the
 //! `build/cache` directory (download cache) or the `build/$target/llvm`
-//! directory as we want that cached between builds.
+//! directory unless the --all flag is present.
 
 use std::fs;
 use std::io::{self, ErrorKind};
@@ -21,24 +21,29 @@ use std::path::Path;
 
 use Build;
 
-pub fn clean(build: &Build) {
+pub fn clean(build: &Build, all: bool) {
     rm_rf("tmp".as_ref());
-    rm_rf(&build.out.join("tmp"));
-    rm_rf(&build.out.join("dist"));
 
-    for host in &build.hosts {
-        let entries = match build.out.join(host).read_dir() {
-            Ok(iter) => iter,
-            Err(_) => continue,
-        };
+    if all {
+        rm_rf(&build.out);
+    } else {
+        rm_rf(&build.out.join("tmp"));
+        rm_rf(&build.out.join("dist"));
 
-        for entry in entries {
-            let entry = t!(entry);
-            if entry.file_name().to_str() == Some("llvm") {
-                continue
+        for host in &build.hosts {
+            let entries = match build.out.join(host).read_dir() {
+                Ok(iter) => iter,
+                Err(_) => continue,
+            };
+
+            for entry in entries {
+                let entry = t!(entry);
+                if entry.file_name().to_str() == Some("llvm") {
+                    continue
+                }
+                let path = t!(entry.path().canonicalize());
+                rm_rf(&path);
             }
-            let path = t!(entry.path().canonicalize());
-            rm_rf(&path);
         }
     }
 }
diff --git a/src/bootstrap/configure.py b/src/bootstrap/configure.py
index 2438be89776da..67337bf44214e 100755
--- a/src/bootstrap/configure.py
+++ b/src/bootstrap/configure.py
@@ -109,6 +109,8 @@ def v(*args):
   "arm-unknown-linux-musleabihf install directory")
 v("musl-root-armv7", "target.armv7-unknown-linux-musleabihf.musl-root",
   "armv7-unknown-linux-musleabihf install directory")
+v("musl-root-aarch64", "target.aarch64-unknown-linux-musl.musl-root",
+  "aarch64-unknown-linux-musl install directory")
 v("qemu-armhf-rootfs", "target.arm-unknown-linux-gnueabihf.qemu-rootfs",
   "rootfs in qemu testing, you probably don't want to use this")
 v("qemu-aarch64-rootfs", "target.aarch64-unknown-linux-gnu.qemu-rootfs",
diff --git a/src/bootstrap/dist.rs b/src/bootstrap/dist.rs
index 5188604b0a69a..3d4aa0413db61 100644
--- a/src/bootstrap/dist.rs
+++ b/src/bootstrap/dist.rs
@@ -1098,13 +1098,8 @@ impl Step for Rls {
            .arg("--output-dir").arg(&distdir(build))
            .arg("--non-installed-overlay").arg(&overlay)
            .arg(format!("--package-name={}-{}", name, target))
-           .arg("--legacy-manifest-dirs=rustlib,cargo");
-
-        if build.config.channel == "nightly" {
-            cmd.arg("--component-name=rls");
-        } else {
-            cmd.arg("--component-name=rls-preview");
-        }
+           .arg("--legacy-manifest-dirs=rustlib,cargo")
+           .arg("--component-name=rls-preview");
 
         build.run(&mut cmd);
         distdir(build).join(format!("{}-{}.tar.gz", name, target))
@@ -1333,12 +1328,8 @@ impl Step for Extended {
             cp_r(&work.join(&format!("{}-{}", pkgname(build, "rust-std"), target))
                         .join(format!("rust-std-{}", target)),
                     &exe.join("rust-std"));
-            let rls_path = if build.config.channel == "nightly" {
-                work.join(&format!("{}-{}", pkgname(build, "rls"), target)).join("rls")
-            } else {
-                work.join(&format!("{}-{}", pkgname(build, "rls"), target)).join("rls-preview")
-            };
-            cp_r(&rls_path, &exe.join("rls"));
+            cp_r(&work.join(&format!("{}-{}", pkgname(build, "rls"), target)).join("rls-preview"),
+                 &exe.join("rls"));
             cp_r(&work.join(&format!("{}-{}", pkgname(build, "rust-analysis"), target))
                         .join(format!("rust-analysis-{}", target)),
                     &exe.join("rust-analysis"));
diff --git a/src/bootstrap/flags.rs b/src/bootstrap/flags.rs
index 7546d7fd4f07a..df378188b4ad0 100644
--- a/src/bootstrap/flags.rs
+++ b/src/bootstrap/flags.rs
@@ -60,7 +60,9 @@ pub enum Subcommand {
         paths: Vec<PathBuf>,
         test_args: Vec<String>,
     },
-    Clean,
+    Clean {
+        all: bool,
+    },
     Dist {
         paths: Vec<PathBuf>,
     },
@@ -147,6 +149,7 @@ To learn more about a subcommand, run `./x.py <subcommand> -h`");
                 opts.optmulti("", "test-args", "extra arguments", "ARGS");
             },
             "bench" => { opts.optmulti("", "test-args", "extra arguments", "ARGS"); },
+            "clean" => { opts.optflag("", "all", "clean all build artifacts"); },
             _ => { },
         };
 
@@ -250,7 +253,7 @@ Arguments:
             }
         });
 
-        // All subcommands can have an optional "Available paths" section
+        // All subcommands except `clean` can have an optional "Available paths" section
         if matches.opt_present("verbose") {
             let config = Config::parse(&["build".to_string()]);
             let mut build = Build::new(config);
@@ -258,9 +261,10 @@ Arguments:
 
             let maybe_rules_help = Builder::get_help(&build, subcommand.as_str());
             extra_help.push_str(maybe_rules_help.unwrap_or_default().as_str());
-        } else {
-            extra_help.push_str(format!("Run `./x.py {} -h -v` to see a list of available paths.",
-                     subcommand).as_str());
+        } else if subcommand.as_str() != "clean" {
+            extra_help.push_str(format!(
+                "Run `./x.py {} -h -v` to see a list of available paths.",
+                subcommand).as_str());
         }
 
         // User passed in -h/--help?
@@ -290,10 +294,13 @@ Arguments:
             }
             "clean" => {
                 if paths.len() > 0 {
-                    println!("\nclean takes no arguments\n");
+                    println!("\nclean does not take a path argument\n");
                     usage(1, &opts, &subcommand_help, &extra_help);
                 }
-                Subcommand::Clean
+
+                Subcommand::Clean {
+                    all: matches.opt_present("all"),
+                }
             }
             "dist" => {
                 Subcommand::Dist {
diff --git a/src/bootstrap/lib.rs b/src/bootstrap/lib.rs
index 06c7c4c2faffc..2d721f455785a 100644
--- a/src/bootstrap/lib.rs
+++ b/src/bootstrap/lib.rs
@@ -126,7 +126,7 @@ extern crate lazy_static;
 extern crate serde_json;
 extern crate cmake;
 extern crate filetime;
-extern crate gcc;
+extern crate cc;
 extern crate getopts;
 extern crate num_cpus;
 extern crate toml;
@@ -148,7 +148,7 @@ use build_helper::{run_silent, run_suppressed, try_run_silent, try_run_suppresse
 
 use util::{exe, libdir, OutputFolder, CiEnv};
 
-mod cc;
+mod cc_detect;
 mod channel;
 mod check;
 mod clean;
@@ -241,9 +241,9 @@ pub struct Build {
 
     // Runtime state filled in later on
     // target -> (cc, ar)
-    cc: HashMap<Interned<String>, (gcc::Tool, Option<PathBuf>)>,
+    cc: HashMap<Interned<String>, (cc::Tool, Option<PathBuf>)>,
     // host -> (cc, ar)
-    cxx: HashMap<Interned<String>, gcc::Tool>,
+    cxx: HashMap<Interned<String>, cc::Tool>,
     crates: HashMap<Interned<String>, Crate>,
     is_sudo: bool,
     ci_env: CiEnv,
@@ -345,12 +345,12 @@ impl Build {
             job::setup(self);
         }
 
-        if let Subcommand::Clean = self.config.cmd {
-            return clean::clean(self);
+        if let Subcommand::Clean { all } = self.config.cmd {
+            return clean::clean(self, all);
         }
 
         self.verbose("finding compilers");
-        cc::find(self);
+        cc_detect::find(self);
         self.verbose("running sanity check");
         sanity::check(self);
         // If local-rust is the same major.minor as the current version, then force a local-rebuild
@@ -619,7 +619,7 @@ impl Build {
     /// specified.
     fn cflags(&self, target: Interned<String>) -> Vec<String> {
         // Filter out -O and /O (the optimization flags) that we picked up from
-        // gcc-rs because the build scripts will determine that for themselves.
+        // cc-rs because the build scripts will determine that for themselves.
         let mut base = self.cc[&target].0.args().iter()
                            .map(|s| s.to_string_lossy().into_owned())
                            .filter(|s| !s.starts_with("-O") && !s.starts_with("/O"))
diff --git a/src/bootstrap/native.rs b/src/bootstrap/native.rs
index 99077d03dbe03..c4e8063031520 100644
--- a/src/bootstrap/native.rs
+++ b/src/bootstrap/native.rs
@@ -27,7 +27,7 @@ use std::process::Command;
 
 use build_helper::output;
 use cmake;
-use gcc;
+use cc;
 
 use Build;
 use util;
@@ -289,7 +289,7 @@ impl Step for TestHelpers {
         let _folder = build.fold_output(|| "build_test_helpers");
         println!("Building test helpers");
         t!(fs::create_dir_all(&dst));
-        let mut cfg = gcc::Build::new();
+        let mut cfg = cc::Build::new();
 
         // We may have found various cross-compilers a little differently due to our
         // extra configuration, so inform gcc of these compilers. Note, though, that
@@ -367,7 +367,7 @@ impl Step for Openssl {
             if !ok {
                 panic!("failed to download openssl source")
             }
-            let mut shasum = if target.contains("apple") {
+            let mut shasum = if target.contains("apple") || build.build.contains("netbsd") {
                 let mut cmd = Command::new("shasum");
                 cmd.arg("-a").arg("256");
                 cmd
@@ -387,7 +387,7 @@ impl Step for Openssl {
         let dst = build.openssl_install_dir(target).unwrap();
         drop(fs::remove_dir_all(&obj));
         drop(fs::remove_dir_all(&dst));
-        build.run(Command::new("tar").arg("xf").arg(&tarball).current_dir(&out));
+        build.run(Command::new("tar").arg("zxf").arg(&tarball).current_dir(&out));
 
         let mut configure = Command::new("perl");
         configure.arg(obj.join("Configure"));
@@ -399,6 +399,7 @@ impl Step for Openssl {
         let os = match &*target {
             "aarch64-linux-android" => "linux-aarch64",
             "aarch64-unknown-linux-gnu" => "linux-aarch64",
+            "aarch64-unknown-linux-musl" => "linux-aarch64",
             "arm-linux-androideabi" => "android",
             "arm-unknown-linux-gnueabi" => "linux-armv4",
             "arm-unknown-linux-gnueabihf" => "linux-armv4",
diff --git a/src/bootstrap/tool.rs b/src/bootstrap/tool.rs
index e07ffea2a2ee2..a05e58e6a2270 100644
--- a/src/bootstrap/tool.rs
+++ b/src/bootstrap/tool.rs
@@ -126,6 +126,10 @@ pub fn prepare_tool_cargo(
         cargo.env("LIBZ_SYS_STATIC", "1");
     }
 
+    // if tools are using lzma we want to force the build script to build its
+    // own copy
+    cargo.env("LZMA_API_STATIC", "1");
+
     cargo.env("CFG_RELEASE_CHANNEL", &build.config.channel);
     cargo.env("CFG_VERSION", build.rust_version());
 
@@ -454,7 +458,7 @@ impl Step for Rls {
             tool: "rls",
             mode: Mode::Librustc,
             path: "src/tools/rls",
-            expectation: BuildExpectation::None,
+            expectation: builder.build.config.toolstate.rls.passes(ToolState::Compiling),
         })
     }
 }
@@ -489,7 +493,7 @@ impl Step for Rustfmt {
             tool: "rustfmt",
             mode: Mode::Librustc,
             path: "src/tools/rustfmt",
-            expectation: BuildExpectation::None,
+            expectation: builder.build.config.toolstate.rustfmt.passes(ToolState::Compiling),
         })
     }
 }
diff --git a/src/bootstrap/toolstate.rs b/src/bootstrap/toolstate.rs
index 0711c034602b5..8a113f6b4d2df 100644
--- a/src/bootstrap/toolstate.rs
+++ b/src/bootstrap/toolstate.rs
@@ -46,4 +46,6 @@ impl Default for ToolState {
 pub struct ToolStates {
     pub miri: ToolState,
     pub clippy: ToolState,
+    pub rls: ToolState,
+    pub rustfmt: ToolState,
 }
diff --git a/src/ci/docker/cross/Dockerfile b/src/ci/docker/cross/Dockerfile
index a83bbe9c60e8d..05745709a07cb 100644
--- a/src/ci/docker/cross/Dockerfile
+++ b/src/ci/docker/cross/Dockerfile
@@ -14,6 +14,7 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
   zlib1g-dev \
   g++-arm-linux-gnueabi \
   g++-arm-linux-gnueabihf \
+  g++-aarch64-linux-gnu \
   gcc-sparc64-linux-gnu \
   libc6-dev-sparc64-cross \
   bzip2 \
@@ -46,6 +47,7 @@ ENV TARGETS=$TARGETS,mipsel-unknown-linux-musl
 ENV TARGETS=$TARGETS,arm-unknown-linux-musleabi
 ENV TARGETS=$TARGETS,arm-unknown-linux-musleabihf
 ENV TARGETS=$TARGETS,armv7-unknown-linux-musleabihf
+ENV TARGETS=$TARGETS,aarch64-unknown-linux-musl
 ENV TARGETS=$TARGETS,sparc64-unknown-linux-gnu
 ENV TARGETS=$TARGETS,x86_64-unknown-redox
 
@@ -62,7 +64,8 @@ ENV RUST_CONFIGURE_ARGS \
       --target=$TARGETS \
       --musl-root-arm=/usr/local/arm-linux-musleabi \
       --musl-root-armhf=/usr/local/arm-linux-musleabihf \
-      --musl-root-armv7=/usr/local/armv7-linux-musleabihf
+      --musl-root-armv7=/usr/local/armv7-linux-musleabihf \
+      --musl-root-aarch64=/usr/local/aarch64-linux-musl
 ENV SCRIPT python2.7 ../x.py dist --target $TARGETS
 
 # sccache
diff --git a/src/ci/docker/cross/build-arm-musl.sh b/src/ci/docker/cross/build-arm-musl.sh
index 938e69834e434..780099e2ec176 100755
--- a/src/ci/docker/cross/build-arm-musl.sh
+++ b/src/ci/docker/cross/build-arm-musl.sh
@@ -65,11 +65,24 @@ CFLAGS="-march=armv7-a" \
 hide_output make -j$(nproc)
 hide_output make install
 cd ..
+rm -rf musl-$MUSL
+
+tar xf musl-$MUSL.tar.gz
+cd musl-$MUSL
+CC=aarch64-linux-gnu-gcc \
+CFLAGS="" \
+    hide_output ./configure \
+        --prefix=/usr/local/aarch64-linux-musl \
+        --enable-wrapper=gcc
+hide_output make -j$(nproc)
+hide_output make install
+cd ..
 rm -rf musl-$MUSL*
 
 ln -nsf ../arm-linux-musleabi/bin/musl-gcc /usr/local/bin/arm-linux-musleabi-gcc
 ln -nsf ../arm-linux-musleabihf/bin/musl-gcc /usr/local/bin/arm-linux-musleabihf-gcc
 ln -nsf ../armv7-linux-musleabihf/bin/musl-gcc /usr/local/bin/armv7-linux-musleabihf-gcc
+ln -nsf ../aarch64-linux-musl/bin/musl-gcc /usr/local/bin/aarch64-unknown-linux-musl-gcc
 
 curl -L https://github.com/llvm-mirror/llvm/archive/release_39.tar.gz | tar xzf -
 curl -L https://github.com/llvm-mirror/libunwind/archive/release_39.tar.gz | tar xzf -
@@ -116,5 +129,19 @@ cp lib/libunwind.a /usr/local/armv7-linux-musleabihf/lib
 cd ..
 rm -rf libunwind-build
 
+mkdir libunwind-build
+cd libunwind-build
+cmake ../libunwind-release_39 \
+          -DLLVM_PATH=/tmp/llvm-release_39 \
+          -DLIBUNWIND_ENABLE_SHARED=0 \
+          -DCMAKE_C_COMPILER=aarch64-linux-gnu-gcc \
+          -DCMAKE_CXX_COMPILER=aarch64-linux-gnu-g++ \
+          -DCMAKE_C_FLAGS="" \
+          -DCMAKE_CXX_FLAGS=""
+make -j$(nproc)
+cp lib/libunwind.a /usr/local/aarch64-linux-musl/lib
+cd ..
+rm -rf libunwind-build
+
 rm -rf libunwind-release_39
 rm -rf llvm-release_39
diff --git a/src/ci/docker/disabled/aarch64-gnu/Dockerfile b/src/ci/docker/disabled/aarch64-gnu/Dockerfile
index 9a0e45312235e..fedb4094c8aaa 100644
--- a/src/ci/docker/disabled/aarch64-gnu/Dockerfile
+++ b/src/ci/docker/disabled/aarch64-gnu/Dockerfile
@@ -31,7 +31,7 @@ WORKDIR /build
 # The `config` config file was a previously generated config file for
 # the kernel. This file was generated by running `make defconfig`
 # followed by `make menuconfig` and then enabling the IPv6 protocol page.
-COPY disabled/aarch64-gnu/config /build/.config
+COPY aarch64-gnu/config /build/.config
 RUN curl https://cdn.kernel.org/pub/linux/kernel/v4.x/linux-4.4.42.tar.xz | \
       tar xJf - && \
       cd /build/linux-4.4.42 && \
diff --git a/src/ci/docker/disabled/wasm32-exp/Dockerfile b/src/ci/docker/disabled/wasm32-exp/Dockerfile
index 6323369421bb4..8653b0e8b465e 100644
--- a/src/ci/docker/disabled/wasm32-exp/Dockerfile
+++ b/src/ci/docker/disabled/wasm32-exp/Dockerfile
@@ -17,7 +17,7 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
 
 # emscripten
 COPY scripts/emscripten-wasm.sh /scripts/
-COPY disabled/wasm32-exp/node.sh /usr/local/bin/node
+COPY wasm32-exp/node.sh /usr/local/bin/node
 RUN bash /scripts/emscripten-wasm.sh
 
 # cache
diff --git a/src/ci/docker/run.sh b/src/ci/docker/run.sh
index 7087033e117a2..b2560c6b95b4c 100755
--- a/src/ci/docker/run.sh
+++ b/src/ci/docker/run.sh
@@ -36,12 +36,14 @@ elif [ -f "$docker_dir/disabled/$image/Dockerfile" ]; then
         echo Cannot run disabled images on travis!
         exit 1
     fi
-    retry docker \
+    # retry messes with the pipe from tar to docker. Not needed on non-travis
+    # Transform changes the context of disabled Dockerfiles to match the enabled ones
+    tar --transform 's#^./disabled/#./#' -C $docker_dir -c . | docker \
       build \
       --rm \
       -t rust-ci \
-      -f "$docker_dir/disabled/$image/Dockerfile" \
-      "$docker_dir"
+      -f "$image/Dockerfile" \
+      -
 else
     echo Invalid image: $image
     exit 1
diff --git a/src/doc/unstable-book/src/language-features/inclusive-range-syntax.md b/src/doc/unstable-book/src/language-features/inclusive-range-syntax.md
index 255445c318dca..56f58803150ca 100644
--- a/src/doc/unstable-book/src/language-features/inclusive-range-syntax.md
+++ b/src/doc/unstable-book/src/language-features/inclusive-range-syntax.md
@@ -7,13 +7,13 @@ The tracking issue for this feature is: [#28237]
 ------------------------
 
 To get a range that goes from 0 to 10 and includes the value 10, you
-can write `0...10`:
+can write `0..=10`:
 
 ```rust
 #![feature(inclusive_range_syntax)]
 
 fn main() {
-    for i in 0...10 {
+    for i in 0..=10 {
         println!("{}", i);
     }
 }
diff --git a/src/liballoc/tests/btree/map.rs b/src/liballoc/tests/btree/map.rs
index 2c899d96940ec..2393101040d9f 100644
--- a/src/liballoc/tests/btree/map.rs
+++ b/src/liballoc/tests/btree/map.rs
@@ -182,7 +182,7 @@ fn test_range_small() {
 fn test_range_inclusive() {
     let size = 500;
 
-    let map: BTreeMap<_, _> = (0...size).map(|i| (i, i)).collect();
+    let map: BTreeMap<_, _> = (0..=size).map(|i| (i, i)).collect();
 
     fn check<'a, L, R>(lhs: L, rhs: R)
         where L: IntoIterator<Item=(&'a i32, &'a i32)>,
@@ -193,18 +193,18 @@ fn test_range_inclusive() {
         assert_eq!(lhs, rhs);
     }
 
-    check(map.range(size + 1...size + 1), vec![]);
-    check(map.range(size...size), vec![(&size, &size)]);
-    check(map.range(size...size + 1), vec![(&size, &size)]);
-    check(map.range(0...0), vec![(&0, &0)]);
-    check(map.range(0...size - 1), map.range(..size));
-    check(map.range(-1...-1), vec![]);
-    check(map.range(-1...size), map.range(..));
-    check(map.range(...size), map.range(..));
-    check(map.range(...200), map.range(..201));
-    check(map.range(5...8), vec![(&5, &5), (&6, &6), (&7, &7), (&8, &8)]);
-    check(map.range(-1...0), vec![(&0, &0)]);
-    check(map.range(-1...2), vec![(&0, &0), (&1, &1), (&2, &2)]);
+    check(map.range(size + 1..=size + 1), vec![]);
+    check(map.range(size..=size), vec![(&size, &size)]);
+    check(map.range(size..=size + 1), vec![(&size, &size)]);
+    check(map.range(0..=0), vec![(&0, &0)]);
+    check(map.range(0..=size - 1), map.range(..size));
+    check(map.range(-1..=-1), vec![]);
+    check(map.range(-1..=size), map.range(..));
+    check(map.range(..=size), map.range(..));
+    check(map.range(..=200), map.range(..201));
+    check(map.range(5..=8), vec![(&5, &5), (&6, &6), (&7, &7), (&8, &8)]);
+    check(map.range(-1..=0), vec![(&0, &0)]);
+    check(map.range(-1..=2), vec![(&0, &0), (&1, &1), (&2, &2)]);
 }
 
 #[test]
@@ -212,7 +212,7 @@ fn test_range_inclusive_max_value() {
     let max = ::std::usize::MAX;
     let map: BTreeMap<_, _> = vec![(max, 0)].into_iter().collect();
 
-    assert_eq!(map.range(max...max).collect::<Vec<_>>(), &[(&max, &0)]);
+    assert_eq!(map.range(max..=max).collect::<Vec<_>>(), &[(&max, &0)]);
 }
 
 #[test]
diff --git a/src/liballoc/tests/str.rs b/src/liballoc/tests/str.rs
index 9d8ca38b20e48..b3178064505e8 100644
--- a/src/liballoc/tests/str.rs
+++ b/src/liballoc/tests/str.rs
@@ -361,13 +361,13 @@ fn test_slice_fail() {
 #[test]
 #[should_panic]
 fn test_str_slice_rangetoinclusive_max_panics() {
-    &"hello"[...usize::max_value()];
+    &"hello"[..=usize::max_value()];
 }
 
 #[test]
 #[should_panic]
 fn test_str_slice_rangeinclusive_max_panics() {
-    &"hello"[1...usize::max_value()];
+    &"hello"[1..=usize::max_value()];
 }
 
 #[test]
@@ -375,7 +375,7 @@ fn test_str_slice_rangeinclusive_max_panics() {
 fn test_str_slicemut_rangetoinclusive_max_panics() {
     let mut s = "hello".to_owned();
     let s: &mut str = &mut s;
-    &mut s[...usize::max_value()];
+    &mut s[..=usize::max_value()];
 }
 
 #[test]
@@ -383,7 +383,7 @@ fn test_str_slicemut_rangetoinclusive_max_panics() {
 fn test_str_slicemut_rangeinclusive_max_panics() {
     let mut s = "hello".to_owned();
     let s: &mut str = &mut s;
-    &mut s[1...usize::max_value()];
+    &mut s[1..=usize::max_value()];
 }
 
 #[test]
@@ -391,13 +391,13 @@ fn test_str_get_maxinclusive() {
     let mut s = "hello".to_owned();
     {
         let s: &str = &s;
-        assert_eq!(s.get(...usize::max_value()), None);
-        assert_eq!(s.get(1...usize::max_value()), None);
+        assert_eq!(s.get(..=usize::max_value()), None);
+        assert_eq!(s.get(1..=usize::max_value()), None);
     }
     {
         let s: &mut str = &mut s;
-        assert_eq!(s.get(...usize::max_value()), None);
-        assert_eq!(s.get(1...usize::max_value()), None);
+        assert_eq!(s.get(..=usize::max_value()), None);
+        assert_eq!(s.get(1..=usize::max_value()), None);
     }
 }
 
diff --git a/src/liballoc/tests/string.rs b/src/liballoc/tests/string.rs
index 6aba18ddf49ff..ef6f5e10a72de 100644
--- a/src/liballoc/tests/string.rs
+++ b/src/liballoc/tests/string.rs
@@ -456,9 +456,9 @@ fn test_splice_char_boundary() {
 #[test]
 fn test_splice_inclusive_range() {
     let mut v = String::from("12345");
-    v.splice(2...3, "789");
+    v.splice(2..=3, "789");
     assert_eq!(v, "127895");
-    v.splice(1...2, "A");
+    v.splice(1..=2, "A");
     assert_eq!(v, "1A895");
 }
 
@@ -473,7 +473,7 @@ fn test_splice_out_of_bounds() {
 #[should_panic]
 fn test_splice_inclusive_out_of_bounds() {
     let mut s = String::from("12345");
-    s.splice(5...5, "789");
+    s.splice(5..=5, "789");
 }
 
 #[test]
diff --git a/src/liballoc/tests/vec.rs b/src/liballoc/tests/vec.rs
index 670ea8089fc26..0e25da5bd3077 100644
--- a/src/liballoc/tests/vec.rs
+++ b/src/liballoc/tests/vec.rs
@@ -537,27 +537,27 @@ fn test_drain_range() {
 #[test]
 fn test_drain_inclusive_range() {
     let mut v = vec!['a', 'b', 'c', 'd', 'e'];
-    for _ in v.drain(1...3) {
+    for _ in v.drain(1..=3) {
     }
     assert_eq!(v, &['a', 'e']);
 
-    let mut v: Vec<_> = (0...5).map(|x| x.to_string()).collect();
-    for _ in v.drain(1...5) {
+    let mut v: Vec<_> = (0..=5).map(|x| x.to_string()).collect();
+    for _ in v.drain(1..=5) {
     }
     assert_eq!(v, &["0".to_string()]);
 
-    let mut v: Vec<String> = (0...5).map(|x| x.to_string()).collect();
-    for _ in v.drain(0...5) {
+    let mut v: Vec<String> = (0..=5).map(|x| x.to_string()).collect();
+    for _ in v.drain(0..=5) {
     }
     assert_eq!(v, Vec::<String>::new());
 
-    let mut v: Vec<_> = (0...5).map(|x| x.to_string()).collect();
-    for _ in v.drain(0...3) {
+    let mut v: Vec<_> = (0..=5).map(|x| x.to_string()).collect();
+    for _ in v.drain(0..=3) {
     }
     assert_eq!(v, &["4".to_string(), "5".to_string()]);
 
-    let mut v: Vec<_> = (0...1).map(|x| x.to_string()).collect();
-    for _ in v.drain(...0) {
+    let mut v: Vec<_> = (0..=1).map(|x| x.to_string()).collect();
+    for _ in v.drain(..=0) {
     }
     assert_eq!(v, &["1".to_string()]);
 }
@@ -572,7 +572,7 @@ fn test_drain_max_vec_size() {
 
     let mut v = Vec::<()>::with_capacity(usize::max_value());
     unsafe { v.set_len(usize::max_value()); }
-    for _ in v.drain(usize::max_value() - 1...usize::max_value() - 1) {
+    for _ in v.drain(usize::max_value() - 1..=usize::max_value() - 1) {
     }
     assert_eq!(v.len(), usize::max_value() - 1);
 }
@@ -581,7 +581,7 @@ fn test_drain_max_vec_size() {
 #[should_panic]
 fn test_drain_inclusive_out_of_bounds() {
     let mut v = vec![1, 2, 3, 4, 5];
-    v.drain(5...5);
+    v.drain(5..=5);
 }
 
 #[test]
@@ -598,10 +598,10 @@ fn test_splice() {
 fn test_splice_inclusive_range() {
     let mut v = vec![1, 2, 3, 4, 5];
     let a = [10, 11, 12];
-    let t1: Vec<_> = v.splice(2...3, a.iter().cloned()).collect();
+    let t1: Vec<_> = v.splice(2..=3, a.iter().cloned()).collect();
     assert_eq!(v, &[1, 2, 10, 11, 12, 5]);
     assert_eq!(t1, &[3, 4]);
-    let t2: Vec<_> = v.splice(1...2, Some(20)).collect();
+    let t2: Vec<_> = v.splice(1..=2, Some(20)).collect();
     assert_eq!(v, &[1, 20, 11, 12, 5]);
     assert_eq!(t2, &[2, 10]);
 }
@@ -619,7 +619,7 @@ fn test_splice_out_of_bounds() {
 fn test_splice_inclusive_out_of_bounds() {
     let mut v = vec![1, 2, 3, 4, 5];
     let a = [10, 11, 12];
-    v.splice(5...5, a.iter().cloned());
+    v.splice(5..=5, a.iter().cloned());
 }
 
 #[test]
diff --git a/src/liballoc/vec.rs b/src/liballoc/vec.rs
index 7dd8895c1ae4c..725d3e15f4a61 100644
--- a/src/liballoc/vec.rs
+++ b/src/liballoc/vec.rs
@@ -1950,7 +1950,7 @@ impl<T> Vec<T> {
     /// assert_eq!(u, &[1, 2]);
     /// ```
     #[inline]
-    #[stable(feature = "vec_splice", since = "1.22.0")]
+    #[stable(feature = "vec_splice", since = "1.21.0")]
     pub fn splice<R, I>(&mut self, range: R, replace_with: I) -> Splice<I::IntoIter>
         where R: RangeArgument<usize>, I: IntoIterator<Item=T>
     {
@@ -2553,13 +2553,13 @@ impl<'a, T> InPlace<T> for PlaceBack<'a, T> {
 /// [`splice()`]: struct.Vec.html#method.splice
 /// [`Vec`]: struct.Vec.html
 #[derive(Debug)]
-#[stable(feature = "vec_splice", since = "1.22.0")]
+#[stable(feature = "vec_splice", since = "1.21.0")]
 pub struct Splice<'a, I: Iterator + 'a> {
     drain: Drain<'a, I::Item>,
     replace_with: I,
 }
 
-#[stable(feature = "vec_splice", since = "1.22.0")]
+#[stable(feature = "vec_splice", since = "1.21.0")]
 impl<'a, I: Iterator> Iterator for Splice<'a, I> {
     type Item = I::Item;
 
@@ -2572,18 +2572,18 @@ impl<'a, I: Iterator> Iterator for Splice<'a, I> {
     }
 }
 
-#[stable(feature = "vec_splice", since = "1.22.0")]
+#[stable(feature = "vec_splice", since = "1.21.0")]
 impl<'a, I: Iterator> DoubleEndedIterator for Splice<'a, I> {
     fn next_back(&mut self) -> Option<Self::Item> {
         self.drain.next_back()
     }
 }
 
-#[stable(feature = "vec_splice", since = "1.22.0")]
+#[stable(feature = "vec_splice", since = "1.21.0")]
 impl<'a, I: Iterator> ExactSizeIterator for Splice<'a, I> {}
 
 
-#[stable(feature = "vec_splice", since = "1.22.0")]
+#[stable(feature = "vec_splice", since = "1.21.0")]
 impl<'a, I: Iterator> Drop for Splice<'a, I> {
     fn drop(&mut self) {
         // exhaust drain first
diff --git a/src/liballoc_jemalloc/Cargo.toml b/src/liballoc_jemalloc/Cargo.toml
index 94700cf447535..4042c4d2d4e02 100644
--- a/src/liballoc_jemalloc/Cargo.toml
+++ b/src/liballoc_jemalloc/Cargo.toml
@@ -19,7 +19,7 @@ libc = { path = "../rustc/libc_shim" }
 
 [build-dependencies]
 build_helper = { path = "../build_helper" }
-gcc = "0.3.50"
+cc = "1.0"
 
 [features]
 debug = []
diff --git a/src/liballoc_jemalloc/build.rs b/src/liballoc_jemalloc/build.rs
index d89d3bcdb62a5..7dd85ddcc7965 100644
--- a/src/liballoc_jemalloc/build.rs
+++ b/src/liballoc_jemalloc/build.rs
@@ -11,7 +11,7 @@
 #![deny(warnings)]
 
 extern crate build_helper;
-extern crate gcc;
+extern crate cc;
 
 use std::env;
 use std::path::PathBuf;
@@ -63,7 +63,7 @@ fn main() {
         _ => return,
     };
 
-    let compiler = gcc::Build::new().get_compiler();
+    let compiler = cc::Build::new().get_compiler();
     // only msvc returns None for ar so unwrap is okay
     let ar = build_helper::cc2ar(compiler.path(), &target).unwrap();
     let cflags = compiler.args()
@@ -150,7 +150,7 @@ fn main() {
     // sure the symbols are available.
     if target.contains("androideabi") {
         println!("cargo:rerun-if-changed=pthread_atfork_dummy.c");
-        gcc::Build::new()
+        cc::Build::new()
             .flag("-fvisibility=hidden")
             .file("pthread_atfork_dummy.c")
             .compile("libpthread_atfork_dummy.a");
diff --git a/src/libcore/benches/iter.rs b/src/libcore/benches/iter.rs
index 827c6354c60ba..1f16f5b1df3f3 100644
--- a/src/libcore/benches/iter.rs
+++ b/src/libcore/benches/iter.rs
@@ -147,40 +147,131 @@ fn bench_for_each_chain_ref_fold(b: &mut Bencher) {
     });
 }
 
-#[bench]
-fn bench_flat_map_sum(b: &mut Bencher) {
-    b.iter(|| -> i64 {
-        (0i64..1000).flat_map(|x| x..x+1000)
-            .map(black_box)
-            .sum()
-    });
+
+/// Helper to benchmark `sum` for iterators taken by value which
+/// can optimize `fold`, and by reference which cannot.
+macro_rules! bench_sums {
+    ($bench_sum:ident, $bench_ref_sum:ident, $iter:expr) => {
+        #[bench]
+        fn $bench_sum(b: &mut Bencher) {
+            b.iter(|| -> i64 {
+                $iter.map(black_box).sum()
+            });
+        }
+
+        #[bench]
+        fn $bench_ref_sum(b: &mut Bencher) {
+            b.iter(|| -> i64 {
+                $iter.map(black_box).by_ref().sum()
+            });
+        }
+    }
 }
 
-#[bench]
-fn bench_flat_map_ref_sum(b: &mut Bencher) {
-    b.iter(|| -> i64 {
-        (0i64..1000).flat_map(|x| x..x+1000)
-            .map(black_box)
-            .by_ref()
-            .sum()
-    });
+bench_sums! {
+    bench_flat_map_sum,
+    bench_flat_map_ref_sum,
+    (0i64..1000).flat_map(|x| x..x+1000)
 }
 
-#[bench]
-fn bench_flat_map_chain_sum(b: &mut Bencher) {
-    b.iter(|| -> i64 {
-        (0i64..1000000).flat_map(|x| once(x).chain(once(x)))
-            .map(black_box)
-            .sum()
-    });
+bench_sums! {
+    bench_flat_map_chain_sum,
+    bench_flat_map_chain_ref_sum,
+    (0i64..1000000).flat_map(|x| once(x).chain(once(x)))
 }
 
-#[bench]
-fn bench_flat_map_chain_ref_sum(b: &mut Bencher) {
-    b.iter(|| -> i64 {
-        (0i64..1000000).flat_map(|x| once(x).chain(once(x)))
-            .map(black_box)
-            .by_ref()
-            .sum()
-    });
+bench_sums! {
+    bench_enumerate_sum,
+    bench_enumerate_ref_sum,
+    (0i64..1000000).enumerate().map(|(i, x)| x * i as i64)
+}
+
+bench_sums! {
+    bench_enumerate_chain_sum,
+    bench_enumerate_chain_ref_sum,
+    (0i64..1000000).chain(0..1000000).enumerate().map(|(i, x)| x * i as i64)
+}
+
+bench_sums! {
+    bench_filter_sum,
+    bench_filter_ref_sum,
+    (0i64..1000000).filter(|x| x % 2 == 0)
+}
+
+bench_sums! {
+    bench_filter_chain_sum,
+    bench_filter_chain_ref_sum,
+    (0i64..1000000).chain(0..1000000).filter(|x| x % 2 == 0)
+}
+
+bench_sums! {
+    bench_filter_map_sum,
+    bench_filter_map_ref_sum,
+    (0i64..1000000).filter_map(|x| x.checked_mul(x))
+}
+
+bench_sums! {
+    bench_filter_map_chain_sum,
+    bench_filter_map_chain_ref_sum,
+    (0i64..1000000).chain(0..1000000).filter_map(|x| x.checked_mul(x))
+}
+
+bench_sums! {
+    bench_fuse_sum,
+    bench_fuse_ref_sum,
+    (0i64..1000000).fuse()
+}
+
+bench_sums! {
+    bench_fuse_chain_sum,
+    bench_fuse_chain_ref_sum,
+    (0i64..1000000).chain(0..1000000).fuse()
+}
+
+bench_sums! {
+    bench_inspect_sum,
+    bench_inspect_ref_sum,
+    (0i64..1000000).inspect(|_| {})
+}
+
+bench_sums! {
+    bench_inspect_chain_sum,
+    bench_inspect_chain_ref_sum,
+    (0i64..1000000).chain(0..1000000).inspect(|_| {})
+}
+
+bench_sums! {
+    bench_peekable_sum,
+    bench_peekable_ref_sum,
+    (0i64..1000000).peekable()
+}
+
+bench_sums! {
+    bench_peekable_chain_sum,
+    bench_peekable_chain_ref_sum,
+    (0i64..1000000).chain(0..1000000).peekable()
+}
+
+bench_sums! {
+    bench_skip_sum,
+    bench_skip_ref_sum,
+    (0i64..1000000).skip(1000)
+}
+
+bench_sums! {
+    bench_skip_chain_sum,
+    bench_skip_chain_ref_sum,
+    (0i64..1000000).chain(0..1000000).skip(1000)
+}
+
+bench_sums! {
+    bench_skip_while_sum,
+    bench_skip_while_ref_sum,
+    (0i64..1000000).skip_while(|&x| x < 1000)
+}
+
+bench_sums! {
+    bench_skip_while_chain_sum,
+    bench_skip_while_chain_ref_sum,
+    (0i64..1000000).chain(0..1000000).skip_while(|&x| x < 1000)
 }
diff --git a/src/libcore/cmp.rs b/src/libcore/cmp.rs
index 6f86f8caad073..e012cbd76ff91 100644
--- a/src/libcore/cmp.rs
+++ b/src/libcore/cmp.rs
@@ -456,7 +456,7 @@ pub trait Ord: Eq + PartialOrd<Self> {
     /// assert_eq!(2, 1.max(2));
     /// assert_eq!(2, 2.max(2));
     /// ```
-    #[stable(feature = "ord_max_min", since = "1.22.0")]
+    #[stable(feature = "ord_max_min", since = "1.21.0")]
     fn max(self, other: Self) -> Self
     where Self: Sized {
         if other >= self { other } else { self }
@@ -472,7 +472,7 @@ pub trait Ord: Eq + PartialOrd<Self> {
     /// assert_eq!(1, 1.min(2));
     /// assert_eq!(2, 2.min(2));
     /// ```
-    #[stable(feature = "ord_max_min", since = "1.22.0")]
+    #[stable(feature = "ord_max_min", since = "1.21.0")]
     fn min(self, other: Self) -> Self
     where Self: Sized {
         if self <= other { self } else { other }
diff --git a/src/libcore/convert.rs b/src/libcore/convert.rs
index 6f3c3863fae1d..e815d72d36646 100644
--- a/src/libcore/convert.rs
+++ b/src/libcore/convert.rs
@@ -48,8 +48,25 @@
 
 #![stable(feature = "rust1", since = "1.0.0")]
 
-use str::FromStr;
+use fmt;
 
+/// A type used as the error type for implementations of fallible conversion
+/// traits in cases where conversions cannot actually fail.
+///
+/// Because `Infallible` has no variants, a value of this type can never exist.
+/// It is used only to satisfy trait signatures that expect an error type, and
+/// signals to both the compiler and the user that the error case is impossible.
+#[unstable(feature = "try_from", issue = "33417")]
+#[derive(Clone, Copy, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
+pub enum Infallible {}
+
+#[unstable(feature = "try_from", issue = "33417")]
+impl fmt::Display for Infallible {
+    fn fmt(&self, _: &mut fmt::Formatter) -> fmt::Result {
+        match *self {
+        }
+    }
+}
 /// A cheap reference-to-reference conversion. Used to convert a value to a
 /// reference value within generic code.
 ///
@@ -417,6 +434,17 @@ impl<T, U> TryInto<U> for T where U: TryFrom<T>
     }
 }
 
+// Infallible conversions are semantically equivalent to fallible conversions
+// with an uninhabited error type.
+#[unstable(feature = "try_from", issue = "33417")]
+impl<T, U> TryFrom<U> for T where T: From<U> {
+    type Error = Infallible;
+
+    fn try_from(value: U) -> Result<Self, Self::Error> {
+        Ok(T::from(value))
+    }
+}
+
 ////////////////////////////////////////////////////////////////////////////////
 // CONCRETE IMPLS
 ////////////////////////////////////////////////////////////////////////////////
@@ -442,14 +470,3 @@ impl AsRef<str> for str {
         self
     }
 }
-
-// FromStr implies TryFrom<&str>
-#[unstable(feature = "try_from", issue = "33417")]
-impl<'a, T> TryFrom<&'a str> for T where T: FromStr
-{
-    type Error = <T as FromStr>::Err;
-
-    fn try_from(s: &'a str) -> Result<T, Self::Error> {
-        FromStr::from_str(s)
-    }
-}
diff --git a/src/libcore/fmt/mod.rs b/src/libcore/fmt/mod.rs
index b84a1deb61144..6c251b9eb0924 100644
--- a/src/libcore/fmt/mod.rs
+++ b/src/libcore/fmt/mod.rs
@@ -488,13 +488,14 @@ impl<'a> Display for Arguments<'a> {
 /// The origin is: Point { x: 0, y: 0 }
 /// ```
 ///
-/// There are a number of `debug_*` methods on `Formatter` to help you with manual
+/// There are a number of `debug_*` methods on [`Formatter`] to help you with manual
 /// implementations, such as [`debug_struct`][debug_struct].
 ///
 /// `Debug` implementations using either `derive` or the debug builder API
-/// on `Formatter` support pretty printing using the alternate flag: `{:#?}`.
+/// on [`Formatter`] support pretty printing using the alternate flag: `{:#?}`.
 ///
 /// [debug_struct]: ../../std/fmt/struct.Formatter.html#method.debug_struct
+/// [`Formatter`]: ../../std/fmt/struct.Formatter.html
 ///
 /// Pretty printing with `#?`:
 ///
@@ -1321,8 +1322,11 @@ impl<'a> Formatter<'a> {
         self.flags & (1 << FlagV1::SignAwareZeroPad as u32) != 0
     }
 
-    /// Creates a `DebugStruct` builder designed to assist with creation of
-    /// `fmt::Debug` implementations for structs.
+    /// Creates a [`DebugStruct`] builder designed to assist with creation of
+    /// [`fmt::Debug`] implementations for structs.
+    ///
+    /// [`DebugStruct`]: ../../std/fmt/struct.DebugStruct.html
+    /// [`fmt::Debug`]: ../../std/fmt/trait.Debug.html
     ///
     /// # Examples
     ///
diff --git a/src/libcore/internal_macros.rs b/src/libcore/internal_macros.rs
index 9a7914064fdd5..cb215a38e5356 100644
--- a/src/libcore/internal_macros.rs
+++ b/src/libcore/internal_macros.rs
@@ -68,3 +68,22 @@ macro_rules! forward_ref_binop {
         }
     }
 }
+
+// implements "T op= &U", based on "T op= U"
+// where U is expected to be `Copy`able
+macro_rules! forward_ref_op_assign {
+    (impl $imp:ident, $method:ident for $t:ty, $u:ty) => {
+        forward_ref_op_assign!(impl $imp, $method for $t, $u,
+                #[stable(feature = "op_assign_builtins_by_ref", since = "1.22.0")]);
+    };
+    (impl $imp:ident, $method:ident for $t:ty, $u:ty, #[$attr:meta]) => {
+        #[$attr]
+        impl<'a> $imp<&'a $u> for $t {
+            #[inline]
+            fn $method(&mut self, other: &'a $u) {
+                $imp::$method(self, *other);
+            }
+        }
+    }
+}
+
diff --git a/src/libcore/iter/iterator.rs b/src/libcore/iter/iterator.rs
index 36bf9633b4a35..e9e31065cf876 100644
--- a/src/libcore/iter/iterator.rs
+++ b/src/libcore/iter/iterator.rs
@@ -518,7 +518,7 @@ pub trait Iterator {
     ///       .for_each(|(i, x)| println!("{}:{}", i, x));
     /// ```
     #[inline]
-    #[stable(feature = "iterator_for_each", since = "1.22.0")]
+    #[stable(feature = "iterator_for_each", since = "1.21.0")]
     fn for_each<F>(self, mut f: F) where
         Self: Sized, F: FnMut(Self::Item),
     {
diff --git a/src/libcore/iter/mod.rs b/src/libcore/iter/mod.rs
index 7907f2fd66126..8d2521b053eb5 100644
--- a/src/libcore/iter/mod.rs
+++ b/src/libcore/iter/mod.rs
@@ -488,7 +488,7 @@ impl<'a, I, T: 'a> FusedIterator for Cloned<I>
 {}
 
 #[doc(hidden)]
-unsafe impl<'a, I, T: 'a> TrustedRandomAccess for Cloned<I>
+default unsafe impl<'a, I, T: 'a> TrustedRandomAccess for Cloned<I>
     where I: TrustedRandomAccess<Item=&'a T>, T: Clone
 {
     unsafe fn get_unchecked(&mut self, i: usize) -> Self::Item {
@@ -499,6 +499,18 @@ unsafe impl<'a, I, T: 'a> TrustedRandomAccess for Cloned<I>
     fn may_have_side_effect() -> bool { true }
 }
 
+#[doc(hidden)]
+unsafe impl<'a, I, T: 'a> TrustedRandomAccess for Cloned<I>
+    where I: TrustedRandomAccess<Item=&'a T>, T: Copy
+{
+    unsafe fn get_unchecked(&mut self, i: usize) -> Self::Item {
+        *self.it.get_unchecked(i)
+    }
+
+    #[inline]
+    fn may_have_side_effect() -> bool { false }
+}
+
 #[unstable(feature = "trusted_len", issue = "37572")]
 unsafe impl<'a, I, T: 'a> TrustedLen for Cloned<I>
     where I: TrustedLen<Item=&'a T>,
@@ -546,7 +558,7 @@ impl<I> Iterator for Cycle<I> where I: Clone + Iterator {
 #[unstable(feature = "fused", issue = "35602")]
 impl<I> FusedIterator for Cycle<I> where I: Clone + Iterator {}
 
-/// An adapter for stepping iterators by a custom amount.
+/// An iterator for stepping iterators by a custom amount.
 ///
 /// This `struct` is created by the [`step_by`] method on [`Iterator`]. See
 /// its documentation for more.
@@ -1238,6 +1250,18 @@ impl<I: Iterator, P> Iterator for Filter<I, P> where P: FnMut(&I::Item) -> bool
         }
         count
     }
+
+    #[inline]
+    fn fold<Acc, Fold>(self, init: Acc, mut fold: Fold) -> Acc
+        where Fold: FnMut(Acc, Self::Item) -> Acc,
+    {
+        let mut predicate = self.predicate;
+        self.iter.fold(init, move |acc, item| if predicate(&item) {
+            fold(acc, item)
+        } else {
+            acc
+        })
+    }
 }
 
 #[stable(feature = "rust1", since = "1.0.0")]
@@ -1253,6 +1277,18 @@ impl<I: DoubleEndedIterator, P> DoubleEndedIterator for Filter<I, P>
         }
         None
     }
+
+    #[inline]
+    fn rfold<Acc, Fold>(self, init: Acc, mut fold: Fold) -> Acc
+        where Fold: FnMut(Acc, Self::Item) -> Acc,
+    {
+        let mut predicate = self.predicate;
+        self.iter.rfold(init, move |acc, item| if predicate(&item) {
+            fold(acc, item)
+        } else {
+            acc
+        })
+    }
 }
 
 #[unstable(feature = "fused", issue = "35602")]
@@ -1304,6 +1340,17 @@ impl<B, I: Iterator, F> Iterator for FilterMap<I, F>
         let (_, upper) = self.iter.size_hint();
         (0, upper) // can't know a lower bound, due to the predicate
     }
+
+    #[inline]
+    fn fold<Acc, Fold>(self, init: Acc, mut fold: Fold) -> Acc
+        where Fold: FnMut(Acc, Self::Item) -> Acc,
+    {
+        let mut f = self.f;
+        self.iter.fold(init, move |acc, item| match f(item) {
+            Some(x) => fold(acc, x),
+            None => acc,
+        })
+    }
 }
 
 #[stable(feature = "rust1", since = "1.0.0")]
@@ -1319,6 +1366,17 @@ impl<B, I: DoubleEndedIterator, F> DoubleEndedIterator for FilterMap<I, F>
         }
         None
     }
+
+    #[inline]
+    fn rfold<Acc, Fold>(self, init: Acc, mut fold: Fold) -> Acc
+        where Fold: FnMut(Acc, Self::Item) -> Acc,
+    {
+        let mut f = self.f;
+        self.iter.rfold(init, move |acc, item| match f(item) {
+            Some(x) => fold(acc, x),
+            None => acc,
+        })
+    }
 }
 
 #[unstable(feature = "fused", issue = "35602")]
@@ -1383,6 +1441,19 @@ impl<I> Iterator for Enumerate<I> where I: Iterator {
     fn count(self) -> usize {
         self.iter.count()
     }
+
+    #[inline]
+    #[rustc_inherit_overflow_checks]
+    fn fold<Acc, Fold>(self, init: Acc, mut fold: Fold) -> Acc
+        where Fold: FnMut(Acc, Self::Item) -> Acc,
+    {
+        let mut count = self.count;
+        self.iter.fold(init, move |acc, item| {
+            let acc = fold(acc, (count, item));
+            count += 1;
+            acc
+        })
+    }
 }
 
 #[stable(feature = "rust1", since = "1.0.0")]
@@ -1398,6 +1469,19 @@ impl<I> DoubleEndedIterator for Enumerate<I> where
             (self.count + len, a)
         })
     }
+
+    #[inline]
+    fn rfold<Acc, Fold>(self, init: Acc, mut fold: Fold) -> Acc
+        where Fold: FnMut(Acc, Self::Item) -> Acc,
+    {
+        // Can safely add and subtract the count, as `ExactSizeIterator` promises
+        // that the number of elements fits into a `usize`.
+        let mut count = self.count + self.iter.len();
+        self.iter.rfold(init, move |acc, item| {
+            count -= 1;
+            fold(acc, (count, item))
+        })
+    }
 }
 
 #[stable(feature = "rust1", since = "1.0.0")]
@@ -1509,6 +1593,18 @@ impl<I: Iterator> Iterator for Peekable<I> {
         let hi = hi.and_then(|x| x.checked_add(peek_len));
         (lo, hi)
     }
+
+    #[inline]
+    fn fold<Acc, Fold>(self, init: Acc, mut fold: Fold) -> Acc
+        where Fold: FnMut(Acc, Self::Item) -> Acc,
+    {
+        let acc = match self.peeked {
+            Some(None) => return init,
+            Some(Some(v)) => fold(init, v),
+            None => init,
+        };
+        self.iter.fold(acc, fold)
+    }
 }
 
 #[stable(feature = "rust1", since = "1.0.0")]
@@ -1617,6 +1713,19 @@ impl<I: Iterator, P> Iterator for SkipWhile<I, P>
         let (_, upper) = self.iter.size_hint();
         (0, upper) // can't know a lower bound, due to the predicate
     }
+
+    #[inline]
+    fn fold<Acc, Fold>(mut self, mut init: Acc, mut fold: Fold) -> Acc
+        where Fold: FnMut(Acc, Self::Item) -> Acc,
+    {
+        if !self.flag {
+            match self.next() {
+                Some(v) => init = fold(init, v),
+                None => return init,
+            }
+        }
+        self.iter.fold(init, fold)
+    }
 }
 
 #[unstable(feature = "fused", issue = "35602")]
@@ -1757,6 +1866,19 @@ impl<I> Iterator for Skip<I> where I: Iterator {
 
         (lower, upper)
     }
+
+    #[inline]
+    fn fold<Acc, Fold>(mut self, init: Acc, fold: Fold) -> Acc
+        where Fold: FnMut(Acc, Self::Item) -> Acc,
+    {
+        if self.n > 0 {
+            // nth(n) skips n+1
+            if self.iter.nth(self.n - 1).is_none() {
+                return init;
+            }
+        }
+        self.iter.fold(init, fold)
+    }
 }
 
 #[stable(feature = "rust1", since = "1.0.0")]
@@ -1979,6 +2101,16 @@ impl<I: DoubleEndedIterator, U, F> DoubleEndedIterator for FlatMap<I, U, F> wher
             }
         }
     }
+
+    #[inline]
+    fn rfold<Acc, Fold>(self, init: Acc, mut fold: Fold) -> Acc
+        where Fold: FnMut(Acc, Self::Item) -> Acc,
+    {
+        self.frontiter.into_iter()
+            .chain(self.iter.map(self.f).map(U::into_iter))
+            .chain(self.backiter)
+            .rfold(init, |acc, iter| iter.rfold(acc, &mut fold))
+    }
 }
 
 #[unstable(feature = "fused", issue = "35602")]
@@ -2056,6 +2188,17 @@ impl<I> Iterator for Fuse<I> where I: Iterator {
             self.iter.size_hint()
         }
     }
+
+    #[inline]
+    default fn fold<Acc, Fold>(self, init: Acc, fold: Fold) -> Acc
+        where Fold: FnMut(Acc, Self::Item) -> Acc,
+    {
+        if self.done {
+            init
+        } else {
+            self.iter.fold(init, fold)
+        }
+    }
 }
 
 #[stable(feature = "rust1", since = "1.0.0")]
@@ -2070,6 +2213,17 @@ impl<I> DoubleEndedIterator for Fuse<I> where I: DoubleEndedIterator {
             next
         }
     }
+
+    #[inline]
+    default fn rfold<Acc, Fold>(self, init: Acc, fold: Fold) -> Acc
+        where Fold: FnMut(Acc, Self::Item) -> Acc,
+    {
+        if self.done {
+            init
+        } else {
+            self.iter.rfold(init, fold)
+        }
+    }
 }
 
 unsafe impl<I> TrustedRandomAccess for Fuse<I>
@@ -2110,6 +2264,13 @@ impl<I> Iterator for Fuse<I> where I: FusedIterator {
     fn size_hint(&self) -> (usize, Option<usize>) {
         self.iter.size_hint()
     }
+
+    #[inline]
+    fn fold<Acc, Fold>(self, init: Acc, fold: Fold) -> Acc
+        where Fold: FnMut(Acc, Self::Item) -> Acc,
+    {
+        self.iter.fold(init, fold)
+    }
 }
 
 #[unstable(feature = "fused", reason = "recently added", issue = "35602")]
@@ -2120,6 +2281,13 @@ impl<I> DoubleEndedIterator for Fuse<I>
     fn next_back(&mut self) -> Option<<I as Iterator>::Item> {
         self.iter.next_back()
     }
+
+    #[inline]
+    fn rfold<Acc, Fold>(self, init: Acc, fold: Fold) -> Acc
+        where Fold: FnMut(Acc, Self::Item) -> Acc,
+    {
+        self.iter.rfold(init, fold)
+    }
 }
 
 
@@ -2184,6 +2352,14 @@ impl<I: Iterator, F> Iterator for Inspect<I, F> where F: FnMut(&I::Item) {
     fn size_hint(&self) -> (usize, Option<usize>) {
         self.iter.size_hint()
     }
+
+    #[inline]
+    fn fold<Acc, Fold>(self, init: Acc, mut fold: Fold) -> Acc
+        where Fold: FnMut(Acc, Self::Item) -> Acc,
+    {
+        let mut f = self.f;
+        self.iter.fold(init, move |acc, item| { f(&item); fold(acc, item) })
+    }
 }
 
 #[stable(feature = "rust1", since = "1.0.0")]
@@ -2195,6 +2371,14 @@ impl<I: DoubleEndedIterator, F> DoubleEndedIterator for Inspect<I, F>
         let next = self.iter.next_back();
         self.do_inspect(next)
     }
+
+    #[inline]
+    fn rfold<Acc, Fold>(self, init: Acc, mut fold: Fold) -> Acc
+        where Fold: FnMut(Acc, Self::Item) -> Acc,
+    {
+        let mut f = self.f;
+        self.iter.rfold(init, move |acc, item| { f(&item); fold(acc, item) })
+    }
 }
 
 #[stable(feature = "rust1", since = "1.0.0")]
diff --git a/src/libcore/iter/range.rs b/src/libcore/iter/range.rs
index 73d518b570a11..e9aee4a4676de 100644
--- a/src/libcore/iter/range.rs
+++ b/src/libcore/iter/range.rs
@@ -89,6 +89,7 @@ macro_rules! step_impl_unsigned {
             }
 
             #[inline]
+            #[allow(unreachable_patterns)]
             fn add_usize(&self, n: usize) -> Option<Self> {
                 match <$t>::try_from(n) {
                     Ok(n_as_t) => self.checked_add(n_as_t),
@@ -120,6 +121,7 @@ macro_rules! step_impl_signed {
             }
 
             #[inline]
+            #[allow(unreachable_patterns)]
             fn add_usize(&self, n: usize) -> Option<Self> {
                 match <$unsigned>::try_from(n) {
                     Ok(n_as_unsigned) => {
diff --git a/src/libcore/marker.rs b/src/libcore/marker.rs
index e8fd729b638be..f56a9a4033298 100644
--- a/src/libcore/marker.rs
+++ b/src/libcore/marker.rs
@@ -122,7 +122,7 @@ pub trait Sized {
 /// [RFC982]: https://github.com/rust-lang/rfcs/blob/master/text/0982-dst-coercion.md
 /// [nomicon-coerce]: ../../nomicon/coercions.html
 #[unstable(feature = "unsize", issue = "27732")]
-#[lang="unsize"]
+#[lang = "unsize"]
 pub trait Unsize<T: ?Sized> {
     // Empty.
 }
diff --git a/src/libcore/mem.rs b/src/libcore/mem.rs
index 669b93120cf45..c869054cee81a 100644
--- a/src/libcore/mem.rs
+++ b/src/libcore/mem.rs
@@ -402,7 +402,7 @@ pub fn align_of_val<T: ?Sized>(val: &T) -> usize {
 /// }
 /// ```
 #[inline]
-#[stable(feature = "needs_drop", since = "1.22.0")]
+#[stable(feature = "needs_drop", since = "1.21.0")]
 pub fn needs_drop<T>() -> bool {
     unsafe { intrinsics::needs_drop::<T>() }
 }
diff --git a/src/libcore/num/mod.rs b/src/libcore/num/mod.rs
index bf31deae7a625..85be8a08728e5 100644
--- a/src/libcore/num/mod.rs
+++ b/src/libcore/num/mod.rs
@@ -12,7 +12,7 @@
 
 #![stable(feature = "rust1", since = "1.0.0")]
 
-use convert::TryFrom;
+use convert::{Infallible, TryFrom};
 use fmt;
 use intrinsics;
 use str::FromStr;
@@ -2507,16 +2507,24 @@ impl fmt::Display for TryFromIntError {
     }
 }
 
+#[unstable(feature = "try_from", issue = "33417")]
+impl From<Infallible> for TryFromIntError {
+    fn from(infallible: Infallible) -> TryFromIntError {
+        match infallible {
+        }
+    }
+}
+
 // no possible bounds violation
 macro_rules! try_from_unbounded {
     ($source:ty, $($target:ty),*) => {$(
         #[unstable(feature = "try_from", issue = "33417")]
         impl TryFrom<$source> for $target {
-            type Error = TryFromIntError;
+            type Error = Infallible;
 
             #[inline]
-            fn try_from(u: $source) -> Result<$target, TryFromIntError> {
-                Ok(u as $target)
+            fn try_from(value: $source) -> Result<Self, Self::Error> {
+                Ok(value as $target)
             }
         }
     )*}
@@ -2588,31 +2596,17 @@ macro_rules! rev {
 }
 
 /// intra-sign conversions
-try_from_unbounded!(u8, u8, u16, u32, u64, u128);
-try_from_unbounded!(u16, u16, u32, u64, u128);
-try_from_unbounded!(u32, u32, u64, u128);
-try_from_unbounded!(u64, u64, u128);
-try_from_unbounded!(u128, u128);
 try_from_upper_bounded!(u16, u8);
 try_from_upper_bounded!(u32, u16, u8);
 try_from_upper_bounded!(u64, u32, u16, u8);
 try_from_upper_bounded!(u128, u64, u32, u16, u8);
 
-try_from_unbounded!(i8, i8, i16, i32, i64, i128);
-try_from_unbounded!(i16, i16, i32, i64, i128);
-try_from_unbounded!(i32, i32, i64, i128);
-try_from_unbounded!(i64, i64, i128);
-try_from_unbounded!(i128, i128);
 try_from_both_bounded!(i16, i8);
 try_from_both_bounded!(i32, i16, i8);
 try_from_both_bounded!(i64, i32, i16, i8);
 try_from_both_bounded!(i128, i64, i32, i16, i8);
 
 // unsigned-to-signed
-try_from_unbounded!(u8, i16, i32, i64, i128);
-try_from_unbounded!(u16, i32, i64, i128);
-try_from_unbounded!(u32, i64, i128);
-try_from_unbounded!(u64, i128);
 try_from_upper_bounded!(u8, i8);
 try_from_upper_bounded!(u16, i8, i16);
 try_from_upper_bounded!(u32, i8, i16, i32);
@@ -2631,15 +2625,13 @@ try_from_both_bounded!(i64, u32, u16, u8);
 try_from_both_bounded!(i128, u64, u32, u16, u8);
 
 // usize/isize
-try_from_unbounded!(usize, usize);
 try_from_upper_bounded!(usize, isize);
 try_from_lower_bounded!(isize, usize);
-try_from_unbounded!(isize, isize);
 
 #[cfg(target_pointer_width = "16")]
 mod ptr_try_from_impls {
     use super::TryFromIntError;
-    use convert::TryFrom;
+    use convert::{Infallible, TryFrom};
 
     try_from_upper_bounded!(usize, u8);
     try_from_unbounded!(usize, u16, u32, u64, u128);
@@ -2651,21 +2643,21 @@ mod ptr_try_from_impls {
     try_from_both_bounded!(isize, i8);
     try_from_unbounded!(isize, i16, i32, i64, i128);
 
-    rev!(try_from_unbounded, usize, u8, u16);
+    rev!(try_from_unbounded, usize, u16);
     rev!(try_from_upper_bounded, usize, u32, u64, u128);
     rev!(try_from_lower_bounded, usize, i8, i16);
     rev!(try_from_both_bounded, usize, i32, i64, i128);
 
     rev!(try_from_unbounded, isize, u8);
     rev!(try_from_upper_bounded, isize, u16, u32, u64, u128);
-    rev!(try_from_unbounded, isize, i8, i16);
+    rev!(try_from_unbounded, isize, i16);
     rev!(try_from_both_bounded, isize, i32, i64, i128);
 }
 
 #[cfg(target_pointer_width = "32")]
 mod ptr_try_from_impls {
     use super::TryFromIntError;
-    use convert::TryFrom;
+    use convert::{Infallible, TryFrom};
 
     try_from_upper_bounded!(usize, u8, u16);
     try_from_unbounded!(usize, u32, u64, u128);
@@ -2677,21 +2669,21 @@ mod ptr_try_from_impls {
     try_from_both_bounded!(isize, i8, i16);
     try_from_unbounded!(isize, i32, i64, i128);
 
-    rev!(try_from_unbounded, usize, u8, u16, u32);
+    rev!(try_from_unbounded, usize, u16, u32);
     rev!(try_from_upper_bounded, usize, u64, u128);
     rev!(try_from_lower_bounded, usize, i8, i16, i32);
     rev!(try_from_both_bounded, usize, i64, i128);
 
     rev!(try_from_unbounded, isize, u8, u16);
     rev!(try_from_upper_bounded, isize, u32, u64, u128);
-    rev!(try_from_unbounded, isize, i8, i16, i32);
+    rev!(try_from_unbounded, isize, i16, i32);
     rev!(try_from_both_bounded, isize, i64, i128);
 }
 
 #[cfg(target_pointer_width = "64")]
 mod ptr_try_from_impls {
     use super::TryFromIntError;
-    use convert::TryFrom;
+    use convert::{Infallible, TryFrom};
 
     try_from_upper_bounded!(usize, u8, u16, u32);
     try_from_unbounded!(usize, u64, u128);
@@ -2703,14 +2695,14 @@ mod ptr_try_from_impls {
     try_from_both_bounded!(isize, i8, i16, i32);
     try_from_unbounded!(isize, i64, i128);
 
-    rev!(try_from_unbounded, usize, u8, u16, u32, u64);
+    rev!(try_from_unbounded, usize, u16, u32, u64);
     rev!(try_from_upper_bounded, usize, u128);
     rev!(try_from_lower_bounded, usize, i8, i16, i32, i64);
     rev!(try_from_both_bounded, usize, i128);
 
     rev!(try_from_unbounded, isize, u8, u16, u32);
     rev!(try_from_upper_bounded, isize, u64, u128);
-    rev!(try_from_unbounded, isize, i8, i16, i32, i64);
+    rev!(try_from_unbounded, isize, i16, i32, i64);
     rev!(try_from_both_bounded, isize, i128);
 }
 
diff --git a/src/libcore/num/wrapping.rs b/src/libcore/num/wrapping.rs
index acdf685e850ab..ae1b0b3ce11b2 100644
--- a/src/libcore/num/wrapping.rs
+++ b/src/libcore/num/wrapping.rs
@@ -36,6 +36,7 @@ macro_rules! sh_impl_signed {
                 *self = *self << other;
             }
         }
+        forward_ref_op_assign! { impl ShlAssign, shl_assign for Wrapping<$t>, $f }
 
         #[stable(feature = "rust1", since = "1.0.0")]
         impl Shr<$f> for Wrapping<$t> {
@@ -58,6 +59,7 @@ macro_rules! sh_impl_signed {
                 *self = *self >> other;
             }
         }
+        forward_ref_op_assign! { impl ShrAssign, shr_assign for Wrapping<$t>, $f }
     )
 }
 
@@ -80,6 +82,7 @@ macro_rules! sh_impl_unsigned {
                 *self = *self << other;
             }
         }
+        forward_ref_op_assign! { impl ShlAssign, shl_assign for Wrapping<$t>, $f }
 
         #[stable(feature = "rust1", since = "1.0.0")]
         impl Shr<$f> for Wrapping<$t> {
@@ -98,6 +101,7 @@ macro_rules! sh_impl_unsigned {
                 *self = *self >> other;
             }
         }
+        forward_ref_op_assign! { impl ShrAssign, shr_assign for Wrapping<$t>, $f }
     )
 }
 
@@ -142,6 +146,7 @@ macro_rules! wrapping_impl {
                 *self = *self + other;
             }
         }
+        forward_ref_op_assign! { impl AddAssign, add_assign for Wrapping<$t>, Wrapping<$t> }
 
         #[stable(feature = "rust1", since = "1.0.0")]
         impl Sub for Wrapping<$t> {
@@ -162,6 +167,7 @@ macro_rules! wrapping_impl {
                 *self = *self - other;
             }
         }
+        forward_ref_op_assign! { impl SubAssign, sub_assign for Wrapping<$t>, Wrapping<$t> }
 
         #[stable(feature = "rust1", since = "1.0.0")]
         impl Mul for Wrapping<$t> {
@@ -182,6 +188,7 @@ macro_rules! wrapping_impl {
                 *self = *self * other;
             }
         }
+        forward_ref_op_assign! { impl MulAssign, mul_assign for Wrapping<$t>, Wrapping<$t> }
 
         #[stable(feature = "wrapping_div", since = "1.3.0")]
         impl Div for Wrapping<$t> {
@@ -202,6 +209,7 @@ macro_rules! wrapping_impl {
                 *self = *self / other;
             }
         }
+        forward_ref_op_assign! { impl DivAssign, div_assign for Wrapping<$t>, Wrapping<$t> }
 
         #[stable(feature = "wrapping_impls", since = "1.7.0")]
         impl Rem for Wrapping<$t> {
@@ -222,6 +230,7 @@ macro_rules! wrapping_impl {
                 *self = *self % other;
             }
         }
+        forward_ref_op_assign! { impl RemAssign, rem_assign for Wrapping<$t>, Wrapping<$t> }
 
         #[stable(feature = "rust1", since = "1.0.0")]
         impl Not for Wrapping<$t> {
@@ -254,6 +263,7 @@ macro_rules! wrapping_impl {
                 *self = *self ^ other;
             }
         }
+        forward_ref_op_assign! { impl BitXorAssign, bitxor_assign for Wrapping<$t>, Wrapping<$t> }
 
         #[stable(feature = "rust1", since = "1.0.0")]
         impl BitOr for Wrapping<$t> {
@@ -274,6 +284,7 @@ macro_rules! wrapping_impl {
                 *self = *self | other;
             }
         }
+        forward_ref_op_assign! { impl BitOrAssign, bitor_assign for Wrapping<$t>, Wrapping<$t> }
 
         #[stable(feature = "rust1", since = "1.0.0")]
         impl BitAnd for Wrapping<$t> {
@@ -294,6 +305,7 @@ macro_rules! wrapping_impl {
                 *self = *self & other;
             }
         }
+        forward_ref_op_assign! { impl BitAndAssign, bitand_assign for Wrapping<$t>, Wrapping<$t> }
 
         #[stable(feature = "wrapping_neg", since = "1.10.0")]
         impl Neg for Wrapping<$t> {
diff --git a/src/libcore/ops/arith.rs b/src/libcore/ops/arith.rs
index 62007caedd3fc..8b3d662a6db77 100644
--- a/src/libcore/ops/arith.rs
+++ b/src/libcore/ops/arith.rs
@@ -662,6 +662,8 @@ macro_rules! add_assign_impl {
             #[rustc_inherit_overflow_checks]
             fn add_assign(&mut self, other: $t) { *self += other }
         }
+
+        forward_ref_op_assign! { impl AddAssign, add_assign for $t, $t }
     )+)
 }
 
@@ -713,6 +715,8 @@ macro_rules! sub_assign_impl {
             #[rustc_inherit_overflow_checks]
             fn sub_assign(&mut self, other: $t) { *self -= other }
         }
+
+        forward_ref_op_assign! { impl SubAssign, sub_assign for $t, $t }
     )+)
 }
 
@@ -755,6 +759,8 @@ macro_rules! mul_assign_impl {
             #[rustc_inherit_overflow_checks]
             fn mul_assign(&mut self, other: $t) { *self *= other }
         }
+
+        forward_ref_op_assign! { impl MulAssign, mul_assign for $t, $t }
     )+)
 }
 
@@ -796,6 +802,8 @@ macro_rules! div_assign_impl {
             #[inline]
             fn div_assign(&mut self, other: $t) { *self /= other }
         }
+
+        forward_ref_op_assign! { impl DivAssign, div_assign for $t, $t }
     )+)
 }
 
@@ -841,6 +849,8 @@ macro_rules! rem_assign_impl {
             #[inline]
             fn rem_assign(&mut self, other: $t) { *self %= other }
         }
+
+        forward_ref_op_assign! { impl RemAssign, rem_assign for $t, $t }
     )+)
 }
 
diff --git a/src/libcore/ops/bit.rs b/src/libcore/ops/bit.rs
index 0bc5e554cb347..7ac5fc4debf14 100644
--- a/src/libcore/ops/bit.rs
+++ b/src/libcore/ops/bit.rs
@@ -593,6 +593,8 @@ macro_rules! bitand_assign_impl {
             #[inline]
             fn bitand_assign(&mut self, other: $t) { *self &= other }
         }
+
+        forward_ref_op_assign! { impl BitAndAssign, bitand_assign for $t, $t }
     )+)
 }
 
@@ -638,6 +640,8 @@ macro_rules! bitor_assign_impl {
             #[inline]
             fn bitor_assign(&mut self, other: $t) { *self |= other }
         }
+
+        forward_ref_op_assign! { impl BitOrAssign, bitor_assign for $t, $t }
     )+)
 }
 
@@ -683,6 +687,8 @@ macro_rules! bitxor_assign_impl {
             #[inline]
             fn bitxor_assign(&mut self, other: $t) { *self ^= other }
         }
+
+        forward_ref_op_assign! { impl BitXorAssign, bitxor_assign for $t, $t }
     )+)
 }
 
@@ -729,6 +735,8 @@ macro_rules! shl_assign_impl {
                 *self <<= other
             }
         }
+
+        forward_ref_op_assign! { impl ShlAssign, shl_assign for $t, $f }
     )
 }
 
@@ -793,6 +801,8 @@ macro_rules! shr_assign_impl {
                 *self >>= other
             }
         }
+
+        forward_ref_op_assign! { impl ShrAssign, shr_assign for $t, $f }
     )
 }
 
diff --git a/src/libcore/ops/range.rs b/src/libcore/ops/range.rs
index 463a50491a866..3f573f7c7eb69 100644
--- a/src/libcore/ops/range.rs
+++ b/src/libcore/ops/range.rs
@@ -241,9 +241,9 @@ impl<Idx: PartialOrd<Idx>> RangeTo<Idx> {
     }
 }
 
-/// An range bounded inclusively below and above (`start...end`).
+/// An range bounded inclusively below and above (`start..=end`).
 ///
-/// The `RangeInclusive` `start...end` contains all values with `x >= start`
+/// The `RangeInclusive` `start..=end` contains all values with `x >= start`
 /// and `x <= end`.
 ///
 /// # Examples
@@ -251,12 +251,12 @@ impl<Idx: PartialOrd<Idx>> RangeTo<Idx> {
 /// ```
 /// #![feature(inclusive_range,inclusive_range_syntax)]
 ///
-/// assert_eq!((3...5), std::ops::RangeInclusive { start: 3, end: 5 });
-/// assert_eq!(3 + 4 + 5, (3...5).sum());
+/// assert_eq!((3..=5), std::ops::RangeInclusive { start: 3, end: 5 });
+/// assert_eq!(3 + 4 + 5, (3..=5).sum());
 ///
 /// let arr = [0, 1, 2, 3];
-/// assert_eq!(arr[ ...2], [0,1,2  ]);
-/// assert_eq!(arr[1...2], [  1,2  ]);  // RangeInclusive
+/// assert_eq!(arr[ ..=2], [0,1,2  ]);
+/// assert_eq!(arr[1..=2], [  1,2  ]);  // RangeInclusive
 /// ```
 #[derive(Clone, PartialEq, Eq, Hash)]  // not Copy -- see #27186
 #[unstable(feature = "inclusive_range", reason = "recently added, follows RFC", issue = "28237")]
@@ -276,7 +276,7 @@ pub struct RangeInclusive<Idx> {
 #[unstable(feature = "inclusive_range", reason = "recently added, follows RFC", issue = "28237")]
 impl<Idx: fmt::Debug> fmt::Debug for RangeInclusive<Idx> {
     fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
-        write!(fmt, "{:?}...{:?}", self.start, self.end)
+        write!(fmt, "{:?}..={:?}", self.start, self.end)
     }
 }
 
@@ -289,32 +289,32 @@ impl<Idx: PartialOrd<Idx>> RangeInclusive<Idx> {
     /// ```
     /// #![feature(range_contains,inclusive_range_syntax)]
     ///
-    /// assert!(!(3...5).contains(2));
-    /// assert!( (3...5).contains(3));
-    /// assert!( (3...5).contains(4));
-    /// assert!( (3...5).contains(5));
-    /// assert!(!(3...5).contains(6));
+    /// assert!(!(3..=5).contains(2));
+    /// assert!( (3..=5).contains(3));
+    /// assert!( (3..=5).contains(4));
+    /// assert!( (3..=5).contains(5));
+    /// assert!(!(3..=5).contains(6));
     ///
-    /// assert!( (3...3).contains(3));
-    /// assert!(!(3...2).contains(3));
+    /// assert!( (3..=3).contains(3));
+    /// assert!(!(3..=2).contains(3));
     /// ```
     pub fn contains(&self, item: Idx) -> bool {
         self.start <= item && item <= self.end
     }
 }
 
-/// A range only bounded inclusively above (`...end`).
+/// A range only bounded inclusively above (`..=end`).
 ///
-/// The `RangeToInclusive` `...end` contains all values with `x <= end`.
+/// The `RangeToInclusive` `..=end` contains all values with `x <= end`.
 /// It cannot serve as an [`Iterator`] because it doesn't have a starting point.
 ///
 /// # Examples
 ///
-/// The `...end` syntax is a `RangeToInclusive`:
+/// The `..=end` syntax is a `RangeToInclusive`:
 ///
 /// ```
 /// #![feature(inclusive_range,inclusive_range_syntax)]
-/// assert_eq!((...5), std::ops::RangeToInclusive{ end: 5 });
+/// assert_eq!((..=5), std::ops::RangeToInclusive{ end: 5 });
 /// ```
 ///
 /// It does not have an [`IntoIterator`] implementation, so you can't use it in a
@@ -325,7 +325,7 @@ impl<Idx: PartialOrd<Idx>> RangeInclusive<Idx> {
 ///
 /// // error[E0277]: the trait bound `std::ops::RangeToInclusive<{integer}>:
 /// // std::iter::Iterator` is not satisfied
-/// for i in ...5 {
+/// for i in ..=5 {
 ///     // ...
 /// }
 /// ```
@@ -337,8 +337,8 @@ impl<Idx: PartialOrd<Idx>> RangeInclusive<Idx> {
 /// #![feature(inclusive_range_syntax)]
 ///
 /// let arr = [0, 1, 2, 3];
-/// assert_eq!(arr[ ...2], [0,1,2  ]);  // RangeToInclusive
-/// assert_eq!(arr[1...2], [  1,2  ]);
+/// assert_eq!(arr[ ..=2], [0,1,2  ]);  // RangeToInclusive
+/// assert_eq!(arr[1..=2], [  1,2  ]);
 /// ```
 ///
 /// [`IntoIterator`]: ../iter/trait.Iterator.html
@@ -357,7 +357,7 @@ pub struct RangeToInclusive<Idx> {
 #[unstable(feature = "inclusive_range", reason = "recently added, follows RFC", issue = "28237")]
 impl<Idx: fmt::Debug> fmt::Debug for RangeToInclusive<Idx> {
     fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
-        write!(fmt, "...{:?}", self.end)
+        write!(fmt, "..={:?}", self.end)
     }
 }
 
@@ -370,9 +370,9 @@ impl<Idx: PartialOrd<Idx>> RangeToInclusive<Idx> {
     /// ```
     /// #![feature(range_contains,inclusive_range_syntax)]
     ///
-    /// assert!( (...5).contains(-1_000_000_000));
-    /// assert!( (...5).contains(5));
-    /// assert!(!(...5).contains(6));
+    /// assert!( (..=5).contains(-1_000_000_000));
+    /// assert!( (..=5).contains(5));
+    /// assert!(!(..=5).contains(6));
     /// ```
     pub fn contains(&self, item: Idx) -> bool {
         (item <= self.end)
diff --git a/src/libcore/ops/unsize.rs b/src/libcore/ops/unsize.rs
index 58da290cfb694..cd896859b16bc 100644
--- a/src/libcore/ops/unsize.rs
+++ b/src/libcore/ops/unsize.rs
@@ -42,7 +42,7 @@ use marker::Unsize;
 /// [unsize]: ../marker/trait.Unsize.html
 /// [nomicon-coerce]: ../../nomicon/coercions.html
 #[unstable(feature = "coerce_unsized", issue = "27732")]
-#[lang="coerce_unsized"]
+#[lang = "coerce_unsized"]
 pub trait CoerceUnsized<T> {
     // Empty.
 }
diff --git a/src/libcore/option.rs b/src/libcore/option.rs
index 138e04c7737e0..980ea551f0806 100644
--- a/src/libcore/option.rs
+++ b/src/libcore/option.rs
@@ -146,7 +146,7 @@
 #![stable(feature = "rust1", since = "1.0.0")]
 
 use iter::{FromIterator, FusedIterator, TrustedLen};
-use mem;
+use {mem, ops};
 
 // Note that this is not a lang item per se, but it has a hidden dependency on
 // `Iterator`, which is one. The compiler assumes that the `next` method of
@@ -1123,3 +1123,29 @@ impl<A, V: FromIterator<A>> FromIterator<Option<A>> for Option<V> {
         }
     }
 }
+
+/// The error type that results from applying the try operator (`?`) to a `None` value. If you wish
+/// to allow `x?` (where `x` is an `Option<T>`) to be converted into your error type, you can
+/// implement `impl From<NoneError>` for `YourErrorType`. In that case, `x?` within a function that
+/// returns `Result<_, YourErrorType>` will translate a `None` value into an `Err` result.
+#[unstable(feature = "try_trait", issue = "42327")]
+#[derive(Clone, Copy, PartialEq, PartialOrd, Eq, Ord, Debug, Hash)]
+pub struct NoneError;
+
+#[unstable(feature = "try_trait", issue = "42327")]
+impl<T> ops::Try for Option<T> {
+    type Ok = T;
+    type Error = NoneError;
+
+    fn into_result(self) -> Result<T, NoneError> {
+        self.ok_or(NoneError)
+    }
+
+    fn from_ok(v: T) -> Self {
+        Some(v)
+    }
+
+    fn from_error(_: NoneError) -> Self {
+        None
+    }
+}
diff --git a/src/libcore/ptr.rs b/src/libcore/ptr.rs
index 4041a3760e5ca..34d310446536d 100644
--- a/src/libcore/ptr.rs
+++ b/src/libcore/ptr.rs
@@ -56,7 +56,7 @@ pub use intrinsics::write_bytes;
 /// This has all the same safety problems as `ptr::read` with respect to
 /// invalid pointers, types, and double drops.
 #[stable(feature = "drop_in_place", since = "1.8.0")]
-#[lang="drop_in_place"]
+#[lang = "drop_in_place"]
 #[allow(unconditional_recursion)]
 pub unsafe fn drop_in_place<T: ?Sized>(to_drop: *mut T) {
     // Code here does not matter - this is replaced by the
diff --git a/src/libcore/slice/mod.rs b/src/libcore/slice/mod.rs
index dacc014955a90..ae243f3f246a5 100644
--- a/src/libcore/slice/mod.rs
+++ b/src/libcore/slice/mod.rs
@@ -16,6 +16,9 @@
 
 #![stable(feature = "rust1", since = "1.0.0")]
 
+// FIXME: after next stage0, change RangeInclusive { ... } back to ..=
+use ops::RangeInclusive;
+
 // How this module is organized.
 //
 // The library infrastructure for slices is fairly messy. There's
@@ -1044,32 +1047,32 @@ impl<T> SliceIndex<[T]> for ops::RangeToInclusive<usize> {
 
     #[inline]
     fn get(self, slice: &[T]) -> Option<&[T]> {
-        (0...self.end).get(slice)
+        (RangeInclusive { start: 0, end: self.end }).get(slice)
     }
 
     #[inline]
     fn get_mut(self, slice: &mut [T]) -> Option<&mut [T]> {
-        (0...self.end).get_mut(slice)
+        (RangeInclusive { start: 0, end: self.end }).get_mut(slice)
     }
 
     #[inline]
     unsafe fn get_unchecked(self, slice: &[T]) -> &[T] {
-        (0...self.end).get_unchecked(slice)
+        (RangeInclusive { start: 0, end: self.end }).get_unchecked(slice)
     }
 
     #[inline]
     unsafe fn get_unchecked_mut(self, slice: &mut [T]) -> &mut [T] {
-        (0...self.end).get_unchecked_mut(slice)
+        (RangeInclusive { start: 0, end: self.end }).get_unchecked_mut(slice)
     }
 
     #[inline]
     fn index(self, slice: &[T]) -> &[T] {
-        (0...self.end).index(slice)
+        (RangeInclusive { start: 0, end: self.end }).index(slice)
     }
 
     #[inline]
     fn index_mut(self, slice: &mut [T]) -> &mut [T] {
-        (0...self.end).index_mut(slice)
+        (RangeInclusive { start: 0, end: self.end }).index_mut(slice)
     }
 }
 
diff --git a/src/libcore/str/mod.rs b/src/libcore/str/mod.rs
index 5d0cefa101335..0af9fcf0a3d3b 100644
--- a/src/libcore/str/mod.rs
+++ b/src/libcore/str/mod.rs
@@ -18,9 +18,9 @@ use self::pattern::Pattern;
 use self::pattern::{Searcher, ReverseSearcher, DoubleEndedSearcher};
 
 use char;
-use convert::TryFrom;
 use fmt;
-use iter::{Map, Cloned, FusedIterator};
+use iter::{Map, Cloned, FusedIterator, TrustedLen};
+use iter_private::TrustedRandomAccess;
 use slice::{self, SliceIndex};
 use mem;
 
@@ -818,6 +818,17 @@ impl<'a> ExactSizeIterator for Bytes<'a> {
 #[unstable(feature = "fused", issue = "35602")]
 impl<'a> FusedIterator for Bytes<'a> {}
 
+#[unstable(feature = "trusted_len", issue = "37572")]
+unsafe impl<'a> TrustedLen for Bytes<'a> {}
+
+#[doc(hidden)]
+unsafe impl<'a> TrustedRandomAccess for Bytes<'a> {
+    unsafe fn get_unchecked(&mut self, i: usize) -> u8 {
+        self.0.get_unchecked(i)
+    }
+    fn may_have_side_effect() -> bool { false }
+}
+
 /// This macro generates a Clone impl for string pattern API
 /// wrapper types of the form X<'a, P>
 macro_rules! derive_pattern_clone {
@@ -2186,7 +2197,7 @@ pub trait StrExt {
     #[stable(feature = "core", since = "1.6.0")]
     fn is_empty(&self) -> bool;
     #[stable(feature = "core", since = "1.6.0")]
-    fn parse<'a, T: TryFrom<&'a str>>(&'a self) -> Result<T, T::Error>;
+    fn parse<T: FromStr>(&self) -> Result<T, T::Err>;
 }
 
 // truncate `&str` to length at most equal to `max`
@@ -2506,9 +2517,7 @@ impl StrExt for str {
     fn is_empty(&self) -> bool { self.len() == 0 }
 
     #[inline]
-    fn parse<'a, T>(&'a self) -> Result<T, T::Error> where T: TryFrom<&'a str> {
-        T::try_from(self)
-    }
+    fn parse<T: FromStr>(&self) -> Result<T, T::Err> { FromStr::from_str(self) }
 }
 
 #[stable(feature = "rust1", since = "1.0.0")]
diff --git a/src/libcore/sync/atomic.rs b/src/libcore/sync/atomic.rs
index 3dd08e6971066..465d31b5f493d 100644
--- a/src/libcore/sync/atomic.rs
+++ b/src/libcore/sync/atomic.rs
@@ -926,10 +926,24 @@ macro_rules! atomic_int {
      $stable_cxchg:meta,
      $stable_debug:meta,
      $stable_access:meta,
+     $s_int_type:expr, $int_ref:expr,
      $int_type:ident $atomic_type:ident $atomic_init:ident) => {
         /// An integer type which can be safely shared between threads.
         ///
-        /// This type has the same in-memory representation as the underlying integer type.
+        /// This type has the same in-memory representation as the underlying
+        /// integer type, [`
+        #[doc = $s_int_type]
+        /// `](
+        #[doc = $int_ref]
+        /// ). For more about the differences between atomic types and
+        /// non-atomic types, please see the [module-level documentation].
+        ///
+        /// Please note that examples are shared between atomic variants of
+        /// primitive integer types, so it's normal that they are all
+        /// demonstrating [`AtomicIsize`].
+        ///
+        /// [module-level documentation]: index.html
+        /// [`AtomicIsize`]: struct.AtomicIsize.html
         #[$stable]
         pub struct $atomic_type {
             v: UnsafeCell<$int_type>,
@@ -1339,6 +1353,7 @@ atomic_int! {
     unstable(feature = "integer_atomics", issue = "32976"),
     unstable(feature = "integer_atomics", issue = "32976"),
     unstable(feature = "integer_atomics", issue = "32976"),
+    "i8", "../../../std/primitive.i8.html",
     i8 AtomicI8 ATOMIC_I8_INIT
 }
 #[cfg(target_has_atomic = "8")]
@@ -1348,6 +1363,7 @@ atomic_int! {
     unstable(feature = "integer_atomics", issue = "32976"),
     unstable(feature = "integer_atomics", issue = "32976"),
     unstable(feature = "integer_atomics", issue = "32976"),
+    "u8", "../../../std/primitive.u8.html",
     u8 AtomicU8 ATOMIC_U8_INIT
 }
 #[cfg(target_has_atomic = "16")]
@@ -1357,6 +1373,7 @@ atomic_int! {
     unstable(feature = "integer_atomics", issue = "32976"),
     unstable(feature = "integer_atomics", issue = "32976"),
     unstable(feature = "integer_atomics", issue = "32976"),
+    "i16", "../../../std/primitive.i16.html",
     i16 AtomicI16 ATOMIC_I16_INIT
 }
 #[cfg(target_has_atomic = "16")]
@@ -1366,6 +1383,7 @@ atomic_int! {
     unstable(feature = "integer_atomics", issue = "32976"),
     unstable(feature = "integer_atomics", issue = "32976"),
     unstable(feature = "integer_atomics", issue = "32976"),
+    "u16", "../../../std/primitive.u16.html",
     u16 AtomicU16 ATOMIC_U16_INIT
 }
 #[cfg(target_has_atomic = "32")]
@@ -1375,6 +1393,7 @@ atomic_int! {
     unstable(feature = "integer_atomics", issue = "32976"),
     unstable(feature = "integer_atomics", issue = "32976"),
     unstable(feature = "integer_atomics", issue = "32976"),
+    "i32", "../../../std/primitive.i32.html",
     i32 AtomicI32 ATOMIC_I32_INIT
 }
 #[cfg(target_has_atomic = "32")]
@@ -1384,6 +1403,7 @@ atomic_int! {
     unstable(feature = "integer_atomics", issue = "32976"),
     unstable(feature = "integer_atomics", issue = "32976"),
     unstable(feature = "integer_atomics", issue = "32976"),
+    "u32", "../../../std/primitive.u32.html",
     u32 AtomicU32 ATOMIC_U32_INIT
 }
 #[cfg(target_has_atomic = "64")]
@@ -1393,6 +1413,7 @@ atomic_int! {
     unstable(feature = "integer_atomics", issue = "32976"),
     unstable(feature = "integer_atomics", issue = "32976"),
     unstable(feature = "integer_atomics", issue = "32976"),
+    "i64", "../../../std/primitive.i64.html",
     i64 AtomicI64 ATOMIC_I64_INIT
 }
 #[cfg(target_has_atomic = "64")]
@@ -1402,6 +1423,7 @@ atomic_int! {
     unstable(feature = "integer_atomics", issue = "32976"),
     unstable(feature = "integer_atomics", issue = "32976"),
     unstable(feature = "integer_atomics", issue = "32976"),
+    "u64", "../../../std/primitive.u64.html",
     u64 AtomicU64 ATOMIC_U64_INIT
 }
 #[cfg(target_has_atomic = "ptr")]
@@ -1411,6 +1433,7 @@ atomic_int!{
     stable(feature = "extended_compare_and_swap", since = "1.10.0"),
     stable(feature = "atomic_debug", since = "1.3.0"),
     stable(feature = "atomic_access", since = "1.15.0"),
+    "isize", "../../../std/primitive.isize.html",
     isize AtomicIsize ATOMIC_ISIZE_INIT
 }
 #[cfg(target_has_atomic = "ptr")]
@@ -1420,6 +1443,7 @@ atomic_int!{
     stable(feature = "extended_compare_and_swap", since = "1.10.0"),
     stable(feature = "atomic_debug", since = "1.3.0"),
     stable(feature = "atomic_access", since = "1.15.0"),
+    "usize", "../../../std/primitive.usize.html",
     usize AtomicUsize ATOMIC_USIZE_INIT
 }
 
@@ -1752,7 +1776,7 @@ pub fn fence(order: Ordering) {
 /// [`Relaxed`]: enum.Ordering.html#variant.Relaxed
 /// [memory barriers]: https://www.kernel.org/doc/Documentation/memory-barriers.txt
 #[inline]
-#[stable(feature = "compiler_fences", since = "1.22.0")]
+#[stable(feature = "compiler_fences", since = "1.21.0")]
 pub fn compiler_fence(order: Ordering) {
     unsafe {
         match order {
diff --git a/src/libcore/tests/char.rs b/src/libcore/tests/char.rs
index 7c3b90c81536e..4e10ceac878b6 100644
--- a/src/libcore/tests/char.rs
+++ b/src/libcore/tests/char.rs
@@ -32,7 +32,6 @@ fn test_convert() {
 #[test]
 fn test_from_str() {
     assert_eq!(char::from_str("a").unwrap(), 'a');
-    assert_eq!(char::try_from("a").unwrap(), 'a');
     assert_eq!(char::from_str("\0").unwrap(), '\0');
     assert_eq!(char::from_str("\u{D7FF}").unwrap(), '\u{d7FF}');
     assert!(char::from_str("").is_err());
diff --git a/src/libcore/tests/iter.rs b/src/libcore/tests/iter.rs
index 59ae30de452c9..f8c6fc5c8fa42 100644
--- a/src/libcore/tests/iter.rs
+++ b/src/libcore/tests/iter.rs
@@ -248,6 +248,25 @@ fn test_filter_map() {
     assert_eq!(it.collect::<Vec<usize>>(), [0*0, 2*2, 4*4, 6*6, 8*8]);
 }
 
+#[test]
+fn test_filter_map_fold() {
+    let xs = [0, 1, 2, 3, 4, 5, 6, 7, 8];
+    let ys = [0*0, 2*2, 4*4, 6*6, 8*8];
+    let it = xs.iter().filter_map(|&x| if x % 2 == 0 { Some(x*x) } else { None });
+    let i = it.fold(0, |i, x| {
+        assert_eq!(x, ys[i]);
+        i + 1
+    });
+    assert_eq!(i, ys.len());
+
+    let it = xs.iter().filter_map(|&x| if x % 2 == 0 { Some(x*x) } else { None });
+    let i = it.rfold(ys.len(), |i, x| {
+        assert_eq!(x, ys[i - 1]);
+        i - 1
+    });
+    assert_eq!(i, 0);
+}
+
 #[test]
 fn test_iterator_enumerate() {
     let xs = [0, 1, 2, 3, 4, 5];
@@ -282,7 +301,31 @@ fn test_iterator_enumerate_nth() {
 #[test]
 fn test_iterator_enumerate_count() {
     let xs = [0, 1, 2, 3, 4, 5];
-    assert_eq!(xs.iter().count(), 6);
+    assert_eq!(xs.iter().enumerate().count(), 6);
+}
+
+#[test]
+fn test_iterator_enumerate_fold() {
+    let xs = [0, 1, 2, 3, 4, 5];
+    let mut it = xs.iter().enumerate();
+    // steal a couple to get an interesting offset
+    assert_eq!(it.next(), Some((0, &0)));
+    assert_eq!(it.next(), Some((1, &1)));
+    let i = it.fold(2, |i, (j, &x)| {
+        assert_eq!(i, j);
+        assert_eq!(x, xs[j]);
+        i + 1
+    });
+    assert_eq!(i, xs.len());
+
+    let mut it = xs.iter().enumerate();
+    assert_eq!(it.next(), Some((0, &0)));
+    let i = it.rfold(xs.len() - 1, |i, (j, &x)| {
+        assert_eq!(i, j);
+        assert_eq!(x, xs[j]);
+        i - 1
+    });
+    assert_eq!(i, 0);
 }
 
 #[test]
@@ -291,6 +334,25 @@ fn test_iterator_filter_count() {
     assert_eq!(xs.iter().filter(|&&x| x % 2 == 0).count(), 5);
 }
 
+#[test]
+fn test_iterator_filter_fold() {
+    let xs = [0, 1, 2, 3, 4, 5, 6, 7, 8];
+    let ys = [0, 2, 4, 6, 8];
+    let it = xs.iter().filter(|&&x| x % 2 == 0);
+    let i = it.fold(0, |i, &x| {
+        assert_eq!(x, ys[i]);
+        i + 1
+    });
+    assert_eq!(i, ys.len());
+
+    let it = xs.iter().filter(|&&x| x % 2 == 0);
+    let i = it.rfold(ys.len(), |i, &x| {
+        assert_eq!(x, ys[i - 1]);
+        i - 1
+    });
+    assert_eq!(i, 0);
+}
+
 #[test]
 fn test_iterator_peekable() {
     let xs = vec![0, 1, 2, 3, 4, 5];
@@ -381,6 +443,18 @@ fn test_iterator_peekable_last() {
     assert_eq!(it.last(), None);
 }
 
+#[test]
+fn test_iterator_peekable_fold() {
+    let xs = [0, 1, 2, 3, 4, 5];
+    let mut it = xs.iter().peekable();
+    assert_eq!(it.peek(), Some(&&0));
+    let i = it.fold(0, |i, &x| {
+        assert_eq!(x, xs[i]);
+        i + 1
+    });
+    assert_eq!(i, xs.len());
+}
+
 /// This is an iterator that follows the Iterator contract,
 /// but it is not fused. After having returned None once, it will start
 /// producing elements if .next() is called again.
@@ -470,6 +544,26 @@ fn test_iterator_skip_while() {
     assert_eq!(i, ys.len());
 }
 
+#[test]
+fn test_iterator_skip_while_fold() {
+    let xs = [0, 1, 2, 3, 5, 13, 15, 16, 17, 19];
+    let ys = [15, 16, 17, 19];
+    let it = xs.iter().skip_while(|&x| *x < 15);
+    let i = it.fold(0, |i, &x| {
+        assert_eq!(x, ys[i]);
+        i + 1
+    });
+    assert_eq!(i, ys.len());
+
+    let mut it = xs.iter().skip_while(|&x| *x < 15);
+    assert_eq!(it.next(), Some(&ys[0])); // process skips before folding
+    let i = it.fold(1, |i, &x| {
+        assert_eq!(x, ys[i]);
+        i + 1
+    });
+    assert_eq!(i, ys.len());
+}
+
 #[test]
 fn test_iterator_skip() {
     let xs = [0, 1, 2, 3, 5, 13, 15, 16, 17, 19, 20, 30];
@@ -566,6 +660,26 @@ fn test_iterator_skip_last() {
     assert_eq!(it.last(), Some(&30));
 }
 
+#[test]
+fn test_iterator_skip_fold() {
+    let xs = [0, 1, 2, 3, 5, 13, 15, 16, 17, 19, 20, 30];
+    let ys = [13, 15, 16, 17, 19, 20, 30];
+    let it = xs.iter().skip(5);
+    let i = it.fold(0, |i, &x| {
+        assert_eq!(x, ys[i]);
+        i + 1
+    });
+    assert_eq!(i, ys.len());
+
+    let mut it = xs.iter().skip(5);
+    assert_eq!(it.next(), Some(&ys[0])); // process skips before folding
+    let i = it.fold(1, |i, &x| {
+        assert_eq!(x, ys[i]);
+        i + 1
+    });
+    assert_eq!(i, ys.len());
+}
+
 #[test]
 fn test_iterator_take() {
     let xs = [0, 1, 2, 3, 5, 13, 15, 16, 17, 19];
@@ -661,13 +775,22 @@ fn test_iterator_flat_map_fold() {
     let xs = [0, 3, 6];
     let ys = [1, 2, 3, 4, 5, 6, 7];
     let mut it = xs.iter().flat_map(|&x| x..x+3);
-    it.next();
-    it.next_back();
+    assert_eq!(it.next(), Some(0));
+    assert_eq!(it.next_back(), Some(8));
     let i = it.fold(0, |i, x| {
         assert_eq!(x, ys[i]);
         i + 1
     });
     assert_eq!(i, ys.len());
+
+    let mut it = xs.iter().flat_map(|&x| x..x+3);
+    assert_eq!(it.next(), Some(0));
+    assert_eq!(it.next_back(), Some(8));
+    let i = it.rfold(ys.len(), |i, x| {
+        assert_eq!(x, ys[i - 1]);
+        i - 1
+    });
+    assert_eq!(i, 0);
 }
 
 #[test]
@@ -684,6 +807,32 @@ fn test_inspect() {
     assert_eq!(&xs[..], &ys[..]);
 }
 
+#[test]
+fn test_inspect_fold() {
+    let xs = [1, 2, 3, 4];
+    let mut n = 0;
+    {
+        let it = xs.iter().inspect(|_| n += 1);
+        let i = it.fold(0, |i, &x| {
+            assert_eq!(x, xs[i]);
+            i + 1
+        });
+        assert_eq!(i, xs.len());
+    }
+    assert_eq!(n, xs.len());
+
+    let mut n = 0;
+    {
+        let it = xs.iter().inspect(|_| n += 1);
+        let i = it.rfold(xs.len(), |i, &x| {
+            assert_eq!(x, xs[i - 1]);
+            i - 1
+        });
+        assert_eq!(i, 0);
+    }
+    assert_eq!(n, xs.len());
+}
+
 #[test]
 fn test_cycle() {
     let cycle_len = 3;
@@ -1094,21 +1243,21 @@ fn test_range() {
 
 #[test]
 fn test_range_inclusive_exhaustion() {
-    let mut r = 10...10;
+    let mut r = 10..=10;
     assert_eq!(r.next(), Some(10));
-    assert_eq!(r, 1...0);
+    assert_eq!(r, 1..=0);
 
-    let mut r = 10...10;
+    let mut r = 10..=10;
     assert_eq!(r.next_back(), Some(10));
-    assert_eq!(r, 1...0);
+    assert_eq!(r, 1..=0);
 
-    let mut r = 10...12;
+    let mut r = 10..=12;
     assert_eq!(r.nth(2), Some(12));
-    assert_eq!(r, 1...0);
+    assert_eq!(r, 1..=0);
 
-    let mut r = 10...12;
+    let mut r = 10..=12;
     assert_eq!(r.nth(5), None);
-    assert_eq!(r, 1...0);
+    assert_eq!(r, 1..=0);
 
 }
 
@@ -1145,20 +1294,20 @@ fn test_range_from_nth() {
 
 #[test]
 fn test_range_inclusive_nth() {
-    assert_eq!((10...15).nth(0), Some(10));
-    assert_eq!((10...15).nth(1), Some(11));
-    assert_eq!((10...15).nth(5), Some(15));
-    assert_eq!((10...15).nth(6), None);
+    assert_eq!((10..=15).nth(0), Some(10));
+    assert_eq!((10..=15).nth(1), Some(11));
+    assert_eq!((10..=15).nth(5), Some(15));
+    assert_eq!((10..=15).nth(6), None);
 
-    let mut r = 10_u8...20;
+    let mut r = 10_u8..=20;
     assert_eq!(r.nth(2), Some(12));
-    assert_eq!(r, 13...20);
+    assert_eq!(r, 13..=20);
     assert_eq!(r.nth(2), Some(15));
-    assert_eq!(r, 16...20);
+    assert_eq!(r, 16..=20);
     assert_eq!(r.is_empty(), false);
     assert_eq!(r.nth(10), None);
     assert_eq!(r.is_empty(), true);
-    assert_eq!(r, 1...0);  // We may not want to document/promise this detail
+    assert_eq!(r, 1..=0);  // We may not want to document/promise this detail
 }
 
 #[test]
@@ -1241,6 +1390,31 @@ fn test_fuse_count() {
     // Can't check len now because count consumes.
 }
 
+#[test]
+fn test_fuse_fold() {
+    let xs = [0, 1, 2];
+    let it = xs.iter(); // `FusedIterator`
+    let i = it.fuse().fold(0, |i, &x| {
+        assert_eq!(x, xs[i]);
+        i + 1
+    });
+    assert_eq!(i, xs.len());
+
+    let it = xs.iter(); // `FusedIterator`
+    let i = it.fuse().rfold(xs.len(), |i, &x| {
+        assert_eq!(x, xs[i - 1]);
+        i - 1
+    });
+    assert_eq!(i, 0);
+
+    let it = xs.iter().scan((), |_, &x| Some(x)); // `!FusedIterator`
+    let i = it.fuse().fold(0, |i, x| {
+        assert_eq!(x, xs[i]);
+        i + 1
+    });
+    assert_eq!(i, xs.len());
+}
+
 #[test]
 fn test_once() {
     let mut it = once(42);
diff --git a/src/libcore/tests/lib.rs b/src/libcore/tests/lib.rs
index 47995597a0a91..afc5de7b0ee35 100644
--- a/src/libcore/tests/lib.rs
+++ b/src/libcore/tests/lib.rs
@@ -25,6 +25,7 @@
 #![feature(inclusive_range)]
 #![feature(inclusive_range_syntax)]
 #![feature(iter_rfind)]
+#![feature(iter_rfold)]
 #![feature(nonzero)]
 #![feature(rand)]
 #![feature(raw)]
@@ -38,6 +39,7 @@
 #![feature(test)]
 #![feature(trusted_len)]
 #![feature(try_from)]
+#![feature(try_trait)]
 #![feature(unique)]
 
 #![feature(const_atomic_bool_new)]
diff --git a/src/libcore/tests/num/mod.rs b/src/libcore/tests/num/mod.rs
index 400d53ce51a08..7eb5ff9885777 100644
--- a/src/libcore/tests/num/mod.rs
+++ b/src/libcore/tests/num/mod.rs
@@ -8,10 +8,11 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use core::convert::TryFrom;
+use core::convert::{TryFrom, TryInto};
 use core::cmp::PartialEq;
 use core::fmt::Debug;
 use core::marker::Copy;
+use core::num::TryFromIntError;
 use core::ops::{Add, Sub, Mul, Div, Rem};
 use core::option::Option;
 use core::option::Option::{Some, None};
@@ -134,6 +135,13 @@ fn test_empty() {
     assert_eq!("".parse::<u8>().ok(), None);
 }
 
+#[test]
+fn test_infallible_try_from_int_error() {
+    let func = |x: i8| -> Result<i32, TryFromIntError> { Ok(x.try_into()?) };
+
+    assert!(func(0).is_ok());
+}
+
 macro_rules! test_impl_from {
     ($fn_name: ident, $Small: ty, $Large: ty) => {
         #[test]
diff --git a/src/libcore/tests/option.rs b/src/libcore/tests/option.rs
index 6bac55575fb18..22109e28edd9b 100644
--- a/src/libcore/tests/option.rs
+++ b/src/libcore/tests/option.rs
@@ -270,3 +270,30 @@ fn test_cloned() {
     assert_eq!(opt_ref_ref.clone().cloned(), Some(&val));
     assert_eq!(opt_ref_ref.cloned().cloned(), Some(1));
 }
+
+#[test]
+fn test_try() {
+    fn try_option_some() -> Option<u8> {
+        let val = Some(1)?;
+        Some(val)
+    }
+    assert_eq!(try_option_some(), Some(1));
+
+    fn try_option_none() -> Option<u8> {
+        let val = None?;
+        Some(val)
+    }
+    assert_eq!(try_option_none(), None);
+
+    fn try_option_ok() -> Result<u8, NoneError> {
+        let val = Some(1)?;
+        Ok(val)
+    }
+    assert_eq!(try_option_ok(), Ok(1));
+
+    fn try_option_err() -> Result<u8, NoneError> {
+        let val = None?;
+        Ok(val)
+    }
+    assert_eq!(try_option_err(), Err(NoneError));
+}
diff --git a/src/libcore/tests/result.rs b/src/libcore/tests/result.rs
index 4c5f19dee1293..ce41bde8342ed 100644
--- a/src/libcore/tests/result.rs
+++ b/src/libcore/tests/result.rs
@@ -8,6 +8,8 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
+use core::option::*;
+
 fn op1() -> Result<isize, &'static str> { Ok(666) }
 fn op2() -> Result<isize, &'static str> { Err("sadface") }
 
@@ -202,3 +204,30 @@ pub fn test_unwrap_or_default() {
     assert_eq!(op1().unwrap_or_default(), 666);
     assert_eq!(op2().unwrap_or_default(), 0);
 }
+
+#[test]
+fn test_try() {
+    fn try_result_some() -> Option<u8> {
+        let val = Ok(1)?;
+        Some(val)
+    }
+    assert_eq!(try_result_some(), Some(1));
+
+    fn try_result_none() -> Option<u8> {
+        let val = Err(NoneError)?;
+        Some(val)
+    }
+    assert_eq!(try_result_none(), None);
+
+    fn try_result_ok() -> Result<u8, u8> {
+        let val = Ok(1)?;
+        Ok(val)
+    }
+    assert_eq!(try_result_ok(), Ok(1));
+
+    fn try_result_err() -> Result<u8, u8> {
+        let val = Err(1)?;
+        Ok(val)
+    }
+    assert_eq!(try_result_err(), Err(1));
+}
diff --git a/src/libproc_macro/lib.rs b/src/libproc_macro/lib.rs
index 07e933985a0c9..2c540c8de8fc8 100644
--- a/src/libproc_macro/lib.rs
+++ b/src/libproc_macro/lib.rs
@@ -509,6 +509,7 @@ impl TokenTree {
             Dot => op!('.'),
             DotDot => joint!('.', Dot),
             DotDotDot => joint!('.', DotDot),
+            DotDotEq => joint!('.', DotEq),
             Comma => op!(','),
             Semi => op!(';'),
             Colon => op!(':'),
@@ -531,6 +532,7 @@ impl TokenTree {
                 })
             }
 
+            DotEq => unreachable!(),
             OpenDelim(..) | CloseDelim(..) => unreachable!(),
             Whitespace | Comment | Shebang(..) | Eof => unreachable!(),
         };
diff --git a/src/libproc_macro/quote.rs b/src/libproc_macro/quote.rs
index 0db2b86b15f57..8c1f6bfc11a5f 100644
--- a/src/libproc_macro/quote.rs
+++ b/src/libproc_macro/quote.rs
@@ -202,8 +202,8 @@ impl Quote for Token {
 
         gen_match! {
             Eq, Lt, Le, EqEq, Ne, Ge, Gt, AndAnd, OrOr, Not, Tilde, At, Dot, DotDot, DotDotDot,
-            Comma, Semi, Colon, ModSep, RArrow, LArrow, FatArrow, Pound, Dollar, Question,
-            Underscore;
+            DotDotEq, Comma, Semi, Colon, ModSep, RArrow, LArrow, FatArrow, Pound, Dollar,
+            Question, Underscore;
 
             Token::OpenDelim(delim) => quote!(rt::token::OpenDelim((quote delim))),
             Token::CloseDelim(delim) => quote!(rt::token::CloseDelim((quote delim))),
diff --git a/src/libprofiler_builtins/Cargo.toml b/src/libprofiler_builtins/Cargo.toml
index a60db3136797a..eb31f5730d191 100644
--- a/src/libprofiler_builtins/Cargo.toml
+++ b/src/libprofiler_builtins/Cargo.toml
@@ -15,4 +15,4 @@ doc = false
 core = { path = "../libcore" }
 
 [build-dependencies]
-gcc = "0.3.50"
+cc = "1.0"
diff --git a/src/libprofiler_builtins/build.rs b/src/libprofiler_builtins/build.rs
index 41e92b33475da..8508b2dae2c56 100644
--- a/src/libprofiler_builtins/build.rs
+++ b/src/libprofiler_builtins/build.rs
@@ -12,14 +12,14 @@
 //!
 //! See the build.rs for libcompiler_builtins crate for details.
 
-extern crate gcc;
+extern crate cc;
 
 use std::env;
 use std::path::Path;
 
 fn main() {
     let target = env::var("TARGET").expect("TARGET was not set");
-    let cfg = &mut gcc::Build::new();
+    let cfg = &mut cc::Build::new();
 
     let mut profile_sources = vec!["GCDAProfiling.c",
                                    "InstrProfiling.c",
diff --git a/src/librustc/dep_graph/graph.rs b/src/librustc/dep_graph/graph.rs
index 71a7ee84cd144..d9770db9d69a2 100644
--- a/src/librustc/dep_graph/graph.rs
+++ b/src/librustc/dep_graph/graph.rs
@@ -569,28 +569,20 @@ pub(super) struct DepNodeIndexNew {
 }
 
 impl Idx for DepNodeIndexNew {
-    fn new(idx: usize) -> Self {
-        DepNodeIndexNew::new(idx)
+    fn new(v: usize) -> DepNodeIndexNew {
+        assert!((v & 0xFFFF_FFFF) == v);
+        DepNodeIndexNew { index: v as u32 }
     }
+
     fn index(self) -> usize {
-        self.index()
+        self.index as usize
     }
 }
 
 impl DepNodeIndexNew {
-
     const INVALID: DepNodeIndexNew = DepNodeIndexNew {
         index: ::std::u32::MAX,
     };
-
-    fn new(v: usize) -> DepNodeIndexNew {
-        assert!((v & 0xFFFF_FFFF) == v);
-        DepNodeIndexNew { index: v as u32 }
-    }
-
-    fn index(self) -> usize {
-        self.index as usize
-    }
 }
 
 #[derive(Clone, Debug, PartialEq)]
diff --git a/src/librustc/dep_graph/serialized.rs b/src/librustc/dep_graph/serialized.rs
index 21beac9214eef..6110c270086fe 100644
--- a/src/librustc/dep_graph/serialized.rs
+++ b/src/librustc/dep_graph/serialized.rs
@@ -19,14 +19,6 @@ use rustc_data_structures::indexed_vec::{IndexVec, Idx};
          RustcEncodable, RustcDecodable)]
 pub struct SerializedDepNodeIndex(pub u32);
 
-impl SerializedDepNodeIndex {
-    #[inline]
-    pub fn new(idx: usize) -> SerializedDepNodeIndex {
-        assert!(idx <= ::std::u32::MAX as usize);
-        SerializedDepNodeIndex(idx as u32)
-    }
-}
-
 impl Idx for SerializedDepNodeIndex {
     #[inline]
     fn new(idx: usize) -> Self {
diff --git a/src/librustc/diagnostics.rs b/src/librustc/diagnostics.rs
index 76fba1583f3bc..26f56ffacae7f 100644
--- a/src/librustc/diagnostics.rs
+++ b/src/librustc/diagnostics.rs
@@ -1351,74 +1351,6 @@ struct Foo<T: 'static> {
 ```
 "##,
 
-E0312: r##"
-A lifetime of reference outlives lifetime of borrowed content.
-
-Erroneous code example:
-
-```compile_fail,E0312
-fn make_child<'tree, 'human>(
-  x: &'human i32,
-  y: &'tree i32
-) -> &'human i32 {
-    if x > y
-       { x }
-    else
-       { y }
-       // error: lifetime of reference outlives lifetime of borrowed content
-}
-```
-
-The function declares that it returns a reference with the `'human`
-lifetime, but it may return data with the `'tree` lifetime. As neither
-lifetime is declared longer than the other, this results in an
-error. Sometimes, this error is because the function *body* is
-incorrect -- that is, maybe you did not *mean* to return data from
-`y`. In that case, you should fix the function body.
-
-Often, however, the body is correct. In that case, the function
-signature needs to be altered to match the body, so that the caller
-understands that data from either `x` or `y` may be returned. The
-simplest way to do this is to give both function parameters the *same*
-named lifetime:
-
-```
-fn make_child<'human>(
-  x: &'human i32,
-  y: &'human i32
-) -> &'human i32 {
-    if x > y
-       { x }
-    else
-       { y } // ok!
-}
-```
-
-However, in some cases, you may prefer to explicitly declare that one lifetime
-outlives another using a `where` clause:
-
-```
-fn make_child<'tree, 'human>(
-  x: &'human i32,
-  y: &'tree i32
-) -> &'human i32
-where
-  'tree: 'human
-{
-    if x > y
-       { x }
-    else
-       { y } // ok!
-}
-```
-
-Here, the where clause `'tree: 'human` can be read as "the lifetime
-'tree outlives the lifetime 'human" -- meaning, references with the
-`'tree` lifetime live *at least as long as* references with the
-`'human` lifetime. Therefore, it is safe to return data with lifetime
-`'tree` when data with the lifetime `'human` is needed.
-"##,
-
 E0317: r##"
 This error occurs when an `if` expression without an `else` block is used in a
 context where a type other than `()` is expected, for example a `let`
@@ -2028,6 +1960,7 @@ register_diagnostics! {
 //  E0304, // expected signed integer constant
 //  E0305, // expected constant
     E0311, // thing may not live long enough
+    E0312, // lifetime of reference outlives lifetime of borrowed content
     E0313, // lifetime of borrowed pointer outlives lifetime of captured variable
     E0314, // closure outlives stack frame
     E0315, // cannot invoke closure outside of its lifetime
diff --git a/src/librustc/hir/lowering.rs b/src/librustc/hir/lowering.rs
index 95b8e49d60c6a..1fdfbe20328a4 100644
--- a/src/librustc/hir/lowering.rs
+++ b/src/librustc/hir/lowering.rs
@@ -1103,6 +1103,10 @@ impl<'a> LoweringContext<'a> {
             default: tp.default.as_ref().map(|x| self.lower_ty(x)),
             span: tp.span,
             pure_wrt_drop: tp.attrs.iter().any(|attr| attr.check_name("may_dangle")),
+            synthetic: tp.attrs.iter()
+                               .filter(|attr| attr.check_name("rustc_synthetic"))
+                               .map(|_| hir::SyntheticTyParamKind::ImplTrait)
+                               .nth(0),
         }
     }
 
@@ -1864,7 +1868,7 @@ impl<'a> LoweringContext<'a> {
 
     fn lower_range_end(&mut self, e: &RangeEnd) -> hir::RangeEnd {
         match *e {
-            RangeEnd::Included => hir::RangeEnd::Included,
+            RangeEnd::Included(_) => hir::RangeEnd::Included,
             RangeEnd::Excluded => hir::RangeEnd::Excluded,
         }
     }
diff --git a/src/librustc/hir/mod.rs b/src/librustc/hir/mod.rs
index bff71155440a3..9bfedd7a381cb 100644
--- a/src/librustc/hir/mod.rs
+++ b/src/librustc/hir/mod.rs
@@ -351,6 +351,7 @@ pub struct TyParam {
     pub default: Option<P<Ty>>,
     pub span: Span,
     pub pure_wrt_drop: bool,
+    pub synthetic: Option<SyntheticTyParamKind>,
 }
 
 /// Represents lifetimes and type parameters attached to a declaration
@@ -419,6 +420,13 @@ impl Generics {
     }
 }
 
+/// Synthetic Type Parameters are converted to an other form during lowering, this allows
+/// to track the original form they had. Usefull for error messages.
+#[derive(Copy, Clone, PartialEq, Eq, RustcEncodable, RustcDecodable, Hash, Debug)]
+pub enum SyntheticTyParamKind {
+    ImplTrait
+}
+
 /// A `where` clause in a definition
 #[derive(Clone, PartialEq, Eq, RustcEncodable, RustcDecodable, Hash, Debug)]
 pub struct WhereClause {
diff --git a/src/librustc/ich/impls_hir.rs b/src/librustc/ich/impls_hir.rs
index 96d5940caf6a4..776f85cf5da96 100644
--- a/src/librustc/ich/impls_hir.rs
+++ b/src/librustc/ich/impls_hir.rs
@@ -177,7 +177,8 @@ impl_stable_hash_for!(struct hir::TyParam {
     bounds,
     default,
     span,
-    pure_wrt_drop
+    pure_wrt_drop,
+    synthetic
 });
 
 impl_stable_hash_for!(struct hir::Generics {
@@ -187,6 +188,10 @@ impl_stable_hash_for!(struct hir::Generics {
     span
 });
 
+impl_stable_hash_for!(enum hir::SyntheticTyParamKind {
+    ImplTrait
+});
+
 impl_stable_hash_for!(struct hir::WhereClause {
     id,
     predicates
diff --git a/src/librustc/ich/impls_syntax.rs b/src/librustc/ich/impls_syntax.rs
index 56ec6a65eb679..669e1ba773e23 100644
--- a/src/librustc/ich/impls_syntax.rs
+++ b/src/librustc/ich/impls_syntax.rs
@@ -272,6 +272,8 @@ fn hash_token<'gcx, W: StableHasherResult>(token: &token::Token,
         token::Token::Dot |
         token::Token::DotDot |
         token::Token::DotDotDot |
+        token::Token::DotDotEq |
+        token::Token::DotEq |
         token::Token::Comma |
         token::Token::Semi |
         token::Token::Colon |
diff --git a/src/librustc/ich/impls_ty.rs b/src/librustc/ich/impls_ty.rs
index 2bbf807807bad..fe060aaf4269e 100644
--- a/src/librustc/ich/impls_ty.rs
+++ b/src/librustc/ich/impls_ty.rs
@@ -463,7 +463,8 @@ impl_stable_hash_for!(struct ty::TypeParameterDef {
     index,
     has_default,
     object_lifetime_default,
-    pure_wrt_drop
+    pure_wrt_drop,
+    synthetic
 });
 
 impl<'gcx, T> HashStable<StableHashingContext<'gcx>>
diff --git a/src/librustc/infer/error_reporting/different_lifetimes.rs b/src/librustc/infer/error_reporting/different_lifetimes.rs
index 6c57130a9955f..ee30db2625519 100644
--- a/src/librustc/infer/error_reporting/different_lifetimes.rs
+++ b/src/librustc/infer/error_reporting/different_lifetimes.rs
@@ -18,6 +18,7 @@ use infer::region_inference::RegionResolutionError;
 use hir::map as hir_map;
 use middle::resolve_lifetime as rl;
 use hir::intravisit::{self, Visitor, NestedVisitorMap};
+use infer::error_reporting::util::AnonymousArgInfo;
 
 impl<'a, 'gcx, 'tcx> InferCtxt<'a, 'gcx, 'tcx> {
     // This method prints the error message for lifetime errors when both the concerned regions
@@ -57,6 +58,7 @@ impl<'a, 'gcx, 'tcx> InferCtxt<'a, 'gcx, 'tcx> {
         let ty_sup = or_false!(self.find_anon_type(sup, &bregion_sup));
 
         let ty_sub = or_false!(self.find_anon_type(sub, &bregion_sub));
+
         debug!("try_report_anon_anon_conflict: found_arg1={:?} sup={:?} br1={:?}",
                ty_sub,
                sup,
@@ -66,56 +68,70 @@ impl<'a, 'gcx, 'tcx> InferCtxt<'a, 'gcx, 'tcx> {
                sub,
                bregion_sub);
 
-        let (main_label, label1, label2) = if let (Some(sup_arg), Some(sub_arg)) =
-            (self.find_arg_with_region(sup, sup), self.find_arg_with_region(sub, sub)) {
+        let (ty_sup, ty_fndecl_sup) = ty_sup;
+        let (ty_sub, ty_fndecl_sub) = ty_sub;
 
-            let (anon_arg_sup, is_first_sup, anon_arg_sub, is_first_sub) =
-                (sup_arg.arg, sup_arg.is_first, sub_arg.arg, sub_arg.is_first);
-            if self.is_self_anon(is_first_sup, scope_def_id_sup) ||
-               self.is_self_anon(is_first_sub, scope_def_id_sub) {
-                return false;
-            }
+        let AnonymousArgInfo { arg: anon_arg_sup, .. } =
+            or_false!(self.find_arg_with_region(sup, sup));
+        let AnonymousArgInfo { arg: anon_arg_sub, .. } =
+            or_false!(self.find_arg_with_region(sub, sub));
 
-            if self.is_return_type_anon(scope_def_id_sup, bregion_sup) ||
-               self.is_return_type_anon(scope_def_id_sub, bregion_sub) {
-                return false;
-            }
+        let sup_is_ret_type =
+            self.is_return_type_anon(scope_def_id_sup, bregion_sup, ty_fndecl_sup);
+        let sub_is_ret_type =
+            self.is_return_type_anon(scope_def_id_sub, bregion_sub, ty_fndecl_sub);
 
-            if anon_arg_sup == anon_arg_sub {
-                (format!("this type was declared with multiple lifetimes..."),
-                 format!(" with one lifetime"),
-                 format!(" into the other"))
-            } else {
-                let span_label_var1 = if let Some(simple_name) = anon_arg_sup.pat.simple_name() {
-                    format!(" from `{}`", simple_name)
-                } else {
-                    format!("")
-                };
+        let span_label_var1 = if let Some(simple_name) = anon_arg_sup.pat.simple_name() {
+            format!(" from `{}`", simple_name)
+        } else {
+            format!("")
+        };
+
+        let span_label_var2 = if let Some(simple_name) = anon_arg_sub.pat.simple_name() {
+            format!(" into `{}`", simple_name)
+        } else {
+            format!("")
+        };
+
+
+        let (span_1, span_2, main_label, span_label) = match (sup_is_ret_type, sub_is_ret_type) {
+            (None, None) => {
+                let (main_label_1, span_label_1) = if ty_sup == ty_sub {
 
-                let span_label_var2 = if let Some(simple_name) = anon_arg_sub.pat.simple_name() {
-                    format!(" into `{}`", simple_name)
+                    (format!("this type is declared with multiple lifetimes..."),
+                     format!("...but data{} flows{} here",
+                             format!(" with one lifetime"),
+                             format!(" into the other")))
                 } else {
-                    format!("")
+                    (format!("these two types are declared with different lifetimes..."),
+                     format!("...but data{} flows{} here",
+                             span_label_var1,
+                             span_label_var2))
                 };
+                (ty_sup.span, ty_sub.span, main_label_1, span_label_1)
+            }
 
-                let span_label =
-                    format!("these two types are declared with different lifetimes...",);
-
-                (span_label, span_label_var1, span_label_var2)
+            (Some(ret_span), _) => {
+                (ty_sub.span,
+                 ret_span,
+                 format!("this parameter and the return type are declared \
+                          with different lifetimes...",),
+                 format!("...but data{} is returned here", span_label_var1))
+            }
+            (_, Some(ret_span)) => {
+                (ty_sup.span,
+                 ret_span,
+                 format!("this parameter and the return type are declared \
+                          with different lifetimes...",),
+                 format!("...but data{} is returned here", span_label_var1))
             }
-        } else {
-            debug!("no arg with anon region found");
-            debug!("try_report_anon_anon_conflict: is_suitable(sub) = {:?}",
-                   self.is_suitable_region(sub));
-            debug!("try_report_anon_anon_conflict: is_suitable(sup) = {:?}",
-                   self.is_suitable_region(sup));
-            return false;
         };
 
+
         struct_span_err!(self.tcx.sess, span, E0623, "lifetime mismatch")
-            .span_label(ty_sup.span, main_label)
-            .span_label(ty_sub.span, format!(""))
-            .span_label(span, format!("...but data{} flows{} here", label1, label2))
+            .span_label(span_1, main_label)
+            .span_label(span_2, format!(""))
+            .span_label(span, span_label)
             .emit();
         return true;
     }
@@ -135,28 +151,32 @@ impl<'a, 'gcx, 'tcx> InferCtxt<'a, 'gcx, 'tcx> {
     /// ```
     /// The function returns the nested type corresponding to the anonymous region
     /// for e.g. `&u8` and Vec<`&u8`.
-    pub fn find_anon_type(&self, region: Region<'tcx>, br: &ty::BoundRegion) -> Option<&hir::Ty> {
+    pub fn find_anon_type(&self,
+                          region: Region<'tcx>,
+                          br: &ty::BoundRegion)
+                          -> Option<(&hir::Ty, &hir::FnDecl)> {
         if let Some(anon_reg) = self.is_suitable_region(region) {
             let def_id = anon_reg.def_id;
             if let Some(node_id) = self.tcx.hir.as_local_node_id(def_id) {
-                let inputs: &[_] = match self.tcx.hir.get(node_id) {
+                let fndecl = match self.tcx.hir.get(node_id) {
                     hir_map::NodeItem(&hir::Item { node: hir::ItemFn(ref fndecl, ..), .. }) => {
-                        &fndecl.inputs
+                        &fndecl
                     }
                     hir_map::NodeTraitItem(&hir::TraitItem {
-                                               node: hir::TraitItemKind::Method(ref fndecl, ..), ..
-                                           }) => &fndecl.decl.inputs,
+                                               node: hir::TraitItemKind::Method(ref m, ..), ..
+                                           }) |
                     hir_map::NodeImplItem(&hir::ImplItem {
-                                              node: hir::ImplItemKind::Method(ref fndecl, ..), ..
-                                          }) => &fndecl.decl.inputs,
-
-                    _ => &[],
+                                              node: hir::ImplItemKind::Method(ref m, ..), ..
+                                          }) => &m.decl,
+                    _ => return None,
                 };
 
-                return inputs
+                return fndecl
+                           .inputs
                            .iter()
-                           .filter_map(|arg| self.find_component_for_bound_region(&**arg, br))
-                           .next();
+                           .filter_map(|arg| self.find_component_for_bound_region(arg, br))
+                           .next()
+                           .map(|ty| (ty, &**fndecl));
             }
         }
         None
diff --git a/src/librustc/infer/error_reporting/mod.rs b/src/librustc/infer/error_reporting/mod.rs
index ead20b5eb5a3e..3f22950fc773f 100644
--- a/src/librustc/infer/error_reporting/mod.rs
+++ b/src/librustc/infer/error_reporting/mod.rs
@@ -785,10 +785,44 @@ impl<'a, 'gcx, 'tcx> InferCtxt<'a, 'gcx, 'tcx> {
                                     bound_kind: GenericKind<'tcx>,
                                     sub: Region<'tcx>)
     {
-        // FIXME: it would be better to report the first error message
-        // with the span of the parameter itself, rather than the span
-        // where the error was detected. But that span is not readily
-        // accessible.
+        // Attempt to obtain the span of the parameter so we can
+        // suggest adding an explicit lifetime bound to it.
+        let type_param_span = match (self.in_progress_tables, bound_kind) {
+            (Some(ref table), GenericKind::Param(ref param)) => {
+                let table = table.borrow();
+                table.local_id_root.and_then(|did| {
+                    let generics = self.tcx.generics_of(did);
+                    // Account for the case where `did` corresponds to `Self`, which doesn't have
+                    // the expected type argument.
+                    if generics.types.len() > 0 {
+                        let type_param = generics.type_param(param);
+                        let hir = &self.tcx.hir;
+                        hir.as_local_node_id(type_param.def_id).map(|id| {
+                            // Get the `hir::TyParam` to verify wether it already has any bounds.
+                            // We do this to avoid suggesting code that ends up as `T: 'a'b`,
+                            // instead we suggest `T: 'a + 'b` in that case.
+                            let has_lifetimes = if let hir_map::NodeTyParam(ref p) = hir.get(id) {
+                                p.bounds.len() > 0
+                            } else {
+                                false
+                            };
+                            let sp = hir.span(id);
+                            // `sp` only covers `T`, change it so that it covers
+                            // `T:` when appropriate
+                            let sp = if has_lifetimes {
+                                sp.to(sp.next_point().next_point())
+                            } else {
+                                sp
+                            };
+                            (sp, has_lifetimes)
+                        })
+                    } else {
+                        None
+                    }
+                })
+            }
+            _ => None,
+        };
 
         let labeled_user_string = match bound_kind {
             GenericKind::Param(ref p) =>
@@ -810,6 +844,26 @@ impl<'a, 'gcx, 'tcx> InferCtxt<'a, 'gcx, 'tcx> {
             return;
         }
 
+        fn binding_suggestion<'tcx, S: fmt::Display>(err: &mut DiagnosticBuilder<'tcx>,
+                                                     type_param_span: Option<(Span, bool)>,
+                                                     bound_kind: GenericKind<'tcx>,
+                                                     sub: S) {
+            let consider = &format!("consider adding an explicit lifetime bound `{}: {}`...",
+                                    bound_kind,
+                                    sub);
+            if let Some((sp, has_lifetimes)) = type_param_span {
+                let tail = if has_lifetimes {
+                    " + "
+                } else {
+                    ""
+                };
+                let suggestion = format!("{}: {}{}", bound_kind, sub, tail);
+                err.span_suggestion_short(sp, consider, suggestion);
+            } else {
+                err.help(consider);
+            }
+        }
+
         let mut err = match *sub {
             ty::ReEarlyBound(_) |
             ty::ReFree(ty::FreeRegion {bound_region: ty::BrNamed(..), ..}) => {
@@ -819,9 +873,7 @@ impl<'a, 'gcx, 'tcx> InferCtxt<'a, 'gcx, 'tcx> {
                                                E0309,
                                                "{} may not live long enough",
                                                labeled_user_string);
-                err.help(&format!("consider adding an explicit lifetime bound `{}: {}`...",
-                         bound_kind,
-                         sub));
+                binding_suggestion(&mut err, type_param_span, bound_kind, sub);
                 err
             }
 
@@ -832,9 +884,7 @@ impl<'a, 'gcx, 'tcx> InferCtxt<'a, 'gcx, 'tcx> {
                                                E0310,
                                                "{} may not live long enough",
                                                labeled_user_string);
-                err.help(&format!("consider adding an explicit lifetime \
-                                   bound `{}: 'static`...",
-                                  bound_kind));
+                binding_suggestion(&mut err, type_param_span, bound_kind, "'static");
                 err
             }
 
diff --git a/src/librustc/infer/error_reporting/named_anon_conflict.rs b/src/librustc/infer/error_reporting/named_anon_conflict.rs
index a3bbdab497a9b..80fb4ce8e0392 100644
--- a/src/librustc/infer/error_reporting/named_anon_conflict.rs
+++ b/src/librustc/infer/error_reporting/named_anon_conflict.rs
@@ -35,15 +35,17 @@ impl<'a, 'gcx, 'tcx> InferCtxt<'a, 'gcx, 'tcx> {
         // only introduced anonymous regions in parameters) as well as a
         // version new_ty of its type where the anonymous region is replaced
         // with the named one.//scope_def_id
-        let (named, anon_arg_info, region_info) =
+        let (named, anon, anon_arg_info, region_info) =
             if self.is_named_region(sub) && self.is_suitable_region(sup).is_some() &&
                self.find_arg_with_region(sup, sub).is_some() {
                 (sub,
+                 sup,
                  self.find_arg_with_region(sup, sub).unwrap(),
                  self.is_suitable_region(sup).unwrap())
             } else if self.is_named_region(sup) && self.is_suitable_region(sub).is_some() &&
                       self.find_arg_with_region(sub, sup).is_some() {
                 (sup,
+                 sub,
                  self.find_arg_with_region(sub, sup).unwrap(),
                  self.is_suitable_region(sub).unwrap())
             } else {
@@ -76,33 +78,29 @@ impl<'a, 'gcx, 'tcx> InferCtxt<'a, 'gcx, 'tcx> {
             return false;
         }
 
-        if self.is_return_type_anon(scope_def_id, br) {
-            debug!("try_report_named_anon_conflict: is_return_type_anon({:?}, {:?}) = true",
-                   scope_def_id,
-                   br);
-            return false;
-        } else if self.is_self_anon(is_first, scope_def_id) {
-            debug!("try_report_named_anon_conflict: is_self_anon({:?}, {:?}) = true",
-                   is_first,
-                   scope_def_id);
-            return false;
+        if let Some((_, fndecl)) = self.find_anon_type(anon, &br) {
+            if self.is_return_type_anon(scope_def_id, br, fndecl).is_some() ||
+               self.is_self_anon(is_first, scope_def_id) {
+                return false;
+            }
+        }
+
+        let (error_var, span_label_var) = if let Some(simple_name) = arg.pat.simple_name() {
+            (format!("the type of `{}`", simple_name), format!("the type of `{}`", simple_name))
         } else {
-            let (error_var, span_label_var) = if let Some(simple_name) = arg.pat.simple_name() {
-                (format!("the type of `{}`", simple_name), format!("the type of `{}`", simple_name))
-            } else {
-                ("parameter type".to_owned(), "type".to_owned())
-            };
+            ("parameter type".to_owned(), "type".to_owned())
+        };
+
+        struct_span_err!(self.tcx.sess,
+                         span,
+                         E0621,
+                         "explicit lifetime required in {}",
+                         error_var)
+                .span_label(arg.pat.span,
+                            format!("consider changing {} to `{}`", span_label_var, new_ty))
+                .span_label(span, format!("lifetime `{}` required", named))
+                .emit();
+        return true;
 
-            struct_span_err!(self.tcx.sess,
-                             span,
-                             E0621,
-                             "explicit lifetime required in {}",
-                             error_var)
-                    .span_label(arg.pat.span,
-                                format!("consider changing {} to `{}`", span_label_var, new_ty))
-                    .span_label(span, format!("lifetime `{}` required", named))
-                    .emit();
-            return true;
-        }
     }
 }
diff --git a/src/librustc/infer/error_reporting/util.rs b/src/librustc/infer/error_reporting/util.rs
index 94faec464b244..47db3f1b7926a 100644
--- a/src/librustc/infer/error_reporting/util.rs
+++ b/src/librustc/infer/error_reporting/util.rs
@@ -15,6 +15,7 @@ use infer::InferCtxt;
 use ty::{self, Region, Ty};
 use hir::def_id::DefId;
 use hir::map as hir_map;
+use syntax_pos::Span;
 
 macro_rules! or_false {
      ($v:expr) => {
@@ -163,7 +164,11 @@ impl<'a, 'gcx, 'tcx> InferCtxt<'a, 'gcx, 'tcx> {
     // Here, we check for the case where the anonymous region
     // is in the return type.
     // FIXME(#42703) - Need to handle certain cases here.
-    pub fn is_return_type_anon(&self, scope_def_id: DefId, br: ty::BoundRegion) -> bool {
+    pub fn is_return_type_anon(&self,
+                               scope_def_id: DefId,
+                               br: ty::BoundRegion,
+                               decl: &hir::FnDecl)
+                               -> Option<Span> {
         let ret_ty = self.tcx.type_of(scope_def_id);
         match ret_ty.sty {
             ty::TyFnDef(_, _) => {
@@ -171,12 +176,12 @@ impl<'a, 'gcx, 'tcx> InferCtxt<'a, 'gcx, 'tcx> {
                 let late_bound_regions = self.tcx
                     .collect_referenced_late_bound_regions(&sig.output());
                 if late_bound_regions.iter().any(|r| *r == br) {
-                    return true;
+                    return Some(decl.output.span());
                 }
             }
             _ => {}
         }
-        false
+        None
     }
     // Here we check for the case where anonymous region
     // corresponds to self and if yes, we display E0312.
diff --git a/src/librustc/middle/dead.rs b/src/librustc/middle/dead.rs
index 66a425a2d476b..a9d9f6f28ec0d 100644
--- a/src/librustc/middle/dead.rs
+++ b/src/librustc/middle/dead.rs
@@ -553,9 +553,22 @@ impl<'a, 'tcx> Visitor<'tcx> for DeadVisitor<'a, 'tcx> {
 
     fn visit_item(&mut self, item: &'tcx hir::Item) {
         if self.should_warn_about_item(item) {
+            // For items that have a definition with a signature followed by a
+            // block, point only at the signature.
+            let span = match item.node {
+                hir::ItemFn(..) |
+                hir::ItemMod(..) |
+                hir::ItemEnum(..) |
+                hir::ItemStruct(..) |
+                hir::ItemUnion(..) |
+                hir::ItemTrait(..) |
+                hir::ItemDefaultImpl(..) |
+                hir::ItemImpl(..) => self.tcx.sess.codemap().def_span(item.span),
+                _ => item.span,
+            };
             self.warn_dead_code(
                 item.id,
-                item.span,
+                span,
                 item.name,
                 item.node.descriptive_variant()
             );
@@ -570,8 +583,7 @@ impl<'a, 'tcx> Visitor<'tcx> for DeadVisitor<'a, 'tcx> {
                      g: &'tcx hir::Generics,
                      id: ast::NodeId) {
         if self.should_warn_about_variant(&variant.node) {
-            self.warn_dead_code(variant.node.data.id(), variant.span,
-                                variant.node.name, "variant");
+            self.warn_dead_code(variant.node.data.id(), variant.span, variant.node.name, "variant");
         } else {
             intravisit::walk_variant(self, variant, g, id);
         }
@@ -596,15 +608,17 @@ impl<'a, 'tcx> Visitor<'tcx> for DeadVisitor<'a, 'tcx> {
         match impl_item.node {
             hir::ImplItemKind::Const(_, body_id) => {
                 if !self.symbol_is_live(impl_item.id, None) {
-                    self.warn_dead_code(impl_item.id, impl_item.span,
-                                        impl_item.name, "associated const");
+                    self.warn_dead_code(impl_item.id,
+                                        impl_item.span,
+                                        impl_item.name,
+                                        "associated const");
                 }
                 self.visit_nested_body(body_id)
             }
             hir::ImplItemKind::Method(_, body_id) => {
                 if !self.symbol_is_live(impl_item.id, None) {
-                    self.warn_dead_code(impl_item.id, impl_item.span,
-                                        impl_item.name, "method");
+                    let span = self.tcx.sess.codemap().def_span(impl_item.span);
+                    self.warn_dead_code(impl_item.id, span, impl_item.name, "method");
                 }
                 self.visit_nested_body(body_id)
             }
diff --git a/src/librustc/middle/free_region.rs b/src/librustc/middle/free_region.rs
index 4de86b669160e..49a241b86e015 100644
--- a/src/librustc/middle/free_region.rs
+++ b/src/librustc/middle/free_region.rs
@@ -117,7 +117,7 @@ impl<'a, 'gcx, 'tcx> RegionRelations<'a, 'gcx, 'tcx> {
     }
 }
 
-#[derive(Clone, RustcEncodable, RustcDecodable)]
+#[derive(Clone, RustcEncodable, RustcDecodable, Debug)]
 pub struct FreeRegionMap<'tcx> {
     // Stores the relation `a < b`, where `a` and `b` are regions.
     //
diff --git a/src/librustc/middle/region.rs b/src/librustc/middle/region.rs
index cede0c2b9a2c2..59c9e8b4c432c 100644
--- a/src/librustc/middle/region.rs
+++ b/src/librustc/middle/region.rs
@@ -293,7 +293,7 @@ impl Scope {
 }
 
 /// The region scope tree encodes information about region relationships.
-#[derive(Default)]
+#[derive(Default, Debug)]
 pub struct ScopeTree {
     /// If not empty, this body is the root of this region hierarchy.
     root_body: Option<hir::HirId>,
diff --git a/src/librustc/session/config.rs b/src/librustc/session/config.rs
index d3256357941f3..153d8c3a152ab 100644
--- a/src/librustc/session/config.rs
+++ b/src/librustc/session/config.rs
@@ -350,6 +350,9 @@ top_level_options!(
         // is currently just a hack and will be removed eventually, so please
         // try to not rely on this too much.
         actually_rustdoc: bool [TRACKED],
+
+        // Number of object files/codegen units to produce on the backend
+        codegen_units: usize [UNTRACKED],
     }
 );
 
@@ -512,6 +515,7 @@ pub fn basic_options() -> Options {
         unstable_features: UnstableFeatures::Disallow,
         debug_assertions: true,
         actually_rustdoc: false,
+        codegen_units: 1,
     }
 }
 
@@ -529,11 +533,6 @@ impl Options {
             (self.debugging_opts.query_dep_graph || self.debugging_opts.incremental_info)
     }
 
-    pub fn single_codegen_unit(&self) -> bool {
-        self.incremental.is_none() ||
-        self.cg.codegen_units == 1
-    }
-
     pub fn file_path_mapping(&self) -> FilePathMapping {
         FilePathMapping::new(
             self.debugging_opts.remap_path_prefix_from.iter().zip(
@@ -791,7 +790,7 @@ macro_rules! options {
         fn parse_opt_uint(slot: &mut Option<usize>, v: Option<&str>) -> bool {
             match v {
                 Some(s) => { *slot = s.parse().ok(); slot.is_some() }
-                None => { *slot = None; true }
+                None => { *slot = None; false }
             }
         }
 
@@ -924,7 +923,7 @@ options! {CodegenOptions, CodegenSetter, basic_codegen_options,
          "metadata to mangle symbol names with"),
     extra_filename: String = ("".to_string(), parse_string, [UNTRACKED],
          "extra data to put in each output filename"),
-    codegen_units: usize = (1, parse_uint, [UNTRACKED],
+    codegen_units: Option<usize> = (None, parse_opt_uint, [UNTRACKED],
         "divide crate into N units to optimize in parallel"),
     remark: Passes = (SomePasses(Vec::new()), parse_passes, [UNTRACKED],
         "print remarks for these optimization passes (space separated, or \"all\")"),
@@ -1373,20 +1372,20 @@ pub fn rustc_optgroups() -> Vec<RustcOptGroup> {
                                  always = always colorize output;
                                  never  = never colorize output", "auto|always|never"),
 
-        opt::flagopt("", "pretty",
-                     "Pretty-print the input instead of compiling;
-                      valid types are: `normal` (un-annotated source),
-                      `expanded` (crates expanded), or
-                      `expanded,identified` (fully parenthesized, AST nodes with IDs).",
-                     "TYPE"),
-        opt::flagopt("", "unpretty",
-                     "Present the input source, unstable (and less-pretty) variants;
-                      valid types are any of the types for `--pretty`, as well as:
-                      `flowgraph=<nodeid>` (graphviz formatted flowgraph for node),
-                      `everybody_loops` (all function bodies replaced with `loop {}`),
-                      `hir` (the HIR), `hir,identified`, or
-                      `hir,typed` (HIR with types for each node).",
-                     "TYPE"),
+        opt::opt("", "pretty",
+                 "Pretty-print the input instead of compiling;
+                  valid types are: `normal` (un-annotated source),
+                  `expanded` (crates expanded), or
+                  `expanded,identified` (fully parenthesized, AST nodes with IDs).",
+                 "TYPE"),
+        opt::opt("", "unpretty",
+                 "Present the input source, unstable (and less-pretty) variants;
+                  valid types are any of the types for `--pretty`, as well as:
+                  `flowgraph=<nodeid>` (graphviz formatted flowgraph for node),
+                  `everybody_loops` (all function bodies replaced with `loop {}`),
+                  `hir` (the HIR), `hir,identified`, or
+                  `hir,typed` (HIR with types for each node).",
+                 "TYPE"),
     ]);
     opts
 }
@@ -1521,27 +1520,35 @@ pub fn build_session_options_and_crate_config(matches: &getopts::Matches)
     }
 
     let mut cg = build_codegen_options(matches, error_format);
+    let mut codegen_units = cg.codegen_units;
 
     // Issue #30063: if user requests llvm-related output to one
     // particular path, disable codegen-units.
-    if matches.opt_present("o") && cg.codegen_units != 1 {
-        let incompatible: Vec<_> = output_types.iter()
-            .map(|ot_path| ot_path.0)
-            .filter(|ot| {
-                !ot.is_compatible_with_codegen_units_and_single_output_file()
-            }).collect();
-        if !incompatible.is_empty() {
-            for ot in &incompatible {
-                early_warn(error_format, &format!("--emit={} with -o incompatible with \
-                                                 -C codegen-units=N for N > 1",
-                                                ot.shorthand()));
+    let incompatible: Vec<_> = output_types.iter()
+        .map(|ot_path| ot_path.0)
+        .filter(|ot| {
+            !ot.is_compatible_with_codegen_units_and_single_output_file()
+        })
+        .map(|ot| ot.shorthand())
+        .collect();
+    if !incompatible.is_empty() {
+        match codegen_units {
+            Some(n) if n > 1 => {
+                if matches.opt_present("o") {
+                    for ot in &incompatible {
+                        early_warn(error_format, &format!("--emit={} with -o incompatible with \
+                                                         -C codegen-units=N for N > 1",
+                                                        ot));
+                    }
+                    early_warn(error_format, "resetting to default -C codegen-units=1");
+                    codegen_units = Some(1);
+                }
             }
-            early_warn(error_format, "resetting to default -C codegen-units=1");
-            cg.codegen_units = 1;
+            _ => codegen_units = Some(1),
         }
     }
 
-    if cg.codegen_units < 1 {
+    if codegen_units == Some(0) {
         early_error(error_format, "Value for codegen units must be a positive nonzero integer");
     }
 
@@ -1550,12 +1557,17 @@ pub fn build_session_options_and_crate_config(matches: &getopts::Matches)
     // case, but it would be confusing to have the validity of
     // `-Z lto -C codegen-units=2` depend on details of the crate being
     // compiled, so we complain regardless.
-    if cg.lto && cg.codegen_units > 1 {
-        // This case is impossible to handle because LTO expects to be able
-        // to combine the entire crate and all its dependencies into a
-        // single compilation unit, but each codegen unit is in a separate
-        // LLVM context, so they can't easily be combined.
-        early_error(error_format, "can't perform LTO when using multiple codegen units");
+    if cg.lto {
+        if let Some(n) = codegen_units {
+            if n > 1 {
+                // This case is impossible to handle because LTO expects to be able
+                // to combine the entire crate and all its dependencies into a
+                // single compilation unit, but each codegen unit is in a separate
+                // LLVM context, so they can't easily be combined.
+                early_error(error_format, "can't perform LTO when using multiple codegen units");
+            }
+        }
+        codegen_units = Some(1);
     }
 
     if cg.lto && debugging_opts.incremental.is_some() {
@@ -1720,6 +1732,34 @@ pub fn build_session_options_and_crate_config(matches: &getopts::Matches)
 
     let incremental = debugging_opts.incremental.as_ref().map(|m| PathBuf::from(m));
 
+    let codegen_units = codegen_units.unwrap_or_else(|| {
+        match opt_level {
+            // If we're compiling at `-O0` then default to 32 codegen units.
+            // The number here shouldn't matter too too much as debug mode
+            // builds don't rely on performance at all, meaning that lost
+            // opportunities for inlining through multiple codegen units is
+            // a non-issue.
+            //
+            // Note that the high number here doesn't mean that we'll be
+            // spawning a large number of threads in parallel. The backend
+            // of rustc contains global rate limiting through the
+            // `jobserver` crate so we'll never overload the system with too
+            // much work, but rather we'll only be optimizing when we're
+            // otherwise cooperating with other instances of rustc.
+            //
+            // Rather the high number here means that we should be able to
+            // keep a lot of idle cpus busy. By ensuring that no codegen
+            // unit takes *too* long to build we'll be guaranteed that all
+            // cpus will finish pretty closely to one another and we should
+            // make relatively optimal use of system resources
+            OptLevel::No => 32,
+
+            // All other optimization levels default use one codegen unit,
+            // the historical default in Rust for a Long Time.
+            _ => 1,
+        }
+    });
+
     (Options {
         crate_types,
         optimize: opt_level,
@@ -1744,6 +1784,7 @@ pub fn build_session_options_and_crate_config(matches: &getopts::Matches)
         unstable_features: UnstableFeatures::from_environment(),
         debug_assertions,
         actually_rustdoc: false,
+        codegen_units,
     },
     cfg)
 }
@@ -2447,7 +2488,7 @@ mod tests {
         opts.cg.extra_filename = String::from("extra-filename");
         assert_eq!(reference.dep_tracking_hash(), opts.dep_tracking_hash());
 
-        opts.cg.codegen_units = 42;
+        opts.cg.codegen_units = Some(42);
         assert_eq!(reference.dep_tracking_hash(), opts.dep_tracking_hash());
 
         opts.cg.remark = super::SomePasses(vec![String::from("pass1"),
diff --git a/src/librustc/ty/context.rs b/src/librustc/ty/context.rs
index 054c5e122df7a..315ba622ccf6d 100644
--- a/src/librustc/ty/context.rs
+++ b/src/librustc/ty/context.rs
@@ -315,7 +315,7 @@ impl<'a, V> LocalTableInContextMut<'a, V> {
     }
 }
 
-#[derive(RustcEncodable, RustcDecodable)]
+#[derive(RustcEncodable, RustcDecodable, Debug)]
 pub struct TypeckTables<'tcx> {
     /// The HirId::owner all ItemLocalIds in this table are relative to.
     pub local_id_root: Option<DefId>,
diff --git a/src/librustc/ty/mod.rs b/src/librustc/ty/mod.rs
index 2c1b3e28ffb00..da635ec80fc91 100644
--- a/src/librustc/ty/mod.rs
+++ b/src/librustc/ty/mod.rs
@@ -675,6 +675,8 @@ pub struct TypeParameterDef {
     /// on generic parameter `T`, asserts data behind the parameter
     /// `T` won't be accessed during the parent type's `Drop` impl.
     pub pure_wrt_drop: bool,
+
+    pub synthetic: Option<hir::SyntheticTyParamKind>,
 }
 
 #[derive(Copy, Clone, RustcEncodable, RustcDecodable)]
diff --git a/src/librustc_back/target/aarch64_unknown_linux_musl.rs b/src/librustc_back/target/aarch64_unknown_linux_musl.rs
new file mode 100644
index 0000000000000..1edac616366dd
--- /dev/null
+++ b/src/librustc_back/target/aarch64_unknown_linux_musl.rs
@@ -0,0 +1,36 @@
+// Copyright 2017 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+use LinkerFlavor;
+use target::{Target, TargetOptions, TargetResult};
+
+pub fn target() -> TargetResult {
+    let mut base = super::linux_musl_base::opts();
+    base.max_atomic_width = Some(128);
+
+    // see #36994
+    base.exe_allocation_crate = None;
+
+    Ok(Target {
+        llvm_target: "aarch64-unknown-linux-musl".to_string(),
+        target_endian: "little".to_string(),
+        target_pointer_width: "64".to_string(),
+        target_env: "musl".to_string(),
+        data_layout: "e-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128".to_string(),
+        arch: "aarch64".to_string(),
+        target_os: "linux".to_string(),
+        target_vendor: "unknown".to_string(),
+        linker_flavor: LinkerFlavor::Gcc,
+        options: TargetOptions {
+            abi_blacklist: super::arm_base::abi_blacklist(),
+            .. base
+        },
+    })
+}
diff --git a/src/librustc_back/target/mod.rs b/src/librustc_back/target/mod.rs
index 301cf3f8c8208..27a0855dc29fe 100644
--- a/src/librustc_back/target/mod.rs
+++ b/src/librustc_back/target/mod.rs
@@ -153,6 +153,7 @@ supported_targets! {
     ("armv7-unknown-linux-gnueabihf", armv7_unknown_linux_gnueabihf),
     ("armv7-unknown-linux-musleabihf", armv7_unknown_linux_musleabihf),
     ("aarch64-unknown-linux-gnu", aarch64_unknown_linux_gnu),
+    ("aarch64-unknown-linux-musl", aarch64_unknown_linux_musl),
     ("x86_64-unknown-linux-musl", x86_64_unknown_linux_musl),
     ("i686-unknown-linux-musl", i686_unknown_linux_musl),
     ("mips-unknown-linux-musl", mips_unknown_linux_musl),
diff --git a/src/librustc_data_structures/bitvec.rs b/src/librustc_data_structures/bitvec.rs
index 7331016c2d26c..e8f9a6720872d 100644
--- a/src/librustc_data_structures/bitvec.rs
+++ b/src/librustc_data_structures/bitvec.rs
@@ -138,7 +138,7 @@ impl FromIterator<bool> for BitVector {
 /// A "bit matrix" is basically a matrix of booleans represented as
 /// one gigantic bitvector. In other words, it is as if you have
 /// `rows` bitvectors, each of length `columns`.
-#[derive(Clone)]
+#[derive(Clone, Debug)]
 pub struct BitMatrix {
     columns: usize,
     vector: Vec<u64>,
diff --git a/src/librustc_data_structures/transitive_relation.rs b/src/librustc_data_structures/transitive_relation.rs
index 46463944043bd..7cb386b019798 100644
--- a/src/librustc_data_structures/transitive_relation.rs
+++ b/src/librustc_data_structures/transitive_relation.rs
@@ -18,7 +18,7 @@ use std::hash::Hash;
 use std::mem;
 
 
-#[derive(Clone)]
+#[derive(Clone, Debug)]
 pub struct TransitiveRelation<T: Clone + Debug + Eq + Hash + Clone> {
     // List of elements. This is used to map from a T to a usize.
     elements: Vec<T>,
@@ -42,10 +42,10 @@ pub struct TransitiveRelation<T: Clone + Debug + Eq + Hash + Clone> {
     closure: RefCell<Option<BitMatrix>>,
 }
 
-#[derive(Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash, RustcEncodable, RustcDecodable)]
+#[derive(Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash, RustcEncodable, RustcDecodable, Debug)]
 struct Index(usize);
 
-#[derive(Clone, PartialEq, Eq, RustcEncodable, RustcDecodable)]
+#[derive(Clone, PartialEq, Eq, RustcEncodable, RustcDecodable, Debug)]
 struct Edge {
     source: Index,
     target: Index,
diff --git a/src/librustc_incremental/persist/data.rs b/src/librustc_incremental/persist/data.rs
index 06acfb5d77807..9050702e3ca71 100644
--- a/src/librustc_incremental/persist/data.rs
+++ b/src/librustc_incremental/persist/data.rs
@@ -70,14 +70,6 @@ impl SerializedDepGraph {
          RustcEncodable, RustcDecodable)]
 pub struct DepNodeIndex(pub u32);
 
-impl DepNodeIndex {
-    #[inline]
-    pub fn new(idx: usize) -> DepNodeIndex {
-        assert!(idx <= ::std::u32::MAX as usize);
-        DepNodeIndex(idx as u32)
-    }
-}
-
 impl Idx for DepNodeIndex {
     #[inline]
     fn new(idx: usize) -> Self {
diff --git a/src/librustc_incremental/persist/save.rs b/src/librustc_incremental/persist/save.rs
index 83a618211dad3..fd699229f1b73 100644
--- a/src/librustc_incremental/persist/save.rs
+++ b/src/librustc_incremental/persist/save.rs
@@ -19,7 +19,7 @@ use rustc::util::common::time;
 use rustc::util::nodemap::DefIdMap;
 use rustc_data_structures::fx::FxHashMap;
 use rustc_data_structures::graph;
-use rustc_data_structures::indexed_vec::IndexVec;
+use rustc_data_structures::indexed_vec::{IndexVec, Idx};
 use rustc_serialize::Encodable as RustcEncodable;
 use rustc_serialize::opaque::Encoder;
 use std::io::{self, Cursor, Write};
diff --git a/src/librustc_llvm/Cargo.toml b/src/librustc_llvm/Cargo.toml
index 1ed2cbab65fc4..de5add56b761d 100644
--- a/src/librustc_llvm/Cargo.toml
+++ b/src/librustc_llvm/Cargo.toml
@@ -18,4 +18,4 @@ rustc_cratesio_shim = { path = "../librustc_cratesio_shim" }
 
 [build-dependencies]
 build_helper = { path = "../build_helper" }
-gcc = "0.3.50"
+cc = "1.0"
diff --git a/src/librustc_llvm/build.rs b/src/librustc_llvm/build.rs
index 393aa7fa43bab..dde7a38efc796 100644
--- a/src/librustc_llvm/build.rs
+++ b/src/librustc_llvm/build.rs
@@ -8,7 +8,7 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-extern crate gcc;
+extern crate cc;
 extern crate build_helper;
 
 use std::process::Command;
@@ -136,7 +136,7 @@ fn main() {
     let mut cmd = Command::new(&llvm_config);
     cmd.arg("--cxxflags");
     let cxxflags = output(&mut cmd);
-    let mut cfg = gcc::Build::new();
+    let mut cfg = cc::Build::new();
     cfg.warnings(false);
     for flag in cxxflags.split_whitespace() {
         // Ignore flags like `-m64` when we're doing a cross build
diff --git a/src/librustc_mir/borrow_check.rs b/src/librustc_mir/borrow_check.rs
index 9e261d6024891..902e2de841f26 100644
--- a/src/librustc_mir/borrow_check.rs
+++ b/src/librustc_mir/borrow_check.rs
@@ -412,7 +412,7 @@ impl<'c, 'b, 'a: 'b+'c, 'gcx, 'tcx: 'a> MirBorrowckCtxt<'c, 'b, 'a, 'gcx, 'tcx>
                             WriteKind::StorageDead |
                             WriteKind::Mutate =>
                                 this.report_illegal_mutation_of_borrowed(
-                                    context, lvalue_span),
+                                    context, lvalue_span, borrow),
                             WriteKind::Move =>
                                 this.report_move_out_while_borrowed(
                                     context, lvalue_span, borrow),
@@ -580,7 +580,19 @@ impl<'c, 'b, 'a: 'b+'c, 'gcx, 'tcx: 'a> MirBorrowckCtxt<'c, 'b, 'a, 'gcx, 'tcx>
             if flow_state.inits.curr_state.contains(&mpi) {
                 // may already be assigned before reaching this statement;
                 // report error.
-                self.report_illegal_reassignment(context, (lvalue, span));
+                // FIXME: Not ideal, it only finds the assignment that lexically comes first
+                let assigned_lvalue = &move_data.move_paths[mpi].lvalue;
+                let assignment_stmt = self.mir.basic_blocks().iter().filter_map(|bb| {
+                    bb.statements.iter().find(|stmt| {
+                        if let StatementKind::Assign(ref lv, _) = stmt.kind {
+                            *lv == *assigned_lvalue
+                        } else {
+                            false
+                        }
+                    })
+                }).next().unwrap();
+                self.report_illegal_reassignment(
+                    context, (lvalue, span), assignment_stmt.source_info.span);
             }
         }
     }
@@ -975,18 +987,33 @@ impl<'c, 'b, 'a: 'b+'c, 'gcx, 'tcx: 'a> MirBorrowckCtxt<'c, 'b, 'a, 'gcx, 'tcx>
         err.emit();
     }
 
-    fn report_illegal_mutation_of_borrowed(&mut self, _: Context, (lvalue, span): (&Lvalue, Span)) {
+    fn report_illegal_mutation_of_borrowed(&mut self,
+                                           _: Context,
+                                           (lvalue, span): (&Lvalue, Span),
+                                           loan: &BorrowData) {
+        let describe_lvalue = self.describe_lvalue(lvalue);
+        let borrow_span = self.retrieve_borrow_span(loan);
+
         let mut err = self.tcx.cannot_assign_to_borrowed(
             span, &self.describe_lvalue(lvalue), Origin::Mir);
-        // FIXME: add span labels for borrow and assignment points
+
+        err.span_label(borrow_span, format!("borrow of `{}` occurs here", describe_lvalue));
+        err.span_label(span, format!("assignment to borrowed `{}` occurs here", describe_lvalue));
+
         err.emit();
     }
 
-    fn report_illegal_reassignment(&mut self, _context: Context, (lvalue, span): (&Lvalue, Span)) {
-        let mut err = self.tcx.cannot_reassign_immutable(
-            span, &self.describe_lvalue(lvalue), Origin::Mir);
-        // FIXME: add span labels for borrow and assignment points
-        err.emit();
+    fn report_illegal_reassignment(&mut self,
+                                   _context: Context,
+                                   (lvalue, span): (&Lvalue, Span),
+                                   assigned_span: Span) {
+        self.tcx.cannot_reassign_immutable(span,
+                                           &self.describe_lvalue(lvalue),
+                                           Origin::Mir)
+                .span_label(span, "re-assignment of immutable variable")
+                .span_label(assigned_span, format!("first assignment to `{}`",
+                                                   self.describe_lvalue(lvalue)))
+                .emit();
     }
 
     fn report_assignment_to_static(&mut self, _context: Context, (lvalue, span): (&Lvalue, Span)) {
diff --git a/src/librustc_mir/transform/nll.rs b/src/librustc_mir/transform/nll/mod.rs
similarity index 100%
rename from src/librustc_mir/transform/nll.rs
rename to src/librustc_mir/transform/nll/mod.rs
diff --git a/src/librustc_trans/Cargo.toml b/src/librustc_trans/Cargo.toml
index 6f1f5b4a123d8..482350d04b5a7 100644
--- a/src/librustc_trans/Cargo.toml
+++ b/src/librustc_trans/Cargo.toml
@@ -32,4 +32,4 @@ syntax = { path = "../libsyntax" }
 syntax_pos = { path = "../libsyntax_pos" }
 
 [target."cfg(windows)".dependencies]
-gcc = "0.3.50"
+cc = "1.0"
diff --git a/src/librustc_trans/back/link.rs b/src/librustc_trans/back/link.rs
index 1630e7759919c..619ea59ff1a2e 100644
--- a/src/librustc_trans/back/link.rs
+++ b/src/librustc_trans/back/link.rs
@@ -125,7 +125,7 @@ pub fn get_linker(sess: &Session) -> (String, Command, Vec<(OsString, OsString)>
 
 #[cfg(windows)]
 pub fn msvc_link_exe_cmd(sess: &Session) -> (Command, Vec<(OsString, OsString)>) {
-    use gcc::windows_registry;
+    use cc::windows_registry;
 
     let target = &sess.opts.target_triple;
     let tool = windows_registry::find_tool(target, "link.exe");
@@ -509,7 +509,7 @@ fn link_rlib<'a>(sess: &'a Session,
                 // of when we do and don't keep .#module-name#.bc files around.
                 let user_wants_numbered_bitcode =
                         sess.opts.output_types.contains_key(&OutputType::Bitcode) &&
-                        sess.opts.cg.codegen_units > 1;
+                        sess.opts.codegen_units > 1;
                 if !sess.opts.cg.save_temps && !user_wants_numbered_bitcode {
                     remove(sess, &bc_filename);
                 }
diff --git a/src/librustc_trans/back/write.rs b/src/librustc_trans/back/write.rs
index ef6bf2504f312..6b980a37ac778 100644
--- a/src/librustc_trans/back/write.rs
+++ b/src/librustc_trans/back/write.rs
@@ -939,10 +939,10 @@ fn produce_final_output_artifacts(sess: &Session,
         let needs_crate_object = crate_output.outputs.contains_key(&OutputType::Exe);
 
         let keep_numbered_bitcode = needs_crate_bitcode ||
-                (user_wants_bitcode && sess.opts.cg.codegen_units > 1);
+                (user_wants_bitcode && sess.opts.codegen_units > 1);
 
         let keep_numbered_objects = needs_crate_object ||
-                (user_wants_objects && sess.opts.cg.codegen_units > 1);
+                (user_wants_objects && sess.opts.codegen_units > 1);
 
         for module in compiled_modules.modules.iter() {
             let module_name = Some(&module.name[..]);
@@ -1520,6 +1520,11 @@ fn start_executing_work(tcx: TyCtxt,
                                     total_llvm_time);
         }
 
+        // Regardless of what order these modules completed in, report them to
+        // the backend in the same order every time to ensure that we're handing
+        // out deterministic results.
+        compiled_modules.sort_by(|a, b| a.name.cmp(&b.name));
+
         let compiled_metadata_module = compiled_metadata_module
             .expect("Metadata module not compiled?");
 
@@ -1853,7 +1858,7 @@ impl OngoingCrateTranslation {
 
         // FIXME: time_llvm_passes support - does this use a global context or
         // something?
-        if sess.opts.cg.codegen_units == 1 && sess.time_llvm_passes() {
+        if sess.opts.codegen_units == 1 && sess.time_llvm_passes() {
             unsafe { llvm::LLVMRustPrintPassTimings(); }
         }
 
diff --git a/src/librustc_trans/base.rs b/src/librustc_trans/base.rs
index 2d01d2947d6eb..774acc813438f 100644
--- a/src/librustc_trans/base.rs
+++ b/src/librustc_trans/base.rs
@@ -1162,7 +1162,7 @@ fn collect_and_partition_translation_items<'a, 'tcx>(
     let strategy = if tcx.sess.opts.debugging_opts.incremental.is_some() {
         PartitioningStrategy::PerModule
     } else {
-        PartitioningStrategy::FixedUnitCount(tcx.sess.opts.cg.codegen_units)
+        PartitioningStrategy::FixedUnitCount(tcx.sess.opts.codegen_units)
     };
 
     let codegen_units = time(time_passes, "codegen unit partitioning", || {
@@ -1175,7 +1175,7 @@ fn collect_and_partition_translation_items<'a, 'tcx>(
             .collect::<Vec<_>>()
     });
 
-    assert!(tcx.sess.opts.cg.codegen_units == codegen_units.len() ||
+    assert!(tcx.sess.opts.codegen_units == codegen_units.len() ||
             tcx.sess.opts.debugging_opts.incremental.is_some());
 
     let translation_items: DefIdSet = items.iter().filter_map(|trans_item| {
diff --git a/src/librustc_trans/lib.rs b/src/librustc_trans/lib.rs
index 8a2c478cea061..796dfd4417c6a 100644
--- a/src/librustc_trans/lib.rs
+++ b/src/librustc_trans/lib.rs
@@ -61,7 +61,7 @@ extern crate syntax_pos;
 extern crate rustc_errors as errors;
 extern crate serialize;
 #[cfg(windows)]
-extern crate gcc; // Used to locate MSVC, not gcc :)
+extern crate cc; // Used to locate MSVC
 
 pub use base::trans_crate;
 
diff --git a/src/librustc_typeck/check/mod.rs b/src/librustc_typeck/check/mod.rs
index 6fe49644fe81e..a0099a48c896b 100644
--- a/src/librustc_typeck/check/mod.rs
+++ b/src/librustc_typeck/check/mod.rs
@@ -4647,6 +4647,7 @@ impl<'a, 'gcx, 'tcx> FnCtxt<'a, 'gcx, 'tcx> {
         // a problem.
         self.check_path_parameter_count(span, &mut type_segment, false);
         self.check_path_parameter_count(span, &mut fn_segment, false);
+        self.check_impl_trait(span, &mut fn_segment);
 
         let (fn_start, has_self) = match (type_segment, fn_segment) {
             (_, Some((_, generics))) => {
@@ -4871,6 +4872,36 @@ impl<'a, 'gcx, 'tcx> FnCtxt<'a, 'gcx, 'tcx> {
         }
     }
 
+    /// Report error if there is an explicit type parameter when using `impl Trait`.
+    fn check_impl_trait(&self,
+                        span: Span,
+                        segment: &mut Option<(&hir::PathSegment, &ty::Generics)>) {
+        use hir::SyntheticTyParamKind::*;
+
+        segment.map(|(path_segment, generics)| {
+            let explicit = !path_segment.infer_types;
+            let impl_trait = generics.types.iter()
+                                           .any(|ty_param| {
+                                               match ty_param.synthetic {
+                                                   Some(ImplTrait) => true,
+                                                   _ => false,
+                                               }
+                                           });
+
+            if explicit && impl_trait {
+                let mut err = struct_span_err! {
+                    self.tcx.sess,
+                    span,
+                    E0632,
+                    "cannot provide explicit type parameters when `impl Trait` is \
+                    used in argument position."
+                };
+
+                err.emit();
+            }
+        });
+    }
+
     fn structurally_resolve_type_or_else<F>(&self, sp: Span, ty: Ty<'tcx>, f: F)
                                             -> Ty<'tcx>
         where F: Fn() -> Ty<'tcx>
diff --git a/src/librustc_typeck/collect.rs b/src/librustc_typeck/collect.rs
index a36594cb6e557..25a37a2c48cdb 100644
--- a/src/librustc_typeck/collect.rs
+++ b/src/librustc_typeck/collect.rs
@@ -922,6 +922,7 @@ fn generics_of<'a, 'tcx>(tcx: TyCtxt<'a, 'tcx, 'tcx>,
                         has_default: false,
                         object_lifetime_default: rl::Set1::Empty,
                         pure_wrt_drop: false,
+                        synthetic: None,
                     });
 
                     allow_defaults = true;
@@ -993,6 +994,7 @@ fn generics_of<'a, 'tcx>(tcx: TyCtxt<'a, 'tcx, 'tcx>,
             object_lifetime_default:
                 object_lifetime_defaults.as_ref().map_or(rl::Set1::Empty, |o| o[i]),
             pure_wrt_drop: p.pure_wrt_drop,
+            synthetic: p.synthetic,
         }
     });
     let mut types: Vec<_> = opt_self.into_iter().chain(types).collect();
@@ -1009,6 +1011,7 @@ fn generics_of<'a, 'tcx>(tcx: TyCtxt<'a, 'tcx, 'tcx>,
                 has_default: false,
                 object_lifetime_default: rl::Set1::Empty,
                 pure_wrt_drop: false,
+                synthetic: None,
             }));
         });
     }
@@ -1329,6 +1332,12 @@ fn early_bound_lifetimes_from_generics<'a, 'tcx>(
 fn predicates_of<'a, 'tcx>(tcx: TyCtxt<'a, 'tcx, 'tcx>,
                            def_id: DefId)
                            -> ty::GenericPredicates<'tcx> {
+    explicit_predicates_of(tcx, def_id)
+}
+
+fn explicit_predicates_of<'a, 'tcx>(tcx: TyCtxt<'a, 'tcx, 'tcx>,
+                           def_id: DefId)
+                           -> ty::GenericPredicates<'tcx> {
     use rustc::hir::map::*;
     use rustc::hir::*;
 
diff --git a/src/librustc_typeck/diagnostics.rs b/src/librustc_typeck/diagnostics.rs
index 6bbe2233ff1fa..8df973555744b 100644
--- a/src/librustc_typeck/diagnostics.rs
+++ b/src/librustc_typeck/diagnostics.rs
@@ -4677,4 +4677,6 @@ register_diagnostics! {
     E0592, // duplicate definitions with name `{}`
 //  E0613, // Removed (merged with E0609)
     E0627, // yield statement outside of generator literal
+    E0632, // cannot provide explicit type parameters when `impl Trait` is used in
+           // argument position.
 }
diff --git a/src/librustdoc/Cargo.toml b/src/librustdoc/Cargo.toml
index 61ac541e2c139..b295b414a035b 100644
--- a/src/librustdoc/Cargo.toml
+++ b/src/librustdoc/Cargo.toml
@@ -18,4 +18,4 @@ html-diff = "0.0.4"
 
 [build-dependencies]
 build_helper = { path = "../build_helper" }
-gcc = "0.3.50"
+cc = "1.0"
diff --git a/src/librustdoc/build.rs b/src/librustdoc/build.rs
index 830492dec9482..97c9ca1e2d27c 100644
--- a/src/librustdoc/build.rs
+++ b/src/librustdoc/build.rs
@@ -9,12 +9,12 @@
 // except according to those terms.
 
 extern crate build_helper;
-extern crate gcc;
+extern crate cc;
 
 fn main() {
     let src_dir = std::path::Path::new("../rt/hoedown/src");
     build_helper::rerun_if_changed_anything_in_dir(src_dir);
-    let mut cfg = gcc::Build::new();
+    let mut cfg = cc::Build::new();
     cfg.file("../rt/hoedown/src/autolink.c")
        .file("../rt/hoedown/src/buffer.c")
        .file("../rt/hoedown/src/document.c")
diff --git a/src/librustdoc/html/highlight.rs b/src/librustdoc/html/highlight.rs
index 081f950e40db2..98863b229b511 100644
--- a/src/librustdoc/html/highlight.rs
+++ b/src/librustdoc/html/highlight.rs
@@ -249,8 +249,8 @@ impl<'a> Classifier<'a> {
                 token::BinOpEq(..) | token::FatArrow => Class::Op,
 
             // Miscellaneous, no highlighting.
-            token::Dot | token::DotDot | token::DotDotDot | token::Comma | token::Semi |
-                token::Colon | token::ModSep | token::LArrow | token::OpenDelim(_) |
+            token::Dot | token::DotDot | token::DotDotDot | token::DotDotEq | token::Comma |
+                token::Semi | token::Colon | token::ModSep | token::LArrow | token::OpenDelim(_) |
                 token::CloseDelim(token::Brace) | token::CloseDelim(token::Paren) |
                 token::CloseDelim(token::NoDelim) => Class::None,
 
@@ -353,7 +353,7 @@ impl<'a> Classifier<'a> {
             token::Lifetime(..) => Class::Lifetime,
 
             token::Underscore | token::Eof | token::Interpolated(..) |
-            token::Tilde | token::At => Class::None,
+            token::Tilde | token::At | token::DotEq => Class::None,
         };
 
         // Anything that didn't return above is the simple case where we the
diff --git a/src/libstd/Cargo.toml b/src/libstd/Cargo.toml
index 09c168169348b..fb276448ffac4 100644
--- a/src/libstd/Cargo.toml
+++ b/src/libstd/Cargo.toml
@@ -36,7 +36,7 @@ rustc_tsan = { path = "../librustc_tsan" }
 
 [build-dependencies]
 build_helper = { path = "../build_helper" }
-gcc = "0.3.50"
+cc = "1.0"
 
 [features]
 backtrace = []
diff --git a/src/libstd/build.rs b/src/libstd/build.rs
index b8061665aa164..7ca762c801a81 100644
--- a/src/libstd/build.rs
+++ b/src/libstd/build.rs
@@ -11,7 +11,7 @@
 #![deny(warnings)]
 
 extern crate build_helper;
-extern crate gcc;
+extern crate cc;
 
 use std::env;
 use std::process::Command;
@@ -77,7 +77,7 @@ fn main() {
 fn build_libbacktrace(host: &str, target: &str) -> Result<(), ()> {
     let native = native_lib_boilerplate("libbacktrace", "libbacktrace", "backtrace", ".libs")?;
 
-    let compiler = gcc::Build::new().get_compiler();
+    let compiler = cc::Build::new().get_compiler();
     // only msvc returns None for ar so unwrap is okay
     let ar = build_helper::cc2ar(compiler.path(), target).unwrap();
     let mut cflags = compiler.args().iter().map(|s| s.to_str().unwrap())
diff --git a/src/libstd/collections/hash/map.rs b/src/libstd/collections/hash/map.rs
index 96af227257824..7d000d7c859d3 100644
--- a/src/libstd/collections/hash/map.rs
+++ b/src/libstd/collections/hash/map.rs
@@ -691,6 +691,17 @@ impl<K, V, S> HashMap<K, V, S>
     /// Returns a reference to the map's [`BuildHasher`].
     ///
     /// [`BuildHasher`]: ../../std/hash/trait.BuildHasher.html
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// use std::collections::HashMap;
+    /// use std::collections::hash_map::RandomState;
+    ///
+    /// let hasher = RandomState::new();
+    /// let map: HashMap<isize, isize> = HashMap::with_hasher(hasher);
+    /// let hasher: &RandomState = map.hasher();
+    /// ```
     #[stable(feature = "hashmap_public_hasher", since = "1.9.0")]
     pub fn hasher(&self) -> &S {
         &self.hash_builder
@@ -2191,6 +2202,36 @@ impl<'a, K, V> OccupiedEntry<'a, K, V> {
     fn take_key(&mut self) -> Option<K> {
         self.key.take()
     }
+
+    /// Replaces the entry, returning the old key and value.
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// #![feature(map_entry_replace)]
+    /// use std::collections::HashMap;
+    /// use std::collections::hash_map::Entry;
+    ///
+    /// let mut map: HashMap<String, u32> = HashMap::new();
+    /// map.insert("poneyland".to_string(), 15);
+    ///
+    /// if let Entry::Occupied(entry) = map.entry("poneyland".to_string()) {
+    ///     let (old_key, old_value): (String, u32) = entry.replace(16);
+    ///     assert_eq!(old_key, "poneyland");
+    ///     assert_eq!(old_value, 15);
+    /// }
+    ///
+    /// assert_eq!(map.get("poneyland"), Some(&16));
+    /// ```
+    #[unstable(feature = "map_entry_replace", issue = "44286")]
+    pub fn replace(mut self, value: V) -> (K, V) {
+        let (old_key, old_value) = self.elem.read_mut();
+
+        let old_key = mem::replace(old_key, self.key.unwrap());
+        let old_value = mem::replace(old_value, value);
+
+        (old_key, old_value)
+    }
 }
 
 impl<'a, K: 'a, V: 'a> VacantEntry<'a, K, V> {
diff --git a/src/libstd/error.rs b/src/libstd/error.rs
index 6d64ea0d50332..166439692d4ed 100644
--- a/src/libstd/error.rs
+++ b/src/libstd/error.rs
@@ -56,6 +56,7 @@ use any::TypeId;
 use borrow::Cow;
 use cell;
 use char;
+use convert;
 use fmt::{self, Debug, Display};
 use mem::transmute;
 use num;
@@ -362,6 +363,13 @@ impl Error for char::ParseCharError {
     }
 }
 
+#[unstable(feature = "try_from", issue = "33417")]
+impl Error for convert::Infallible {
+    fn description(&self) -> &str {
+        match *self {
+        }
+    }
+}
 
 // copied from any.rs
 impl Error + 'static {
diff --git a/src/libstd/net/tcp.rs b/src/libstd/net/tcp.rs
index aff9af66444c4..8d1e7882e5db4 100644
--- a/src/libstd/net/tcp.rs
+++ b/src/libstd/net/tcp.rs
@@ -167,7 +167,7 @@ impl TcpStream {
     /// connection request.
     ///
     /// [`SocketAddr`]: ../../std/net/enum.SocketAddr.html
-    #[stable(feature = "tcpstream_connect_timeout", since = "1.22.0")]
+    #[stable(feature = "tcpstream_connect_timeout", since = "1.21.0")]
     pub fn connect_timeout(addr: &SocketAddr, timeout: Duration) -> io::Result<TcpStream> {
         net_imp::TcpStream::connect_timeout(addr, timeout).map(TcpStream)
     }
diff --git a/src/libstd/sys_common/poison.rs b/src/libstd/sys_common/poison.rs
index 3c61593acc55b..934ac3edbf1f1 100644
--- a/src/libstd/sys_common/poison.rs
+++ b/src/libstd/sys_common/poison.rs
@@ -65,6 +65,31 @@ pub struct Guard {
 /// each lock, but once a lock is poisoned then all future acquisitions will
 /// return this error.
 ///
+/// # Examples
+///
+/// ```
+/// use std::sync::{Arc, Mutex};
+/// use std::thread;
+///
+/// let mutex = Arc::new(Mutex::new(1));
+///
+/// // poison the mutex
+/// let c_mutex = mutex.clone();
+/// let _ = thread::spawn(move || {
+///     let mut data = c_mutex.lock().unwrap();
+///     *data = 2;
+///     panic!();
+/// }).join();
+///
+/// match mutex.lock() {
+///     Ok(_) => unreachable!(),
+///     Err(p_err) => {
+///         let data = p_err.get_ref();
+///         println!("recovered: {}", data);
+///     }
+/// };
+/// ```
+///
 /// [`Mutex`]: ../../std/sync/struct.Mutex.html
 /// [`RwLock`]: ../../std/sync/struct.RwLock.html
 #[stable(feature = "rust1", since = "1.0.0")]
@@ -72,10 +97,16 @@ pub struct PoisonError<T> {
     guard: T,
 }
 
-/// An enumeration of possible errors which can occur while calling the
-/// [`try_lock`] method.
+/// An enumeration of possible errors associated with a [`TryLockResult`] which
+/// can occur while trying to aquire a lock, from the [`try_lock`] method on a
+/// [`Mutex`] or the [`try_read`] and [`try_write`] methods on an [`RwLock`].
 ///
+/// [`Mutex`]: struct.Mutex.html
+/// [`RwLock`]: struct.RwLock.html
+/// [`TryLockResult`]: type.TryLockResult.html
 /// [`try_lock`]: struct.Mutex.html#method.try_lock
+/// [`try_read`]: struct.RwLock.html#method.try_read
+/// [`try_write`]: struct.RwLock.html#method.try_write
 #[stable(feature = "rust1", since = "1.0.0")]
 pub enum TryLockError<T> {
     /// The lock could not be acquired because another thread failed while holding
@@ -148,6 +179,28 @@ impl<T> PoisonError<T> {
 
     /// Consumes this error indicating that a lock is poisoned, returning the
     /// underlying guard to allow access regardless.
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// use std::collections::HashSet;
+    /// use std::sync::{Arc, Mutex};
+    /// use std::thread;
+    ///
+    /// let mutex = Arc::new(Mutex::new(HashSet::new()));
+    ///
+    /// // poison the mutex
+    /// let c_mutex = mutex.clone();
+    /// let _ = thread::spawn(move || {
+    ///     let mut data = c_mutex.lock().unwrap();
+    ///     data.insert(10);
+    ///     panic!();
+    /// }).join();
+    ///
+    /// let p_err = mutex.lock().unwrap_err();
+    /// let data = p_err.into_inner();
+    /// println!("recovered {} items", data.len());
+    /// ```
     #[stable(feature = "sync_poison", since = "1.2.0")]
     pub fn into_inner(self) -> T { self.guard }
 
diff --git a/src/libsyntax/ast.rs b/src/libsyntax/ast.rs
index 496be8b3eb23e..0504e889ea10b 100644
--- a/src/libsyntax/ast.rs
+++ b/src/libsyntax/ast.rs
@@ -538,10 +538,16 @@ pub enum BindingMode {
 
 #[derive(Clone, PartialEq, Eq, RustcEncodable, RustcDecodable, Hash, Debug)]
 pub enum RangeEnd {
-    Included,
+    Included(RangeSyntax),
     Excluded,
 }
 
+#[derive(Clone, PartialEq, Eq, RustcEncodable, RustcDecodable, Hash, Debug)]
+pub enum RangeSyntax {
+    DotDotDot,
+    DotDotEq,
+}
+
 #[derive(Clone, PartialEq, Eq, RustcEncodable, RustcDecodable, Hash, Debug)]
 pub enum PatKind {
     /// Represents a wildcard pattern (`_`)
@@ -578,7 +584,7 @@ pub enum PatKind {
     Ref(P<Pat>, Mutability),
     /// A literal
     Lit(P<Expr>),
-    /// A range pattern, e.g. `1...2` or `1..2`
+    /// A range pattern, e.g. `1...2`, `1..=2` or `1..2`
     Range(P<Expr>, P<Expr>, RangeEnd),
     /// `[a, b, ..i, y, z]` is represented as:
     ///     `PatKind::Slice(box [a, b], Some(i), box [y, z])`
diff --git a/src/libsyntax/diagnostic_list.rs b/src/libsyntax/diagnostic_list.rs
index b29883670bdea..c3cf474783505 100644
--- a/src/libsyntax/diagnostic_list.rs
+++ b/src/libsyntax/diagnostic_list.rs
@@ -291,7 +291,7 @@ Erroneous code example:
 
 fn main() {
     let tmp = vec![0, 1, 2, 3, 4, 4, 3, 3, 2, 1];
-    let x = &tmp[1...]; // error: inclusive range was used with no end
+    let x = &tmp[1..=]; // error: inclusive range was used with no end
 }
 ```
 
@@ -312,7 +312,7 @@ Or put an end to your inclusive range:
 
 fn main() {
     let tmp = vec![0, 1, 2, 3, 4, 4, 3, 3, 2, 1];
-    let x = &tmp[1...3]; // ok!
+    let x = &tmp[1..=3]; // ok!
 }
 ```
 "##,
diff --git a/src/libsyntax/ext/expand.rs b/src/libsyntax/ext/expand.rs
index 68ddfdc404a8b..6e7a8203b61ca 100644
--- a/src/libsyntax/ext/expand.rs
+++ b/src/libsyntax/ext/expand.rs
@@ -308,7 +308,7 @@ impl<'a, 'b> MacroExpander<'a, 'b> {
                         err.emit();
                     }
 
-                    let item = item
+                    let item = self.fully_configure(item)
                         .map_attrs(|mut attrs| { attrs.retain(|a| a.path != "derive"); attrs });
                     let item_with_markers =
                         add_derived_markers(&mut self.cx, item.span(), &traits, item.clone());
@@ -400,6 +400,27 @@ impl<'a, 'b> MacroExpander<'a, 'b> {
         result
     }
 
+    fn fully_configure(&mut self, item: Annotatable) -> Annotatable {
+        let mut cfg = StripUnconfigured {
+            should_test: self.cx.ecfg.should_test,
+            sess: self.cx.parse_sess,
+            features: self.cx.ecfg.features,
+        };
+        // Since the item itself has already been configured by the InvocationCollector,
+        // we know that fold result vector will contain exactly one element
+        match item {
+            Annotatable::Item(item) => {
+                Annotatable::Item(cfg.fold_item(item).pop().unwrap())
+            }
+            Annotatable::TraitItem(item) => {
+                Annotatable::TraitItem(item.map(|item| cfg.fold_trait_item(item).pop().unwrap()))
+            }
+            Annotatable::ImplItem(item) => {
+                Annotatable::ImplItem(item.map(|item| cfg.fold_impl_item(item).pop().unwrap()))
+            }
+        }
+    }
+
     fn expand_invoc(&mut self, invoc: Invocation, ext: Rc<SyntaxExtension>) -> Expansion {
         let result = match invoc.kind {
             InvocationKind::Bang { .. } => self.expand_bang_invoc(invoc, ext),
@@ -740,15 +761,6 @@ struct InvocationCollector<'a, 'b: 'a> {
     monotonic: bool,
 }
 
-macro_rules! fully_configure {
-    ($this:ident, $node:ident, $noop_fold:ident) => {
-        match $noop_fold($node, &mut $this.cfg).pop() {
-            Some(node) => node,
-            None => return SmallVector::new(),
-        }
-    }
-}
-
 impl<'a, 'b> InvocationCollector<'a, 'b> {
     fn collect(&mut self, expansion_kind: ExpansionKind, kind: InvocationKind) -> Expansion {
         let mark = Mark::fresh(self.cx.current_expansion.mark);
@@ -900,7 +912,7 @@ impl<'a, 'b> Folder for InvocationCollector<'a, 'b> {
 
         let (attr, traits, mut item) = self.classify_item(item);
         if attr.is_some() || !traits.is_empty() {
-            let item = Annotatable::Item(fully_configure!(self, item, noop_fold_item));
+            let item = Annotatable::Item(item);
             return self.collect_attr(attr, traits, item, ExpansionKind::Items).make_items();
         }
 
@@ -974,8 +986,7 @@ impl<'a, 'b> Folder for InvocationCollector<'a, 'b> {
 
         let (attr, traits, item) = self.classify_item(item);
         if attr.is_some() || !traits.is_empty() {
-            let item =
-                Annotatable::TraitItem(P(fully_configure!(self, item, noop_fold_trait_item)));
+            let item = Annotatable::TraitItem(P(item));
             return self.collect_attr(attr, traits, item, ExpansionKind::TraitItems)
                 .make_trait_items()
         }
@@ -995,7 +1006,7 @@ impl<'a, 'b> Folder for InvocationCollector<'a, 'b> {
 
         let (attr, traits, item) = self.classify_item(item);
         if attr.is_some() || !traits.is_empty() {
-            let item = Annotatable::ImplItem(P(fully_configure!(self, item, noop_fold_impl_item)));
+            let item = Annotatable::ImplItem(P(item));
             return self.collect_attr(attr, traits, item, ExpansionKind::ImplItems)
                 .make_impl_items();
         }
diff --git a/src/libsyntax/ext/quote.rs b/src/libsyntax/ext/quote.rs
index c3f3a59c30212..bd8c9a0ed40b2 100644
--- a/src/libsyntax/ext/quote.rs
+++ b/src/libsyntax/ext/quote.rs
@@ -686,7 +686,9 @@ fn expr_mk_token(cx: &ExtCtxt, sp: Span, tok: &token::Token) -> P<ast::Expr> {
         token::At           => "At",
         token::Dot          => "Dot",
         token::DotDot       => "DotDot",
+        token::DotEq        => "DotEq",
         token::DotDotDot    => "DotDotDot",
+        token::DotDotEq     => "DotDotEq",
         token::Comma        => "Comma",
         token::Semi         => "Semi",
         token::Colon        => "Colon",
diff --git a/src/libsyntax/feature_gate.rs b/src/libsyntax/feature_gate.rs
index 5c730aaa8d0fa..e92a7484f3367 100644
--- a/src/libsyntax/feature_gate.rs
+++ b/src/libsyntax/feature_gate.rs
@@ -26,7 +26,7 @@ use self::AttributeType::*;
 use self::AttributeGate::*;
 
 use abi::Abi;
-use ast::{self, NodeId, PatKind, RangeEnd};
+use ast::{self, NodeId, PatKind, RangeEnd, RangeSyntax};
 use attr;
 use codemap::Spanned;
 use syntax_pos::Span;
@@ -261,7 +261,7 @@ declare_features! (
     // rustc internal
     (active, abi_vectorcall, "1.7.0", None),
 
-    // a...b and ...b
+    // a..=b and ..=b
     (active, inclusive_range_syntax, "1.7.0", Some(28237)),
 
     // X..Y patterns
@@ -392,6 +392,9 @@ declare_features! (
 
     // allow `'_` placeholder lifetimes
     (active, underscore_lifetimes, "1.22.0", Some(44524)),
+
+    // allow `..=` in patterns (RFC 1192)
+    (active, dotdoteq_in_patterns, "1.22.0", Some(28237)),
 );
 
 declare_features! (
@@ -724,6 +727,12 @@ pub const BUILTIN_ATTRIBUTES: &'static [(&'static str, AttributeType, AttributeG
                                                        is just used for rustc unit tests \
                                                        and will never be stable",
                                                       cfg_fn!(rustc_attrs))),
+    ("rustc_synthetic", Whitelisted, Gated(Stability::Unstable,
+                                                      "rustc_attrs",
+                                                      "this attribute \
+                                                       is just used for rustc unit tests \
+                                                       and will never be stable",
+                                                      cfg_fn!(rustc_attrs))),
     ("rustc_symbol_name", Whitelisted, Gated(Stability::Unstable,
                                              "rustc_attrs",
                                              "internal rustc attributes will never be stable",
@@ -1491,6 +1500,10 @@ impl<'a> Visitor<'a> for PostExpansionVisitor<'a> {
                 gate_feature_post!(&self, exclusive_range_pattern, pattern.span,
                                    "exclusive range pattern syntax is experimental");
             }
+            PatKind::Range(_, _, RangeEnd::Included(RangeSyntax::DotDotEq)) => {
+                gate_feature_post!(&self, dotdoteq_in_patterns, pattern.span,
+                                   "`..=` syntax in patterns is experimental");
+            }
             _ => {}
         }
         visit::walk_pat(self, pattern)
diff --git a/src/libsyntax/parse/lexer/mod.rs b/src/libsyntax/parse/lexer/mod.rs
index ce3f16d2ba1b9..1cb7b0eca58d0 100644
--- a/src/libsyntax/parse/lexer/mod.rs
+++ b/src/libsyntax/parse/lexer/mod.rs
@@ -1131,6 +1131,9 @@ impl<'a> StringReader<'a> {
                     if self.ch_is('.') {
                         self.bump();
                         Ok(token::DotDotDot)
+                    } else if self.ch_is('=') {
+                        self.bump();
+                        Ok(token::DotDotEq)
                     } else {
                         Ok(token::DotDot)
                     }
diff --git a/src/libsyntax/parse/parser.rs b/src/libsyntax/parse/parser.rs
index 3829be40a1e3f..d5ba4b54d9014 100644
--- a/src/libsyntax/parse/parser.rs
+++ b/src/libsyntax/parse/parser.rs
@@ -38,7 +38,7 @@ use ast::{Ty, TyKind, TypeBinding, TyParam, TyParamBounds};
 use ast::{ViewPath, ViewPathGlob, ViewPathList, ViewPathSimple};
 use ast::{Visibility, WhereClause};
 use ast::{BinOpKind, UnOp};
-use ast::RangeEnd;
+use ast::{RangeEnd, RangeSyntax};
 use {ast, attr};
 use codemap::{self, CodeMap, Spanned, respan};
 use syntax_pos::{self, Span, BytePos};
@@ -432,7 +432,7 @@ impl Error {
             Error::InclusiveRangeWithNoEnd => {
                 let mut err = struct_span_err!(handler, sp, E0586,
                                                "inclusive range with no end");
-                err.help("inclusive ranges must be bounded at the end (`...b` or `a...b`)");
+                err.help("inclusive ranges must be bounded at the end (`..=b` or `a..=b`)");
                 err
             }
         }
@@ -2710,7 +2710,7 @@ impl<'a> Parser<'a> {
                 LhsExpr::AttributesParsed(attrs) => Some(attrs),
                 _ => None,
             };
-            if self.token == token::DotDot || self.token == token::DotDotDot {
+            if [token::DotDot, token::DotDotDot, token::DotDotEq].contains(&self.token) {
                 return self.parse_prefix_range_expr(attrs);
             } else {
                 self.parse_prefix_expr(attrs)?
@@ -2744,6 +2744,10 @@ impl<'a> Parser<'a> {
             if op.precedence() < min_prec {
                 break;
             }
+            // Warn about deprecated ... syntax (until SNAP)
+            if self.token == token::DotDotDot {
+                self.warn_dotdoteq(self.span);
+            }
             self.bump();
             if op.is_comparison() {
                 self.check_no_chained_comparison(&lhs, &op);
@@ -2770,12 +2774,13 @@ impl<'a> Parser<'a> {
                     }
                 };
                 continue
-            } else if op == AssocOp::DotDot || op == AssocOp::DotDotDot {
-                // If we didn’t have to handle `x..`/`x...`, it would be pretty easy to
+            } else if op == AssocOp::DotDot || op == AssocOp::DotDotEq {
+                // If we didn’t have to handle `x..`/`x..=`, it would be pretty easy to
                 // generalise it to the Fixity::None code.
                 //
-                // We have 2 alternatives here: `x..y`/`x...y` and `x..`/`x...` The other
+                // We have 2 alternatives here: `x..y`/`x..=y` and `x..`/`x..=` The other
                 // two variants are handled with `parse_prefix_range_expr` call above.
+                // (and `x...y`/`x...` until SNAP)
                 let rhs = if self.is_at_start_of_range_notation_rhs() {
                     Some(self.parse_assoc_expr_with(op.precedence() + 1,
                                                     LhsExpr::NotYetParsed)?)
@@ -2852,8 +2857,8 @@ impl<'a> Parser<'a> {
                     let aopexpr = self.mk_assign_op(codemap::respan(cur_op_span, aop), lhs, rhs);
                     self.mk_expr(span, aopexpr, ThinVec::new())
                 }
-                AssocOp::As | AssocOp::Colon | AssocOp::DotDot | AssocOp::DotDotDot => {
-                    self.bug("As, Colon, DotDot or DotDotDot branch reached")
+                AssocOp::As | AssocOp::Colon | AssocOp::DotDot | AssocOp::DotDotEq => {
+                    self.bug("AssocOp should have been handled by special case")
                 }
             };
 
@@ -2949,17 +2954,22 @@ impl<'a> Parser<'a> {
         }
     }
 
-    /// Parse prefix-forms of range notation: `..expr`, `..`, `...expr`
+    /// Parse prefix-forms of range notation: `..expr`, `..`, `..=expr` (and `...expr` until SNAP)
     fn parse_prefix_range_expr(&mut self,
                                already_parsed_attrs: Option<ThinVec<Attribute>>)
                                -> PResult<'a, P<Expr>> {
-        debug_assert!(self.token == token::DotDot || self.token == token::DotDotDot,
-                      "parse_prefix_range_expr: token {:?} is not DotDot or DotDotDot",
+        // SNAP remove DotDotDot
+        debug_assert!([token::DotDot, token::DotDotDot, token::DotDotEq].contains(&self.token),
+                      "parse_prefix_range_expr: token {:?} is not DotDot/DotDotDot/DotDotEq",
                       self.token);
         let tok = self.token.clone();
         let attrs = self.parse_or_use_outer_attributes(already_parsed_attrs)?;
         let lo = self.span;
         let mut hi = self.span;
+        // Warn about deprecated ... syntax (until SNAP)
+        if tok == token::DotDotDot {
+            self.warn_dotdoteq(self.span);
+        }
         self.bump();
         let opt_end = if self.is_at_start_of_range_notation_rhs() {
             // RHS must be parsed with more associativity than the dots.
@@ -3450,7 +3460,7 @@ impl<'a> Parser<'a> {
     fn parse_as_ident(&mut self) -> bool {
         self.look_ahead(1, |t| match *t {
             token::OpenDelim(token::Paren) | token::OpenDelim(token::Brace) |
-            token::DotDotDot | token::ModSep | token::Not => Some(false),
+            token::DotDotDot | token::DotDotEq | token::ModSep | token::Not => Some(false),
             // ensure slice patterns [a, b.., c] and [a, b, c..] don't go into the
             // range pattern branch
             token::DotDot => None,
@@ -3544,11 +3554,13 @@ impl<'a> Parser<'a> {
                         let mac = respan(lo.to(self.prev_span), Mac_ { path: path, tts: tts });
                         pat = PatKind::Mac(mac);
                     }
-                    token::DotDotDot | token::DotDot => {
+                    token::DotDotDot | token::DotDotEq | token::DotDot => {
                         let end_kind = match self.token {
                             token::DotDot => RangeEnd::Excluded,
-                            token::DotDotDot => RangeEnd::Included,
-                            _ => panic!("can only parse `..` or `...` for ranges (checked above)"),
+                            token::DotDotDot => RangeEnd::Included(RangeSyntax::DotDotDot),
+                            token::DotDotEq => RangeEnd::Included(RangeSyntax::DotDotEq),
+                            _ => panic!("can only parse `..`/`...`/`..=` for ranges \
+                                         (checked above)"),
                         };
                         // Parse range
                         let span = lo.to(self.prev_span);
@@ -3589,7 +3601,12 @@ impl<'a> Parser<'a> {
                     Ok(begin) => {
                         if self.eat(&token::DotDotDot) {
                             let end = self.parse_pat_range_end()?;
-                            pat = PatKind::Range(begin, end, RangeEnd::Included);
+                            pat = PatKind::Range(begin, end,
+                                    RangeEnd::Included(RangeSyntax::DotDotDot));
+                        } else if self.eat(&token::DotDotEq) {
+                            let end = self.parse_pat_range_end()?;
+                            pat = PatKind::Range(begin, end,
+                                    RangeEnd::Included(RangeSyntax::DotDotEq));
                         } else if self.eat(&token::DotDot) {
                             let end = self.parse_pat_range_end()?;
                             pat = PatKind::Range(begin, end, RangeEnd::Excluded);
@@ -3973,7 +3990,7 @@ impl<'a> Parser<'a> {
                     token::BinOp(token::Minus) | token::BinOp(token::Star) |
                     token::BinOp(token::And) | token::BinOp(token::Or) |
                     token::AndAnd | token::OrOr |
-                    token::DotDot | token::DotDotDot => false,
+                    token::DotDot | token::DotDotDot | token::DotDotEq => false,
                     _ => true,
                 } {
                     self.warn_missing_semicolon();
@@ -4195,6 +4212,12 @@ impl<'a> Parser<'a> {
         }).emit();
     }
 
+    fn warn_dotdoteq(&self, span: Span) {
+        self.diagnostic().struct_span_warn(span, {
+            "`...` is being replaced by `..=`"
+        }).emit();
+    }
+
     // Parse bounds of a type parameter `BOUND + BOUND + BOUND`, possibly with trailing `+`.
     // BOUND = TY_BOUND | LT_BOUND
     // LT_BOUND = LIFETIME (e.g. `'a`)
diff --git a/src/libsyntax/parse/token.rs b/src/libsyntax/parse/token.rs
index a316733bdb51c..4888654fac9d0 100644
--- a/src/libsyntax/parse/token.rs
+++ b/src/libsyntax/parse/token.rs
@@ -152,6 +152,8 @@ pub enum Token {
     Dot,
     DotDot,
     DotDotDot,
+    DotDotEq,
+    DotEq, // HACK(durka42) never produced by the parser, only used for libproc_macro
     Comma,
     Semi,
     Colon,
@@ -212,18 +214,19 @@ impl Token {
     pub fn can_begin_expr(&self) -> bool {
         match *self {
             Ident(ident)                => ident_can_begin_expr(ident), // value name or keyword
-            OpenDelim(..)               | // tuple, array or block
-            Literal(..)                 | // literal
-            Not                         | // operator not
-            BinOp(Minus)                | // unary minus
-            BinOp(Star)                 | // dereference
-            BinOp(Or) | OrOr            | // closure
-            BinOp(And)                  | // reference
-            AndAnd                      | // double reference
-            DotDot | DotDotDot          | // range notation
-            Lt | BinOp(Shl)             | // associated path
-            ModSep                      | // global path
-            Pound                       => true, // expression attributes
+            OpenDelim(..)                     | // tuple, array or block
+            Literal(..)                       | // literal
+            Not                               | // operator not
+            BinOp(Minus)                      | // unary minus
+            BinOp(Star)                       | // dereference
+            BinOp(Or) | OrOr                  | // closure
+            BinOp(And)                        | // reference
+            AndAnd                            | // double reference
+            DotDot | DotDotDot | DotDotEq     | // range notation
+                // SNAP remove DotDotDot
+            Lt | BinOp(Shl)                   | // associated path
+            ModSep                            | // global path
+            Pound                             => true, // expression attributes
             Interpolated(ref nt) => match nt.0 {
                 NtIdent(..) | NtExpr(..) | NtBlock(..) | NtPath(..) => true,
                 _ => false,
@@ -402,10 +405,12 @@ impl Token {
             Dot => match joint {
                 Dot => DotDot,
                 DotDot => DotDotDot,
+                DotEq => DotDotEq,
                 _ => return None,
             },
             DotDot => match joint {
                 Dot => DotDotDot,
+                Eq => DotDotEq,
                 _ => return None,
             },
             Colon => match joint {
@@ -413,9 +418,9 @@ impl Token {
                 _ => return None,
             },
 
-            Le | EqEq | Ne | Ge | AndAnd | OrOr | Tilde | BinOpEq(..) | At | DotDotDot | Comma |
-            Semi | ModSep | RArrow | LArrow | FatArrow | Pound | Dollar | Question |
-            OpenDelim(..) | CloseDelim(..) | Underscore => return None,
+            Le | EqEq | Ne | Ge | AndAnd | OrOr | Tilde | BinOpEq(..) | At | DotDotDot | DotEq |
+            DotDotEq | Comma | Semi | ModSep | RArrow | LArrow | FatArrow | Pound | Dollar |
+            Question | OpenDelim(..) | CloseDelim(..) | Underscore => return None,
 
             Literal(..) | Ident(..) | Lifetime(..) | Interpolated(..) | DocComment(..) |
             Whitespace | Comment | Shebang(..) | Eof => return None,
diff --git a/src/libsyntax/print/pprust.rs b/src/libsyntax/print/pprust.rs
index 9903dc50f36fb..959dd4ef30f29 100644
--- a/src/libsyntax/print/pprust.rs
+++ b/src/libsyntax/print/pprust.rs
@@ -11,7 +11,7 @@
 pub use self::AnnNode::*;
 
 use abi::{self, Abi};
-use ast::{self, BlockCheckMode, PatKind, RangeEnd};
+use ast::{self, BlockCheckMode, PatKind, RangeEnd, RangeSyntax};
 use ast::{SelfKind, RegionTyParamBound, TraitTyParamBound, TraitBoundModifier};
 use ast::Attribute;
 use util::parser::{self, AssocOp, Fixity};
@@ -203,6 +203,8 @@ pub fn token_to_string(tok: &Token) -> String {
         token::Dot                  => ".".to_string(),
         token::DotDot               => "..".to_string(),
         token::DotDotDot            => "...".to_string(),
+        token::DotDotEq             => "..=".to_string(),
+        token::DotEq                => ".=".to_string(),
         token::Comma                => ",".to_string(),
         token::Semi                 => ";".to_string(),
         token::Colon                => ":".to_string(),
@@ -2588,7 +2590,8 @@ impl<'a> State<'a> {
                 self.print_expr(begin)?;
                 self.s.space()?;
                 match *end_kind {
-                    RangeEnd::Included => self.s.word("...")?,
+                    RangeEnd::Included(RangeSyntax::DotDotDot) => self.s.word("...")?,
+                    RangeEnd::Included(RangeSyntax::DotDotEq) => self.s.word("..=")?,
                     RangeEnd::Excluded => self.s.word("..")?,
                 }
                 self.print_expr(end)?;
diff --git a/src/libsyntax/util/parser.rs b/src/libsyntax/util/parser.rs
index a4f06cb1b45da..590874806d7b5 100644
--- a/src/libsyntax/util/parser.rs
+++ b/src/libsyntax/util/parser.rs
@@ -62,8 +62,8 @@ pub enum AssocOp {
     As,
     /// `..` range
     DotDot,
-    /// `...` range
-    DotDotDot,
+    /// `..=` range
+    DotDotEq,
     /// `:`
     Colon,
 }
@@ -105,7 +105,8 @@ impl AssocOp {
             Token::AndAnd => Some(LAnd),
             Token::OrOr => Some(LOr),
             Token::DotDot => Some(DotDot),
-            Token::DotDotDot => Some(DotDotDot),
+            Token::DotDotEq => Some(DotDotEq),
+            Token::DotDotDot => Some(DotDotEq), // remove this after SNAP
             Token::Colon => Some(Colon),
             _ if t.is_keyword(keywords::As) => Some(As),
             _ => None
@@ -151,7 +152,7 @@ impl AssocOp {
             Less | Greater | LessEqual | GreaterEqual | Equal | NotEqual => 7,
             LAnd => 6,
             LOr => 5,
-            DotDot | DotDotDot => 4,
+            DotDot | DotDotEq => 4,
             Inplace => 3,
             Assign | AssignOp(_) => 2,
         }
@@ -166,7 +167,7 @@ impl AssocOp {
             As | Multiply | Divide | Modulus | Add | Subtract | ShiftLeft | ShiftRight | BitAnd |
             BitXor | BitOr | Less | Greater | LessEqual | GreaterEqual | Equal | NotEqual |
             LAnd | LOr | Colon => Fixity::Left,
-            DotDot | DotDotDot => Fixity::None
+            DotDot | DotDotEq => Fixity::None
         }
     }
 
@@ -176,7 +177,7 @@ impl AssocOp {
             Less | Greater | LessEqual | GreaterEqual | Equal | NotEqual => true,
             Inplace | Assign | AssignOp(_) | As | Multiply | Divide | Modulus | Add | Subtract |
             ShiftLeft | ShiftRight | BitAnd | BitXor | BitOr | LAnd | LOr |
-            DotDot | DotDotDot | Colon => false
+            DotDot | DotDotEq | Colon => false
         }
     }
 
@@ -186,7 +187,7 @@ impl AssocOp {
             Assign | AssignOp(_) | Inplace => true,
             Less | Greater | LessEqual | GreaterEqual | Equal | NotEqual | As | Multiply | Divide |
             Modulus | Add | Subtract | ShiftLeft | ShiftRight | BitAnd | BitXor | BitOr | LAnd |
-            LOr | DotDot | DotDotDot | Colon => false
+            LOr | DotDot | DotDotEq | Colon => false
         }
     }
 
@@ -211,7 +212,7 @@ impl AssocOp {
             BitOr => Some(BinOpKind::BitOr),
             LAnd => Some(BinOpKind::And),
             LOr => Some(BinOpKind::Or),
-            Inplace | Assign | AssignOp(_) | As | DotDot | DotDotDot | Colon => None
+            Inplace | Assign | AssignOp(_) | As | DotDot | DotDotEq | Colon => None
         }
     }
 }
diff --git a/src/rtstartup/rsbegin.rs b/src/rtstartup/rsbegin.rs
index 335817fddbbe2..8733c7436d5bd 100644
--- a/src/rtstartup/rsbegin.rs
+++ b/src/rtstartup/rsbegin.rs
@@ -38,7 +38,7 @@ trait Copy {}
 trait Freeze {}
 impl Freeze for .. {}
 
-#[lang="drop_in_place"]
+#[lang = "drop_in_place"]
 #[inline]
 #[allow(unconditional_recursion)]
 pub unsafe fn drop_in_place<T: ?Sized>(to_drop: *mut T) {
diff --git a/src/rtstartup/rsend.rs b/src/rtstartup/rsend.rs
index 9229b4e31289f..a6aed3540ddbb 100644
--- a/src/rtstartup/rsend.rs
+++ b/src/rtstartup/rsend.rs
@@ -25,7 +25,7 @@ trait Copy {}
 trait Freeze {}
 impl Freeze for .. {}
 
-#[lang="drop_in_place"]
+#[lang = "drop_in_place"]
 #[inline]
 #[allow(unconditional_recursion)]
 pub unsafe fn drop_in_place<T: ?Sized>(to_drop: *mut T) {
diff --git a/src/test/compile-fail/E0506.rs b/src/test/compile-fail/E0506.rs
index ddaffd4a2736d..b2cf66849c759 100644
--- a/src/test/compile-fail/E0506.rs
+++ b/src/test/compile-fail/E0506.rs
@@ -8,6 +8,9 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
+// revisions: ast mir
+//[mir]compile-flags: -Z emit-end-regions -Z borrowck-mir
+
 struct FancyNum {
     num: u8,
 }
@@ -15,7 +18,9 @@ struct FancyNum {
 fn main() {
     let mut fancy_num = FancyNum { num: 5 };
     let fancy_ref = &fancy_num;
-    fancy_num = FancyNum { num: 6 }; //~ ERROR E0506
+    fancy_num = FancyNum { num: 6 }; //[ast]~ ERROR E0506
+                                     //[mir]~^ ERROR (Mir) [E0506]
+                                     //[mir]~| ERROR (Ast) [E0506]
 
     println!("Num: {}, Ref: {}", fancy_num.num, fancy_ref.num);
 }
diff --git a/src/test/compile-fail/E0586.rs b/src/test/compile-fail/E0586.rs
index 0b063569abc17..c1bfc5c73a1b3 100644
--- a/src/test/compile-fail/E0586.rs
+++ b/src/test/compile-fail/E0586.rs
@@ -10,5 +10,5 @@
 
 fn main() {
     let tmp = vec![0, 1, 2, 3, 4, 4, 3, 3, 2, 1];
-    let x = &tmp[1...]; //~ ERROR E0586
+    let x = &tmp[1..=]; //~ ERROR E0586
 }
diff --git a/src/test/compile-fail/borrowck/borrowck-assign-comp.rs b/src/test/compile-fail/borrowck/borrowck-assign-comp.rs
index 802b83119b7c3..e63de3a3bed79 100644
--- a/src/test/compile-fail/borrowck/borrowck-assign-comp.rs
+++ b/src/test/compile-fail/borrowck/borrowck-assign-comp.rs
@@ -8,6 +8,9 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
+// revisions: ast mir
+//[mir]compile-flags: -Z emit-end-regions -Z borrowck-mir
+
 struct point { x: isize, y: isize }
 
 fn a() {
@@ -17,7 +20,9 @@ fn a() {
     // This assignment is illegal because the field x is not
     // inherently mutable; since `p` was made immutable, `p.x` is now
     // immutable.  Otherwise the type of &_q.x (&isize) would be wrong.
-    p.x = 5; //~ ERROR cannot assign to `p.x`
+    p.x = 5; //[ast]~ ERROR cannot assign to `p.x`
+             //[mir]~^ ERROR cannot assign to `p.x` because it is borrowed (Ast)
+             //[mir]~| ERROR cannot assign to `p.0` because it is borrowed (Mir)
     q.x;
 }
 
@@ -27,7 +32,9 @@ fn c() {
 
     let mut p = point {x: 3, y: 4};
     let q = &p.y;
-    p = point {x: 5, y: 7};//~ ERROR cannot assign to `p`
+    p = point {x: 5, y: 7};//[ast]~ ERROR cannot assign to `p`
+                           //[mir]~^ ERROR cannot assign to `p` because it is borrowed (Ast)
+                           //[mir]~| ERROR cannot assign to `p` because it is borrowed (Mir)
     p.x; // silence warning
     *q; // stretch loan
 }
@@ -38,7 +45,9 @@ fn d() {
 
     let mut p = point {x: 3, y: 4};
     let q = &p.y;
-    p.y = 5; //~ ERROR cannot assign to `p.y`
+    p.y = 5; //[ast]~ ERROR cannot assign to `p.y`
+             //[mir]~^ ERROR cannot assign to `p.y` because it is borrowed (Ast)
+             //[mir]~| ERROR cannot assign to `p.1` because it is borrowed (Mir)
     *q;
 }
 
diff --git a/src/test/compile-fail/borrowck/borrowck-closures-mut-and-imm.rs b/src/test/compile-fail/borrowck/borrowck-closures-mut-and-imm.rs
index aaa0766121543..6c003ec2d48b3 100644
--- a/src/test/compile-fail/borrowck/borrowck-closures-mut-and-imm.rs
+++ b/src/test/compile-fail/borrowck/borrowck-closures-mut-and-imm.rs
@@ -11,6 +11,10 @@
 // Tests that two closures cannot simultaneously have mutable
 // and immutable access to the variable. Issue #6801.
 
+// ignore-tidy-linelength
+// revisions: ast mir
+//[mir]compile-flags: -Z emit-end-regions -Z borrowck-mir
+
 #![feature(box_syntax)]
 
 fn get(x: &isize) -> isize {
@@ -24,37 +28,49 @@ fn set(x: &mut isize) {
 fn a() {
     let mut x = 3;
     let c1 = || x = 4;
-    let c2 = || x * 5; //~ ERROR cannot borrow `x`
+    let c2 = || x * 5; //[ast]~ ERROR cannot borrow `x`
+                       //[mir]~^ ERROR cannot borrow `x` as immutable because it is also borrowed as mutable (Ast)
+                       //[mir]~| ERROR cannot borrow `x` as immutable because it is also borrowed as mutable (Mir)
 }
 
 fn b() {
     let mut x = 3;
     let c1 = || set(&mut x);
-    let c2 = || get(&x); //~ ERROR cannot borrow `x`
+    let c2 = || get(&x); //[ast]~ ERROR cannot borrow `x`
+                         //[mir]~^ ERROR cannot borrow `x` as immutable because it is also borrowed as mutable (Ast)
+                         //[mir]~| ERROR cannot borrow `x` as immutable because it is also borrowed as mutable (Mir)
 }
 
 fn c() {
     let mut x = 3;
     let c1 = || set(&mut x);
-    let c2 = || x * 5; //~ ERROR cannot borrow `x`
+    let c2 = || x * 5; //[ast]~ ERROR cannot borrow `x`
+                       //[mir]~^ ERROR cannot borrow `x` as immutable because it is also borrowed as mutable (Ast)
+                       //[mir]~| ERROR cannot borrow `x` as immutable because it is also borrowed as mutable (Mir)
 }
 
 fn d() {
     let mut x = 3;
     let c2 = || x * 5;
-    x = 5; //~ ERROR cannot assign
+    x = 5; //[ast]~ ERROR cannot assign
+           //[mir]~^ ERROR cannot assign to `x` because it is borrowed (Ast)
+           //[mir]~| ERROR cannot assign to `x` because it is borrowed (Mir)
 }
 
 fn e() {
     let mut x = 3;
     let c1 = || get(&x);
-    x = 5; //~ ERROR cannot assign
+    x = 5; //[ast]~ ERROR cannot assign
+           //[mir]~^ ERROR cannot assign to `x` because it is borrowed (Ast)
+           //[mir]~| ERROR cannot assign to `x` because it is borrowed (Mir)
 }
 
 fn f() {
     let mut x: Box<_> = box 3;
     let c1 = || get(&*x);
-    *x = 5; //~ ERROR cannot assign
+    *x = 5; //[ast]~ ERROR cannot assign
+            //[mir]~^ ERROR cannot assign to `*x` because it is borrowed (Ast)
+            //[mir]~| ERROR cannot assign to `(*x)` because it is borrowed (Mir)
 }
 
 fn g() {
@@ -64,7 +80,9 @@ fn g() {
 
     let mut x: Box<_> = box Foo { f: box 3 };
     let c1 = || get(&*x.f);
-    *x.f = 5; //~ ERROR cannot assign to `*x.f`
+    *x.f = 5; //[ast]~ ERROR cannot assign to `*x.f`
+              //[mir]~^ ERROR cannot assign to `*x.f` because it is borrowed (Ast)
+              //[mir]~| ERROR cannot assign to `(*(*x).0)` because it is borrowed (Mir)
 }
 
 fn h() {
@@ -74,7 +92,9 @@ fn h() {
 
     let mut x: Box<_> = box Foo { f: box 3 };
     let c1 = || get(&*x.f);
-    let c2 = || *x.f = 5; //~ ERROR cannot borrow `x` as mutable
+    let c2 = || *x.f = 5; //[ast]~ ERROR cannot borrow `x` as mutable
+                          //[mir]~^ ERROR cannot borrow `x` as mutable because it is also borrowed as immutable (Ast)
+                          //[mir]~| ERROR cannot borrow `x` as mutable because it is also borrowed as immutable (Mir)
 }
 
 fn main() {
diff --git a/src/test/compile-fail/borrowck/borrowck-imm-ref-to-mut-rec-field-issue-3162-c.rs b/src/test/compile-fail/borrowck/borrowck-imm-ref-to-mut-rec-field-issue-3162-c.rs
index 8af10231921aa..03b6b1d732400 100644
--- a/src/test/compile-fail/borrowck/borrowck-imm-ref-to-mut-rec-field-issue-3162-c.rs
+++ b/src/test/compile-fail/borrowck/borrowck-imm-ref-to-mut-rec-field-issue-3162-c.rs
@@ -8,11 +8,16 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
+// revisions: ast mir
+//[mir]compile-flags: -Z emit-end-regions -Z borrowck-mir
+
 fn main() {
     let mut _a = 3;
     let _b = &mut _a;
     {
         let _c = &*_b;
-        _a = 4; //~ ERROR cannot assign to `_a`
+        _a = 4; //[ast]~ ERROR cannot assign to `_a`
+                //[mir]~^ ERROR cannot assign to `_a` because it is borrowed (Ast)
+                //[mir]~| ERROR cannot assign to `_a` because it is borrowed (Mir)
     }
 }
diff --git a/src/test/compile-fail/borrowck/borrowck-lend-flow-match.rs b/src/test/compile-fail/borrowck/borrowck-lend-flow-match.rs
index f24e82d11c5ed..0e8c003e408f6 100644
--- a/src/test/compile-fail/borrowck/borrowck-lend-flow-match.rs
+++ b/src/test/compile-fail/borrowck/borrowck-lend-flow-match.rs
@@ -8,6 +8,9 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
+// revisions: ast mir
+//[mir]compile-flags: -Z emit-end-regions -Z borrowck-mir
+
 #![allow(unused_variables)]
 #![allow(unused_assignments)]
 
@@ -22,7 +25,9 @@ fn separate_arms() {
             x = Some(0);
         }
         Some(ref __isize) => {
-            x = Some(1); //~ ERROR cannot assign
+            x = Some(1); //[ast]~ ERROR cannot assign
+                         //[mir]~^ ERROR cannot assign to `x` because it is borrowed (Ast)
+                         //[mir]~| ERROR cannot assign to `x` because it is borrowed (Mir)
         }
     }
     x.clone(); // just to prevent liveness warnings
diff --git a/src/test/compile-fail/borrowck/borrowck-match-binding-is-assignment.rs b/src/test/compile-fail/borrowck/borrowck-match-binding-is-assignment.rs
index c219b7c5424e9..3639db5cfc4cd 100644
--- a/src/test/compile-fail/borrowck/borrowck-match-binding-is-assignment.rs
+++ b/src/test/compile-fail/borrowck/borrowck-match-binding-is-assignment.rs
@@ -8,6 +8,9 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
+// revisions: ast mir
+//[mir]compile-flags: -Zemit-end-regions -Zborrowck-mir
+
 // Test that immutable pattern bindings cannot be reassigned.
 
 #![feature(slice_patterns)]
@@ -23,31 +26,41 @@ struct S {
 pub fn main() {
     match 1 {
         x => {
-            x += 1; //~ ERROR re-assignment of immutable variable `x`
+            x += 1; //[ast]~ ERROR re-assignment of immutable variable `x`
+                    //[mir]~^ ERROR (Mir) [E0384]
+                    //[mir]~| ERROR (Ast) [E0384]
         }
     }
 
     match E::Foo(1) {
         E::Foo(x) => {
-            x += 1; //~ ERROR re-assignment of immutable variable `x`
+            x += 1; //[ast]~ ERROR re-assignment of immutable variable `x`
+                    //[mir]~^ ERROR (Mir) [E0384]
+                    //[mir]~| ERROR (Ast) [E0384]
         }
     }
 
     match (S { bar: 1 }) {
         S { bar: x } => {
-            x += 1; //~ ERROR re-assignment of immutable variable `x`
+            x += 1; //[ast]~ ERROR re-assignment of immutable variable `x`
+                    //[mir]~^ ERROR (Mir) [E0384]
+                    //[mir]~| ERROR (Ast) [E0384]
         }
     }
 
     match (1,) {
         (x,) => {
-            x += 1; //~ ERROR re-assignment of immutable variable `x`
+            x += 1; //[ast]~ ERROR re-assignment of immutable variable `x`
+                    //[mir]~^ ERROR (Mir) [E0384]
+                    //[mir]~| ERROR (Ast) [E0384]
         }
     }
 
     match [1,2,3] {
         [x,_,_] => {
-            x += 1; //~ ERROR re-assignment of immutable variable `x`
+            x += 1; //[ast]~ ERROR re-assignment of immutable variable `x`
+                    //[mir]~^ ERROR (Mir) [E0384]
+                    //[mir]~| ERROR (Ast) [E0384]
         }
     }
 }
diff --git a/src/test/compile-fail/borrowck/borrowck-overloaded-index-and-overloaded-deref.rs b/src/test/compile-fail/borrowck/borrowck-overloaded-index-and-overloaded-deref.rs
index bee56c9bf390b..9b20cd470f62b 100644
--- a/src/test/compile-fail/borrowck/borrowck-overloaded-index-and-overloaded-deref.rs
+++ b/src/test/compile-fail/borrowck/borrowck-overloaded-index-and-overloaded-deref.rs
@@ -13,6 +13,9 @@
 // operator. The accounting of the all the implicit things going on
 // here is rather subtle. Issue #20232.
 
+// revisions: ast mir
+//[mir]compile-flags: -Z emit-end-regions -Z borrowck-mir
+
 use std::ops::{Deref, Index};
 
 struct MyVec<T> { x: T }
@@ -39,7 +42,9 @@ fn main() {
     let mut v = MyVec { x: MyPtr { x: Foo { f: 22 } } };
     let i = &v[0].f;
     v = MyVec { x: MyPtr { x: Foo { f: 23 } } };
-    //~^ ERROR cannot assign to `v`
+    //[ast]~^ ERROR cannot assign to `v`
+    //[mir]~^^ ERROR cannot assign to `v` because it is borrowed (Ast)
+    //[mir]~| ERROR cannot assign to `v` because it is borrowed (Mir)
     read(*i);
 }
 
diff --git a/src/test/compile-fail/borrowck/borrowck-pat-reassign-binding.rs b/src/test/compile-fail/borrowck/borrowck-pat-reassign-binding.rs
index d176245823ef5..06bb98fa0ec10 100644
--- a/src/test/compile-fail/borrowck/borrowck-pat-reassign-binding.rs
+++ b/src/test/compile-fail/borrowck/borrowck-pat-reassign-binding.rs
@@ -8,6 +8,9 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
+// revisions: ast mir
+//[mir]compile-flags: -Z emit-end-regions -Z borrowck-mir
+
 fn main() {
     let mut x: Option<isize> = None;
     match x {
@@ -17,7 +20,9 @@ fn main() {
       }
       Some(ref i) => {
           // But on this branch, `i` is an outstanding borrow
-          x = Some(*i+1); //~ ERROR cannot assign to `x`
+          x = Some(*i+1); //[ast]~ ERROR cannot assign to `x`
+                          //[mir]~^ ERROR cannot assign to `x` because it is borrowed (Ast)
+                          //[mir]~| ERROR cannot assign to `x` because it is borrowed (Mir)
       }
     }
     x.clone(); // just to prevent liveness warnings
diff --git a/src/test/compile-fail/borrowck/borrowck-union-borrow.rs b/src/test/compile-fail/borrowck/borrowck-union-borrow.rs
index 20b882e1f807c..73d323ea82cfb 100644
--- a/src/test/compile-fail/borrowck/borrowck-union-borrow.rs
+++ b/src/test/compile-fail/borrowck/borrowck-union-borrow.rs
@@ -9,6 +9,8 @@
 // except according to those terms.
 
 // ignore-tidy-linelength
+// revisions: ast mir
+//[mir]compile-flags: -Z emit-end-regions -Z borrowck-mir
 
 #[derive(Clone, Copy)]
 union U {
@@ -30,11 +32,15 @@ fn main() {
         }
         {
             let ra = &u.a;
-            let rma = &mut u.a; //~ ERROR cannot borrow `u.a` as mutable because it is also borrowed as immutable
+            let rma = &mut u.a; //[ast]~ ERROR cannot borrow `u.a` as mutable because it is also borrowed as immutable
+                                //[mir]~^ ERROR cannot borrow `u.a` as mutable because it is also borrowed as immutable (Ast)
+                                //[mir]~| ERROR cannot borrow `u.0` as mutable because it is also borrowed as immutable (Mir)
         }
         {
             let ra = &u.a;
-            u.a = 1; //~ ERROR cannot assign to `u.a` because it is borrowed
+            u.a = 1; //[ast]~ ERROR cannot assign to `u.a` because it is borrowed
+                     //[mir]~^ ERROR cannot assign to `u.a` because it is borrowed (Ast)
+                     //[mir]~| ERROR cannot assign to `u.0` because it is borrowed (Mir)
         }
         // Imm borrow, other field
         {
@@ -47,45 +53,65 @@ fn main() {
         }
         {
             let ra = &u.a;
-            let rmb = &mut u.b; //~ ERROR cannot borrow `u` (via `u.b`) as mutable because `u` is also borrowed as immutable (via `u.a`)
+            let rmb = &mut u.b; //[ast]~ ERROR cannot borrow `u` (via `u.b`) as mutable because `u` is also borrowed as immutable (via `u.a`)
+                                //[mir]~^ ERROR cannot borrow `u` (via `u.b`) as mutable because `u` is also borrowed as immutable (via `u.a`) (Ast)
+                                // FIXME Error for MIR (needs support for union)
         }
         {
             let ra = &u.a;
-            u.b = 1; //~ ERROR cannot assign to `u.b` because it is borrowed
+            u.b = 1; //[ast]~ ERROR cannot assign to `u.b` because it is borrowed
+                     //[mir]~^ ERROR cannot assign to `u.b` because it is borrowed (Ast)
+                     // FIXME Error for MIR (needs support for union)
         }
         // Mut borrow, same field
         {
             let rma = &mut u.a;
-            let ra = &u.a; //~ ERROR cannot borrow `u.a` as immutable because it is also borrowed as mutable
+            let ra = &u.a; //[ast]~ ERROR cannot borrow `u.a` as immutable because it is also borrowed as mutable
+                         //[mir]~^ ERROR cannot borrow `u.a` as immutable because it is also borrowed as mutable (Ast)
+                         //[mir]~| ERROR cannot borrow `u.0` as immutable because it is also borrowed as mutable (Mir)
         }
         {
             let ra = &mut u.a;
-            let a = u.a; //~ ERROR cannot use `u.a` because it was mutably borrowed
+            let a = u.a; //[ast]~ ERROR cannot use `u.a` because it was mutably borrowed
+                         //[mir]~^ ERROR cannot use `u.a` because it was mutably borrowed (Ast)
+                         //[mir]~| ERROR cannot use `u.0` because it was mutably borrowed (Mir)
         }
         {
             let rma = &mut u.a;
-            let rma2 = &mut u.a; //~ ERROR cannot borrow `u.a` as mutable more than once at a time
+            let rma2 = &mut u.a; //[ast]~ ERROR cannot borrow `u.a` as mutable more than once at a time
+                                 //[mir]~^ ERROR cannot borrow `u.a` as mutable more than once at a time (Ast)
+                                 //[mir]~| ERROR cannot borrow `u.0` as mutable more than once at a time (Mir)
         }
         {
             let rma = &mut u.a;
-            u.a = 1; //~ ERROR cannot assign to `u.a` because it is borrowed
+            u.a = 1; //[ast]~ ERROR cannot assign to `u.a` because it is borrowed
+                     //[mir]~^ ERROR cannot assign to `u.a` because it is borrowed (Ast)
+                     //[mir]~| ERROR cannot assign to `u.0` because it is borrowed (Mir)
         }
         // Mut borrow, other field
         {
             let rma = &mut u.a;
-            let rb = &u.b; //~ ERROR cannot borrow `u` (via `u.b`) as immutable because `u` is also borrowed as mutable (via `u.a`)
+            let rb = &u.b; //[ast]~ ERROR cannot borrow `u` (via `u.b`) as immutable because `u` is also borrowed as mutable (via `u.a`)
+                           //[mir]~^ ERROR cannot borrow `u` (via `u.b`) as immutable because `u` is also borrowed as mutable (via `u.a`) (Ast)
+                           // FIXME Error for MIR (needs support for union)
         }
         {
             let ra = &mut u.a;
-            let b = u.b; //~ ERROR cannot use `u.b` because it was mutably borrowed
+            let b = u.b; //[ast]~ ERROR cannot use `u.b` because it was mutably borrowed
+                         //[mir]~^ ERROR cannot use `u.b` because it was mutably borrowed (Ast)
+                         // FIXME Error for MIR (needs support for union)
         }
         {
             let rma = &mut u.a;
-            let rmb2 = &mut u.b; //~ ERROR cannot borrow `u` (via `u.b`) as mutable more than once at a time
+            let rmb2 = &mut u.b; //[ast]~ ERROR cannot borrow `u` (via `u.b`) as mutable more than once at a time
+                                 //[mir]~^ ERROR cannot borrow `u` (via `u.b`) as mutable more than once at a time (Ast)
+                                 // FIXME Error for MIR (needs support for union)
         }
         {
             let rma = &mut u.a;
-            u.b = 1; //~ ERROR cannot assign to `u.b` because it is borrowed
+            u.b = 1; //[ast]~ ERROR cannot assign to `u.b` because it is borrowed
+                     //[mir]~^ ERROR cannot assign to `u.b` because it is borrowed (Ast)
+                     // FIXME Error for MIR (needs support for union)
         }
     }
 }
diff --git a/src/test/compile-fail/borrowck/borrowck-vec-pattern-move-tail.rs b/src/test/compile-fail/borrowck/borrowck-vec-pattern-move-tail.rs
index fddb9838c44b5..b5916584930b8 100644
--- a/src/test/compile-fail/borrowck/borrowck-vec-pattern-move-tail.rs
+++ b/src/test/compile-fail/borrowck/borrowck-vec-pattern-move-tail.rs
@@ -8,6 +8,9 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
+// revisions: ast mir
+//[mir]compile-flags: -Z emit-end-regions -Z borrowck-mir
+
 #![feature(slice_patterns)]
 
 fn main() {
@@ -17,7 +20,9 @@ fn main() {
         _ => unreachable!()
     };
     println!("t[0]: {}", t[0]);
-    a[2] = 0; //~ ERROR cannot assign to `a[..]` because it is borrowed
+    a[2] = 0; //[ast]~ ERROR cannot assign to `a[..]` because it is borrowed
+              //[mir]~^ ERROR cannot assign to `a[..]` because it is borrowed (Ast)
+              // FIXME Error for MIR (error missed)
     println!("t[0]: {}", t[0]);
     t[0];
 }
diff --git a/src/test/compile-fail/coerce-overloaded-autoderef.rs b/src/test/compile-fail/coerce-overloaded-autoderef.rs
index 14fbc34c43bb4..43b771ce5dbed 100644
--- a/src/test/compile-fail/coerce-overloaded-autoderef.rs
+++ b/src/test/compile-fail/coerce-overloaded-autoderef.rs
@@ -8,6 +8,9 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
+// revisions: ast mir
+//[mir]compile-flags: -Z emit-end-regions -Z borrowck-mir
+
 fn borrow_mut<T>(x: &mut T) -> &mut T { x }
 fn borrow<T>(x: &T) -> &T { x }
 
@@ -17,24 +20,32 @@ fn borrow2<T>(_: &mut T, _: &T) {}
 fn double_mut_borrow<T>(x: &mut Box<T>) {
     let y = borrow_mut(x);
     let z = borrow_mut(x);
-    //~^ ERROR cannot borrow `*x` as mutable more than once at a time
+    //[ast]~^ ERROR cannot borrow `*x` as mutable more than once at a time
+    //[mir]~^^ ERROR cannot borrow `*x` as mutable more than once at a time (Ast)
+    //[mir]~| ERROR cannot borrow `(*x)` as mutable more than once at a time (Mir)
 }
 
 fn double_imm_borrow(x: &mut Box<i32>) {
     let y = borrow(x);
     let z = borrow(x);
     **x += 1;
-    //~^ ERROR cannot assign to `**x` because it is borrowed
+    //[ast]~^ ERROR cannot assign to `**x` because it is borrowed
+    //[mir]~^^ ERROR cannot assign to `**x` because it is borrowed (Ast)
+    //[mir]~| ERROR cannot assign to `(*(*x))` because it is borrowed (Mir)
 }
 
 fn double_mut_borrow2<T>(x: &mut Box<T>) {
     borrow_mut2(x, x);
-    //~^ ERROR cannot borrow `*x` as mutable more than once at a time
+    //[ast]~^ ERROR cannot borrow `*x` as mutable more than once at a time
+    //[mir]~^^ ERROR cannot borrow `*x` as mutable more than once at a time (Ast)
+    //[mir]~| ERROR cannot borrow `(*x)` as mutable more than once at a time (Mir)
 }
 
 fn double_borrow2<T>(x: &mut Box<T>) {
     borrow2(x, x);
-    //~^ ERROR cannot borrow `*x` as immutable because it is also borrowed as mutable
+    //[ast]~^ ERROR cannot borrow `*x` as immutable because it is also borrowed as mutable
+    //[mir]~^^ ERROR cannot borrow `*x` as immutable because it is also borrowed as mutable (Ast)
+    //[mir]~| ERROR cannot borrow `(*x)` as immutable because it is also borrowed as mutable (Mir)
 }
 
 pub fn main() {}
diff --git a/src/test/compile-fail/feature-gate-dotdoteq_in_patterns.rs b/src/test/compile-fail/feature-gate-dotdoteq_in_patterns.rs
new file mode 100644
index 0000000000000..1fb139bf07f41
--- /dev/null
+++ b/src/test/compile-fail/feature-gate-dotdoteq_in_patterns.rs
@@ -0,0 +1,16 @@
+// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+pub fn main() {
+    match 22 {
+        0 ..= 3 => {} //~ ERROR `..=` syntax in patterns is experimental
+        _ => {}
+    }
+}
diff --git a/src/test/compile-fail/hrtb-identity-fn-borrows.rs b/src/test/compile-fail/hrtb-identity-fn-borrows.rs
index 17939cf9fe026..b6216ce058915 100644
--- a/src/test/compile-fail/hrtb-identity-fn-borrows.rs
+++ b/src/test/compile-fail/hrtb-identity-fn-borrows.rs
@@ -11,6 +11,9 @@
 // Test that the `'a` in the where clause correctly links the region
 // of the output to the region of the input.
 
+// revisions: ast mir
+//[mir]compile-flags: -Z emit-end-regions -Z borrowck-mir
+
 trait FnLike<A,R> {
     fn call(&self, arg: A) -> R;
 }
@@ -21,7 +24,9 @@ fn call_repeatedly<F>(f: F)
     // Result is stored: cannot re-assign `x`
     let mut x = 3;
     let y = f.call(&x);
-    x = 5; //~ ERROR cannot assign
+    x = 5; //[ast]~ ERROR cannot assign
+           //[mir]~^ ERROR cannot assign to `x` because it is borrowed (Ast)
+           //[mir]~| ERROR cannot assign to `x` because it is borrowed (Mir)
 
     // Result is not stored: can re-assign `x`
     let mut x = 3;
diff --git a/src/test/compile-fail/impossible_range.rs b/src/test/compile-fail/impossible_range.rs
index 94e048fed655e..e4465e9f6b611 100644
--- a/src/test/compile-fail/impossible_range.rs
+++ b/src/test/compile-fail/impossible_range.rs
@@ -18,12 +18,12 @@ pub fn main() {
     ..1;
     0..1;
 
-    ...; //~ERROR inclusive range with no end
+    ..=; //~ERROR inclusive range with no end
          //~^HELP bounded at the end
-    0...; //~ERROR inclusive range with no end
+    0..=; //~ERROR inclusive range with no end
           //~^HELP bounded at the end
-    ...1;
-    0...1;
+    ..=1;
+    0..=1;
 }
 
 
diff --git a/src/test/compile-fail/mut-pattern-internal-mutability.rs b/src/test/compile-fail/mut-pattern-internal-mutability.rs
index b0d618328dcca..3a84bd6565e8d 100644
--- a/src/test/compile-fail/mut-pattern-internal-mutability.rs
+++ b/src/test/compile-fail/mut-pattern-internal-mutability.rs
@@ -8,11 +8,16 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
+// revisions: ast mir
+//[mir]compile-flags: -Z emit-end-regions -Z borrowck-mir
+
 fn main() {
     let foo = &mut 1;
 
     let &mut x = foo;
-    x += 1; //~ ERROR re-assignment of immutable variable
+    x += 1; //[ast]~ ERROR re-assignment of immutable variable
+            //[mir]~^ ERROR re-assignment of immutable variable `x` (Ast)
+            //[mir]~| ERROR re-assignment of immutable variable `x` (Mir)
 
     // explicitly mut-ify internals
     let &mut mut x = foo;
@@ -20,5 +25,7 @@ fn main() {
 
     // check borrowing is detected successfully
     let &mut ref x = foo;
-    *foo += 1; //~ ERROR cannot assign to `*foo` because it is borrowed
+    *foo += 1; //[ast]~ ERROR cannot assign to `*foo` because it is borrowed
+               //[mir]~^ ERROR cannot assign to `*foo` because it is borrowed (Ast)
+               //[mir]~| ERROR cannot assign to `(*foo)` because it is borrowed (Mir)
 }
diff --git a/src/test/compile-fail/object-lifetime-default-mybox.rs b/src/test/compile-fail/object-lifetime-default-mybox.rs
index 014b0c1e80e71..54657e76e9702 100644
--- a/src/test/compile-fail/object-lifetime-default-mybox.rs
+++ b/src/test/compile-fail/object-lifetime-default-mybox.rs
@@ -34,7 +34,7 @@ fn load1<'a,'b>(a: &'a MyBox<SomeTrait>,
                 b: &'b MyBox<SomeTrait>)
                 -> &'b MyBox<SomeTrait>
 {
-    a //~ ERROR E0312
+    a //~ ERROR lifetime mismatch
 }
 
 fn load2<'a>(ss: &MyBox<SomeTrait+'a>) -> MyBox<SomeTrait+'a> {
diff --git a/src/test/compile-fail/range_inclusive_gate.rs b/src/test/compile-fail/range_inclusive_gate.rs
index 1d1153e951b7b..69b9a4c67adc3 100644
--- a/src/test/compile-fail/range_inclusive_gate.rs
+++ b/src/test/compile-fail/range_inclusive_gate.rs
@@ -14,7 +14,7 @@
 // #![feature(inclusive_range)]
 
 pub fn main() {
-    let _: std::ops::RangeInclusive<_> = { use std::intrinsics; 1 } ... { use std::intrinsics; 2 };
+    let _: std::ops::RangeInclusive<_> = { use std::intrinsics; 1 } ..= { use std::intrinsics; 2 };
     //~^ ERROR use of unstable library feature 'inclusive_range'
     //~| ERROR core_intrinsics
     //~| ERROR core_intrinsics
diff --git a/src/test/compile-fail/regions-pattern-typing-issue-19997.rs b/src/test/compile-fail/regions-pattern-typing-issue-19997.rs
index ae9ceb600d45c..91f5f048bc1c0 100644
--- a/src/test/compile-fail/regions-pattern-typing-issue-19997.rs
+++ b/src/test/compile-fail/regions-pattern-typing-issue-19997.rs
@@ -8,13 +8,18 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
+// revisions: ast mir
+//[mir]compile-flags: -Z emit-end-regions -Z borrowck-mir
+
 fn main() {
     let a0 = 0;
     let f = 1;
     let mut a1 = &a0;
     match (&a1,) {
         (&ref b0,) => {
-            a1 = &f; //~ ERROR cannot assign
+            a1 = &f; //[ast]~ ERROR cannot assign
+                     //[mir]~^ ERROR cannot assign to `a1` because it is borrowed (Ast)
+                     //[mir]~| ERROR cannot assign to `a1` because it is borrowed (Mir)
         }
     }
 }
diff --git a/src/test/compile-fail/synthetic-param.rs b/src/test/compile-fail/synthetic-param.rs
new file mode 100644
index 0000000000000..a9762e383fe4e
--- /dev/null
+++ b/src/test/compile-fail/synthetic-param.rs
@@ -0,0 +1,38 @@
+// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+#![feature(generic_param_attrs, rustc_attrs)]
+
+fn func<#[rustc_synthetic] T>(_: T) {}
+
+struct Foo;
+
+impl Foo {
+    pub fn func<#[rustc_synthetic] T>(_: T) {}
+}
+
+struct Bar<S> {
+    t: S
+}
+
+impl<S> Bar<S> {
+    pub fn func<#[rustc_synthetic] T>(_: T) {}
+}
+
+fn main() {
+    func::<u8>(42); //~ ERROR cannot provide explicit type parameters
+    func(42); // Ok
+
+    Foo::func::<u8>(42); //~ ERROR cannot provide explicit type parameters
+    Foo::func(42); // Ok
+
+    Bar::<i8>::func::<u8>(42); //~ ERROR cannot provide explicit type parameters
+    Bar::<i8>::func(42); // Ok
+}
diff --git a/src/test/incremental/hashes/indexing_expressions.rs b/src/test/incremental/hashes/indexing_expressions.rs
index bb31982d93f21..a12624d083248 100644
--- a/src/test/incremental/hashes/indexing_expressions.rs
+++ b/src/test/incremental/hashes/indexing_expressions.rs
@@ -153,5 +153,5 @@ fn exclusive_to_inclusive_range(slice: &[u32]) -> &[u32] {
 #[rustc_metadata_clean(cfg="cfail2")]
 #[rustc_metadata_clean(cfg="cfail3")]
 fn exclusive_to_inclusive_range(slice: &[u32]) -> &[u32] {
-    &slice[3...7]
+    &slice[3..=7]
 }
diff --git a/src/test/parse-fail/pat-ranges-1.rs b/src/test/parse-fail/pat-ranges-1.rs
index e1cbb961b1bcc..857a3924aec01 100644
--- a/src/test/parse-fail/pat-ranges-1.rs
+++ b/src/test/parse-fail/pat-ranges-1.rs
@@ -11,5 +11,5 @@
 // Parsing of range patterns
 
 fn main() {
-    let macropus!() ... 11 = 12; //~ error: expected one of `:`, `;`, or `=`, found `...`
+    let macropus!() ..= 11 = 12; //~ error: expected one of `:`, `;`, or `=`, found `..=`
 }
diff --git a/src/test/parse-fail/pat-ranges-2.rs b/src/test/parse-fail/pat-ranges-2.rs
index 04ad5ff083bc8..64c749333cf4a 100644
--- a/src/test/parse-fail/pat-ranges-2.rs
+++ b/src/test/parse-fail/pat-ranges-2.rs
@@ -11,5 +11,5 @@
 // Parsing of range patterns
 
 fn main() {
-    let 10 ... makropulos!() = 12; //~ error: expected one of `::`, `:`, `;`, or `=`, found `!`
+    let 10 ..= makropulos!() = 12; //~ error: expected one of `::`, `:`, `;`, or `=`, found `!`
 }
diff --git a/src/test/parse-fail/pat-ranges-3.rs b/src/test/parse-fail/pat-ranges-3.rs
index 5f7aac71d29b2..1327a9fab3661 100644
--- a/src/test/parse-fail/pat-ranges-3.rs
+++ b/src/test/parse-fail/pat-ranges-3.rs
@@ -11,5 +11,5 @@
 // Parsing of range patterns
 
 fn main() {
-    let 10 ... 10 + 3 = 12; //~ expected one of `:`, `;`, or `=`, found `+`
+    let 10 ..= 10 + 3 = 12; //~ expected one of `:`, `;`, or `=`, found `+`
 }
diff --git a/src/test/parse-fail/pat-ranges-4.rs b/src/test/parse-fail/pat-ranges-4.rs
index 4bbf387d1c0da..c159c7702502d 100644
--- a/src/test/parse-fail/pat-ranges-4.rs
+++ b/src/test/parse-fail/pat-ranges-4.rs
@@ -11,5 +11,6 @@
 // Parsing of range patterns
 
 fn main() {
-    let 10 - 3 ... 10 = 8; //~ error: expected one of `...`, `..`, `:`, `;`, or `=`, found `-`
+    let 10 - 3 ..= 10 = 8;
+    //~^ error: expected one of `...`, `..=`, `..`, `:`, `;`, or `=`, found `-`
 }
diff --git a/src/test/parse-fail/range_inclusive.rs b/src/test/parse-fail/range_inclusive.rs
index ce97372c66845..cc32b9903b5ac 100644
--- a/src/test/parse-fail/range_inclusive.rs
+++ b/src/test/parse-fail/range_inclusive.rs
@@ -13,7 +13,7 @@
 #![feature(inclusive_range_syntax, inclusive_range)]
 
 pub fn main() {
-    for _ in 1... {} //~ERROR inclusive range with no end
+    for _ in 1..= {} //~ERROR inclusive range with no end
                      //~^HELP bounded at the end
 }
 
diff --git a/src/test/parse-fail/range_inclusive_gate.rs b/src/test/parse-fail/range_inclusive_gate.rs
index 30dc6fc5b20a0..de690c3fea3cf 100644
--- a/src/test/parse-fail/range_inclusive_gate.rs
+++ b/src/test/parse-fail/range_inclusive_gate.rs
@@ -15,21 +15,21 @@
 // #![feature(inclusive_range_syntax, inclusive_range)]
 
 macro_rules! m {
-    () => { for _ in 1...10 {} } //~ ERROR inclusive range syntax is experimental
+    () => { for _ in 1..=10 {} } //~ ERROR inclusive range syntax is experimental
 }
 
 #[cfg(nope)]
 fn f() {}
 #[cfg(not(nope))]
 fn f() {
-    for _ in 1...10 {} //~ ERROR inclusive range syntax is experimental
+    for _ in 1..=10 {} //~ ERROR inclusive range syntax is experimental
 }
 
 #[cfg(nope)]
 macro_rules! n { () => {} }
 #[cfg(not(nope))]
 macro_rules! n {
-    () => { for _ in 1...10 {} } //~ ERROR inclusive range syntax is experimental
+    () => { for _ in 1..=10 {} } //~ ERROR inclusive range syntax is experimental
 }
 
 macro_rules! o {
@@ -38,7 +38,7 @@ macro_rules! o {
         fn g() {}
         #[cfg(not(nope))]
         fn g() {
-            for _ in 1...10 {} //~ ERROR inclusive range syntax is experimental
+            for _ in 1..=10 {} //~ ERROR inclusive range syntax is experimental
         }
 
         g();
@@ -54,7 +54,7 @@ macro_rules! p {
         fn h() {}
         #[cfg(not(nope))]
         fn h() {
-            for _ in 1...10 {} //~ ERROR inclusive range syntax is experimental
+            for _ in 1..=10 {} //~ ERROR inclusive range syntax is experimental
         }
 
         h();
@@ -62,8 +62,8 @@ macro_rules! p {
 }
 
 pub fn main() {
-    for _ in 1...10 {} //~ ERROR inclusive range syntax is experimental
-    for _ in ...10 {} //~ ERROR inclusive range syntax is experimental
+    for _ in 1..=10 {} //~ ERROR inclusive range syntax is experimental
+    for _ in ..=10 {} //~ ERROR inclusive range syntax is experimental
 
     f(); // not allowed in cfg'ed functions
 
diff --git a/src/test/run-make/codegen-options-parsing/Makefile b/src/test/run-make/codegen-options-parsing/Makefile
index dc46a8a04ef8c..755e211a34996 100644
--- a/src/test/run-make/codegen-options-parsing/Makefile
+++ b/src/test/run-make/codegen-options-parsing/Makefile
@@ -1,26 +1,28 @@
 -include ../tools.mk
 
+LOG = $(TMPDIR)/log.txt
+
 all:
 	#Option taking a number
-	$(RUSTC) -C codegen-units dummy.rs 2>&1 | \
-		grep 'codegen option `codegen-units` requires a number'
-	$(RUSTC) -C codegen-units= dummy.rs 2>&1 | \
-		grep 'incorrect value `` for codegen option `codegen-units` - a number was expected'
-	$(RUSTC) -C codegen-units=foo dummy.rs 2>&1 | \
-		grep 'incorrect value `foo` for codegen option `codegen-units` - a number was expected'
+	$(RUSTC) -C codegen-units dummy.rs 2>&1 | tee $(LOG)
+	grep 'codegen option `codegen-units` requires a number' $(LOG)
+	$(RUSTC) -C codegen-units= dummy.rs 2>&1 | tee $(LOG)
+	grep 'incorrect value `` for codegen option `codegen-units` - a number was expected' $(LOG)
+	$(RUSTC) -C codegen-units=foo dummy.rs 2>&1 | tee $(LOG)
+	grep 'incorrect value `foo` for codegen option `codegen-units` - a number was expected' $(LOG)
 	$(RUSTC) -C codegen-units=1 dummy.rs
 	#Option taking a string
-	$(RUSTC) -C extra-filename dummy.rs 2>&1 | \
-		grep 'codegen option `extra-filename` requires a string'
+	$(RUSTC) -C extra-filename dummy.rs 2>&1 | tee $(LOG)
+	grep 'codegen option `extra-filename` requires a string' $(LOG)
 	$(RUSTC) -C extra-filename= dummy.rs 2>&1
 	$(RUSTC) -C extra-filename=foo dummy.rs 2>&1
 	#Option taking no argument
-	$(RUSTC) -C lto= dummy.rs 2>&1 | \
-		grep 'codegen option `lto` takes no value'
-	$(RUSTC) -C lto=1 dummy.rs 2>&1 | \
-		grep 'codegen option `lto` takes no value'
-	$(RUSTC) -C lto=foo dummy.rs 2>&1 | \
-		grep 'codegen option `lto` takes no value'
+	$(RUSTC) -C lto= dummy.rs 2>&1 | tee $(LOG)
+	grep 'codegen option `lto` takes no value' $(LOG)
+	$(RUSTC) -C lto=1 dummy.rs 2>&1 | tee $(LOG)
+	grep 'codegen option `lto` takes no value' $(LOG)
+	$(RUSTC) -C lto=foo dummy.rs 2>&1 | tee $(LOG)
+	grep 'codegen option `lto` takes no value' $(LOG)
 	$(RUSTC) -C lto dummy.rs
 
 	# Should not link dead code...
diff --git a/src/test/run-make/llvm-phase/test.rs b/src/test/run-make/llvm-phase/test.rs
index 7a63871f19e38..2ff4593a801fe 100644
--- a/src/test/run-make/llvm-phase/test.rs
+++ b/src/test/run-make/llvm-phase/test.rs
@@ -77,6 +77,7 @@ fn main() {
         .split(' ').map(|s| s.to_string()).collect();
     args.push("--out-dir".to_string());
     args.push(env::var("TMPDIR").unwrap());
+    args.push("-Ccodegen-units=1".to_string());
 
     let (result, _) = rustc_driver::run_compiler(
         &args, &mut JitCalls, Some(box JitLoader), None);
diff --git a/src/test/run-pass-fulldeps/proc-macro/attr-cfg.rs b/src/test/run-pass-fulldeps/proc-macro/attr-cfg.rs
new file mode 100644
index 0000000000000..5a28d756df5a5
--- /dev/null
+++ b/src/test/run-pass-fulldeps/proc-macro/attr-cfg.rs
@@ -0,0 +1,39 @@
+// Copyright 2016 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+// aux-build:attr-cfg.rs
+// ignore-stage1
+// revisions: foo bar
+
+#![feature(proc_macro)]
+
+extern crate attr_cfg;
+use attr_cfg::attr_cfg;
+
+#[attr_cfg]
+fn outer() -> u8 {
+    #[cfg(foo)]
+    fn inner() -> u8 { 1 }
+
+    #[cfg(bar)]
+    fn inner() -> u8 { 2 }
+
+    inner()
+}
+
+#[cfg(foo)]
+fn main() {
+    assert_eq!(outer(), 1);
+}
+
+#[cfg(bar)]
+fn main() {
+    assert_eq!(outer(), 2);
+}
diff --git a/src/test/run-pass-fulldeps/proc-macro/auxiliary/attr-cfg.rs b/src/test/run-pass-fulldeps/proc-macro/auxiliary/attr-cfg.rs
new file mode 100644
index 0000000000000..9145c46cfc7c9
--- /dev/null
+++ b/src/test/run-pass-fulldeps/proc-macro/auxiliary/attr-cfg.rs
@@ -0,0 +1,32 @@
+// Copyright 2016 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+// no-prefer-dynamic
+#![feature(proc_macro)]
+#![crate_type = "proc-macro"]
+
+extern crate proc_macro;
+
+use proc_macro::TokenStream;
+
+#[proc_macro_attribute]
+pub fn attr_cfg(args: TokenStream, input: TokenStream) -> TokenStream {
+    let input_str = input.to_string();
+
+    assert_eq!(input_str, "fn outer() -> u8 {
+    #[cfg(foo)]
+    fn inner() -> u8 { 1 }
+    #[cfg(bar)]
+    fn inner() -> u8 { 2 }
+    inner()
+}");
+
+    input
+}
diff --git a/src/test/run-pass-fulldeps/proc-macro/auxiliary/derive-attr-cfg.rs b/src/test/run-pass-fulldeps/proc-macro/auxiliary/derive-attr-cfg.rs
new file mode 100644
index 0000000000000..787a4a470e257
--- /dev/null
+++ b/src/test/run-pass-fulldeps/proc-macro/auxiliary/derive-attr-cfg.rs
@@ -0,0 +1,23 @@
+// Copyright 2016 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+// no-prefer-dynamic
+#![feature(proc_macro)]
+#![crate_type = "proc-macro"]
+
+extern crate proc_macro;
+
+use proc_macro::TokenStream;
+
+#[proc_macro_derive(Foo, attributes(foo))]
+pub fn derive(input: TokenStream) -> TokenStream {
+    assert!(!input.to_string().contains("#[cfg(any())]"));
+    "".parse().unwrap()
+}
diff --git a/src/test/run-pass-fulldeps/proc-macro/derive-attr-cfg.rs b/src/test/run-pass-fulldeps/proc-macro/derive-attr-cfg.rs
new file mode 100644
index 0000000000000..b94c45248dae5
--- /dev/null
+++ b/src/test/run-pass-fulldeps/proc-macro/derive-attr-cfg.rs
@@ -0,0 +1,27 @@
+// Copyright 2016 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+// aux-build:derive-attr-cfg.rs
+// ignore-stage1
+
+#![feature(proc_macro)]
+
+extern crate derive_attr_cfg;
+use derive_attr_cfg::Foo;
+
+#[derive(Foo)]
+#[foo]
+struct S {
+    #[cfg(any())]
+    x: i32
+}
+
+fn main() {
+}
diff --git a/src/test/run-pass/for-loop-unconstrained-element-type-i32-fallback.rs b/src/test/run-pass/for-loop-unconstrained-element-type-i32-fallback.rs
index b36afcf87b3ee..0bfc4d2264c62 100644
--- a/src/test/run-pass/for-loop-unconstrained-element-type-i32-fallback.rs
+++ b/src/test/run-pass/for-loop-unconstrained-element-type-i32-fallback.rs
@@ -9,12 +9,12 @@
 // except according to those terms.
 
 // Test that the type of `sum` falls back to `i32` here,
-// and that the for loop desugaring doesn't inferfere with
+// and that the for loop desugaring doesn't interfere with
 // that.
 
 fn main() {
     let mut sum = 0;
     for i in Vec::new() {
-        sum += i;
+        sum += &i;
     }
 }
diff --git a/src/test/run-pass/inc-range-pat.rs b/src/test/run-pass/inc-range-pat.rs
new file mode 100644
index 0000000000000..5faf36eddaf06
--- /dev/null
+++ b/src/test/run-pass/inc-range-pat.rs
@@ -0,0 +1,22 @@
+// Copyright 2017 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+// Test old and new syntax for inclusive range patterns.
+#![feature(dotdoteq_in_patterns)]
+
+
+fn main() {
+    assert!(match 42 { 0 ... 100 => true, _ => false });
+    assert!(match 42 { 0 ..= 100 => true, _ => false });
+
+    assert!(match 'x' { 'a' ... 'z' => true, _ => false });
+    assert!(match 'x' { 'a' ..= 'z' => true, _ => false });
+}
+
diff --git a/src/test/run-pass/num-wrapping.rs b/src/test/run-pass/num-wrapping.rs
index 143759e271561..20c7f27336e25 100644
--- a/src/test/run-pass/num-wrapping.rs
+++ b/src/test/run-pass/num-wrapping.rs
@@ -173,6 +173,15 @@ fn test_op_assigns() {
                 tmp.$op(Wrapping($rhs));
                 assert_eq!(black_box(tmp), Wrapping($ans));
             }
+
+            // also test that a &Wrapping<T> right-hand side is possible
+            {
+                let mut tmp = Wrapping($initial);
+                tmp = black_box(tmp);
+                tmp.$op(&Wrapping($rhs));
+                assert_eq!(black_box(tmp), Wrapping($ans));
+            }
+
             // FIXME(30524): Uncomment this test
             /*
             {
diff --git a/src/test/run-pass/op-assign-builtins-by-ref.rs b/src/test/run-pass/op-assign-builtins-by-ref.rs
new file mode 100644
index 0000000000000..230d44ba647a5
--- /dev/null
+++ b/src/test/run-pass/op-assign-builtins-by-ref.rs
@@ -0,0 +1,84 @@
+// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+fn main() {
+    // test compound assignment operators with ref as right-hand side,
+    // for each operator, with various types as operands.
+
+    // test AddAssign
+    {
+        let mut x = 3i8;
+        x += &2i8;
+        assert_eq!(x, 5i8);
+    }
+
+    // test SubAssign
+    {
+        let mut x = 7i16;
+        x -= &4;
+        assert_eq!(x, 3i16);
+    }
+
+    // test MulAssign
+    {
+        let mut x = 3f32;
+        x *= &3f32;
+        assert_eq!(x, 9f32);
+    }
+
+    // test DivAssign
+    {
+        let mut x = 6f64;
+        x /= &2f64;
+        assert_eq!(x, 3f64);
+    }
+
+    // test RemAssign
+    {
+        let mut x = 7i64;
+        x %= &4i64;
+        assert_eq!(x, 3i64);
+    }
+
+    // test BitOrAssign
+    {
+        let mut x = 0b1010u8;
+        x |= &0b1100u8;
+        assert_eq!(x, 0b1110u8);
+    }
+
+    // test BitAndAssign
+    {
+        let mut x = 0b1010u16;
+        x &= &0b1100u16;
+        assert_eq!(x, 0b1000u16);
+    }
+
+    // test BitXorAssign
+    {
+        let mut x = 0b1010u32;
+        x ^= &0b1100u32;
+        assert_eq!(x, 0b0110u32);
+    }
+
+    // test ShlAssign
+    {
+        let mut x = 0b1010u64;
+        x <<= &2u32;
+        assert_eq!(x, 0b101000u64);
+    }
+
+    // test ShrAssign
+    {
+        let mut x = 0b1010u64;
+        x >>= &2i16;
+        assert_eq!(x, 0b10u64);
+    }
+}
diff --git a/src/test/run-pass/range_inclusive.rs b/src/test/run-pass/range_inclusive.rs
index f6119e709990a..71e11804052db 100644
--- a/src/test/run-pass/range_inclusive.rs
+++ b/src/test/run-pass/range_inclusive.rs
@@ -17,18 +17,18 @@ use std::ops::{RangeInclusive, RangeToInclusive};
 fn foo() -> isize { 42 }
 
 // Test that range syntax works in return statements
-fn return_range_to() -> RangeToInclusive<i32> { return ...1; }
+fn return_range_to() -> RangeToInclusive<i32> { return ..=1; }
 
 pub fn main() {
     let mut count = 0;
-    for i in 0_usize...10 {
+    for i in 0_usize..=10 {
         assert!(i >= 0 && i <= 10);
         count += i;
     }
     assert_eq!(count, 55);
 
     let mut count = 0;
-    let mut range = 0_usize...10;
+    let mut range = 0_usize..=10;
     for i in range {
         assert!(i >= 0 && i <= 10);
         count += i;
@@ -36,53 +36,53 @@ pub fn main() {
     assert_eq!(count, 55);
 
     let mut count = 0;
-    for i in (0_usize...10).step_by(2) {
+    for i in (0_usize..=10).step_by(2) {
         assert!(i >= 0 && i <= 10 && i % 2 == 0);
         count += i;
     }
     assert_eq!(count, 30);
 
-    let _ = 0_usize...4+4-3;
-    let _ = 0...foo();
+    let _ = 0_usize..=4+4-3;
+    let _ = 0..=foo();
 
-    let _ = { &42...&100 }; // references to literals are OK
-    let _ = ...42_usize;
+    let _ = { &42..=&100 }; // references to literals are OK
+    let _ = ..=42_usize;
 
     // Test we can use two different types with a common supertype.
     let x = &42;
     {
         let y = 42;
-        let _ = x...&y;
+        let _ = x..=&y;
     }
 
     // test collection indexing
-    let vec = (0...10).collect::<Vec<_>>();
+    let vec = (0..=10).collect::<Vec<_>>();
     let slice: &[_] = &*vec;
     let string = String::from("hello world");
     let stir = "hello world";
 
-    assert_eq!(&vec[3...6], &[3, 4, 5, 6]);
-    assert_eq!(&vec[ ...6], &[0, 1, 2, 3, 4, 5, 6]);
+    assert_eq!(&vec[3..=6], &[3, 4, 5, 6]);
+    assert_eq!(&vec[ ..=6], &[0, 1, 2, 3, 4, 5, 6]);
 
-    assert_eq!(&slice[3...6], &[3, 4, 5, 6]);
-    assert_eq!(&slice[ ...6], &[0, 1, 2, 3, 4, 5, 6]);
+    assert_eq!(&slice[3..=6], &[3, 4, 5, 6]);
+    assert_eq!(&slice[ ..=6], &[0, 1, 2, 3, 4, 5, 6]);
 
-    assert_eq!(&string[3...6], "lo w");
-    assert_eq!(&string[ ...6], "hello w");
+    assert_eq!(&string[3..=6], "lo w");
+    assert_eq!(&string[ ..=6], "hello w");
 
-    assert_eq!(&stir[3...6], "lo w");
-    assert_eq!(&stir[ ...6], "hello w");
+    assert_eq!(&stir[3..=6], "lo w");
+    assert_eq!(&stir[ ..=6], "hello w");
 
     // test the size hints and emptying
-    let mut long = 0...255u8;
-    let mut short = 42...42u8;
+    let mut long = 0..=255u8;
+    let mut short = 42..=42u8;
     assert_eq!(long.size_hint(), (256, Some(256)));
     assert_eq!(short.size_hint(), (1, Some(1)));
     long.next();
     short.next();
     assert_eq!(long.size_hint(), (255, Some(255)));
     assert_eq!(short.size_hint(), (0, Some(0)));
-    assert_eq!(short, 1...0);
+    assert_eq!(short, 1..=0);
 
     assert_eq!(long.len(), 255);
     assert_eq!(short.len(), 0);
@@ -94,31 +94,31 @@ pub fn main() {
     assert_eq!(long.next(), Some(1));
     assert_eq!(long.next(), Some(2));
     assert_eq!(long.next_back(), Some(252));
-    for i in 3...251 {
+    for i in 3..=251 {
         assert_eq!(long.next(), Some(i));
     }
-    assert_eq!(long, 1...0);
+    assert_eq!(long, 1..=0);
 
     // check underflow
-    let mut narrow = 1...0;
+    let mut narrow = 1..=0;
     assert_eq!(narrow.next_back(), None);
-    assert_eq!(narrow, 1...0);
-    let mut zero = 0u8...0;
+    assert_eq!(narrow, 1..=0);
+    let mut zero = 0u8..=0;
     assert_eq!(zero.next_back(), Some(0));
     assert_eq!(zero.next_back(), None);
-    assert_eq!(zero, 1...0);
-    let mut high = 255u8...255;
+    assert_eq!(zero, 1..=0);
+    let mut high = 255u8..=255;
     assert_eq!(high.next_back(), Some(255));
     assert_eq!(high.next_back(), None);
-    assert_eq!(high, 1...0);
+    assert_eq!(high, 1..=0);
 
     // what happens if you have a nonsense range?
-    let mut nonsense = 10...5;
+    let mut nonsense = 10..=5;
     assert_eq!(nonsense.next(), None);
-    assert_eq!(nonsense, 10...5);
+    assert_eq!(nonsense, 10..=5);
 
     // output
-    assert_eq!(format!("{:?}", 0...10), "0...10");
-    assert_eq!(format!("{:?}", ...10), "...10");
-    assert_eq!(format!("{:?}", long), "1...0");
+    assert_eq!(format!("{:?}", 0..=10), "0..=10");
+    assert_eq!(format!("{:?}", ..=10), "..=10");
+    assert_eq!(format!("{:?}", long), "1..=0");
 }
diff --git a/src/test/run-pass/range_inclusive_gate.rs b/src/test/run-pass/range_inclusive_gate.rs
index 5e0ec19d6b325..570087aedbbaa 100644
--- a/src/test/run-pass/range_inclusive_gate.rs
+++ b/src/test/run-pass/range_inclusive_gate.rs
@@ -14,7 +14,7 @@
 
 fn main() {
     let mut count = 0;
-    for i in 0_usize...10 {
+    for i in 0_usize..=10 {
         assert!(i >= 0 && i <= 10);
         count += i;
     }
diff --git a/src/test/ui-fulldeps/lint-plugin-cmdline-allow.stderr b/src/test/ui-fulldeps/lint-plugin-cmdline-allow.stderr
index 7c9c4e9903908..0cc3a5b6bf31d 100644
--- a/src/test/ui-fulldeps/lint-plugin-cmdline-allow.stderr
+++ b/src/test/ui-fulldeps/lint-plugin-cmdline-allow.stderr
@@ -2,7 +2,7 @@ warning: function is never used: `lintme`
   --> $DIR/lint-plugin-cmdline-allow.rs:20:1
    |
 20 | fn lintme() { }
-   | ^^^^^^^^^^^^^^^
+   | ^^^^^^^^^^^
    |
 note: lint level defined here
   --> $DIR/lint-plugin-cmdline-allow.rs:17:9
diff --git a/src/test/ui/lifetime-errors/ex1-return-one-existing-name-if-else-using-impl.stderr b/src/test/ui/lifetime-errors/ex1-return-one-existing-name-if-else-using-impl.stderr
index 9e4f6c421790f..cb9a1edf1ddf9 100644
--- a/src/test/ui/lifetime-errors/ex1-return-one-existing-name-if-else-using-impl.stderr
+++ b/src/test/ui/lifetime-errors/ex1-return-one-existing-name-if-else-using-impl.stderr
@@ -1,27 +1,13 @@
-error[E0312]: lifetime of reference outlives lifetime of borrowed content...
+error[E0623]: lifetime mismatch
   --> $DIR/ex1-return-one-existing-name-if-else-using-impl.rs:21:20
    |
+19 |     fn foo<'a>(x: &i32, y: &'a i32) -> &'a i32 {
+   |                   ----                 -------
+   |                   |
+   |                   this parameter and the return type are declared with different lifetimes...
+20 | 
 21 |         if x > y { x } else { y }
-   |                    ^
-   |
-note: ...the reference is valid for the lifetime 'a as defined on the method body at 19:5...
-  --> $DIR/ex1-return-one-existing-name-if-else-using-impl.rs:19:5
-   |
-19 | /     fn foo<'a>(x: &i32, y: &'a i32) -> &'a i32 {
-20 | |
-21 | |         if x > y { x } else { y }
-22 | |
-23 | |     }
-   | |_____^
-note: ...but the borrowed content is only valid for the anonymous lifetime #1 defined on the method body at 19:5
-  --> $DIR/ex1-return-one-existing-name-if-else-using-impl.rs:19:5
-   |
-19 | /     fn foo<'a>(x: &i32, y: &'a i32) -> &'a i32 {
-20 | |
-21 | |         if x > y { x } else { y }
-22 | |
-23 | |     }
-   | |_____^
+   |                    ^ ...but data from `x` is returned here
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/lifetime-errors/ex1-return-one-existing-name-return-type-is-anon.stderr b/src/test/ui/lifetime-errors/ex1-return-one-existing-name-return-type-is-anon.stderr
index e3fd0192053b9..8af6acc62c436 100644
--- a/src/test/ui/lifetime-errors/ex1-return-one-existing-name-return-type-is-anon.stderr
+++ b/src/test/ui/lifetime-errors/ex1-return-one-existing-name-return-type-is-anon.stderr
@@ -1,27 +1,13 @@
-error[E0312]: lifetime of reference outlives lifetime of borrowed content...
+error[E0623]: lifetime mismatch
   --> $DIR/ex1-return-one-existing-name-return-type-is-anon.rs:18:5
    |
+16 |   fn foo<'a>(&self, x: &'a i32) -> &i32 {
+   |                        -------     ----
+   |                        |
+   |                        this parameter and the return type are declared with different lifetimes...
+17 | 
 18 |     x
-   |     ^
-   |
-note: ...the reference is valid for the anonymous lifetime #1 defined on the method body at 16:3...
-  --> $DIR/ex1-return-one-existing-name-return-type-is-anon.rs:16:3
-   |
-16 | /   fn foo<'a>(&self, x: &'a i32) -> &i32 {
-17 | |
-18 | |     x
-19 | |
-20 | |   }
-   | |___^
-note: ...but the borrowed content is only valid for the lifetime 'a as defined on the method body at 16:3
-  --> $DIR/ex1-return-one-existing-name-return-type-is-anon.rs:16:3
-   |
-16 | /   fn foo<'a>(&self, x: &'a i32) -> &i32 {
-17 | |
-18 | |     x
-19 | |
-20 | |   }
-   | |___^
+   |     ^ ...but data from `x` is returned here
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/lifetime-errors/ex1-return-one-existing-name-self-is-anon.stderr b/src/test/ui/lifetime-errors/ex1-return-one-existing-name-self-is-anon.stderr
index 8551f015db527..c09de0c33af7a 100644
--- a/src/test/ui/lifetime-errors/ex1-return-one-existing-name-self-is-anon.stderr
+++ b/src/test/ui/lifetime-errors/ex1-return-one-existing-name-self-is-anon.stderr
@@ -1,27 +1,13 @@
-error[E0312]: lifetime of reference outlives lifetime of borrowed content...
+error[E0623]: lifetime mismatch
   --> $DIR/ex1-return-one-existing-name-self-is-anon.rs:18:30
    |
+16 |     fn foo<'a>(&self, x: &'a Foo) -> &'a Foo {
+   |                -----                 -------
+   |                |
+   |                this parameter and the return type are declared with different lifetimes...
+17 | 
 18 |         if true { x } else { self }
-   |                              ^^^^
-   |
-note: ...the reference is valid for the lifetime 'a as defined on the method body at 16:5...
-  --> $DIR/ex1-return-one-existing-name-self-is-anon.rs:16:5
-   |
-16 | /     fn foo<'a>(&self, x: &'a Foo) -> &'a Foo {
-17 | |
-18 | |         if true { x } else { self }
-19 | |
-20 | |     }
-   | |_____^
-note: ...but the borrowed content is only valid for the anonymous lifetime #1 defined on the method body at 16:5
-  --> $DIR/ex1-return-one-existing-name-self-is-anon.rs:16:5
-   |
-16 | /     fn foo<'a>(&self, x: &'a Foo) -> &'a Foo {
-17 | |
-18 | |         if true { x } else { self }
-19 | |
-20 | |     }
-   | |_____^
+   |                              ^^^^ ...but data from `self` is returned here
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/lifetime-errors/ex3-both-anon-regions-both-are-structs-3.stderr b/src/test/ui/lifetime-errors/ex3-both-anon-regions-both-are-structs-3.stderr
index 1b5ac7c7b57ee..73460277de44c 100644
--- a/src/test/ui/lifetime-errors/ex3-both-anon-regions-both-are-structs-3.stderr
+++ b/src/test/ui/lifetime-errors/ex3-both-anon-regions-both-are-structs-3.stderr
@@ -4,7 +4,7 @@ error[E0623]: lifetime mismatch
 15 | fn foo(mut x: Ref) {
    |               ---
    |               |
-   |               this type was declared with multiple lifetimes...
+   |               this type is declared with multiple lifetimes...
 16 |     x.a = x.b;
    |           ^^^ ...but data with one lifetime flows into the other here
 
diff --git a/src/test/ui/lifetime-errors/ex3-both-anon-regions-both-are-structs-4.stderr b/src/test/ui/lifetime-errors/ex3-both-anon-regions-both-are-structs-4.stderr
index 689a1ac292b33..fb524ae62c57a 100644
--- a/src/test/ui/lifetime-errors/ex3-both-anon-regions-both-are-structs-4.stderr
+++ b/src/test/ui/lifetime-errors/ex3-both-anon-regions-both-are-structs-4.stderr
@@ -4,7 +4,7 @@ error[E0623]: lifetime mismatch
 15 | fn foo(mut x: Ref) {
    |               ---
    |               |
-   |               this type was declared with multiple lifetimes...
+   |               this type is declared with multiple lifetimes...
 16 |     x.a = x.b;
    |           ^^^ ...but data with one lifetime flows into the other here
 
diff --git a/src/test/ui/lifetime-errors/ex3-both-anon-regions-return-type-is-anon.stderr b/src/test/ui/lifetime-errors/ex3-both-anon-regions-return-type-is-anon.stderr
index 890f9b311e7d2..1409b2161330b 100644
--- a/src/test/ui/lifetime-errors/ex3-both-anon-regions-return-type-is-anon.stderr
+++ b/src/test/ui/lifetime-errors/ex3-both-anon-regions-return-type-is-anon.stderr
@@ -1,23 +1,12 @@
-error[E0312]: lifetime of reference outlives lifetime of borrowed content...
+error[E0623]: lifetime mismatch
   --> $DIR/ex3-both-anon-regions-return-type-is-anon.rs:17:5
    |
+16 |   fn foo<'a>(&self, x: &i32) -> &i32 {
+   |                        ----     ----
+   |                        |
+   |                        this parameter and the return type are declared with different lifetimes...
 17 |     x
-   |     ^
-   |
-note: ...the reference is valid for the anonymous lifetime #1 defined on the method body at 16:3...
-  --> $DIR/ex3-both-anon-regions-return-type-is-anon.rs:16:3
-   |
-16 | /   fn foo<'a>(&self, x: &i32) -> &i32 {
-17 | |     x
-18 | |   }
-   | |___^
-note: ...but the borrowed content is only valid for the anonymous lifetime #2 defined on the method body at 16:3
-  --> $DIR/ex3-both-anon-regions-return-type-is-anon.rs:16:3
-   |
-16 | /   fn foo<'a>(&self, x: &i32) -> &i32 {
-17 | |     x
-18 | |   }
-   | |___^
+   |     ^ ...but data from `x` is returned here
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/lifetime-errors/ex3-both-anon-regions-self-is-anon.stderr b/src/test/ui/lifetime-errors/ex3-both-anon-regions-self-is-anon.stderr
index 43f00c32c6285..cae45023e26b2 100644
--- a/src/test/ui/lifetime-errors/ex3-both-anon-regions-self-is-anon.stderr
+++ b/src/test/ui/lifetime-errors/ex3-both-anon-regions-self-is-anon.stderr
@@ -1,23 +1,12 @@
-error[E0312]: lifetime of reference outlives lifetime of borrowed content...
+error[E0623]: lifetime mismatch
   --> $DIR/ex3-both-anon-regions-self-is-anon.rs:17:19
    |
+16 |     fn foo<'a>(&self, x: &Foo) -> &Foo {
+   |                          ----     ----
+   |                          |
+   |                          this parameter and the return type are declared with different lifetimes...
 17 |         if true { x } else { self }
-   |                   ^
-   |
-note: ...the reference is valid for the anonymous lifetime #1 defined on the method body at 16:5...
-  --> $DIR/ex3-both-anon-regions-self-is-anon.rs:16:5
-   |
-16 | /     fn foo<'a>(&self, x: &Foo) -> &Foo {
-17 | |         if true { x } else { self }
-18 | |     }
-   | |_____^
-note: ...but the borrowed content is only valid for the anonymous lifetime #2 defined on the method body at 16:5
-  --> $DIR/ex3-both-anon-regions-self-is-anon.rs:16:5
-   |
-16 | /     fn foo<'a>(&self, x: &Foo) -> &Foo {
-17 | |         if true { x } else { self }
-18 | |     }
-   | |_____^
+   |                   ^ ...but data from `x` is returned here
 
 error: aborting due to previous error
 
diff --git a/src/test/compile-fail/issue-16747.rs b/src/test/ui/lifetimes/lifetime-doesnt-live-long-enough.rs
similarity index 78%
rename from src/test/compile-fail/issue-16747.rs
rename to src/test/ui/lifetimes/lifetime-doesnt-live-long-enough.rs
index dd7e8a869eca9..465b42710352d 100644
--- a/src/test/compile-fail/issue-16747.rs
+++ b/src/test/ui/lifetimes/lifetime-doesnt-live-long-enough.rs
@@ -16,14 +16,16 @@ trait Collection { fn len(&self) -> usize; }
 
 struct List<'a, T: ListItem<'a>> {
     slice: &'a [T]
-//~^ ERROR the parameter type `T` may not live long enough
-//~| HELP consider adding an explicit lifetime bound
-//~| NOTE ...so that the reference type `&'a [T]` does not outlive the data it points at
 }
+
 impl<'a, T: ListItem<'a>> Collection for List<'a, T> {
     fn len(&self) -> usize {
         0
     }
 }
 
+struct Foo<T> {
+    foo: &'static T
+}
+
 fn main() {}
diff --git a/src/test/ui/lifetimes/lifetime-doesnt-live-long-enough.stderr b/src/test/ui/lifetimes/lifetime-doesnt-live-long-enough.stderr
new file mode 100644
index 0000000000000..e17a660c59170
--- /dev/null
+++ b/src/test/ui/lifetimes/lifetime-doesnt-live-long-enough.stderr
@@ -0,0 +1,30 @@
+error[E0309]: the parameter type `T` may not live long enough
+  --> $DIR/lifetime-doesnt-live-long-enough.rs:18:5
+   |
+17 | struct List<'a, T: ListItem<'a>> {
+   |                 -- help: consider adding an explicit lifetime bound `T: 'a`...
+18 |     slice: &'a [T]
+   |     ^^^^^^^^^^^^^^
+   |
+note: ...so that the reference type `&'a [T]` does not outlive the data it points at
+  --> $DIR/lifetime-doesnt-live-long-enough.rs:18:5
+   |
+18 |     slice: &'a [T]
+   |     ^^^^^^^^^^^^^^
+
+error[E0310]: the parameter type `T` may not live long enough
+  --> $DIR/lifetime-doesnt-live-long-enough.rs:28:5
+   |
+27 | struct Foo<T> {
+   |            - help: consider adding an explicit lifetime bound `T: 'static`...
+28 |     foo: &'static T
+   |     ^^^^^^^^^^^^^^^
+   |
+note: ...so that the reference type `&'static T` does not outlive the data it points at
+  --> $DIR/lifetime-doesnt-live-long-enough.rs:28:5
+   |
+28 |     foo: &'static T
+   |     ^^^^^^^^^^^^^^^
+
+error: aborting due to 2 previous errors
+
diff --git a/src/test/ui/path-lookahead.stderr b/src/test/ui/path-lookahead.stderr
index 9936a1eb81e2a..1d4ab35046b48 100644
--- a/src/test/ui/path-lookahead.stderr
+++ b/src/test/ui/path-lookahead.stderr
@@ -9,10 +9,8 @@ warning: unnecessary parentheses around `return` value
 warning: function is never used: `with_parens`
   --> $DIR/path-lookahead.rs:17:1
    |
-17 | / fn with_parens<T: ToString>(arg: T) -> String { //~WARN function is never used: `with_parens`
-18 | |   return (<T as ToString>::to_string(&arg)); //~WARN unnecessary parentheses around `return` value
-19 | | }
-   | |_^
+17 | fn with_parens<T: ToString>(arg: T) -> String { //~WARN function is never used: `with_parens`
+   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
 note: lint level defined here
   --> $DIR/path-lookahead.rs:13:9
@@ -24,8 +22,6 @@ note: lint level defined here
 warning: function is never used: `no_parens`
   --> $DIR/path-lookahead.rs:21:1
    |
-21 | / fn no_parens<T: ToString>(arg: T) -> String { //~WARN function is never used: `no_parens`
-22 | |   return <T as ToString>::to_string(&arg);
-23 | | }
-   | |_^
+21 | fn no_parens<T: ToString>(arg: T) -> String { //~WARN function is never used: `no_parens`
+   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
diff --git a/src/test/ui/span/unused-warning-point-at-signature.rs b/src/test/ui/span/unused-warning-point-at-signature.rs
new file mode 100644
index 0000000000000..eb659d08da0c9
--- /dev/null
+++ b/src/test/ui/span/unused-warning-point-at-signature.rs
@@ -0,0 +1,40 @@
+// Copyright 2017 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+// run-pass
+
+#![warn(unused)]
+
+enum Enum {
+    A,
+    B,
+    C,
+    D,
+}
+
+struct Struct {
+    a: usize,
+    b: usize,
+    c: usize,
+    d: usize,
+}
+
+fn func() -> usize {
+    3
+}
+
+fn
+func_complete_span()
+-> usize
+{
+    3
+}
+
+fn main() {}
diff --git a/src/test/ui/span/unused-warning-point-at-signature.stderr b/src/test/ui/span/unused-warning-point-at-signature.stderr
new file mode 100644
index 0000000000000..8e658670e9c0c
--- /dev/null
+++ b/src/test/ui/span/unused-warning-point-at-signature.stderr
@@ -0,0 +1,36 @@
+warning: enum is never used: `Enum`
+  --> $DIR/unused-warning-point-at-signature.rs:15:1
+   |
+15 | enum Enum {
+   | ^^^^^^^^^
+   |
+note: lint level defined here
+  --> $DIR/unused-warning-point-at-signature.rs:13:9
+   |
+13 | #![warn(unused)]
+   |         ^^^^^^
+   = note: #[warn(dead_code)] implied by #[warn(unused)]
+
+warning: struct is never used: `Struct`
+  --> $DIR/unused-warning-point-at-signature.rs:22:1
+   |
+22 | struct Struct {
+   | ^^^^^^^^^^^^^
+
+warning: function is never used: `func`
+  --> $DIR/unused-warning-point-at-signature.rs:29:1
+   |
+29 | fn func() -> usize {
+   | ^^^^^^^^^^^^^^^^^^
+
+warning: function is never used: `func_complete_span`
+  --> $DIR/unused-warning-point-at-signature.rs:33:1
+   |
+33 | / fn
+34 | | func_complete_span()
+35 | | -> usize
+36 | | {
+37 | |     3
+38 | | }
+   | |_^
+
diff --git a/src/test/ui/suggestions/try-on-option.rs b/src/test/ui/suggestions/try-on-option.rs
new file mode 100644
index 0000000000000..4cd8cd81151cc
--- /dev/null
+++ b/src/test/ui/suggestions/try-on-option.rs
@@ -0,0 +1,25 @@
+// Copyright 2017 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+#![feature(try_trait)]
+
+fn main() {}
+
+fn foo() -> Result<u32, ()> {
+    let x: Option<u32> = None;
+    x?;
+    Ok(22)
+}
+
+fn bar() -> u32 {
+    let x: Option<u32> = None;
+    x?;
+    22
+}
diff --git a/src/test/ui/suggestions/try-on-option.stderr b/src/test/ui/suggestions/try-on-option.stderr
new file mode 100644
index 0000000000000..86d4510cad3c2
--- /dev/null
+++ b/src/test/ui/suggestions/try-on-option.stderr
@@ -0,0 +1,22 @@
+error[E0277]: the trait bound `(): std::convert::From<std::option::NoneError>` is not satisfied
+  --> $DIR/try-on-option.rs:17:5
+   |
+17 |     x?;
+   |     ^^ the trait `std::convert::From<std::option::NoneError>` is not implemented for `()`
+   |
+   = note: required by `std::convert::From::from`
+
+error[E0277]: the `?` operator can only be used in a function that returns `Result` (or another type that implements `std::ops::Try`)
+  --> $DIR/try-on-option.rs:23:5
+   |
+23 |     x?;
+   |     --
+   |     |
+   |     cannot use the `?` operator in a function that returns `u32`
+   |     in this macro invocation
+   |
+   = help: the trait `std::ops::Try` is not implemented for `u32`
+   = note: required by `std::ops::Try::from_error`
+
+error: aborting due to 2 previous errors
+
diff --git a/src/tools/build-manifest/src/main.rs b/src/tools/build-manifest/src/main.rs
index 028ef729960e3..db957a7a0fcda 100644
--- a/src/tools/build-manifest/src/main.rs
+++ b/src/tools/build-manifest/src/main.rs
@@ -50,6 +50,7 @@ static TARGETS: &'static [&'static str] = &[
     "aarch64-unknown-fuchsia",
     "aarch64-linux-android",
     "aarch64-unknown-linux-gnu",
+    "aarch64-unknown-linux-musl",
     "arm-linux-androideabi",
     "arm-unknown-linux-gnueabi",
     "arm-unknown-linux-gnueabihf",
@@ -108,6 +109,7 @@ struct Manifest {
     manifest_version: String,
     date: String,
     pkg: BTreeMap<String, Package>,
+    renames: BTreeMap<String, Rename>
 }
 
 #[derive(Serialize)]
@@ -117,6 +119,11 @@ struct Package {
     target: BTreeMap<String, Target>,
 }
 
+#[derive(Serialize)]
+struct Rename {
+    to: String,
+}
+
 #[derive(Serialize)]
 struct Target {
     available: bool,
@@ -236,6 +243,7 @@ impl Builder {
             manifest_version: "2".to_string(),
             date: self.date.to_string(),
             pkg: BTreeMap::new(),
+            renames: BTreeMap::new(),
         };
 
         self.package("rustc", &mut manifest.pkg, HOSTS);
@@ -244,14 +252,11 @@ impl Builder {
         self.package("rust-std", &mut manifest.pkg, TARGETS);
         self.package("rust-docs", &mut manifest.pkg, TARGETS);
         self.package("rust-src", &mut manifest.pkg, &["*"]);
-        let rls_package_name = if self.rust_release == "nightly" {
-            "rls"
-        } else {
-            "rls-preview"
-        };
-        self.package(rls_package_name, &mut manifest.pkg, HOSTS);
+        self.package("rls-preview", &mut manifest.pkg, HOSTS);
         self.package("rust-analysis", &mut manifest.pkg, TARGETS);
 
+        manifest.renames.insert("rls".to_owned(), Rename { to: "rls-preview".to_owned() });
+
         let mut pkg = Package {
             version: self.cached_version("rust").to_string(),
             git_commit_hash: self.cached_git_commit_hash("rust").clone(),
@@ -287,7 +292,7 @@ impl Builder {
             }
 
             extensions.push(Component {
-                pkg: rls_package_name.to_string(),
+                pkg: "rls-preview".to_string(),
                 target: host.to_string(),
             });
             extensions.push(Component {
@@ -319,7 +324,7 @@ impl Builder {
         }
         manifest.pkg.insert("rust".to_string(), pkg);
 
-        return manifest
+        return manifest;
     }
 
     fn package(&mut self,
diff --git a/src/tools/cargo b/src/tools/cargo
index 8118b02ac5ce4..e447ac7e94b7f 160000
--- a/src/tools/cargo
+++ b/src/tools/cargo
@@ -1 +1 @@
-Subproject commit 8118b02ac5ce49b22e049ff03316d5e1574852cf
+Subproject commit e447ac7e94b7f56ab13e361f9e324dafe3eb0a34
diff --git a/src/tools/cargotest/main.rs b/src/tools/cargotest/main.rs
index 012ee835494e8..0a9da26d9968d 100644
--- a/src/tools/cargotest/main.rs
+++ b/src/tools/cargotest/main.rs
@@ -49,7 +49,7 @@ const TEST_REPOS: &'static [Test] = &[
     Test {
         name: "xsv",
         repo: "https://github.com/BurntSushi/xsv",
-        sha: "a9a7163f2a2953cea426fee1216bec914fe2f56a",
+        sha: "4b308adbe48ac81657fd124b90b44f7c3263f771",
         lock: None,
     },
 ];
diff --git a/src/tools/rls b/src/tools/rls
index 7221e38023c41..93b47d14cef57 160000
--- a/src/tools/rls
+++ b/src/tools/rls
@@ -1 +1 @@
-Subproject commit 7221e38023c41ff2532ebbf54a7da296fd488b50
+Subproject commit 93b47d14cef5720bba7cfb4dcb8078fbf1f706c1
diff --git a/src/tools/rustfmt b/src/tools/rustfmt
index a1fd68da464fc..22eb5241c0ee5 160000
--- a/src/tools/rustfmt
+++ b/src/tools/rustfmt
@@ -1 +1 @@
-Subproject commit a1fd68da464fc51585f351c81fc2b867211c197e
+Subproject commit 22eb5241c0ee5bb7eaf95e270a2b1500e82bf767
diff --git a/src/tools/toolstate.toml b/src/tools/toolstate.toml
index 3cc815ef34edd..1700daa0aff14 100644
--- a/src/tools/toolstate.toml
+++ b/src/tools/toolstate.toml
@@ -27,3 +27,10 @@ miri = "Broken"
 
 # ping @Manishearth @llogiq @mcarton @oli-obk
 clippy = "Broken"
+
+# ping @nrc
+rls = "Testing"
+
+# ping @nrc
+rustfmt = "Testing"
+