diff --git a/Cargo.lock b/Cargo.lock index 552b446a1e753..4a54dc87862e5 100644 --- a/Cargo.lock +++ b/Cargo.lock @@ -3341,6 +3341,7 @@ dependencies = [ name = "run_make_support" version = "0.0.0" dependencies = [ + "gimli", "object 0.34.0", "regex", "wasmparser", diff --git a/compiler/rustc_ast/src/ast.rs b/compiler/rustc_ast/src/ast.rs index bddb50568d41b..727c6bc82fef9 100644 --- a/compiler/rustc_ast/src/ast.rs +++ b/compiler/rustc_ast/src/ast.rs @@ -3112,6 +3112,7 @@ pub struct Delegation { /// Path resolution id. pub id: NodeId, pub qself: Option>, + pub rename: Option, pub path: Path, pub body: Option>, } diff --git a/compiler/rustc_ast/src/mut_visit.rs b/compiler/rustc_ast/src/mut_visit.rs index c4e49d7dbea44..7dbfb7c736454 100644 --- a/compiler/rustc_ast/src/mut_visit.rs +++ b/compiler/rustc_ast/src/mut_visit.rs @@ -1149,10 +1149,13 @@ pub fn noop_visit_item_kind(kind: &mut ItemKind, vis: &mut T) { } ItemKind::MacCall(m) => vis.visit_mac_call(m), ItemKind::MacroDef(def) => vis.visit_macro_def(def), - ItemKind::Delegation(box Delegation { id, qself, path, body }) => { + ItemKind::Delegation(box Delegation { id, qself, path, rename, body }) => { vis.visit_id(id); vis.visit_qself(qself); vis.visit_path(path); + if let Some(rename) = rename { + vis.visit_ident(rename); + } if let Some(body) = body { vis.visit_block(body); } @@ -1195,10 +1198,13 @@ pub fn noop_flat_map_assoc_item( visit_opt(ty, |ty| visitor.visit_ty(ty)); } AssocItemKind::MacCall(mac) => visitor.visit_mac_call(mac), - AssocItemKind::Delegation(box Delegation { id, qself, path, body }) => { + AssocItemKind::Delegation(box Delegation { id, qself, path, rename, body }) => { visitor.visit_id(id); visitor.visit_qself(qself); visitor.visit_path(path); + if let Some(rename) = rename { + visitor.visit_ident(rename); + } if let Some(body) = body { visitor.visit_block(body); } diff --git a/compiler/rustc_ast/src/visit.rs b/compiler/rustc_ast/src/visit.rs index 968d10ad4872c..d9740928f8d67 100644 --- a/compiler/rustc_ast/src/visit.rs +++ b/compiler/rustc_ast/src/visit.rs @@ -382,11 +382,12 @@ pub fn walk_item<'a, V: Visitor<'a>>(visitor: &mut V, item: &'a Item) -> V::Resu } ItemKind::MacCall(mac) => try_visit!(visitor.visit_mac_call(mac)), ItemKind::MacroDef(ts) => try_visit!(visitor.visit_mac_def(ts, item.id)), - ItemKind::Delegation(box Delegation { id, qself, path, body }) => { + ItemKind::Delegation(box Delegation { id, qself, path, rename, body }) => { if let Some(qself) = qself { try_visit!(visitor.visit_ty(&qself.ty)); } try_visit!(visitor.visit_path(path, *id)); + visit_opt!(visitor, visit_ident, *rename); visit_opt!(visitor, visit_block, body); } } @@ -782,11 +783,12 @@ pub fn walk_assoc_item<'a, V: Visitor<'a>>( AssocItemKind::MacCall(mac) => { try_visit!(visitor.visit_mac_call(mac)); } - AssocItemKind::Delegation(box Delegation { id, qself, path, body }) => { + AssocItemKind::Delegation(box Delegation { id, qself, path, rename, body }) => { if let Some(qself) = qself { try_visit!(visitor.visit_ty(&qself.ty)); } try_visit!(visitor.visit_path(path, *id)); + visit_opt!(visitor, visit_ident, *rename); visit_opt!(visitor, visit_block, body); } } diff --git a/compiler/rustc_ast_lowering/src/delegation.rs b/compiler/rustc_ast_lowering/src/delegation.rs index f4d5e71badebb..a1e5c275c189c 100644 --- a/compiler/rustc_ast_lowering/src/delegation.rs +++ b/compiler/rustc_ast_lowering/src/delegation.rs @@ -49,7 +49,7 @@ use rustc_errors::ErrorGuaranteed; use rustc_hir as hir; use rustc_hir::def_id::DefId; use rustc_middle::span_bug; -use rustc_middle::ty::ResolverAstLowering; +use rustc_middle::ty::{Asyncness, ResolverAstLowering}; use rustc_span::{symbol::Ident, Span}; use rustc_target::spec::abi; use std::iter; @@ -67,7 +67,7 @@ impl<'hir> LoweringContext<'_, 'hir> { return false; }; if let Some(local_sig_id) = sig_id.as_local() { - self.resolver.has_self.contains(&local_sig_id) + self.resolver.delegation_fn_sigs[&local_sig_id].has_self } else { match self.tcx.def_kind(sig_id) { DefKind::Fn => false, @@ -82,13 +82,14 @@ impl<'hir> LoweringContext<'_, 'hir> { delegation: &Delegation, item_id: NodeId, ) -> DelegationResults<'hir> { - let span = delegation.path.segments.last().unwrap().ident.span; + let span = self.lower_span(delegation.path.segments.last().unwrap().ident.span); let sig_id = self.get_delegation_sig_id(item_id, delegation.id, span); match sig_id { Ok(sig_id) => { - let decl = self.lower_delegation_decl(sig_id, span); - let sig = self.lower_delegation_sig(span, decl); - let body_id = self.lower_delegation_body(sig.decl, delegation); + let (param_count, c_variadic) = self.param_count(sig_id); + let decl = self.lower_delegation_decl(sig_id, param_count, c_variadic, span); + let sig = self.lower_delegation_sig(sig_id, decl, span); + let body_id = self.lower_delegation_body(delegation, param_count, span); let generics = self.lower_delegation_generics(span); DelegationResults { body_id, sig, generics } @@ -123,34 +124,47 @@ impl<'hir> LoweringContext<'_, 'hir> { }) } + // Function parameter count, including C variadic `...` if present. + fn param_count(&self, sig_id: DefId) -> (usize, bool /*c_variadic*/) { + if let Some(local_sig_id) = sig_id.as_local() { + // Map may be filled incorrectly due to recursive delegation. + // Error will be emmited later during HIR ty lowering. + match self.resolver.delegation_fn_sigs.get(&local_sig_id) { + Some(sig) => (sig.param_count, sig.c_variadic), + None => (0, false), + } + } else { + let sig = self.tcx.fn_sig(sig_id).skip_binder().skip_binder(); + (sig.inputs().len() + usize::from(sig.c_variadic), sig.c_variadic) + } + } + fn lower_delegation_decl( &mut self, sig_id: DefId, - param_span: Span, + param_count: usize, + c_variadic: bool, + span: Span, ) -> &'hir hir::FnDecl<'hir> { - let args_count = if let Some(local_sig_id) = sig_id.as_local() { - // Map may be filled incorrectly due to recursive delegation. - // Error will be emitted later during HIR ty lowering. - self.resolver.fn_parameter_counts.get(&local_sig_id).cloned().unwrap_or_default() - } else { - self.tcx.fn_arg_names(sig_id).len() - }; - let inputs = self.arena.alloc_from_iter((0..args_count).map(|arg| hir::Ty { + // The last parameter in C variadic functions is skipped in the signature, + // like during regular lowering. + let decl_param_count = param_count - c_variadic as usize; + let inputs = self.arena.alloc_from_iter((0..decl_param_count).map(|arg| hir::Ty { hir_id: self.next_id(), kind: hir::TyKind::InferDelegation(sig_id, hir::InferDelegationKind::Input(arg)), - span: self.lower_span(param_span), + span, })); let output = self.arena.alloc(hir::Ty { hir_id: self.next_id(), kind: hir::TyKind::InferDelegation(sig_id, hir::InferDelegationKind::Output), - span: self.lower_span(param_span), + span, }); self.arena.alloc(hir::FnDecl { inputs, output: hir::FnRetTy::Return(output), - c_variadic: false, + c_variadic, lifetime_elision_allowed: true, implicit_self: hir::ImplicitSelfKind::None, }) @@ -158,35 +172,45 @@ impl<'hir> LoweringContext<'_, 'hir> { fn lower_delegation_sig( &mut self, - span: Span, + sig_id: DefId, decl: &'hir hir::FnDecl<'hir>, + span: Span, ) -> hir::FnSig<'hir> { - hir::FnSig { - decl, - header: hir::FnHeader { - unsafety: hir::Unsafety::Normal, - constness: hir::Constness::NotConst, - asyncness: hir::IsAsync::NotAsync, - abi: abi::Abi::Rust, - }, - span: self.lower_span(span), - } + let header = if let Some(local_sig_id) = sig_id.as_local() { + match self.resolver.delegation_fn_sigs.get(&local_sig_id) { + Some(sig) => self.lower_fn_header(sig.header), + None => self.generate_header_error(), + } + } else { + let sig = self.tcx.fn_sig(sig_id).skip_binder().skip_binder(); + let asyncness = match self.tcx.asyncness(sig_id) { + Asyncness::Yes => hir::IsAsync::Async(span), + Asyncness::No => hir::IsAsync::NotAsync, + }; + hir::FnHeader { + unsafety: sig.unsafety, + constness: self.tcx.constness(sig_id), + asyncness, + abi: sig.abi, + } + }; + hir::FnSig { decl, header, span } } - fn generate_param(&mut self, ty: &'hir hir::Ty<'hir>) -> (hir::Param<'hir>, NodeId) { + fn generate_param(&mut self, span: Span) -> (hir::Param<'hir>, NodeId) { let pat_node_id = self.next_node_id(); let pat_id = self.lower_node_id(pat_node_id); let pat = self.arena.alloc(hir::Pat { hir_id: pat_id, kind: hir::PatKind::Binding(hir::BindingMode::NONE, pat_id, Ident::empty(), None), - span: ty.span, + span, default_binding_modes: false, }); - (hir::Param { hir_id: self.next_id(), pat, ty_span: ty.span, span: ty.span }, pat_node_id) + (hir::Param { hir_id: self.next_id(), pat, ty_span: span, span }, pat_node_id) } - fn generate_arg(&mut self, ty: &'hir hir::Ty<'hir>, param_id: HirId) -> hir::Expr<'hir> { + fn generate_arg(&mut self, param_id: HirId, span: Span) -> hir::Expr<'hir> { let segments = self.arena.alloc_from_iter(iter::once(hir::PathSegment { ident: Ident::empty(), hir_id: self.next_id(), @@ -195,20 +219,20 @@ impl<'hir> LoweringContext<'_, 'hir> { infer_args: false, })); - let path = - self.arena.alloc(hir::Path { span: ty.span, res: Res::Local(param_id), segments }); + let path = self.arena.alloc(hir::Path { span, res: Res::Local(param_id), segments }); hir::Expr { hir_id: self.next_id(), kind: hir::ExprKind::Path(hir::QPath::Resolved(None, path)), - span: ty.span, + span, } } fn lower_delegation_body( &mut self, - decl: &'hir hir::FnDecl<'hir>, delegation: &Delegation, + param_count: usize, + span: Span, ) -> BodyId { let path = self.lower_qpath( delegation.id, @@ -224,8 +248,8 @@ impl<'hir> LoweringContext<'_, 'hir> { let mut parameters: Vec> = Vec::new(); let mut args: Vec> = Vec::new(); - for (idx, param_ty) in decl.inputs.iter().enumerate() { - let (param, pat_node_id) = this.generate_param(param_ty); + for idx in 0..param_count { + let (param, pat_node_id) = this.generate_param(span); parameters.push(param); let arg = if let Some(block) = block @@ -245,7 +269,7 @@ impl<'hir> LoweringContext<'_, 'hir> { } } else { let pat_hir_id = this.lower_node_id(pat_node_id); - this.generate_arg(param_ty, pat_hir_id) + this.generate_arg(pat_hir_id, span) }; args.push(arg); } @@ -304,7 +328,9 @@ impl<'hir> LoweringContext<'_, 'hir> { implicit_self: hir::ImplicitSelfKind::None, }); - let sig = self.lower_delegation_sig(span, decl); + let header = self.generate_header_error(); + let sig = hir::FnSig { decl, header, span }; + let body_id = self.lower_body(|this| { let expr = hir::Expr { hir_id: this.next_id(), kind: hir::ExprKind::Err(err), span: span }; @@ -312,6 +338,15 @@ impl<'hir> LoweringContext<'_, 'hir> { }); DelegationResults { generics, body_id, sig } } + + fn generate_header_error(&self) -> hir::FnHeader { + hir::FnHeader { + unsafety: hir::Unsafety::Normal, + constness: hir::Constness::NotConst, + asyncness: hir::IsAsync::NotAsync, + abi: abi::Abi::Rust, + } + } } struct SelfResolver<'a> { diff --git a/compiler/rustc_ast_lowering/src/item.rs b/compiler/rustc_ast_lowering/src/item.rs index e4c633aa324a8..1a1c50018ac52 100644 --- a/compiler/rustc_ast_lowering/src/item.rs +++ b/compiler/rustc_ast_lowering/src/item.rs @@ -1344,7 +1344,7 @@ impl<'hir> LoweringContext<'_, 'hir> { (generics, hir::FnSig { header, decl, span: self.lower_span(sig.span) }) } - fn lower_fn_header(&mut self, h: FnHeader) -> hir::FnHeader { + pub(super) fn lower_fn_header(&mut self, h: FnHeader) -> hir::FnHeader { let asyncness = if let Some(CoroutineKind::Async { span, .. }) = h.coroutine_kind { hir::IsAsync::Async(span) } else { diff --git a/compiler/rustc_borrowck/src/diagnostics/conflict_errors.rs b/compiler/rustc_borrowck/src/diagnostics/conflict_errors.rs index 4878da530b0f5..93ea8fb6979a6 100644 --- a/compiler/rustc_borrowck/src/diagnostics/conflict_errors.rs +++ b/compiler/rustc_borrowck/src/diagnostics/conflict_errors.rs @@ -347,7 +347,7 @@ impl<'cx, 'tcx> MirBorrowckCtxt<'cx, 'tcx> { mpi: MovePathIndex, err: &mut Diag<'tcx>, in_pattern: &mut bool, - move_spans: UseSpans<'_>, + move_spans: UseSpans<'tcx>, ) { let move_span = match move_spans { UseSpans::ClosureUse { capture_kind_span, .. } => capture_kind_span, @@ -491,11 +491,11 @@ impl<'cx, 'tcx> MirBorrowckCtxt<'cx, 'tcx> { .. } = move_spans { - self.suggest_cloning(err, ty, expr, None); + self.suggest_cloning(err, ty, expr, None, Some(move_spans)); } else if self.suggest_hoisting_call_outside_loop(err, expr) { // The place where the the type moves would be misleading to suggest clone. // #121466 - self.suggest_cloning(err, ty, expr, None); + self.suggest_cloning(err, ty, expr, None, Some(move_spans)); } } if let Some(pat) = finder.pat { @@ -1085,6 +1085,7 @@ impl<'cx, 'tcx> MirBorrowckCtxt<'cx, 'tcx> { ty: Ty<'tcx>, mut expr: &'cx hir::Expr<'cx>, mut other_expr: Option<&'cx hir::Expr<'cx>>, + use_spans: Option>, ) { if let hir::ExprKind::Struct(_, _, Some(_)) = expr.kind { // We have `S { foo: val, ..base }`. In `check_aggregate_rvalue` we have a single @@ -1197,14 +1198,50 @@ impl<'cx, 'tcx> MirBorrowckCtxt<'cx, 'tcx> { .all(|field| self.implements_clone(field.ty(self.infcx.tcx, args))) }) { + let ty_span = self.infcx.tcx.def_span(def.did()); + let mut span: MultiSpan = ty_span.into(); + span.push_span_label(ty_span, "consider implementing `Clone` for this type"); + span.push_span_label(expr.span, "you could clone this value"); err.span_note( - self.infcx.tcx.def_span(def.did()), + span, + format!("if `{ty}` implemented `Clone`, you could clone the value"), + ); + } else if let ty::Param(param) = ty.kind() + && let Some(_clone_trait_def) = self.infcx.tcx.lang_items().clone_trait() + && let generics = self.infcx.tcx.generics_of(self.mir_def_id()) + && let generic_param = generics.type_param(*param, self.infcx.tcx) + && let param_span = self.infcx.tcx.def_span(generic_param.def_id) + && if let Some(UseSpans::FnSelfUse { kind, .. }) = use_spans + && let CallKind::FnCall { fn_trait_id, self_ty } = kind + && let ty::Param(_) = self_ty.kind() + && ty == self_ty + && [ + self.infcx.tcx.lang_items().fn_once_trait(), + self.infcx.tcx.lang_items().fn_mut_trait(), + self.infcx.tcx.lang_items().fn_trait(), + ] + .contains(&Some(fn_trait_id)) + { + // Do not suggest `F: FnOnce() + Clone`. + false + } else { + true + } + { + let mut span: MultiSpan = param_span.into(); + span.push_span_label( + param_span, + "consider constraining this type parameter with `Clone`", + ); + span.push_span_label(expr.span, "you could clone this value"); + err.span_help( + span, format!("if `{ty}` implemented `Clone`, you could clone the value"), ); } } - fn implements_clone(&self, ty: Ty<'tcx>) -> bool { + pub(crate) fn implements_clone(&self, ty: Ty<'tcx>) -> bool { let Some(clone_trait_def) = self.infcx.tcx.lang_items().clone_trait() else { return false }; self.infcx .type_implements_trait(clone_trait_def, [ty], self.param_env) @@ -1403,7 +1440,7 @@ impl<'cx, 'tcx> MirBorrowckCtxt<'cx, 'tcx> { if let Some(expr) = self.find_expr(borrow_span) && let Some(ty) = typeck_results.node_type_opt(expr.hir_id) { - self.suggest_cloning(&mut err, ty, expr, self.find_expr(span)); + self.suggest_cloning(&mut err, ty, expr, self.find_expr(span), Some(move_spans)); } self.buffer_error(err); } @@ -1964,7 +2001,7 @@ impl<'cx, 'tcx> MirBorrowckCtxt<'cx, 'tcx> { pub(crate) fn find_expr(&self, span: Span) -> Option<&hir::Expr<'_>> { let tcx = self.infcx.tcx; let body_id = tcx.hir_node(self.mir_hir_id()).body_id()?; - let mut expr_finder = FindExprBySpan::new(span); + let mut expr_finder = FindExprBySpan::new(span, tcx); expr_finder.visit_expr(tcx.hir().body(body_id).value); expr_finder.result } @@ -1998,14 +2035,14 @@ impl<'cx, 'tcx> MirBorrowckCtxt<'cx, 'tcx> { }; let mut expr_finder = - FindExprBySpan::new(self.body.local_decls[*index1].source_info.span); + FindExprBySpan::new(self.body.local_decls[*index1].source_info.span, tcx); expr_finder.visit_expr(hir.body(body_id).value); let Some(index1) = expr_finder.result else { note_default_suggestion(); return; }; - expr_finder = FindExprBySpan::new(self.body.local_decls[*index2].source_info.span); + expr_finder = FindExprBySpan::new(self.body.local_decls[*index2].source_info.span, tcx); expr_finder.visit_expr(hir.body(body_id).value); let Some(index2) = expr_finder.result else { note_default_suggestion(); diff --git a/compiler/rustc_borrowck/src/diagnostics/explain_borrow.rs b/compiler/rustc_borrowck/src/diagnostics/explain_borrow.rs index 418eabe3ae242..5ebdb69050b24 100644 --- a/compiler/rustc_borrowck/src/diagnostics/explain_borrow.rs +++ b/compiler/rustc_borrowck/src/diagnostics/explain_borrow.rs @@ -76,7 +76,7 @@ impl<'tcx> BorrowExplanation<'tcx> { && let Some(body_id) = node.body_id() { let body = tcx.hir().body(body_id); - let mut expr_finder = FindExprBySpan::new(span); + let mut expr_finder = FindExprBySpan::new(span, tcx); expr_finder.visit_expr(body.value); if let Some(mut expr) = expr_finder.result { while let hir::ExprKind::AddrOf(_, _, inner) diff --git a/compiler/rustc_borrowck/src/diagnostics/move_errors.rs b/compiler/rustc_borrowck/src/diagnostics/move_errors.rs index bc02c5be93d61..288b846daf56e 100644 --- a/compiler/rustc_borrowck/src/diagnostics/move_errors.rs +++ b/compiler/rustc_borrowck/src/diagnostics/move_errors.rs @@ -2,10 +2,13 @@ #![allow(rustc::untranslatable_diagnostic)] use rustc_errors::{Applicability, Diag}; +use rustc_hir::intravisit::Visitor; +use rustc_hir::{CaptureBy, ExprKind, HirId, Node}; use rustc_middle::mir::*; use rustc_middle::ty::{self, Ty}; use rustc_mir_dataflow::move_paths::{LookupResult, MovePathIndex}; use rustc_span::{BytePos, ExpnKind, MacroKind, Span}; +use rustc_trait_selection::traits::error_reporting::FindExprBySpan; use crate::diagnostics::CapturedMessageOpt; use crate::diagnostics::{DescribePlaceOpt, UseSpans}; @@ -303,6 +306,121 @@ impl<'a, 'tcx> MirBorrowckCtxt<'a, 'tcx> { self.cannot_move_out_of(span, &description) } + fn suggest_clone_of_captured_var_in_move_closure( + &self, + err: &mut Diag<'_>, + upvar_hir_id: HirId, + upvar_name: &str, + use_spans: Option>, + ) { + let tcx = self.infcx.tcx; + let typeck_results = tcx.typeck(self.mir_def_id()); + let Some(use_spans) = use_spans else { return }; + // We only care about the case where a closure captured a binding. + let UseSpans::ClosureUse { args_span, .. } = use_spans else { return }; + let Some(body_id) = tcx.hir_node(self.mir_hir_id()).body_id() else { return }; + // Fetch the type of the expression corresponding to the closure-captured binding. + let Some(captured_ty) = typeck_results.node_type_opt(upvar_hir_id) else { return }; + if !self.implements_clone(captured_ty) { + // We only suggest cloning the captured binding if the type can actually be cloned. + return; + }; + // Find the closure that captured the binding. + let mut expr_finder = FindExprBySpan::new(args_span, tcx); + expr_finder.include_closures = true; + expr_finder.visit_expr(tcx.hir().body(body_id).value); + let Some(closure_expr) = expr_finder.result else { return }; + let ExprKind::Closure(closure) = closure_expr.kind else { return }; + // We'll only suggest cloning the binding if it's a `move` closure. + let CaptureBy::Value { .. } = closure.capture_clause else { return }; + // Find the expression within the closure where the binding is consumed. + let mut suggested = false; + let use_span = use_spans.var_or_use(); + let mut expr_finder = FindExprBySpan::new(use_span, tcx); + expr_finder.include_closures = true; + expr_finder.visit_expr(tcx.hir().body(body_id).value); + let Some(use_expr) = expr_finder.result else { return }; + let parent = tcx.parent_hir_node(use_expr.hir_id); + if let Node::Expr(expr) = parent + && let ExprKind::Assign(lhs, ..) = expr.kind + && lhs.hir_id == use_expr.hir_id + { + // Cloning the value being assigned makes no sense: + // + // error[E0507]: cannot move out of `var`, a captured variable in an `FnMut` closure + // --> $DIR/option-content-move2.rs:11:9 + // | + // LL | let mut var = None; + // | ------- captured outer variable + // LL | func(|| { + // | -- captured by this `FnMut` closure + // LL | // Shouldn't suggest `move ||.as_ref()` here + // LL | move || { + // | ^^^^^^^ `var` is moved here + // LL | + // LL | var = Some(NotCopyable); + // | --- + // | | + // | variable moved due to use in closure + // | move occurs because `var` has type `Option`, which does not implement the `Copy` trait + // | + return; + } + + // Search for an appropriate place for the structured `.clone()` suggestion to be applied. + // If we encounter a statement before the borrow error, we insert a statement there. + for (_, node) in tcx.hir().parent_iter(closure_expr.hir_id) { + if let Node::Stmt(stmt) = node { + let padding = tcx + .sess + .source_map() + .indentation_before(stmt.span) + .unwrap_or_else(|| " ".to_string()); + err.multipart_suggestion_verbose( + "clone the value before moving it into the closure", + vec![ + ( + stmt.span.shrink_to_lo(), + format!("let value = {upvar_name}.clone();\n{padding}"), + ), + (use_span, "value".to_string()), + ], + Applicability::MachineApplicable, + ); + suggested = true; + break; + } else if let Node::Expr(expr) = node + && let ExprKind::Closure(_) = expr.kind + { + // We want to suggest cloning only on the first closure, not + // subsequent ones (like `ui/suggestions/option-content-move2.rs`). + break; + } + } + if !suggested { + // If we couldn't find a statement for us to insert a new `.clone()` statement before, + // we have a bare expression, so we suggest the creation of a new block inline to go + // from `move || val` to `{ let value = val.clone(); move || value }`. + let padding = tcx + .sess + .source_map() + .indentation_before(closure_expr.span) + .unwrap_or_else(|| " ".to_string()); + err.multipart_suggestion_verbose( + "clone the value before moving it into the closure", + vec![ + ( + closure_expr.span.shrink_to_lo(), + format!("{{\n{padding}let value = {upvar_name}.clone();\n{padding}"), + ), + (use_spans.var_or_use(), "value".to_string()), + (closure_expr.span.shrink_to_hi(), format!("\n{padding}}}")), + ], + Applicability::MachineApplicable, + ); + } + } + fn report_cannot_move_from_borrowed_content( &mut self, move_place: Place<'tcx>, @@ -310,10 +428,11 @@ impl<'a, 'tcx> MirBorrowckCtxt<'a, 'tcx> { span: Span, use_spans: Option>, ) -> Diag<'tcx> { + let tcx = self.infcx.tcx; // Inspect the type of the content behind the // borrow to provide feedback about why this // was a move rather than a copy. - let ty = deref_target_place.ty(self.body, self.infcx.tcx).ty; + let ty = deref_target_place.ty(self.body, tcx).ty; let upvar_field = self .prefixes(move_place.as_ref(), PrefixSet::All) .find_map(|p| self.is_upvar_field_projection(p)); @@ -363,8 +482,8 @@ impl<'a, 'tcx> MirBorrowckCtxt<'a, 'tcx> { let upvar = &self.upvars[upvar_field.unwrap().index()]; let upvar_hir_id = upvar.get_root_variable(); - let upvar_name = upvar.to_string(self.infcx.tcx); - let upvar_span = self.infcx.tcx.hir().span(upvar_hir_id); + let upvar_name = upvar.to_string(tcx); + let upvar_span = tcx.hir().span(upvar_hir_id); let place_name = self.describe_any_place(move_place.as_ref()); @@ -380,12 +499,21 @@ impl<'a, 'tcx> MirBorrowckCtxt<'a, 'tcx> { closure_kind_ty, closure_kind, place_description, ); - self.cannot_move_out_of(span, &place_description) + let closure_span = tcx.def_span(def_id); + let mut err = self + .cannot_move_out_of(span, &place_description) .with_span_label(upvar_span, "captured outer variable") .with_span_label( - self.infcx.tcx.def_span(def_id), + closure_span, format!("captured by this `{closure_kind}` closure"), - ) + ); + self.suggest_clone_of_captured_var_in_move_closure( + &mut err, + upvar_hir_id, + &upvar_name, + use_spans, + ); + err } _ => { let source = self.borrowed_content_source(deref_base); @@ -415,7 +543,7 @@ impl<'a, 'tcx> MirBorrowckCtxt<'a, 'tcx> { ), (_, _, _) => self.cannot_move_out_of( span, - &source.describe_for_unnamed_place(self.infcx.tcx), + &source.describe_for_unnamed_place(tcx), ), } } @@ -447,7 +575,7 @@ impl<'a, 'tcx> MirBorrowckCtxt<'a, 'tcx> { }; if let Some(expr) = self.find_expr(span) { - self.suggest_cloning(err, place_ty, expr, self.find_expr(other_span)); + self.suggest_cloning(err, place_ty, expr, self.find_expr(other_span), None); } err.subdiagnostic( @@ -482,7 +610,13 @@ impl<'a, 'tcx> MirBorrowckCtxt<'a, 'tcx> { }; if let Some(expr) = self.find_expr(use_span) { - self.suggest_cloning(err, place_ty, expr, self.find_expr(span)); + self.suggest_cloning( + err, + place_ty, + expr, + self.find_expr(span), + Some(use_spans), + ); } err.subdiagnostic( @@ -595,7 +729,7 @@ impl<'a, 'tcx> MirBorrowckCtxt<'a, 'tcx> { let place_desc = &format!("`{}`", self.local_names[*local].unwrap()); if let Some(expr) = self.find_expr(binding_span) { - self.suggest_cloning(err, bind_to.ty, expr, None); + self.suggest_cloning(err, bind_to.ty, expr, None, None); } err.subdiagnostic( diff --git a/compiler/rustc_hir_analysis/src/hir_ty_lowering/mod.rs b/compiler/rustc_hir_analysis/src/hir_ty_lowering/mod.rs index 4a0df6cf7b86f..63da27246a2af 100644 --- a/compiler/rustc_hir_analysis/src/hir_ty_lowering/mod.rs +++ b/compiler/rustc_hir_analysis/src/hir_ty_lowering/mod.rs @@ -1964,11 +1964,6 @@ impl<'tcx> dyn HirTyLowerer<'tcx> + '_ { try_emit("recursive delegation"); } - let sig = self.tcx().fn_sig(sig_id).instantiate_identity(); - if sig.output().has_opaque_types() { - try_emit("delegation to a function with opaque type"); - } - let sig_generics = self.tcx().generics_of(sig_id); let parent = self.tcx().parent(self.item_def_id()); let parent_generics = self.tcx().generics_of(parent); @@ -1991,29 +1986,6 @@ impl<'tcx> dyn HirTyLowerer<'tcx> + '_ { try_emit("delegation to a trait method from a free function"); } - if self.tcx().asyncness(sig_id) == ty::Asyncness::Yes { - try_emit("delegation to async functions"); - } - - if self.tcx().constness(sig_id) == hir::Constness::Const { - try_emit("delegation to const functions"); - } - - if sig.c_variadic() { - try_emit("delegation to variadic functions"); - // variadic functions are also `unsafe` and `extern "C"`. - // Do not emit same error multiple times. - return error_occured; - } - - if let hir::Unsafety::Unsafe = sig.unsafety() { - try_emit("delegation to unsafe functions"); - } - - if abi::Abi::Rust != sig.abi() { - try_emit("delegation to non Rust ABI functions"); - } - error_occured } diff --git a/compiler/rustc_middle/src/ty/mod.rs b/compiler/rustc_middle/src/ty/mod.rs index cc026e349d74e..cda332aee5647 100644 --- a/compiler/rustc_middle/src/ty/mod.rs +++ b/compiler/rustc_middle/src/ty/mod.rs @@ -45,7 +45,7 @@ use rustc_data_structures::unord::UnordMap; use rustc_errors::{Diag, ErrorGuaranteed, StashKey}; use rustc_hir as hir; use rustc_hir::def::{CtorKind, CtorOf, DefKind, DocLinkResMap, LifetimeRes, Res}; -use rustc_hir::def_id::{CrateNum, DefId, DefIdMap, LocalDefId, LocalDefIdMap, LocalDefIdSet}; +use rustc_hir::def_id::{CrateNum, DefId, DefIdMap, LocalDefId, LocalDefIdMap}; use rustc_index::IndexVec; use rustc_macros::HashStable; use rustc_query_system::ich::StableHashingContext; @@ -224,8 +224,15 @@ pub struct ResolverAstLowering { pub lint_buffer: Steal, /// Information about functions signatures for delegation items expansion - pub has_self: LocalDefIdSet, - pub fn_parameter_counts: LocalDefIdMap, + pub delegation_fn_sigs: LocalDefIdMap, +} + +#[derive(Debug)] +pub struct DelegationFnSig { + pub header: ast::FnHeader, + pub param_count: usize, + pub has_self: bool, + pub c_variadic: bool, } #[derive(Clone, Copy, Debug)] diff --git a/compiler/rustc_parse/src/parser/item.rs b/compiler/rustc_parse/src/parser/item.rs index 84ecd0a0de54f..ed51710564a42 100644 --- a/compiler/rustc_parse/src/parser/item.rs +++ b/compiler/rustc_parse/src/parser/item.rs @@ -686,6 +686,8 @@ impl<'a> Parser<'a> { (None, self.parse_path(PathStyle::Expr)?) }; + let rename = if self.eat_keyword(kw::As) { Some(self.parse_ident()?) } else { None }; + let body = if self.check(&token::OpenDelim(Delimiter::Brace)) { Some(self.parse_block()?) } else { @@ -695,11 +697,9 @@ impl<'a> Parser<'a> { let span = span.to(self.prev_token.span); self.psess.gated_spans.gate(sym::fn_delegation, span); - let ident = path.segments.last().map(|seg| seg.ident).unwrap_or(Ident::empty()); - Ok(( - ident, - ItemKind::Delegation(Box::new(Delegation { id: DUMMY_NODE_ID, qself, path, body })), - )) + let ident = rename.unwrap_or_else(|| path.segments.last().unwrap().ident); + let deleg = Delegation { id: DUMMY_NODE_ID, qself, path, rename, body }; + Ok((ident, ItemKind::Delegation(Box::new(deleg)))) } fn parse_item_list( diff --git a/compiler/rustc_resolve/src/late.rs b/compiler/rustc_resolve/src/late.rs index c877ae5e21f48..292af43b602e0 100644 --- a/compiler/rustc_resolve/src/late.rs +++ b/compiler/rustc_resolve/src/late.rs @@ -21,6 +21,7 @@ use rustc_hir::def::{self, CtorKind, DefKind, LifetimeRes, NonMacroAttrKind, Par use rustc_hir::def_id::{DefId, LocalDefId, CRATE_DEF_ID, LOCAL_CRATE}; use rustc_hir::{MissingLifetimeKind, PrimTy, TraitCandidate}; use rustc_middle::middle::resolve_bound_vars::Set1; +use rustc_middle::ty::DelegationFnSig; use rustc_middle::{bug, span_bug}; use rustc_session::config::{CrateType, ResolveDocLinks}; use rustc_session::lint; @@ -4749,12 +4750,13 @@ struct ItemInfoCollector<'a, 'b, 'tcx> { impl ItemInfoCollector<'_, '_, '_> { fn collect_fn_info(&mut self, sig: &FnSig, id: NodeId) { - let def_id = self.r.local_def_id(id); - self.r.fn_parameter_counts.insert(def_id, sig.decl.inputs.len()); - - if sig.decl.has_self() { - self.r.has_self.insert(def_id); - } + let sig = DelegationFnSig { + header: sig.header, + param_count: sig.decl.inputs.len(), + has_self: sig.decl.has_self(), + c_variadic: sig.decl.c_variadic(), + }; + self.r.delegation_fn_sigs.insert(self.r.local_def_id(id), sig); } } diff --git a/compiler/rustc_resolve/src/late/diagnostics.rs b/compiler/rustc_resolve/src/late/diagnostics.rs index d79c638fa0789..64451030adf0f 100644 --- a/compiler/rustc_resolve/src/late/diagnostics.rs +++ b/compiler/rustc_resolve/src/late/diagnostics.rs @@ -2039,7 +2039,8 @@ impl<'a: 'ast, 'ast, 'tcx> LateResolutionVisitor<'a, '_, 'ast, 'tcx> { ast::AssocItemKind::Fn(..) => AssocSuggestion::AssocFn { called }, ast::AssocItemKind::Type(..) => AssocSuggestion::AssocType, ast::AssocItemKind::Delegation(..) - if self.r.has_self.contains(&self.r.local_def_id(assoc_item.id)) => + if self.r.delegation_fn_sigs[&self.r.local_def_id(assoc_item.id)] + .has_self => { AssocSuggestion::MethodWithSelf { called } } @@ -2062,7 +2063,9 @@ impl<'a: 'ast, 'ast, 'tcx> LateResolutionVisitor<'a, '_, 'ast, 'tcx> { if filter_fn(res) { let def_id = res.def_id(); let has_self = match def_id.as_local() { - Some(def_id) => self.r.has_self.contains(&def_id), + Some(def_id) => { + self.r.delegation_fn_sigs.get(&def_id).map_or(false, |sig| sig.has_self) + } None => self .r .tcx diff --git a/compiler/rustc_resolve/src/lib.rs b/compiler/rustc_resolve/src/lib.rs index b5b6d899cc58e..e07c3247d07ae 100644 --- a/compiler/rustc_resolve/src/lib.rs +++ b/compiler/rustc_resolve/src/lib.rs @@ -43,7 +43,7 @@ use rustc_feature::BUILTIN_ATTRIBUTES; use rustc_hir::def::Namespace::{self, *}; use rustc_hir::def::NonMacroAttrKind; use rustc_hir::def::{self, CtorOf, DefKind, DocLinkResMap, LifetimeRes, PartialRes, PerNS}; -use rustc_hir::def_id::{CrateNum, DefId, LocalDefId, LocalDefIdMap, LocalDefIdSet}; +use rustc_hir::def_id::{CrateNum, DefId, LocalDefId, LocalDefIdMap}; use rustc_hir::def_id::{CRATE_DEF_ID, LOCAL_CRATE}; use rustc_hir::{PrimTy, TraitCandidate}; use rustc_index::IndexVec; @@ -52,8 +52,8 @@ use rustc_middle::metadata::ModChild; use rustc_middle::middle::privacy::EffectiveVisibilities; use rustc_middle::query::Providers; use rustc_middle::span_bug; -use rustc_middle::ty::{self, MainDefinition, RegisteredTools, TyCtxt, TyCtxtFeed}; -use rustc_middle::ty::{Feed, ResolverGlobalCtxt, ResolverOutputs}; +use rustc_middle::ty::{self, DelegationFnSig, Feed, MainDefinition, RegisteredTools}; +use rustc_middle::ty::{ResolverGlobalCtxt, ResolverOutputs, TyCtxt, TyCtxtFeed}; use rustc_query_system::ich::StableHashingContext; use rustc_session::lint::builtin::PRIVATE_MACRO_USE; use rustc_session::lint::LintBuffer; @@ -992,7 +992,6 @@ pub struct Resolver<'a, 'tcx> { extern_prelude: FxHashMap>, /// N.B., this is used only for better diagnostics, not name resolution itself. - has_self: LocalDefIdSet, field_def_ids: LocalDefIdMap<&'tcx [DefId]>, /// Span of the privacy modifier in fields of an item `DefId` accessible with dot syntax. @@ -1149,8 +1148,7 @@ pub struct Resolver<'a, 'tcx> { legacy_const_generic_args: FxHashMap>>, /// Amount of lifetime parameters for each item in the crate. item_generics_num_lifetimes: FxHashMap, - /// Amount of parameters for each function in the crate. - fn_parameter_counts: LocalDefIdMap, + delegation_fn_sigs: LocalDefIdMap, main_def: Option, trait_impls: FxIndexMap>, @@ -1399,7 +1397,6 @@ impl<'a, 'tcx> Resolver<'a, 'tcx> { prelude: None, extern_prelude, - has_self: Default::default(), field_def_ids: Default::default(), field_visibility_spans: FxHashMap::default(), @@ -1508,7 +1505,7 @@ impl<'a, 'tcx> Resolver<'a, 'tcx> { doc_link_resolutions: Default::default(), doc_link_traits_in_scope: Default::default(), all_macro_rules: Default::default(), - fn_parameter_counts: Default::default(), + delegation_fn_sigs: Default::default(), }; let root_parent_scope = ParentScope::module(graph_root, &resolver); @@ -1621,8 +1618,7 @@ impl<'a, 'tcx> Resolver<'a, 'tcx> { trait_map: self.trait_map, lifetime_elision_allowed: self.lifetime_elision_allowed, lint_buffer: Steal::new(self.lint_buffer), - has_self: self.has_self, - fn_parameter_counts: self.fn_parameter_counts, + delegation_fn_sigs: self.delegation_fn_sigs, }; ResolverOutputs { global_ctxt, ast_lowering } } diff --git a/compiler/rustc_span/src/symbol.rs b/compiler/rustc_span/src/symbol.rs index 8abf42e2c1392..99591b5e1440b 100644 --- a/compiler/rustc_span/src/symbol.rs +++ b/compiler/rustc_span/src/symbol.rs @@ -192,6 +192,7 @@ symbols! { Duration, Encodable, Encoder, + Enumerate, Eq, Equal, Err, diff --git a/compiler/rustc_trait_selection/src/traits/error_reporting/mod.rs b/compiler/rustc_trait_selection/src/traits/error_reporting/mod.rs index 837b784f2725a..e50edfdc656ce 100644 --- a/compiler/rustc_trait_selection/src/traits/error_reporting/mod.rs +++ b/compiler/rustc_trait_selection/src/traits/error_reporting/mod.rs @@ -50,22 +50,38 @@ pub struct FindExprBySpan<'hir> { pub span: Span, pub result: Option<&'hir hir::Expr<'hir>>, pub ty_result: Option<&'hir hir::Ty<'hir>>, + pub include_closures: bool, + pub tcx: TyCtxt<'hir>, } impl<'hir> FindExprBySpan<'hir> { - pub fn new(span: Span) -> Self { - Self { span, result: None, ty_result: None } + pub fn new(span: Span, tcx: TyCtxt<'hir>) -> Self { + Self { span, result: None, ty_result: None, tcx, include_closures: false } } } impl<'v> Visitor<'v> for FindExprBySpan<'v> { + type NestedFilter = rustc_middle::hir::nested_filter::OnlyBodies; + + fn nested_visit_map(&mut self) -> Self::Map { + self.tcx.hir() + } + fn visit_expr(&mut self, ex: &'v hir::Expr<'v>) { if self.span == ex.span { self.result = Some(ex); } else { + if let hir::ExprKind::Closure(..) = ex.kind + && self.include_closures + && let closure_header_sp = self.span.with_hi(ex.span.hi()) + && closure_header_sp == ex.span + { + self.result = Some(ex); + } hir::intravisit::walk_expr(self, ex); } } + fn visit_ty(&mut self, ty: &'v hir::Ty<'v>) { if self.span == ty.span { self.ty_result = Some(ty); diff --git a/compiler/rustc_trait_selection/src/traits/error_reporting/suggestions.rs b/compiler/rustc_trait_selection/src/traits/error_reporting/suggestions.rs index 9d3caaa01abd7..cc879c42ce95b 100644 --- a/compiler/rustc_trait_selection/src/traits/error_reporting/suggestions.rs +++ b/compiler/rustc_trait_selection/src/traits/error_reporting/suggestions.rs @@ -901,7 +901,7 @@ impl<'tcx> TypeErrCtxt<'_, 'tcx> { // Remove all the desugaring and macro contexts. span.remove_mark(); } - let mut expr_finder = FindExprBySpan::new(span); + let mut expr_finder = FindExprBySpan::new(span, self.tcx); let Some(body_id) = self.tcx.hir().maybe_body_owned_by(obligation.cause.body_id) else { return; }; @@ -1367,7 +1367,7 @@ impl<'tcx> TypeErrCtxt<'_, 'tcx> { return false; }; let body = self.tcx.hir().body(body_id); - let mut expr_finder = FindExprBySpan::new(span); + let mut expr_finder = FindExprBySpan::new(span, self.tcx); expr_finder.visit_expr(body.value); let Some(expr) = expr_finder.result else { return false; @@ -1469,7 +1469,7 @@ impl<'tcx> TypeErrCtxt<'_, 'tcx> { // Remove all the hir desugaring contexts while maintaining the macro contexts. span.remove_mark(); } - let mut expr_finder = super::FindExprBySpan::new(span); + let mut expr_finder = super::FindExprBySpan::new(span, self.tcx); let Some(body_id) = self.tcx.hir().maybe_body_owned_by(obligation.cause.body_id) else { return false; }; diff --git a/compiler/rustc_trait_selection/src/traits/error_reporting/type_err_ctxt_ext.rs b/compiler/rustc_trait_selection/src/traits/error_reporting/type_err_ctxt_ext.rs index 0e309689680ad..1971136e54c72 100644 --- a/compiler/rustc_trait_selection/src/traits/error_reporting/type_err_ctxt_ext.rs +++ b/compiler/rustc_trait_selection/src/traits/error_reporting/type_err_ctxt_ext.rs @@ -2457,7 +2457,7 @@ impl<'tcx> TypeErrCtxt<'_, 'tcx> { && let Some(body_id) = self.tcx.hir().maybe_body_owned_by(obligation.cause.body_id) { - let mut expr_finder = FindExprBySpan::new(span); + let mut expr_finder = FindExprBySpan::new(span, self.tcx); expr_finder.visit_expr(self.tcx.hir().body(body_id).value); if let Some(hir::Expr { diff --git a/library/core/src/iter/adapters/enumerate.rs b/library/core/src/iter/adapters/enumerate.rs index ef46040f0a703..7adbabf69e490 100644 --- a/library/core/src/iter/adapters/enumerate.rs +++ b/library/core/src/iter/adapters/enumerate.rs @@ -15,6 +15,7 @@ use crate::ops::Try; #[derive(Clone, Debug)] #[must_use = "iterators are lazy and do nothing unless consumed"] #[stable(feature = "rust1", since = "1.0.0")] +#[cfg_attr(not(test), rustc_diagnostic_item = "Enumerate")] pub struct Enumerate { iter: I, count: usize, diff --git a/library/std/src/sys/pal/windows/mod.rs b/library/std/src/sys/pal/windows/mod.rs index b49585599cb32..ff41f6e77be7a 100644 --- a/library/std/src/sys/pal/windows/mod.rs +++ b/library/std/src/sys/pal/windows/mod.rs @@ -201,14 +201,21 @@ pub fn to_u16s>(s: S) -> crate::io::Result> { // currently reside in the buffer. This function is an abstraction over these // functions by making them easier to call. // -// The first callback, `f1`, is yielded a (pointer, len) pair which can be +// The first callback, `f1`, is passed a (pointer, len) pair which can be // passed to a syscall. The `ptr` is valid for `len` items (u16 in this case). -// The closure is expected to return what the syscall returns which will be -// interpreted by this function to determine if the syscall needs to be invoked -// again (with more buffer space). +// The closure is expected to: +// - On success, return the actual length of the written data *without* the null terminator. +// This can be 0. In this case the last_error must be left unchanged. +// - On insufficient buffer space, +// - either return the required length *with* the null terminator, +// - or set the last-error to ERROR_INSUFFICIENT_BUFFER and return `len`. +// - On other failure, return 0 and set last_error. +// +// This is how most but not all syscalls indicate the required buffer space. +// Other syscalls may need translation to match this protocol. // // Once the syscall has completed (errors bail out early) the second closure is -// yielded the data which has been read from the syscall. The return value +// passed the data which has been read from the syscall. The return value // from this closure is then the return value of the function. pub fn fill_utf16_buf(mut f1: F1, f2: F2) -> crate::io::Result where diff --git a/library/std/src/sys/pal/windows/os.rs b/library/std/src/sys/pal/windows/os.rs index 374c9845ea4bb..64d8b72aed282 100644 --- a/library/std/src/sys/pal/windows/os.rs +++ b/library/std/src/sys/pal/windows/os.rs @@ -326,6 +326,8 @@ fn home_dir_crt() -> Option { super::fill_utf16_buf( |buf, mut sz| { + // GetUserProfileDirectoryW does not quite use the usual protocol for + // negotiating the buffer size, so we have to translate. match c::GetUserProfileDirectoryW( ptr::without_provenance_mut(CURRENT_PROCESS_TOKEN), buf, diff --git a/src/tools/compiletest/src/runtest.rs b/src/tools/compiletest/src/runtest.rs index 1dd639a89188b..a16e9c02e2e17 100644 --- a/src/tools/compiletest/src/runtest.rs +++ b/src/tools/compiletest/src/runtest.rs @@ -3824,6 +3824,7 @@ impl<'test> TestCx<'test> { .arg(format!("-Ldependency={}", &support_lib_deps_deps.to_string_lossy())) .arg("--extern") .arg(format!("run_make_support={}", &support_lib_path.to_string_lossy())) + .arg("--edition=2021") .arg(&self.testpaths.file.join("rmake.rs")) .env("TARGET", &self.config.target) .env("PYTHON", &self.config.python) diff --git a/src/tools/run-make-support/Cargo.toml b/src/tools/run-make-support/Cargo.toml index 3ea35c7940c21..c385ef0f96753 100644 --- a/src/tools/run-make-support/Cargo.toml +++ b/src/tools/run-make-support/Cargo.toml @@ -7,3 +7,4 @@ edition = "2021" object = "0.34.0" wasmparser = "0.118.2" regex = "1.8" # 1.8 to avoid memchr 2.6.0, as 2.5.0 is pinned in the workspace +gimli = "0.28.1" diff --git a/src/tools/run-make-support/src/lib.rs b/src/tools/run-make-support/src/lib.rs index e723e824ed6c8..aeb7417fa69c7 100644 --- a/src/tools/run-make-support/src/lib.rs +++ b/src/tools/run-make-support/src/lib.rs @@ -14,6 +14,7 @@ use std::env; use std::path::{Path, PathBuf}; use std::process::{Command, Output}; +pub use gimli; pub use object; pub use regex; pub use wasmparser; diff --git a/src/tools/tidy/src/allowed_run_make_makefiles.txt b/src/tools/tidy/src/allowed_run_make_makefiles.txt index f0ed0ae806fd8..139bbe55e9e16 100644 --- a/src/tools/tidy/src/allowed_run_make_makefiles.txt +++ b/src/tools/tidy/src/allowed_run_make_makefiles.txt @@ -238,7 +238,6 @@ run-make/relocation-model/Makefile run-make/relro-levels/Makefile run-make/remap-path-prefix-dwarf/Makefile run-make/remap-path-prefix/Makefile -run-make/repr128-dwarf/Makefile run-make/reproducible-build-2/Makefile run-make/reproducible-build/Makefile run-make/resolve-rename/Makefile diff --git a/tests/run-make/repr128-dwarf/Makefile b/tests/run-make/repr128-dwarf/Makefile deleted file mode 100644 index 3f933042724a3..0000000000000 --- a/tests/run-make/repr128-dwarf/Makefile +++ /dev/null @@ -1,16 +0,0 @@ -# ignore-windows -# This test should be replaced with one in tests/debuginfo once GDB or LLDB support 128-bit -# enums. - -include ../tools.mk - -all: - $(RUSTC) -Cdebuginfo=2 lib.rs -o $(TMPDIR)/repr128.rlib - "$(LLVM_BIN_DIR)"/llvm-dwarfdump -n U128A $(TMPDIR)/repr128.rlib | $(CGREP) "DW_AT_const_value (<0x10> 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 )" - "$(LLVM_BIN_DIR)"/llvm-dwarfdump -n U128B $(TMPDIR)/repr128.rlib | $(CGREP) "DW_AT_const_value (<0x10> 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 )" - "$(LLVM_BIN_DIR)"/llvm-dwarfdump -n U128C $(TMPDIR)/repr128.rlib | $(CGREP) "DW_AT_const_value (<0x10> 00 00 00 00 00 00 00 00 01 00 00 00 00 00 00 00 )" - "$(LLVM_BIN_DIR)"/llvm-dwarfdump -n U128D $(TMPDIR)/repr128.rlib | $(CGREP) "DW_AT_const_value (<0x10> ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff )" - "$(LLVM_BIN_DIR)"/llvm-dwarfdump -n I128A $(TMPDIR)/repr128.rlib | $(CGREP) "DW_AT_const_value (<0x10> 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 )" - "$(LLVM_BIN_DIR)"/llvm-dwarfdump -n I128B $(TMPDIR)/repr128.rlib | $(CGREP) "DW_AT_const_value (<0x10> ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff )" - "$(LLVM_BIN_DIR)"/llvm-dwarfdump -n I128C $(TMPDIR)/repr128.rlib | $(CGREP) "DW_AT_const_value (<0x10> 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 80 )" - "$(LLVM_BIN_DIR)"/llvm-dwarfdump -n I128D $(TMPDIR)/repr128.rlib | $(CGREP) "DW_AT_const_value (<0x10> ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff 7f )" diff --git a/tests/run-make/repr128-dwarf/lib.rs b/tests/run-make/repr128-dwarf/main.rs similarity index 89% rename from tests/run-make/repr128-dwarf/lib.rs rename to tests/run-make/repr128-dwarf/main.rs index 63675441d4bab..57923a8386db9 100644 --- a/tests/run-make/repr128-dwarf/lib.rs +++ b/tests/run-make/repr128-dwarf/main.rs @@ -1,4 +1,3 @@ -#![crate_type = "lib"] #![feature(repr128)] // Use .to_le() to ensure that the bytes are in the same order on both little- and big-endian @@ -21,3 +20,7 @@ pub enum I128Enum { } pub fn f(_: U128Enum, _: I128Enum) {} + +fn main() { + f(U128Enum::U128A, I128Enum::I128A); +} diff --git a/tests/run-make/repr128-dwarf/rmake.rs b/tests/run-make/repr128-dwarf/rmake.rs new file mode 100644 index 0000000000000..90c4b4edcb86c --- /dev/null +++ b/tests/run-make/repr128-dwarf/rmake.rs @@ -0,0 +1,67 @@ +//@ ignore-windows +// This test should be replaced with one in tests/debuginfo once GDB or LLDB support 128-bit enums. + +extern crate run_make_support; + +use gimli::{AttributeValue, Dwarf, EndianRcSlice, Reader, RunTimeEndian}; +use object::{Object, ObjectSection}; +use run_make_support::{gimli, object, rustc, tmp_dir}; +use std::borrow::Cow; +use std::collections::HashMap; +use std::rc::Rc; + +fn main() { + let output = tmp_dir().join("repr128"); + dbg!(&output); + rustc().input("main.rs").arg("-o").arg(&output).arg("-Cdebuginfo=2").run(); + let output = std::fs::read(output).unwrap(); + let obj = object::File::parse(output.as_slice()).unwrap(); + let endian = if obj.is_little_endian() { RunTimeEndian::Little } else { RunTimeEndian::Big }; + let dwarf = gimli::Dwarf::load(|section| -> Result<_, ()> { + let data = obj.section_by_name(section.name()).map(|s| s.uncompressed_data().unwrap()); + Ok(EndianRcSlice::new(Rc::from(data.unwrap_or_default().as_ref()), endian)) + }) + .unwrap(); + let mut iter = dwarf.units(); + let mut still_to_find = HashMap::from([ + ("U128A", 0_u128), + ("U128B", 1_u128), + ("U128C", u64::MAX as u128 + 1), + ("U128D", u128::MAX), + ("I128A", 0_i128 as u128), + ("I128B", (-1_i128) as u128), + ("I128C", i128::MIN as u128), + ("I128D", i128::MAX as u128), + ]); + while let Some(header) = iter.next().unwrap() { + let unit = dwarf.unit(header).unwrap(); + let mut cursor = unit.entries(); + while let Some((_, entry)) = cursor.next_dfs().unwrap() { + if entry.tag() == gimli::constants::DW_TAG_enumerator { + let name = dwarf + .attr_string( + &unit, + entry.attr(gimli::constants::DW_AT_name).unwrap().unwrap().value(), + ) + .unwrap(); + let name = name.to_string().unwrap(); + if let Some(expected) = still_to_find.remove(name.as_ref()) { + match entry.attr(gimli::constants::DW_AT_const_value).unwrap().unwrap().value() + { + AttributeValue::Block(value) => { + assert_eq!( + value.to_slice().unwrap(), + expected.to_le_bytes().as_slice(), + "{name}" + ); + } + value => panic!("{name}: unexpected DW_AT_const_value of {value:?}"), + } + } + } + } + } + if !still_to_find.is_empty() { + panic!("Didn't find debug entries for {still_to_find:?}"); + } +} diff --git a/tests/ui/associated-types/issue-25700.stderr b/tests/ui/associated-types/issue-25700.stderr index fb0e63c207a54..8d40e6905e07f 100644 --- a/tests/ui/associated-types/issue-25700.stderr +++ b/tests/ui/associated-types/issue-25700.stderr @@ -12,7 +12,10 @@ note: if `S<()>` implemented `Clone`, you could clone the value --> $DIR/issue-25700.rs:1:1 | LL | struct S(#[allow(dead_code)] Option<&'static T>); - | ^^^^^^^^^^^^^^^^^^^^ + | ^^^^^^^^^^^^^^^^^^^^ consider implementing `Clone` for this type +... +LL | drop(t); + | - you could clone this value error: aborting due to 1 previous error diff --git a/tests/ui/attributes/unix_sigpipe/auxiliary/assert-inherit-sig_dfl.rs b/tests/ui/attributes/unix_sigpipe/auxiliary/assert-inherit-sig_dfl.rs new file mode 100644 index 0000000000000..7f95fa7ebbece --- /dev/null +++ b/tests/ui/attributes/unix_sigpipe/auxiliary/assert-inherit-sig_dfl.rs @@ -0,0 +1,8 @@ +//@ aux-crate: sigpipe_utils=sigpipe-utils.rs + +#![feature(unix_sigpipe)] + +#[unix_sigpipe = "inherit"] +fn main() { + sigpipe_utils::assert_sigpipe_handler(sigpipe_utils::SignalHandler::Default); +} diff --git a/tests/ui/attributes/unix_sigpipe/auxiliary/assert-inherit-sig_ign.rs b/tests/ui/attributes/unix_sigpipe/auxiliary/assert-inherit-sig_ign.rs new file mode 100644 index 0000000000000..d96e8b8ef8436 --- /dev/null +++ b/tests/ui/attributes/unix_sigpipe/auxiliary/assert-inherit-sig_ign.rs @@ -0,0 +1,8 @@ +//@ aux-crate: sigpipe_utils=sigpipe-utils.rs + +#![feature(unix_sigpipe)] + +#[unix_sigpipe = "inherit"] +fn main() { + sigpipe_utils::assert_sigpipe_handler(sigpipe_utils::SignalHandler::Ignore); +} diff --git a/tests/ui/attributes/unix_sigpipe/unix_sigpipe-inherit.rs b/tests/ui/attributes/unix_sigpipe/unix_sigpipe-inherit.rs index db3407a7d55fc..694fa460e9bb4 100644 --- a/tests/ui/attributes/unix_sigpipe/unix_sigpipe-inherit.rs +++ b/tests/ui/attributes/unix_sigpipe/unix_sigpipe-inherit.rs @@ -1,14 +1,29 @@ +//@ ignore-cross-compile because aux-bin does not yet support it +//@ only-unix because SIGPIPE is a unix thing +//@ aux-bin: assert-inherit-sig_dfl.rs +//@ aux-bin: assert-inherit-sig_ign.rs //@ run-pass -//@ aux-build:sigpipe-utils.rs -#![feature(unix_sigpipe)] +#![feature(rustc_private, unix_sigpipe)] -#[unix_sigpipe = "inherit"] +extern crate libc; + +// By default the Rust runtime resets SIGPIPE to SIG_DFL before exec:ing child +// processes so opt-out of that with `#[unix_sigpipe = "sig_dfl"]`. See +// https://github.com/rust-lang/rust/blob/bf4de3a874753bbee3323081c8b0c133444fed2d/library/std/src/sys/pal/unix/process/process_unix.rs#L359-L384 +#[unix_sigpipe = "sig_dfl"] fn main() { - extern crate sigpipe_utils; + // First expect SIG_DFL in a child process with #[unix_sigpipe = "inherit"]. + assert_inherit_sigpipe_disposition("auxiliary/bin/assert-inherit-sig_dfl"); + + // With SIG_IGN we expect #[unix_sigpipe = "inherit"] to also get SIG_IGN. + unsafe { + libc::signal(libc::SIGPIPE, libc::SIG_IGN); + } + assert_inherit_sigpipe_disposition("auxiliary/bin/assert-inherit-sig_ign"); +} - // #[unix_sigpipe = "inherit"] is active, so SIGPIPE shall NOT be ignored, - // instead the default handler shall be installed. (We assume that the - // process that runs these tests have the default handler.) - sigpipe_utils::assert_sigpipe_handler(sigpipe_utils::SignalHandler::Default); +fn assert_inherit_sigpipe_disposition(aux_bin: &str) { + let mut cmd = std::process::Command::new(aux_bin); + assert!(cmd.status().unwrap().success()); } diff --git a/tests/ui/auto-traits/typeck-auto-trait-no-supertraits-2.stderr b/tests/ui/auto-traits/typeck-auto-trait-no-supertraits-2.stderr index dcf1c02bceefa..4c1de72798c45 100644 --- a/tests/ui/auto-traits/typeck-auto-trait-no-supertraits-2.stderr +++ b/tests/ui/auto-traits/typeck-auto-trait-no-supertraits-2.stderr @@ -23,6 +23,13 @@ LL | fn copy(x: T) -> (T, T) { (x, x) } | | value moved here | move occurs because `x` has type `T`, which does not implement the `Copy` trait | +help: if `T` implemented `Clone`, you could clone the value + --> $DIR/typeck-auto-trait-no-supertraits-2.rs:8:9 + | +LL | fn copy(x: T) -> (T, T) { (x, x) } + | ^ - you could clone this value + | | + | consider constraining this type parameter with `Clone` help: consider further restricting this bound | LL | fn copy(x: T) -> (T, T) { (x, x) } diff --git a/tests/ui/binop/binop-consume-args.stderr b/tests/ui/binop/binop-consume-args.stderr index 6fbbb55437eb2..1b59216b3c76c 100644 --- a/tests/ui/binop/binop-consume-args.stderr +++ b/tests/ui/binop/binop-consume-args.stderr @@ -8,6 +8,13 @@ LL | lhs + rhs; LL | drop(lhs); | ^^^ value used here after move | +help: if `A` implemented `Clone`, you could clone the value + --> $DIR/binop-consume-args.rs:5:8 + | +LL | fn add, B>(lhs: A, rhs: B) { + | ^ consider constraining this type parameter with `Clone` +LL | lhs + rhs; + | --- you could clone this value note: calling this operator moves the left-hand side --> $SRC_DIR/core/src/ops/arith.rs:LL:COL help: consider further restricting this bound @@ -26,6 +33,13 @@ LL | drop(lhs); LL | drop(rhs); | ^^^ value used here after move | +help: if `B` implemented `Clone`, you could clone the value + --> $DIR/binop-consume-args.rs:5:30 + | +LL | fn add, B>(lhs: A, rhs: B) { + | ^ consider constraining this type parameter with `Clone` +LL | lhs + rhs; + | --- you could clone this value help: consider restricting type parameter `B` | LL | fn add, B: Copy>(lhs: A, rhs: B) { @@ -41,6 +55,13 @@ LL | lhs - rhs; LL | drop(lhs); | ^^^ value used here after move | +help: if `A` implemented `Clone`, you could clone the value + --> $DIR/binop-consume-args.rs:11:8 + | +LL | fn sub, B>(lhs: A, rhs: B) { + | ^ consider constraining this type parameter with `Clone` +LL | lhs - rhs; + | --- you could clone this value note: calling this operator moves the left-hand side --> $SRC_DIR/core/src/ops/arith.rs:LL:COL help: consider further restricting this bound @@ -59,6 +80,13 @@ LL | drop(lhs); LL | drop(rhs); | ^^^ value used here after move | +help: if `B` implemented `Clone`, you could clone the value + --> $DIR/binop-consume-args.rs:11:30 + | +LL | fn sub, B>(lhs: A, rhs: B) { + | ^ consider constraining this type parameter with `Clone` +LL | lhs - rhs; + | --- you could clone this value help: consider restricting type parameter `B` | LL | fn sub, B: Copy>(lhs: A, rhs: B) { @@ -74,6 +102,13 @@ LL | lhs * rhs; LL | drop(lhs); | ^^^ value used here after move | +help: if `A` implemented `Clone`, you could clone the value + --> $DIR/binop-consume-args.rs:17:8 + | +LL | fn mul, B>(lhs: A, rhs: B) { + | ^ consider constraining this type parameter with `Clone` +LL | lhs * rhs; + | --- you could clone this value note: calling this operator moves the left-hand side --> $SRC_DIR/core/src/ops/arith.rs:LL:COL help: consider further restricting this bound @@ -92,6 +127,13 @@ LL | drop(lhs); LL | drop(rhs); | ^^^ value used here after move | +help: if `B` implemented `Clone`, you could clone the value + --> $DIR/binop-consume-args.rs:17:30 + | +LL | fn mul, B>(lhs: A, rhs: B) { + | ^ consider constraining this type parameter with `Clone` +LL | lhs * rhs; + | --- you could clone this value help: consider restricting type parameter `B` | LL | fn mul, B: Copy>(lhs: A, rhs: B) { @@ -107,6 +149,13 @@ LL | lhs / rhs; LL | drop(lhs); | ^^^ value used here after move | +help: if `A` implemented `Clone`, you could clone the value + --> $DIR/binop-consume-args.rs:23:8 + | +LL | fn div, B>(lhs: A, rhs: B) { + | ^ consider constraining this type parameter with `Clone` +LL | lhs / rhs; + | --- you could clone this value note: calling this operator moves the left-hand side --> $SRC_DIR/core/src/ops/arith.rs:LL:COL help: consider further restricting this bound @@ -125,6 +174,13 @@ LL | drop(lhs); LL | drop(rhs); | ^^^ value used here after move | +help: if `B` implemented `Clone`, you could clone the value + --> $DIR/binop-consume-args.rs:23:30 + | +LL | fn div, B>(lhs: A, rhs: B) { + | ^ consider constraining this type parameter with `Clone` +LL | lhs / rhs; + | --- you could clone this value help: consider restricting type parameter `B` | LL | fn div, B: Copy>(lhs: A, rhs: B) { @@ -140,6 +196,13 @@ LL | lhs % rhs; LL | drop(lhs); | ^^^ value used here after move | +help: if `A` implemented `Clone`, you could clone the value + --> $DIR/binop-consume-args.rs:29:8 + | +LL | fn rem, B>(lhs: A, rhs: B) { + | ^ consider constraining this type parameter with `Clone` +LL | lhs % rhs; + | --- you could clone this value note: calling this operator moves the left-hand side --> $SRC_DIR/core/src/ops/arith.rs:LL:COL help: consider further restricting this bound @@ -158,6 +221,13 @@ LL | drop(lhs); LL | drop(rhs); | ^^^ value used here after move | +help: if `B` implemented `Clone`, you could clone the value + --> $DIR/binop-consume-args.rs:29:30 + | +LL | fn rem, B>(lhs: A, rhs: B) { + | ^ consider constraining this type parameter with `Clone` +LL | lhs % rhs; + | --- you could clone this value help: consider restricting type parameter `B` | LL | fn rem, B: Copy>(lhs: A, rhs: B) { @@ -173,6 +243,13 @@ LL | lhs & rhs; LL | drop(lhs); | ^^^ value used here after move | +help: if `A` implemented `Clone`, you could clone the value + --> $DIR/binop-consume-args.rs:35:11 + | +LL | fn bitand, B>(lhs: A, rhs: B) { + | ^ consider constraining this type parameter with `Clone` +LL | lhs & rhs; + | --- you could clone this value note: calling this operator moves the left-hand side --> $SRC_DIR/core/src/ops/bit.rs:LL:COL help: consider further restricting this bound @@ -191,6 +268,13 @@ LL | drop(lhs); LL | drop(rhs); | ^^^ value used here after move | +help: if `B` implemented `Clone`, you could clone the value + --> $DIR/binop-consume-args.rs:35:36 + | +LL | fn bitand, B>(lhs: A, rhs: B) { + | ^ consider constraining this type parameter with `Clone` +LL | lhs & rhs; + | --- you could clone this value help: consider restricting type parameter `B` | LL | fn bitand, B: Copy>(lhs: A, rhs: B) { @@ -206,6 +290,13 @@ LL | lhs | rhs; LL | drop(lhs); | ^^^ value used here after move | +help: if `A` implemented `Clone`, you could clone the value + --> $DIR/binop-consume-args.rs:41:10 + | +LL | fn bitor, B>(lhs: A, rhs: B) { + | ^ consider constraining this type parameter with `Clone` +LL | lhs | rhs; + | --- you could clone this value note: calling this operator moves the left-hand side --> $SRC_DIR/core/src/ops/bit.rs:LL:COL help: consider further restricting this bound @@ -224,6 +315,13 @@ LL | drop(lhs); LL | drop(rhs); | ^^^ value used here after move | +help: if `B` implemented `Clone`, you could clone the value + --> $DIR/binop-consume-args.rs:41:34 + | +LL | fn bitor, B>(lhs: A, rhs: B) { + | ^ consider constraining this type parameter with `Clone` +LL | lhs | rhs; + | --- you could clone this value help: consider restricting type parameter `B` | LL | fn bitor, B: Copy>(lhs: A, rhs: B) { @@ -239,6 +337,13 @@ LL | lhs ^ rhs; LL | drop(lhs); | ^^^ value used here after move | +help: if `A` implemented `Clone`, you could clone the value + --> $DIR/binop-consume-args.rs:47:11 + | +LL | fn bitxor, B>(lhs: A, rhs: B) { + | ^ consider constraining this type parameter with `Clone` +LL | lhs ^ rhs; + | --- you could clone this value note: calling this operator moves the left-hand side --> $SRC_DIR/core/src/ops/bit.rs:LL:COL help: consider further restricting this bound @@ -257,6 +362,13 @@ LL | drop(lhs); LL | drop(rhs); | ^^^ value used here after move | +help: if `B` implemented `Clone`, you could clone the value + --> $DIR/binop-consume-args.rs:47:36 + | +LL | fn bitxor, B>(lhs: A, rhs: B) { + | ^ consider constraining this type parameter with `Clone` +LL | lhs ^ rhs; + | --- you could clone this value help: consider restricting type parameter `B` | LL | fn bitxor, B: Copy>(lhs: A, rhs: B) { @@ -272,6 +384,13 @@ LL | lhs << rhs; LL | drop(lhs); | ^^^ value used here after move | +help: if `A` implemented `Clone`, you could clone the value + --> $DIR/binop-consume-args.rs:53:8 + | +LL | fn shl, B>(lhs: A, rhs: B) { + | ^ consider constraining this type parameter with `Clone` +LL | lhs << rhs; + | --- you could clone this value note: calling this operator moves the left-hand side --> $SRC_DIR/core/src/ops/bit.rs:LL:COL help: consider further restricting this bound @@ -290,6 +409,13 @@ LL | drop(lhs); LL | drop(rhs); | ^^^ value used here after move | +help: if `B` implemented `Clone`, you could clone the value + --> $DIR/binop-consume-args.rs:53:30 + | +LL | fn shl, B>(lhs: A, rhs: B) { + | ^ consider constraining this type parameter with `Clone` +LL | lhs << rhs; + | --- you could clone this value help: consider restricting type parameter `B` | LL | fn shl, B: Copy>(lhs: A, rhs: B) { @@ -305,6 +431,13 @@ LL | lhs >> rhs; LL | drop(lhs); | ^^^ value used here after move | +help: if `A` implemented `Clone`, you could clone the value + --> $DIR/binop-consume-args.rs:59:8 + | +LL | fn shr, B>(lhs: A, rhs: B) { + | ^ consider constraining this type parameter with `Clone` +LL | lhs >> rhs; + | --- you could clone this value note: calling this operator moves the left-hand side --> $SRC_DIR/core/src/ops/bit.rs:LL:COL help: consider further restricting this bound @@ -323,6 +456,13 @@ LL | drop(lhs); LL | drop(rhs); | ^^^ value used here after move | +help: if `B` implemented `Clone`, you could clone the value + --> $DIR/binop-consume-args.rs:59:30 + | +LL | fn shr, B>(lhs: A, rhs: B) { + | ^ consider constraining this type parameter with `Clone` +LL | lhs >> rhs; + | --- you could clone this value help: consider restricting type parameter `B` | LL | fn shr, B: Copy>(lhs: A, rhs: B) { diff --git a/tests/ui/binop/binop-move-semantics.stderr b/tests/ui/binop/binop-move-semantics.stderr index 1dd8c9a87d472..83c27590e9014 100644 --- a/tests/ui/binop/binop-move-semantics.stderr +++ b/tests/ui/binop/binop-move-semantics.stderr @@ -11,6 +11,13 @@ LL | | x; | |_____value used here after move | `x` moved due to usage in operator | +help: if `T` implemented `Clone`, you could clone the value + --> $DIR/binop-move-semantics.rs:5:16 + | +LL | fn double_move>(x: T) { + | ^ consider constraining this type parameter with `Clone` +LL | x + | - you could clone this value note: calling this operator moves the left-hand side --> $SRC_DIR/core/src/ops/arith.rs:LL:COL help: consider further restricting this bound @@ -51,6 +58,14 @@ LL | x ... LL | use_mut(n); use_imm(m); | - borrow later used here + | +help: if `T` implemented `Clone`, you could clone the value + --> $DIR/binop-move-semantics.rs:17:18 + | +LL | fn move_borrowed>(x: T, mut y: T) { + | ^ consider constraining this type parameter with `Clone` +LL | let m = &x; + | -- you could clone this value error[E0505]: cannot move out of `y` because it is borrowed --> $DIR/binop-move-semantics.rs:23:5 @@ -65,6 +80,15 @@ LL | y; | ^ move out of `y` occurs here LL | use_mut(n); use_imm(m); | - borrow later used here + | +help: if `T` implemented `Clone`, you could clone the value + --> $DIR/binop-move-semantics.rs:17:18 + | +LL | fn move_borrowed>(x: T, mut y: T) { + | ^ consider constraining this type parameter with `Clone` +LL | let m = &x; +LL | let n = &mut y; + | ------ you could clone this value error[E0507]: cannot move out of `*m` which is behind a mutable reference --> $DIR/binop-move-semantics.rs:30:5 @@ -80,12 +104,29 @@ LL | | *n; | note: calling this operator moves the left-hand side --> $SRC_DIR/core/src/ops/arith.rs:LL:COL +help: if `T` implemented `Clone`, you could clone the value + --> $DIR/binop-move-semantics.rs:26:24 + | +LL | fn illegal_dereference>(mut x: T, y: T) { + | ^ consider constraining this type parameter with `Clone` +... +LL | *m + | -- you could clone this value error[E0507]: cannot move out of `*n` which is behind a shared reference --> $DIR/binop-move-semantics.rs:32:5 | LL | *n; | ^^ move occurs because `*n` has type `T`, which does not implement the `Copy` trait + | +help: if `T` implemented `Clone`, you could clone the value + --> $DIR/binop-move-semantics.rs:26:24 + | +LL | fn illegal_dereference>(mut x: T, y: T) { + | ^ consider constraining this type parameter with `Clone` +... +LL | *n; + | -- you could clone this value error[E0502]: cannot borrow `f` as immutable because it is also borrowed as mutable --> $DIR/binop-move-semantics.rs:54:5 diff --git a/tests/ui/borrowck/borrowck-move-by-capture.stderr b/tests/ui/borrowck/borrowck-move-by-capture.stderr index 01647011207f4..9915acfe06537 100644 --- a/tests/ui/borrowck/borrowck-move-by-capture.stderr +++ b/tests/ui/borrowck/borrowck-move-by-capture.stderr @@ -11,6 +11,12 @@ LL | let _h = to_fn_once(move || -> isize { *bar }); | | variable moved due to use in closure | | move occurs because `bar` has type `Box`, which does not implement the `Copy` trait | `bar` is moved here + | +help: clone the value before moving it into the closure + | +LL ~ let value = bar.clone(); +LL ~ let _h = to_fn_once(move || -> isize { value }); + | error: aborting due to 1 previous error diff --git a/tests/ui/borrowck/borrowck-move-out-of-static-item.stderr b/tests/ui/borrowck/borrowck-move-out-of-static-item.stderr index 86bddacbdc727..b4b60d40d9143 100644 --- a/tests/ui/borrowck/borrowck-move-out-of-static-item.stderr +++ b/tests/ui/borrowck/borrowck-move-out-of-static-item.stderr @@ -8,7 +8,10 @@ note: if `Foo` implemented `Clone`, you could clone the value --> $DIR/borrowck-move-out-of-static-item.rs:3:1 | LL | struct Foo { - | ^^^^^^^^^^ + | ^^^^^^^^^^ consider implementing `Clone` for this type +... +LL | test(BAR); + | --- you could clone this value error: aborting due to 1 previous error diff --git a/tests/ui/borrowck/borrowck-move-subcomponent.stderr b/tests/ui/borrowck/borrowck-move-subcomponent.stderr index 4d9477f85811d..cc6c3bdeb1022 100644 --- a/tests/ui/borrowck/borrowck-move-subcomponent.stderr +++ b/tests/ui/borrowck/borrowck-move-subcomponent.stderr @@ -14,7 +14,10 @@ note: if `S` implemented `Clone`, you could clone the value --> $DIR/borrowck-move-subcomponent.rs:6:1 | LL | struct S { - | ^^^^^^^^ + | ^^^^^^^^ consider implementing `Clone` for this type +... +LL | let pb = &a; + | -- you could clone this value error: aborting due to 1 previous error diff --git a/tests/ui/borrowck/borrowck-overloaded-call.stderr b/tests/ui/borrowck/borrowck-overloaded-call.stderr index 1602058c183fc..c3b7b0b6080c6 100644 --- a/tests/ui/borrowck/borrowck-overloaded-call.stderr +++ b/tests/ui/borrowck/borrowck-overloaded-call.stderr @@ -34,7 +34,10 @@ note: if `SFnOnce` implemented `Clone`, you could clone the value --> $DIR/borrowck-overloaded-call.rs:41:1 | LL | struct SFnOnce { - | ^^^^^^^^^^^^^^ + | ^^^^^^^^^^^^^^ consider implementing `Clone` for this type +... +LL | s(" world".to_string()); + | - you could clone this value error: aborting due to 3 previous errors diff --git a/tests/ui/borrowck/clone-on-ref.stderr b/tests/ui/borrowck/clone-on-ref.stderr index f0eaf4bac7dfa..19f040556f8ae 100644 --- a/tests/ui/borrowck/clone-on-ref.stderr +++ b/tests/ui/borrowck/clone-on-ref.stderr @@ -32,6 +32,13 @@ LL | LL | println!("{b}"); | --- borrow later used here | +help: if `T` implemented `Clone`, you could clone the value + --> $DIR/clone-on-ref.rs:11:8 + | +LL | fn bar(x: T) { + | ^ consider constraining this type parameter with `Clone` +LL | let a = &x; + | -- you could clone this value help: consider further restricting this bound | LL | fn bar(x: T) { @@ -56,7 +63,10 @@ note: if `A` implemented `Clone`, you could clone the value --> $DIR/clone-on-ref.rs:19:1 | LL | struct A; - | ^^^^^^^^ + | ^^^^^^^^ consider implementing `Clone` for this type +LL | fn qux(x: A) { +LL | let a = &x; + | -- you could clone this value help: consider annotating `A` with `#[derive(Clone)]` | LL + #[derive(Clone)] diff --git a/tests/ui/borrowck/issue-101119.stderr b/tests/ui/borrowck/issue-101119.stderr index b4775496f4f48..a894fa63ace28 100644 --- a/tests/ui/borrowck/issue-101119.stderr +++ b/tests/ui/borrowck/issue-101119.stderr @@ -22,7 +22,10 @@ note: if `State` implemented `Clone`, you could clone the value --> $DIR/issue-101119.rs:1:1 | LL | struct State; - | ^^^^^^^^^^^^ + | ^^^^^^^^^^^^ consider implementing `Clone` for this type +... +LL | fill_segment(state); + | ----- you could clone this value error: aborting due to 1 previous error diff --git a/tests/ui/borrowck/issue-103624.stderr b/tests/ui/borrowck/issue-103624.stderr index 94421c35c65d2..603055beadcef 100644 --- a/tests/ui/borrowck/issue-103624.stderr +++ b/tests/ui/borrowck/issue-103624.stderr @@ -13,8 +13,11 @@ LL | self.b; note: if `StructB` implemented `Clone`, you could clone the value --> $DIR/issue-103624.rs:23:1 | +LL | self.b; + | ------ you could clone this value +... LL | struct StructB {} - | ^^^^^^^^^^^^^^ + | ^^^^^^^^^^^^^^ consider implementing `Clone` for this type error[E0521]: borrowed data escapes outside of method --> $DIR/issue-103624.rs:14:9 diff --git a/tests/ui/borrowck/issue-119915-bad-clone-suggestion.stderr b/tests/ui/borrowck/issue-119915-bad-clone-suggestion.stderr index 701f00d079d38..dde17d1f6523c 100644 --- a/tests/ui/borrowck/issue-119915-bad-clone-suggestion.stderr +++ b/tests/ui/borrowck/issue-119915-bad-clone-suggestion.stderr @@ -15,7 +15,10 @@ note: if `Example` implemented `Clone`, you could clone the value --> $DIR/issue-119915-bad-clone-suggestion.rs:3:1 | LL | struct Example(PhantomData<(fn(E), fn(FakeParam))>); - | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ consider implementing `Clone` for this type +... +LL | unsafe { self.change() } + | ---- you could clone this value error: aborting due to 1 previous error diff --git a/tests/ui/borrowck/issue-17718-static-move.stderr b/tests/ui/borrowck/issue-17718-static-move.stderr index e2c3a9d5a2663..057ac6d7e3df9 100644 --- a/tests/ui/borrowck/issue-17718-static-move.stderr +++ b/tests/ui/borrowck/issue-17718-static-move.stderr @@ -8,7 +8,10 @@ note: if `Foo` implemented `Clone`, you could clone the value --> $DIR/issue-17718-static-move.rs:1:1 | LL | struct Foo; - | ^^^^^^^^^^ + | ^^^^^^^^^^ consider implementing `Clone` for this type +... +LL | let _a = FOO; + | --- you could clone this value help: consider borrowing here | LL | let _a = &FOO; diff --git a/tests/ui/borrowck/issue-20801.stderr b/tests/ui/borrowck/issue-20801.stderr index 1da6f0bef0234..20a4bd4e42378 100644 --- a/tests/ui/borrowck/issue-20801.stderr +++ b/tests/ui/borrowck/issue-20801.stderr @@ -23,7 +23,10 @@ note: if `T` implemented `Clone`, you could clone the value --> $DIR/issue-20801.rs:3:1 | LL | struct T(u8); - | ^^^^^^^^ + | ^^^^^^^^ consider implementing `Clone` for this type +... +LL | let a = unsafe { *mut_ref() }; + | ---------- you could clone this value help: consider removing the dereference here | LL - let a = unsafe { *mut_ref() }; @@ -40,7 +43,10 @@ note: if `T` implemented `Clone`, you could clone the value --> $DIR/issue-20801.rs:3:1 | LL | struct T(u8); - | ^^^^^^^^ + | ^^^^^^^^ consider implementing `Clone` for this type +... +LL | let b = unsafe { *imm_ref() }; + | ---------- you could clone this value help: consider removing the dereference here | LL - let b = unsafe { *imm_ref() }; @@ -57,7 +63,10 @@ note: if `T` implemented `Clone`, you could clone the value --> $DIR/issue-20801.rs:3:1 | LL | struct T(u8); - | ^^^^^^^^ + | ^^^^^^^^ consider implementing `Clone` for this type +... +LL | let c = unsafe { *mut_ptr() }; + | ---------- you could clone this value help: consider removing the dereference here | LL - let c = unsafe { *mut_ptr() }; @@ -74,7 +83,10 @@ note: if `T` implemented `Clone`, you could clone the value --> $DIR/issue-20801.rs:3:1 | LL | struct T(u8); - | ^^^^^^^^ + | ^^^^^^^^ consider implementing `Clone` for this type +... +LL | let d = unsafe { *const_ptr() }; + | ------------ you could clone this value help: consider removing the dereference here | LL - let d = unsafe { *const_ptr() }; diff --git a/tests/ui/borrowck/move-error-in-promoted-2.stderr b/tests/ui/borrowck/move-error-in-promoted-2.stderr index 43f4e820857a0..1e9b1d5209cb6 100644 --- a/tests/ui/borrowck/move-error-in-promoted-2.stderr +++ b/tests/ui/borrowck/move-error-in-promoted-2.stderr @@ -11,7 +11,10 @@ note: if `S` implemented `Clone`, you could clone the value --> $DIR/move-error-in-promoted-2.rs:3:1 | LL | struct S; - | ^^^^^^^^ + | ^^^^^^^^ consider implementing `Clone` for this type +... +LL | &([S][0],); + | ------ you could clone this value error: aborting due to 1 previous error diff --git a/tests/ui/borrowck/move-error-snippets.stderr b/tests/ui/borrowck/move-error-snippets.stderr index 40b64398aef6a..97d140515184a 100644 --- a/tests/ui/borrowck/move-error-snippets.stderr +++ b/tests/ui/borrowck/move-error-snippets.stderr @@ -13,7 +13,12 @@ note: if `A` implemented `Clone`, you could clone the value --> $DIR/move-error-snippets.rs:9:1 | LL | struct A; - | ^^^^^^^^ + | ^^^^^^^^ consider implementing `Clone` for this type + | + ::: $DIR/move-error-snippets-ext.rs:5:17 + | +LL | let a = $c; + | -- you could clone this value = note: this error originates in the macro `aaa` which comes from the expansion of the macro `sss` (in Nightly builds, run with -Z macro-backtrace for more info) help: consider borrowing here | diff --git a/tests/ui/borrowck/move-in-static-initializer-issue-38520.stderr b/tests/ui/borrowck/move-in-static-initializer-issue-38520.stderr index a4e70b506462d..009e85a8031ee 100644 --- a/tests/ui/borrowck/move-in-static-initializer-issue-38520.stderr +++ b/tests/ui/borrowck/move-in-static-initializer-issue-38520.stderr @@ -8,7 +8,10 @@ note: if `Foo` implemented `Clone`, you could clone the value --> $DIR/move-in-static-initializer-issue-38520.rs:5:1 | LL | struct Foo(usize); - | ^^^^^^^^^^ + | ^^^^^^^^^^ consider implementing `Clone` for this type +... +LL | static Y: usize = get(*&X); + | --- you could clone this value error[E0507]: cannot move out of a shared reference --> $DIR/move-in-static-initializer-issue-38520.rs:13:22 @@ -20,7 +23,10 @@ note: if `Foo` implemented `Clone`, you could clone the value --> $DIR/move-in-static-initializer-issue-38520.rs:5:1 | LL | struct Foo(usize); - | ^^^^^^^^^^ + | ^^^^^^^^^^ consider implementing `Clone` for this type +... +LL | const Z: usize = get(*&X); + | --- you could clone this value error: aborting due to 2 previous errors diff --git a/tests/ui/box/leak-alloc.stderr b/tests/ui/box/leak-alloc.stderr index 53ff5f0107df3..bdaa9449f913e 100644 --- a/tests/ui/box/leak-alloc.stderr +++ b/tests/ui/box/leak-alloc.stderr @@ -16,7 +16,10 @@ note: if `Alloc` implemented `Clone`, you could clone the value --> $DIR/leak-alloc.rs:8:1 | LL | struct Alloc {} - | ^^^^^^^^^^^^ + | ^^^^^^^^^^^^ consider implementing `Clone` for this type +... +LL | let boxed = Box::new_in(10, alloc.by_ref()); + | ----- you could clone this value error: aborting due to 1 previous error diff --git a/tests/ui/coroutine/borrowing.stderr b/tests/ui/coroutine/borrowing.stderr index acd4cdafdfdf7..22e331c6923d6 100644 --- a/tests/ui/coroutine/borrowing.stderr +++ b/tests/ui/coroutine/borrowing.stderr @@ -4,6 +4,7 @@ error[E0597]: `a` does not live long enough LL | let _b = { | -- borrow later stored here LL | let a = 3; + | - binding `a` declared here LL | Pin::new(&mut || yield &a).resume(()) | -- ^ borrowed value does not live long enough | | @@ -18,6 +19,7 @@ error[E0597]: `a` does not live long enough LL | let _b = { | -- borrow later stored here LL | let a = 3; + | - binding `a` declared here LL | || { | -- value captured here by coroutine LL | yield &a diff --git a/tests/ui/coroutine/dropck.stderr b/tests/ui/coroutine/dropck.stderr index 241d6dfe0a169..1148b9eed718b 100644 --- a/tests/ui/coroutine/dropck.stderr +++ b/tests/ui/coroutine/dropck.stderr @@ -18,6 +18,9 @@ LL | } error[E0597]: `ref_` does not live long enough --> $DIR/dropck.rs:15:18 | +LL | let ref_ = Box::leak(Box::new(Some(cell.borrow_mut()))); + | ---- binding `ref_` declared here +... LL | gen = || { | -- value captured here by coroutine LL | // but the coroutine can use it to drop a `Ref<'a, i32>`. diff --git a/tests/ui/delegation/auxiliary/fn-header-aux.rs b/tests/ui/delegation/auxiliary/fn-header-aux.rs new file mode 100644 index 0000000000000..d26209a4f789f --- /dev/null +++ b/tests/ui/delegation/auxiliary/fn-header-aux.rs @@ -0,0 +1,9 @@ +//@ edition:2018 + +#![feature(c_variadic)] + +pub unsafe fn unsafe_fn_extern() {} +pub extern "C" fn extern_fn_extern() {} +pub unsafe extern "C" fn variadic_fn_extern(n: usize, mut args: ...) {} +pub const fn const_fn_extern() {} +pub async fn async_fn_extern() {} diff --git a/tests/ui/delegation/fn-header.rs b/tests/ui/delegation/fn-header.rs new file mode 100644 index 0000000000000..db20e1058e061 --- /dev/null +++ b/tests/ui/delegation/fn-header.rs @@ -0,0 +1,57 @@ +//@ check-pass +//@ edition:2018 +//@ aux-crate:fn_header_aux=fn-header-aux.rs + +#![feature(c_variadic)] +#![feature(fn_delegation)] +#![allow(incomplete_features)] +#![deny(unused_unsafe)] + +mod to_reuse { + pub unsafe fn unsafe_fn() {} + pub extern "C" fn extern_fn() {} + pub unsafe extern "C" fn variadic_fn(n: usize, mut args: ...) {} + pub const fn const_fn() {} + pub async fn async_fn() {} +} + +reuse to_reuse::unsafe_fn; +reuse to_reuse::extern_fn; +reuse to_reuse::variadic_fn; +reuse to_reuse::const_fn; +reuse to_reuse::async_fn; + +reuse fn_header_aux::unsafe_fn_extern; +reuse fn_header_aux::extern_fn_extern; +reuse fn_header_aux::variadic_fn_extern; +reuse fn_header_aux::const_fn_extern; +reuse fn_header_aux::async_fn_extern; + +const fn const_check() { + const_fn(); + const_fn_extern(); +} + +async fn async_check() { + async_fn().await; + async_fn_extern().await; +} + +fn main() { + unsafe { + unsafe_fn(); + unsafe_fn_extern(); + } + extern_fn(); + extern_fn_extern(); + let _: extern "C" fn() = extern_fn; + let _: extern "C" fn() = extern_fn_extern; + unsafe { + variadic_fn(0); + variadic_fn(0, 1); + variadic_fn_extern(0); + variadic_fn_extern(0, 1); + } + let _: unsafe extern "C" fn(usize, ...) = variadic_fn; + let _: unsafe extern "C" fn(usize, ...) = variadic_fn_extern; +} diff --git a/tests/ui/delegation/impl-trait.rs b/tests/ui/delegation/impl-trait.rs new file mode 100644 index 0000000000000..13df0155485c9 --- /dev/null +++ b/tests/ui/delegation/impl-trait.rs @@ -0,0 +1,27 @@ +//@ check-pass + +#![feature(fn_delegation)] +#![allow(incomplete_features)] + +mod to_reuse { + pub fn foo() -> impl Clone { 0 } +} + +reuse to_reuse::foo; + +trait Trait { + fn bar() -> impl Clone { 1 } +} + +struct S; +impl Trait for S {} + +impl S { + reuse to_reuse::foo; + reuse ::bar; +} + +fn main() { + foo().clone(); + ::bar().clone(); +} diff --git a/tests/ui/delegation/not-supported.rs b/tests/ui/delegation/not-supported.rs index 9dccb12b57adb..5f78de97638b5 100644 --- a/tests/ui/delegation/not-supported.rs +++ b/tests/ui/delegation/not-supported.rs @@ -14,9 +14,9 @@ mod generics { fn foo3<'a: 'a>(_: &'a u32) {} reuse GenericTrait::bar; - //~^ delegation with early bound generics is not supported yet + //~^ ERROR delegation with early bound generics is not supported yet reuse GenericTrait::bar1; - //~^ delegation with early bound generics is not supported yet + //~^ ERROR delegation with early bound generics is not supported yet } struct F; @@ -73,26 +73,18 @@ mod opaque { } reuse to_reuse::opaque_arg; //~^ ERROR delegation with early bound generics is not supported yet - reuse to_reuse::opaque_ret; - //~^ ERROR delegation to a function with opaque type is not supported yet -} -mod fn_header { - mod to_reuse { - pub unsafe fn unsafe_fn() {} - pub extern "C" fn extern_fn() {} - pub unsafe extern "C" fn variadic_fn(n: usize, mut args: ...) {} - pub const fn const_fn() {} + trait ToReuse { + fn opaque_ret() -> impl Trait { unimplemented!() } } - reuse to_reuse::unsafe_fn; - //~^ ERROR delegation to unsafe functions is not supported yet - reuse to_reuse::extern_fn; - //~^ ERROR delegation to non Rust ABI functions is not supported yet - reuse to_reuse::variadic_fn; - //~^ ERROR delegation to variadic functions is not supported yet - reuse to_reuse::const_fn; - //~^ ERROR delegation to const functions is not supported yet + // FIXME: Inherited `impl Trait`s create query cycles when used inside trait impls. + impl ToReuse for u8 { + reuse to_reuse::opaque_ret; //~ ERROR cycle detected when computing type + } + impl ToReuse for u16 { + reuse ToReuse::opaque_ret; //~ ERROR cycle detected when computing type + } } mod recursive { diff --git a/tests/ui/delegation/not-supported.stderr b/tests/ui/delegation/not-supported.stderr index f6c49366899c1..e2cb04f977b1e 100644 --- a/tests/ui/delegation/not-supported.stderr +++ b/tests/ui/delegation/not-supported.stderr @@ -115,53 +115,46 @@ LL | pub fn opaque_arg(_: impl Trait) -> i32 { 0 } LL | reuse to_reuse::opaque_arg; | ^^^^^^^^^^ -error: delegation to a function with opaque type is not supported yet - --> $DIR/not-supported.rs:76:21 +error[E0391]: cycle detected when computing type of `opaque::::{synthetic#0}` + --> $DIR/not-supported.rs:83:25 | -LL | pub fn opaque_ret() -> impl Trait { unimplemented!() } - | --------------------------------- callee defined here -... -LL | reuse to_reuse::opaque_ret; - | ^^^^^^^^^^ - -error: delegation to unsafe functions is not supported yet - --> $DIR/not-supported.rs:88:21 +LL | reuse to_reuse::opaque_ret; + | ^^^^^^^^^^ | -LL | pub unsafe fn unsafe_fn() {} - | ------------------------- callee defined here -... -LL | reuse to_reuse::unsafe_fn; - | ^^^^^^^^^ - -error: delegation to non Rust ABI functions is not supported yet - --> $DIR/not-supported.rs:90:21 +note: ...which requires comparing an impl and trait method signature, inferring any hidden `impl Trait` types in the process... + --> $DIR/not-supported.rs:83:25 | -LL | pub extern "C" fn extern_fn() {} - | ----------------------------- callee defined here -... -LL | reuse to_reuse::extern_fn; - | ^^^^^^^^^ - -error: delegation to variadic functions is not supported yet - --> $DIR/not-supported.rs:92:21 +LL | reuse to_reuse::opaque_ret; + | ^^^^^^^^^^ + = note: ...which again requires computing type of `opaque::::{synthetic#0}`, completing the cycle +note: cycle used when checking that `opaque::` is well-formed + --> $DIR/not-supported.rs:82:5 | -LL | pub unsafe extern "C" fn variadic_fn(n: usize, mut args: ...) {} - | ------------------------------------------------------------- callee defined here -... -LL | reuse to_reuse::variadic_fn; - | ^^^^^^^^^^^ +LL | impl ToReuse for u8 { + | ^^^^^^^^^^^^^^^^^^^ + = note: see https://rustc-dev-guide.rust-lang.org/overview.html#queries and https://rustc-dev-guide.rust-lang.org/query.html for more information -error: delegation to const functions is not supported yet - --> $DIR/not-supported.rs:94:21 +error[E0391]: cycle detected when computing type of `opaque::::{synthetic#0}` + --> $DIR/not-supported.rs:86:24 | -LL | pub const fn const_fn() {} - | ----------------------- callee defined here -... -LL | reuse to_reuse::const_fn; - | ^^^^^^^^ +LL | reuse ToReuse::opaque_ret; + | ^^^^^^^^^^ + | +note: ...which requires comparing an impl and trait method signature, inferring any hidden `impl Trait` types in the process... + --> $DIR/not-supported.rs:86:24 + | +LL | reuse ToReuse::opaque_ret; + | ^^^^^^^^^^ + = note: ...which again requires computing type of `opaque::::{synthetic#0}`, completing the cycle +note: cycle used when checking that `opaque::` is well-formed + --> $DIR/not-supported.rs:85:5 + | +LL | impl ToReuse for u16 { + | ^^^^^^^^^^^^^^^^^^^^ + = note: see https://rustc-dev-guide.rust-lang.org/overview.html#queries and https://rustc-dev-guide.rust-lang.org/query.html for more information error: recursive delegation is not supported yet - --> $DIR/not-supported.rs:107:22 + --> $DIR/not-supported.rs:99:22 | LL | pub reuse to_reuse2::foo; | --- callee defined here @@ -169,7 +162,7 @@ LL | pub reuse to_reuse2::foo; LL | reuse to_reuse1::foo; | ^^^ -error: aborting due to 19 previous errors +error: aborting due to 16 previous errors -Some errors have detailed explanations: E0049, E0195. +Some errors have detailed explanations: E0049, E0195, E0391. For more information about an error, try `rustc --explain E0049`. diff --git a/tests/ui/delegation/rename.rs b/tests/ui/delegation/rename.rs new file mode 100644 index 0000000000000..f4b3da76c56c7 --- /dev/null +++ b/tests/ui/delegation/rename.rs @@ -0,0 +1,20 @@ +//@ check-pass + +#![feature(fn_delegation)] +#![allow(incomplete_features)] + +mod to_reuse { + pub fn a() {} +} + +reuse to_reuse::a as b; + +struct S; +impl S { + reuse to_reuse::a as b; +} + +fn main() { + b(); + S::b(); +} diff --git a/tests/ui/derives/deriving-with-repr-packed.stderr b/tests/ui/derives/deriving-with-repr-packed.stderr index 26ac532263fd0..a8523d25cab9b 100644 --- a/tests/ui/derives/deriving-with-repr-packed.stderr +++ b/tests/ui/derives/deriving-with-repr-packed.stderr @@ -40,7 +40,10 @@ note: if `Y` implemented `Clone`, you could clone the value --> $DIR/deriving-with-repr-packed.rs:16:1 | LL | struct Y(usize); - | ^^^^^^^^ + | ^^^^^^^^ consider implementing `Clone` for this type +... +LL | struct X(Y); + | - you could clone this value = note: `#[derive(Debug)]` triggers a move because taking references to the fields of a packed struct is undefined behaviour = note: this error originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info) diff --git a/tests/ui/error-codes/E0504.stderr b/tests/ui/error-codes/E0504.stderr index 900cb706bd97c..343bca9a72e24 100644 --- a/tests/ui/error-codes/E0504.stderr +++ b/tests/ui/error-codes/E0504.stderr @@ -18,7 +18,10 @@ note: if `FancyNum` implemented `Clone`, you could clone the value --> $DIR/E0504.rs:1:1 | LL | struct FancyNum { - | ^^^^^^^^^^^^^^^ + | ^^^^^^^^^^^^^^^ consider implementing `Clone` for this type +... +LL | let fancy_ref = &fancy_num; + | ---------- you could clone this value error: aborting due to 1 previous error diff --git a/tests/ui/error-codes/E0505.stderr b/tests/ui/error-codes/E0505.stderr index ce01298a70d90..266df9ea32a71 100644 --- a/tests/ui/error-codes/E0505.stderr +++ b/tests/ui/error-codes/E0505.stderr @@ -15,7 +15,10 @@ note: if `Value` implemented `Clone`, you could clone the value --> $DIR/E0505.rs:1:1 | LL | struct Value {} - | ^^^^^^^^^^^^ + | ^^^^^^^^^^^^ consider implementing `Clone` for this type +... +LL | let _ref_to_val: &Value = &x; + | -- you could clone this value error: aborting due to 1 previous error diff --git a/tests/ui/error-codes/E0507.stderr b/tests/ui/error-codes/E0507.stderr index 60a4daa9d382e..70d99ea2cce5c 100644 --- a/tests/ui/error-codes/E0507.stderr +++ b/tests/ui/error-codes/E0507.stderr @@ -15,7 +15,10 @@ note: if `TheDarkKnight` implemented `Clone`, you could clone the value --> $DIR/E0507.rs:3:1 | LL | struct TheDarkKnight; - | ^^^^^^^^^^^^^^^^^^^^ + | ^^^^^^^^^^^^^^^^^^^^ consider implementing `Clone` for this type +... +LL | x.borrow().nothing_is_true(); + | ---------- you could clone this value error: aborting due to 1 previous error diff --git a/tests/ui/error-codes/E0508-fail.stderr b/tests/ui/error-codes/E0508-fail.stderr index 96d3bcb67a57f..fcfac399e0df5 100644 --- a/tests/ui/error-codes/E0508-fail.stderr +++ b/tests/ui/error-codes/E0508-fail.stderr @@ -11,7 +11,10 @@ note: if `NonCopy` implemented `Clone`, you could clone the value --> $DIR/E0508-fail.rs:1:1 | LL | struct NonCopy; - | ^^^^^^^^^^^^^^ + | ^^^^^^^^^^^^^^ consider implementing `Clone` for this type +... +LL | let _value = array[0]; + | -------- you could clone this value help: consider borrowing here | LL | let _value = &array[0]; diff --git a/tests/ui/error-codes/E0508.stderr b/tests/ui/error-codes/E0508.stderr index c1b622e243213..b9fa0f4d17a5f 100644 --- a/tests/ui/error-codes/E0508.stderr +++ b/tests/ui/error-codes/E0508.stderr @@ -11,7 +11,10 @@ note: if `NonCopy` implemented `Clone`, you could clone the value --> $DIR/E0508.rs:1:1 | LL | struct NonCopy; - | ^^^^^^^^^^^^^^ + | ^^^^^^^^^^^^^^ consider implementing `Clone` for this type +... +LL | let _value = array[0]; + | -------- you could clone this value help: consider borrowing here | LL | let _value = &array[0]; diff --git a/tests/ui/error-codes/E0509.stderr b/tests/ui/error-codes/E0509.stderr index 75c372d044019..628a253e08593 100644 --- a/tests/ui/error-codes/E0509.stderr +++ b/tests/ui/error-codes/E0509.stderr @@ -11,7 +11,10 @@ note: if `FancyNum` implemented `Clone`, you could clone the value --> $DIR/E0509.rs:1:1 | LL | struct FancyNum { - | ^^^^^^^^^^^^^^^ + | ^^^^^^^^^^^^^^^ consider implementing `Clone` for this type +... +LL | let fancy_field = drop_struct.fancy; + | ----------------- you could clone this value help: consider borrowing here | LL | let fancy_field = &drop_struct.fancy; diff --git a/tests/ui/fn/suggest-return-closure.rs b/tests/ui/fn/suggest-return-closure.rs index 81f2027286791..30e25ca8edccd 100644 --- a/tests/ui/fn/suggest-return-closure.rs +++ b/tests/ui/fn/suggest-return-closure.rs @@ -18,6 +18,7 @@ fn fn_mut() -> _ { //~| NOTE for more information on `Fn` traits and closure types let x = String::new(); //~^ HELP: consider changing this to be mutable + //~| NOTE binding `x` declared here |c| { //~ NOTE: value captured here x.push(c); //~^ ERROR: does not live long enough diff --git a/tests/ui/fn/suggest-return-closure.stderr b/tests/ui/fn/suggest-return-closure.stderr index 8e80a11fe1b08..d276ce8be2ba5 100644 --- a/tests/ui/fn/suggest-return-closure.stderr +++ b/tests/ui/fn/suggest-return-closure.stderr @@ -21,7 +21,7 @@ LL | fn fn_mut() -> _ { = note: for more information on `Fn` traits and closure types, see https://doc.rust-lang.org/book/ch13-01-closures.html error[E0121]: the placeholder `_` is not allowed within types on item signatures for return types - --> $DIR/suggest-return-closure.rs:31:13 + --> $DIR/suggest-return-closure.rs:32:13 | LL | fn fun() -> _ { | ^ @@ -32,7 +32,7 @@ LL | fn fun() -> _ { = note: for more information on `Fn` traits and closure types, see https://doc.rust-lang.org/book/ch13-01-closures.html error[E0596]: cannot borrow `x` as mutable, as it is not declared as mutable - --> $DIR/suggest-return-closure.rs:22:9 + --> $DIR/suggest-return-closure.rs:23:9 | LL | let x = String::new(); | - help: consider changing this to be mutable: `mut x` @@ -41,8 +41,11 @@ LL | x.push(c); | ^ cannot borrow as mutable error[E0597]: `x` does not live long enough - --> $DIR/suggest-return-closure.rs:22:9 + --> $DIR/suggest-return-closure.rs:23:9 | +LL | let x = String::new(); + | - binding `x` declared here +... LL | |c| { | --- value captured here LL | x.push(c); diff --git a/tests/ui/issues/issue-17385.stderr b/tests/ui/issues/issue-17385.stderr index 988db0fb1fc4b..3c451a859e94c 100644 --- a/tests/ui/issues/issue-17385.stderr +++ b/tests/ui/issues/issue-17385.stderr @@ -12,7 +12,10 @@ note: if `X` implemented `Clone`, you could clone the value --> $DIR/issue-17385.rs:1:1 | LL | struct X(isize); - | ^^^^^^^^ + | ^^^^^^^^ consider implementing `Clone` for this type +... +LL | drop(foo); + | --- you could clone this value error[E0382]: use of moved value: `e` --> $DIR/issue-17385.rs:25:11 @@ -28,7 +31,10 @@ note: if `Enum` implemented `Clone`, you could clone the value --> $DIR/issue-17385.rs:3:1 | LL | enum Enum { - | ^^^^^^^^^ + | ^^^^^^^^^ consider implementing `Clone` for this type +... +LL | drop(e); + | - you could clone this value error: aborting due to 2 previous errors diff --git a/tests/ui/issues/issue-24357.rs b/tests/ui/issues/issue-24357.rs index d1a9e37251ee7..63c061594d87e 100644 --- a/tests/ui/issues/issue-24357.rs +++ b/tests/ui/issues/issue-24357.rs @@ -1,10 +1,12 @@ struct NoCopy; //~ NOTE if `NoCopy` implemented `Clone`, you could clone the value +//~^ NOTE consider implementing `Clone` for this type fn main() { let x = NoCopy; //~^ NOTE move occurs because `x` has type `NoCopy` let f = move || { let y = x; }; //~^ NOTE value moved into closure here //~| NOTE variable moved due to use in closure + //~| NOTE you could clone this value let z = x; //~^ ERROR use of moved value: `x` //~| NOTE value used here after move diff --git a/tests/ui/issues/issue-24357.stderr b/tests/ui/issues/issue-24357.stderr index 6d50eea7e21a0..2d85077fe4c21 100644 --- a/tests/ui/issues/issue-24357.stderr +++ b/tests/ui/issues/issue-24357.stderr @@ -1,5 +1,5 @@ error[E0382]: use of moved value: `x` - --> $DIR/issue-24357.rs:8:12 + --> $DIR/issue-24357.rs:10:12 | LL | let x = NoCopy; | - move occurs because `x` has type `NoCopy`, which does not implement the `Copy` trait @@ -16,7 +16,10 @@ note: if `NoCopy` implemented `Clone`, you could clone the value --> $DIR/issue-24357.rs:1:1 | LL | struct NoCopy; - | ^^^^^^^^^^^^^ + | ^^^^^^^^^^^^^ consider implementing `Clone` for this type +... +LL | let f = move || { let y = x; }; + | - you could clone this value error: aborting due to 1 previous error diff --git a/tests/ui/issues/issue-4335.stderr b/tests/ui/issues/issue-4335.stderr index 8b4aff54dc3c0..14b5cfa9f9ac4 100644 --- a/tests/ui/issues/issue-4335.stderr +++ b/tests/ui/issues/issue-4335.stderr @@ -7,6 +7,14 @@ LL | id(Box::new(|| *v)) | -- ^^ move occurs because `*v` has type `T`, which does not implement the `Copy` trait | | | captured by this `FnMut` closure + | +help: if `T` implemented `Clone`, you could clone the value + --> $DIR/issue-4335.rs:5:10 + | +LL | fn f<'r, T>(v: &'r T) -> Box T + 'r> { + | ^ consider constraining this type parameter with `Clone` +LL | id(Box::new(|| *v)) + | -- you could clone this value error: aborting due to 1 previous error diff --git a/tests/ui/mir/issue-102389.stderr b/tests/ui/mir/issue-102389.stderr index 838eaffb5a0dc..162d7ac031a67 100644 --- a/tests/ui/mir/issue-102389.stderr +++ b/tests/ui/mir/issue-102389.stderr @@ -8,7 +8,10 @@ note: if `Enum` implemented `Clone`, you could clone the value --> $DIR/issue-102389.rs:1:1 | LL | enum Enum { A, B, C } - | ^^^^^^^^^ + | ^^^^^^^^^ consider implementing `Clone` for this type +... +LL | array[*inbounds as usize] + | --------- you could clone this value error: aborting due to 1 previous error diff --git a/tests/ui/moves/borrow-closures-instead-of-move.rs b/tests/ui/moves/borrow-closures-instead-of-move.rs index 51771ced7f22f..e4bca54e995fa 100644 --- a/tests/ui/moves/borrow-closures-instead-of-move.rs +++ b/tests/ui/moves/borrow-closures-instead-of-move.rs @@ -1,4 +1,4 @@ -fn takes_fn(f: impl Fn()) { +fn takes_fn(f: impl Fn()) { //~ HELP if `impl Fn()` implemented `Clone` loop { takes_fnonce(f); //~^ ERROR use of moved value @@ -6,7 +6,7 @@ fn takes_fn(f: impl Fn()) { } } -fn takes_fn_mut(m: impl FnMut()) { +fn takes_fn_mut(m: impl FnMut()) { //~ HELP if `impl FnMut()` implemented `Clone` if maybe() { takes_fnonce(m); //~^ HELP consider mutably borrowing diff --git a/tests/ui/moves/borrow-closures-instead-of-move.stderr b/tests/ui/moves/borrow-closures-instead-of-move.stderr index 9a84ddef7e64e..ab6ff417efb60 100644 --- a/tests/ui/moves/borrow-closures-instead-of-move.stderr +++ b/tests/ui/moves/borrow-closures-instead-of-move.stderr @@ -15,6 +15,14 @@ LL | fn takes_fnonce(_: impl FnOnce()) {} | ------------ ^^^^^^^^^^^^^ this parameter takes ownership of the value | | | in this function +help: if `impl Fn()` implemented `Clone`, you could clone the value + --> $DIR/borrow-closures-instead-of-move.rs:1:16 + | +LL | fn takes_fn(f: impl Fn()) { + | ^^^^^^^^^ consider constraining this type parameter with `Clone` +LL | loop { +LL | takes_fnonce(f); + | - you could clone this value help: consider borrowing `f` | LL | takes_fnonce(&f); @@ -39,6 +47,14 @@ LL | fn takes_fnonce(_: impl FnOnce()) {} | ------------ ^^^^^^^^^^^^^ this parameter takes ownership of the value | | | in this function +help: if `impl FnMut()` implemented `Clone`, you could clone the value + --> $DIR/borrow-closures-instead-of-move.rs:9:20 + | +LL | fn takes_fn_mut(m: impl FnMut()) { + | ^^^^^^^^^^^^ consider constraining this type parameter with `Clone` +LL | if maybe() { +LL | takes_fnonce(m); + | - you could clone this value help: consider mutably borrowing `m` | LL | takes_fnonce(&mut m); diff --git a/tests/ui/moves/issue-72649-uninit-in-loop.rs b/tests/ui/moves/issue-72649-uninit-in-loop.rs index 86f389cb3af1e..8f2e01bdf1aba 100644 --- a/tests/ui/moves/issue-72649-uninit-in-loop.rs +++ b/tests/ui/moves/issue-72649-uninit-in-loop.rs @@ -7,6 +7,10 @@ struct NonCopy; //~| NOTE if `NonCopy` implemented `Clone` //~| NOTE if `NonCopy` implemented `Clone` //~| NOTE if `NonCopy` implemented `Clone` +//~| NOTE consider implementing `Clone` for this type +//~| NOTE consider implementing `Clone` for this type +//~| NOTE consider implementing `Clone` for this type +//~| NOTE consider implementing `Clone` for this type fn good() { loop { @@ -21,6 +25,7 @@ fn moved_here_1() { //~^ NOTE move occurs because `value` has type `NonCopy`, which does not implement the `Copy` trait let _used = value; //~^ NOTE value moved here + //~| NOTE you could clone this value let _used2 = value; //~ ERROR use of moved value: `value` //~^ NOTE value used here after move } @@ -32,6 +37,7 @@ fn moved_here_2() { loop { //~ NOTE inside of this loop let _used = value; //~^ NOTE value moved here + //~| NOTE you could clone this value loop { let _used2 = value; //~ ERROR use of moved value: `value` //~^ NOTE value used here after move @@ -45,6 +51,7 @@ fn moved_loop_1() { loop { //~ NOTE inside of this loop let _used = value; //~ ERROR use of moved value: `value` //~^ NOTE value moved here, in previous iteration of loop + //~| NOTE you could clone this value } } @@ -56,6 +63,7 @@ fn moved_loop_2() { loop { //~ NOTE inside of this loop let _used2 = value; //~ ERROR use of moved value: `value` //~^ NOTE value moved here, in previous iteration of loop + //~| NOTE you could clone this value } } diff --git a/tests/ui/moves/issue-72649-uninit-in-loop.stderr b/tests/ui/moves/issue-72649-uninit-in-loop.stderr index a613f35a35e0a..3a93769ac4549 100644 --- a/tests/ui/moves/issue-72649-uninit-in-loop.stderr +++ b/tests/ui/moves/issue-72649-uninit-in-loop.stderr @@ -1,12 +1,12 @@ error[E0382]: use of moved value: `value` - --> $DIR/issue-72649-uninit-in-loop.rs:24:22 + --> $DIR/issue-72649-uninit-in-loop.rs:29:22 | LL | let value = NonCopy{}; | ----- move occurs because `value` has type `NonCopy`, which does not implement the `Copy` trait LL | LL | let _used = value; | ----- value moved here -LL | +... LL | let _used2 = value; | ^^^^^ value used here after move | @@ -14,10 +14,13 @@ note: if `NonCopy` implemented `Clone`, you could clone the value --> $DIR/issue-72649-uninit-in-loop.rs:5:1 | LL | struct NonCopy; - | ^^^^^^^^^^^^^^ + | ^^^^^^^^^^^^^^ consider implementing `Clone` for this type +... +LL | let _used = value; + | ----- you could clone this value error[E0382]: use of moved value: `value` - --> $DIR/issue-72649-uninit-in-loop.rs:36:26 + --> $DIR/issue-72649-uninit-in-loop.rs:42:26 | LL | let value = NonCopy{}; | ----- move occurs because `value` has type `NonCopy`, which does not implement the `Copy` trait @@ -34,10 +37,13 @@ note: if `NonCopy` implemented `Clone`, you could clone the value --> $DIR/issue-72649-uninit-in-loop.rs:5:1 | LL | struct NonCopy; - | ^^^^^^^^^^^^^^ + | ^^^^^^^^^^^^^^ consider implementing `Clone` for this type +... +LL | let _used = value; + | ----- you could clone this value error[E0382]: use of moved value: `value` - --> $DIR/issue-72649-uninit-in-loop.rs:46:21 + --> $DIR/issue-72649-uninit-in-loop.rs:52:21 | LL | let value = NonCopy{}; | ----- move occurs because `value` has type `NonCopy`, which does not implement the `Copy` trait @@ -51,10 +57,13 @@ note: if `NonCopy` implemented `Clone`, you could clone the value --> $DIR/issue-72649-uninit-in-loop.rs:5:1 | LL | struct NonCopy; - | ^^^^^^^^^^^^^^ + | ^^^^^^^^^^^^^^ consider implementing `Clone` for this type +... +LL | let _used = value; + | ----- you could clone this value error[E0382]: use of moved value: `value` - --> $DIR/issue-72649-uninit-in-loop.rs:57:22 + --> $DIR/issue-72649-uninit-in-loop.rs:64:22 | LL | let mut value = NonCopy{}; | --------- move occurs because `value` has type `NonCopy`, which does not implement the `Copy` trait @@ -68,10 +77,13 @@ note: if `NonCopy` implemented `Clone`, you could clone the value --> $DIR/issue-72649-uninit-in-loop.rs:5:1 | LL | struct NonCopy; - | ^^^^^^^^^^^^^^ + | ^^^^^^^^^^^^^^ consider implementing `Clone` for this type +... +LL | let _used2 = value; + | ----- you could clone this value error[E0381]: used binding `value` isn't initialized - --> $DIR/issue-72649-uninit-in-loop.rs:65:21 + --> $DIR/issue-72649-uninit-in-loop.rs:73:21 | LL | let value: NonCopy; | ----- binding declared here but left uninitialized @@ -84,7 +96,7 @@ LL | let value: NonCopy = /* value */; | +++++++++++++ error[E0381]: used binding `value` isn't initialized - --> $DIR/issue-72649-uninit-in-loop.rs:73:21 + --> $DIR/issue-72649-uninit-in-loop.rs:81:21 | LL | let mut value: NonCopy; | --------- binding declared here but left uninitialized diff --git a/tests/ui/moves/issue-75904-move-closure-loop.stderr b/tests/ui/moves/issue-75904-move-closure-loop.stderr index b6ad906bbdb09..815e91b0f4df2 100644 --- a/tests/ui/moves/issue-75904-move-closure-loop.stderr +++ b/tests/ui/moves/issue-75904-move-closure-loop.stderr @@ -15,7 +15,10 @@ note: if `NotCopy` implemented `Clone`, you could clone the value --> $DIR/issue-75904-move-closure-loop.rs:5:1 | LL | struct NotCopy; - | ^^^^^^^^^^^^^^ + | ^^^^^^^^^^^^^^ consider implementing `Clone` for this type +... +LL | a; + | - you could clone this value error: aborting due to 1 previous error diff --git a/tests/ui/moves/move-fn-self-receiver.stderr b/tests/ui/moves/move-fn-self-receiver.stderr index e6bf52276ac2f..f2c6008d27eac 100644 --- a/tests/ui/moves/move-fn-self-receiver.stderr +++ b/tests/ui/moves/move-fn-self-receiver.stderr @@ -106,7 +106,10 @@ note: if `Foo` implemented `Clone`, you could clone the value --> $DIR/move-fn-self-receiver.rs:5:1 | LL | struct Foo; - | ^^^^^^^^^^ + | ^^^^^^^^^^ consider implementing `Clone` for this type +... +LL | let ret = mut_foo.use_mut_self(); + | ------- you could clone this value error[E0382]: use of moved value: `rc_foo` --> $DIR/move-fn-self-receiver.rs:55:5 @@ -142,7 +145,10 @@ note: if `Foo` implemented `Clone`, you could clone the value --> $DIR/move-fn-self-receiver.rs:5:1 | LL | struct Foo; - | ^^^^^^^^^^ + | ^^^^^^^^^^ consider implementing `Clone` for this type +... +LL | foo_add + Foo; + | ------- you could clone this value note: calling this operator moves the left-hand side --> $SRC_DIR/core/src/ops/arith.rs:LL:COL diff --git a/tests/ui/moves/move-out-of-array-1.stderr b/tests/ui/moves/move-out-of-array-1.stderr index 9e4a08e0cef54..8a030f0219207 100644 --- a/tests/ui/moves/move-out-of-array-1.stderr +++ b/tests/ui/moves/move-out-of-array-1.stderr @@ -11,7 +11,10 @@ note: if `D` implemented `Clone`, you could clone the value --> $DIR/move-out-of-array-1.rs:5:1 | LL | struct D { _x: u8 } - | ^^^^^^^^ + | ^^^^^^^^ consider implementing `Clone` for this type +... +LL | a[i] + | ---- you could clone this value error: aborting due to 1 previous error diff --git a/tests/ui/moves/moves-based-on-type-no-recursive-stack-closure.stderr b/tests/ui/moves/moves-based-on-type-no-recursive-stack-closure.stderr index 4759b45892cc4..a8473bb81983d 100644 --- a/tests/ui/moves/moves-based-on-type-no-recursive-stack-closure.stderr +++ b/tests/ui/moves/moves-based-on-type-no-recursive-stack-closure.stderr @@ -17,6 +17,13 @@ LL | let mut r = R {c: Box::new(f)}; LL | f(&mut r, false) | ^ value borrowed here after move | +help: if `F` implemented `Clone`, you could clone the value + --> $DIR/moves-based-on-type-no-recursive-stack-closure.rs:30:16 + | +LL | fn conspirator(mut f: F) where F: FnMut(&mut R, bool) { + | ^ consider constraining this type parameter with `Clone` +LL | let mut r = R {c: Box::new(f)}; + | - you could clone this value help: consider mutably borrowing `f` | LL | let mut r = R {c: Box::new(&mut f)}; diff --git a/tests/ui/moves/use_of_moved_value_copy_suggestions.fixed b/tests/ui/moves/use_of_moved_value_copy_suggestions.fixed index e726c8145c3ba..bfb855c7fb1f4 100644 --- a/tests/ui/moves/use_of_moved_value_copy_suggestions.fixed +++ b/tests/ui/moves/use_of_moved_value_copy_suggestions.fixed @@ -3,6 +3,7 @@ fn duplicate_t(t: T) -> (T, T) { //~^ HELP consider restricting type parameter `T` + //~| HELP if `T` implemented `Clone`, you could clone the value (t, t) //~ use of moved value: `t` } @@ -72,10 +73,11 @@ where #[rustfmt::skip] fn existing_colon(t: T) { //~^ HELP consider restricting type parameter `T` + //~| HELP if `T` implemented `Clone`, you could clone the value [t, t]; //~ use of moved value: `t` } -fn existing_colon_in_where(t: T) +fn existing_colon_in_where(t: T) //~ HELP if `T` implemented `Clone`, you could clone the value where T:, T: Copy //~^ HELP consider further restricting type parameter `T` diff --git a/tests/ui/moves/use_of_moved_value_copy_suggestions.rs b/tests/ui/moves/use_of_moved_value_copy_suggestions.rs index ee08ce0fa5ba4..fbe5a1d74c372 100644 --- a/tests/ui/moves/use_of_moved_value_copy_suggestions.rs +++ b/tests/ui/moves/use_of_moved_value_copy_suggestions.rs @@ -3,6 +3,7 @@ fn duplicate_t(t: T) -> (T, T) { //~^ HELP consider restricting type parameter `T` + //~| HELP if `T` implemented `Clone`, you could clone the value (t, t) //~ use of moved value: `t` } @@ -72,10 +73,11 @@ where #[rustfmt::skip] fn existing_colon(t: T) { //~^ HELP consider restricting type parameter `T` + //~| HELP if `T` implemented `Clone`, you could clone the value [t, t]; //~ use of moved value: `t` } -fn existing_colon_in_where(t: T) +fn existing_colon_in_where(t: T) //~ HELP if `T` implemented `Clone`, you could clone the value where T:, //~^ HELP consider further restricting type parameter `T` diff --git a/tests/ui/moves/use_of_moved_value_copy_suggestions.stderr b/tests/ui/moves/use_of_moved_value_copy_suggestions.stderr index 3e37fcb2141fc..c03204c7b9f10 100644 --- a/tests/ui/moves/use_of_moved_value_copy_suggestions.stderr +++ b/tests/ui/moves/use_of_moved_value_copy_suggestions.stderr @@ -1,21 +1,29 @@ error[E0382]: use of moved value: `t` - --> $DIR/use_of_moved_value_copy_suggestions.rs:6:9 + --> $DIR/use_of_moved_value_copy_suggestions.rs:7:9 | LL | fn duplicate_t(t: T) -> (T, T) { | - move occurs because `t` has type `T`, which does not implement the `Copy` trait -LL | +... LL | (t, t) | - ^ value used here after move | | | value moved here | +help: if `T` implemented `Clone`, you could clone the value + --> $DIR/use_of_moved_value_copy_suggestions.rs:4:16 + | +LL | fn duplicate_t(t: T) -> (T, T) { + | ^ consider constraining this type parameter with `Clone` +... +LL | (t, t) + | - you could clone this value help: consider restricting type parameter `T` | LL | fn duplicate_t(t: T) -> (T, T) { | ++++++ error[E0382]: use of moved value: `t` - --> $DIR/use_of_moved_value_copy_suggestions.rs:11:9 + --> $DIR/use_of_moved_value_copy_suggestions.rs:12:9 | LL | fn duplicate_opt(t: Option) -> (Option, Option) { | - move occurs because `t` has type `Option`, which does not implement the `Copy` trait @@ -31,7 +39,7 @@ LL | fn duplicate_opt(t: Option) -> (Option, Option) { | ++++++ error[E0382]: use of moved value: `t` - --> $DIR/use_of_moved_value_copy_suggestions.rs:16:9 + --> $DIR/use_of_moved_value_copy_suggestions.rs:17:9 | LL | fn duplicate_tup1(t: (T,)) -> ((T,), (T,)) { | - move occurs because `t` has type `(T,)`, which does not implement the `Copy` trait @@ -47,7 +55,7 @@ LL | fn duplicate_tup1(t: (T,)) -> ((T,), (T,)) { | ++++++ error[E0382]: use of moved value: `t` - --> $DIR/use_of_moved_value_copy_suggestions.rs:21:9 + --> $DIR/use_of_moved_value_copy_suggestions.rs:22:9 | LL | fn duplicate_tup2(t: (A, B)) -> ((A, B), (A, B)) { | - move occurs because `t` has type `(A, B)`, which does not implement the `Copy` trait @@ -63,7 +71,7 @@ LL | fn duplicate_tup2(t: (A, B)) -> ((A, B), (A, B)) { | ++++++ ++++++ error[E0382]: use of moved value: `t` - --> $DIR/use_of_moved_value_copy_suggestions.rs:26:9 + --> $DIR/use_of_moved_value_copy_suggestions.rs:27:9 | LL | fn duplicate_custom(t: S) -> (S, S) { | - move occurs because `t` has type `S`, which does not implement the `Copy` trait @@ -79,7 +87,7 @@ LL | fn duplicate_custom(t: S) -> (S, S) { | ++++++++++++++ error[E0382]: use of moved value: `t` - --> $DIR/use_of_moved_value_copy_suggestions.rs:44:9 + --> $DIR/use_of_moved_value_copy_suggestions.rs:45:9 | LL | fn duplicate_custom_1(t: S) -> (S, S) where { | - move occurs because `t` has type `S`, which does not implement the `Copy` trait @@ -95,7 +103,7 @@ LL | fn duplicate_custom_1(t: S) -> (S, S) where { | ++++++++++++++ error[E0382]: use of moved value: `t` - --> $DIR/use_of_moved_value_copy_suggestions.rs:52:9 + --> $DIR/use_of_moved_value_copy_suggestions.rs:53:9 | LL | fn duplicate_custom_2(t: S) -> (S, S) | - move occurs because `t` has type `S`, which does not implement the `Copy` trait @@ -111,7 +119,7 @@ LL | T: A + Copy + Trait, | ++++++++++++++ error[E0382]: use of moved value: `t` - --> $DIR/use_of_moved_value_copy_suggestions.rs:61:9 + --> $DIR/use_of_moved_value_copy_suggestions.rs:62:9 | LL | fn duplicate_custom_3(t: S) -> (S, S) | - move occurs because `t` has type `S`, which does not implement the `Copy` trait @@ -127,7 +135,7 @@ LL | T: A + Copy + Trait, | ++++++++++++++ error[E0382]: use of moved value: `t` - --> $DIR/use_of_moved_value_copy_suggestions.rs:69:9 + --> $DIR/use_of_moved_value_copy_suggestions.rs:70:9 | LL | fn duplicate_custom_4(t: S) -> (S, S) | - move occurs because `t` has type `S`, which does not implement the `Copy` trait @@ -143,23 +151,31 @@ LL | fn duplicate_custom_4(t: S) -> (S, S) | ++++++++++++++ error[E0382]: use of moved value: `t` - --> $DIR/use_of_moved_value_copy_suggestions.rs:75:9 + --> $DIR/use_of_moved_value_copy_suggestions.rs:77:9 | LL | fn existing_colon(t: T) { | - move occurs because `t` has type `T`, which does not implement the `Copy` trait -LL | +... LL | [t, t]; | - ^ value used here after move | | | value moved here | +help: if `T` implemented `Clone`, you could clone the value + --> $DIR/use_of_moved_value_copy_suggestions.rs:74:19 + | +LL | fn existing_colon(t: T) { + | ^ consider constraining this type parameter with `Clone` +... +LL | [t, t]; + | - you could clone this value help: consider restricting type parameter `T` | LL | fn existing_colon(t: T) { | ++++ error[E0382]: use of moved value: `t` - --> $DIR/use_of_moved_value_copy_suggestions.rs:83:9 + --> $DIR/use_of_moved_value_copy_suggestions.rs:85:9 | LL | fn existing_colon_in_where(t: T) | - move occurs because `t` has type `T`, which does not implement the `Copy` trait @@ -169,6 +185,14 @@ LL | [t, t]; | | | value moved here | +help: if `T` implemented `Clone`, you could clone the value + --> $DIR/use_of_moved_value_copy_suggestions.rs:80:28 + | +LL | fn existing_colon_in_where(t: T) + | ^ consider constraining this type parameter with `Clone` +... +LL | [t, t]; + | - you could clone this value help: consider further restricting type parameter `T` | LL | T:, T: Copy diff --git a/tests/ui/nll/closure-borrow-spans.stderr b/tests/ui/nll/closure-borrow-spans.stderr index cac22c2ecda49..c466cad25d2e5 100644 --- a/tests/ui/nll/closure-borrow-spans.stderr +++ b/tests/ui/nll/closure-borrow-spans.stderr @@ -25,6 +25,8 @@ LL | f.use_ref(); error[E0597]: `x` does not live long enough --> $DIR/closure-borrow-spans.rs:19:16 | +LL | let x = 1; + | - binding `x` declared here LL | f = || x; | -- ^ borrowed value does not live long enough | | @@ -85,6 +87,8 @@ LL | f.use_ref(); error[E0597]: `x` does not live long enough --> $DIR/closure-borrow-spans.rs:52:16 | +LL | let mut x = 1; + | ----- binding `x` declared here LL | f = || x = 0; | -- ^ borrowed value does not live long enough | | @@ -145,6 +149,8 @@ LL | f.use_ref(); error[E0597]: `x` does not live long enough --> $DIR/closure-borrow-spans.rs:86:16 | +LL | let x = &mut z; + | - binding `x` declared here LL | f = || *x = 0; | -- ^^ borrowed value does not live long enough | | diff --git a/tests/ui/nll/closure-requirements/escape-upvar-nested.stderr b/tests/ui/nll/closure-requirements/escape-upvar-nested.stderr index aa73e91cc77e5..8e47ab780f210 100644 --- a/tests/ui/nll/closure-requirements/escape-upvar-nested.stderr +++ b/tests/ui/nll/closure-requirements/escape-upvar-nested.stderr @@ -37,6 +37,9 @@ LL | fn test() { error[E0597]: `y` does not live long enough --> $DIR/escape-upvar-nested.rs:21:40 | +LL | let y = 22; + | - binding `y` declared here +LL | LL | let mut closure = || { | -- value captured here LL | let mut closure1 = || p = &y; diff --git a/tests/ui/nll/closure-requirements/escape-upvar-ref.stderr b/tests/ui/nll/closure-requirements/escape-upvar-ref.stderr index 949dcc78703a7..c428150aa2f4c 100644 --- a/tests/ui/nll/closure-requirements/escape-upvar-ref.stderr +++ b/tests/ui/nll/closure-requirements/escape-upvar-ref.stderr @@ -23,6 +23,8 @@ LL | fn test() { error[E0597]: `y` does not live long enough --> $DIR/escape-upvar-ref.rs:23:35 | +LL | let y = 22; + | - binding `y` declared here LL | let mut closure = || p = &y; | -- ^ borrowed value does not live long enough | | diff --git a/tests/ui/nll/closure-requirements/propagate-multiple-requirements.stderr b/tests/ui/nll/closure-requirements/propagate-multiple-requirements.stderr index 81b5f09b04157..15f48d88c379b 100644 --- a/tests/ui/nll/closure-requirements/propagate-multiple-requirements.stderr +++ b/tests/ui/nll/closure-requirements/propagate-multiple-requirements.stderr @@ -1,6 +1,8 @@ error[E0597]: `local_arr` does not live long enough --> $DIR/propagate-multiple-requirements.rs:15:14 | +LL | let local_arr = other_local_arr; + | --------- binding `local_arr` declared here LL | let mut out: &mut &'static [i32] = &mut (&[1] as _); | ------------------- type annotation requires that `local_arr` is borrowed for `'static` LL | once(|mut z: &[i32], mut out_val: &mut &[i32]| { diff --git a/tests/ui/nll/issue-21232-partial-init-and-use.stderr b/tests/ui/nll/issue-21232-partial-init-and-use.stderr index 2aff375f0a77c..496a298a36ce9 100644 --- a/tests/ui/nll/issue-21232-partial-init-and-use.stderr +++ b/tests/ui/nll/issue-21232-partial-init-and-use.stderr @@ -32,7 +32,10 @@ note: if `S>` implemented `Clone`, you could clone the value --> $DIR/issue-21232-partial-init-and-use.rs:15:1 | LL | struct S { - | ^^^^^^^^^^^ + | ^^^^^^^^^^^ consider implementing `Clone` for this type +... +LL | let mut s: S = S::new(); drop(s); + | - you could clone this value error[E0382]: assign to part of moved value: `t` --> $DIR/issue-21232-partial-init-and-use.rs:116:5 @@ -83,7 +86,10 @@ note: if `S>` implemented `Clone`, you could clone the value --> $DIR/issue-21232-partial-init-and-use.rs:15:1 | LL | struct S { - | ^^^^^^^^^^^ + | ^^^^^^^^^^^ consider implementing `Clone` for this type +... +LL | let mut s: S = S::new(); drop(s); + | - you could clone this value error[E0382]: assign to part of moved value: `t` --> $DIR/issue-21232-partial-init-and-use.rs:142:5 diff --git a/tests/ui/nll/issue-27282-move-ref-mut-into-guard.fixed b/tests/ui/nll/issue-27282-move-ref-mut-into-guard.fixed new file mode 100644 index 0000000000000..7692be7ccc801 --- /dev/null +++ b/tests/ui/nll/issue-27282-move-ref-mut-into-guard.fixed @@ -0,0 +1,23 @@ +// Issue 27282: Example 1: This sidesteps the AST checks disallowing +// mutable borrows in match guards by hiding the mutable borrow in a +// guard behind a move (of the ref mut pattern id) within a closure. +//@ run-rustfix +#![feature(if_let_guard)] + +fn main() { + match Some(&4) { + None => {}, + ref mut foo + if { (|| { let mut bar = foo.clone(); bar.take() })(); false } => {}, + //~^ ERROR cannot move out of `foo` in pattern guard [E0507] + Some(s) => std::process::exit(*s), + } + + match Some(&4) { + None => {}, + ref mut foo + if let Some(()) = { (|| { let mut bar = foo.clone(); bar.take() })(); None } => {}, + //~^ ERROR cannot move out of `foo` in pattern guard [E0507] + Some(s) => std::process::exit(*s), + } +} diff --git a/tests/ui/nll/issue-27282-move-ref-mut-into-guard.rs b/tests/ui/nll/issue-27282-move-ref-mut-into-guard.rs index 833ca8afd618e..f3d0a184e03c5 100644 --- a/tests/ui/nll/issue-27282-move-ref-mut-into-guard.rs +++ b/tests/ui/nll/issue-27282-move-ref-mut-into-guard.rs @@ -1,14 +1,14 @@ // Issue 27282: Example 1: This sidesteps the AST checks disallowing // mutable borrows in match guards by hiding the mutable borrow in a // guard behind a move (of the ref mut pattern id) within a closure. - +//@ run-rustfix #![feature(if_let_guard)] fn main() { match Some(&4) { None => {}, ref mut foo - if { (|| { let bar = foo; bar.take() })(); false } => {}, + if { (|| { let mut bar = foo; bar.take() })(); false } => {}, //~^ ERROR cannot move out of `foo` in pattern guard [E0507] Some(s) => std::process::exit(*s), } @@ -16,7 +16,7 @@ fn main() { match Some(&4) { None => {}, ref mut foo - if let Some(()) = { (|| { let bar = foo; bar.take() })(); None } => {}, + if let Some(()) = { (|| { let mut bar = foo; bar.take() })(); None } => {}, //~^ ERROR cannot move out of `foo` in pattern guard [E0507] Some(s) => std::process::exit(*s), } diff --git a/tests/ui/nll/issue-27282-move-ref-mut-into-guard.stderr b/tests/ui/nll/issue-27282-move-ref-mut-into-guard.stderr index 4a512560c8751..7781e77894b89 100644 --- a/tests/ui/nll/issue-27282-move-ref-mut-into-guard.stderr +++ b/tests/ui/nll/issue-27282-move-ref-mut-into-guard.stderr @@ -1,22 +1,30 @@ error[E0507]: cannot move out of `foo` in pattern guard --> $DIR/issue-27282-move-ref-mut-into-guard.rs:11:19 | -LL | if { (|| { let bar = foo; bar.take() })(); false } => {}, - | ^^ --- move occurs because `foo` has type `&mut Option<&i32>`, which does not implement the `Copy` trait +LL | if { (|| { let mut bar = foo; bar.take() })(); false } => {}, + | ^^ --- move occurs because `foo` has type `&mut Option<&i32>`, which does not implement the `Copy` trait | | | `foo` is moved here | = note: variables bound in patterns cannot be moved from until after the end of the pattern guard +help: consider cloning the value if the performance cost is acceptable + | +LL | if { (|| { let mut bar = foo.clone(); bar.take() })(); false } => {}, + | ++++++++ error[E0507]: cannot move out of `foo` in pattern guard --> $DIR/issue-27282-move-ref-mut-into-guard.rs:19:34 | -LL | if let Some(()) = { (|| { let bar = foo; bar.take() })(); None } => {}, - | ^^ --- move occurs because `foo` has type `&mut Option<&i32>`, which does not implement the `Copy` trait +LL | if let Some(()) = { (|| { let mut bar = foo; bar.take() })(); None } => {}, + | ^^ --- move occurs because `foo` has type `&mut Option<&i32>`, which does not implement the `Copy` trait | | | `foo` is moved here | = note: variables bound in patterns cannot be moved from until after the end of the pattern guard +help: consider cloning the value if the performance cost is acceptable + | +LL | if let Some(()) = { (|| { let mut bar = foo.clone(); bar.take() })(); None } => {}, + | ++++++++ error: aborting due to 2 previous errors diff --git a/tests/ui/nll/issue-27282-mutation-in-guard.stderr b/tests/ui/nll/issue-27282-mutation-in-guard.stderr index 0b5d723172c76..f73e4aaa489aa 100644 --- a/tests/ui/nll/issue-27282-mutation-in-guard.stderr +++ b/tests/ui/nll/issue-27282-mutation-in-guard.stderr @@ -7,6 +7,10 @@ LL | (|| { let bar = foo; bar.take() })(); | `foo` is moved here | = note: variables bound in patterns cannot be moved from until after the end of the pattern guard +help: consider cloning the value if the performance cost is acceptable + | +LL | (|| { let bar = foo.clone(); bar.take() })(); + | ++++++++ error[E0507]: cannot move out of `foo` in pattern guard --> $DIR/issue-27282-mutation-in-guard.rs:20:18 @@ -17,6 +21,10 @@ LL | (|| { let bar = foo; bar.take() })(); | `foo` is moved here | = note: variables bound in patterns cannot be moved from until after the end of the pattern guard +help: consider cloning the value if the performance cost is acceptable + | +LL | (|| { let bar = foo.clone(); bar.take() })(); + | ++++++++ error: aborting due to 2 previous errors diff --git a/tests/ui/nll/issue-42574-diagnostic-in-nested-closure.stderr b/tests/ui/nll/issue-42574-diagnostic-in-nested-closure.stderr index f7a525ee9b046..e3f44467550cd 100644 --- a/tests/ui/nll/issue-42574-diagnostic-in-nested-closure.stderr +++ b/tests/ui/nll/issue-42574-diagnostic-in-nested-closure.stderr @@ -11,6 +11,8 @@ LL | || doit(data); error[E0597]: `data` does not live long enough --> $DIR/issue-42574-diagnostic-in-nested-closure.rs:6:13 | +LL | fn doit(data: &'static mut ()) { + | ---- binding `data` declared here LL | || doit(data); | -- -----^^^^- | | | | diff --git a/tests/ui/nll/match-guards-always-borrow.fixed b/tests/ui/nll/match-guards-always-borrow.fixed new file mode 100644 index 0000000000000..56e743bf196a6 --- /dev/null +++ b/tests/ui/nll/match-guards-always-borrow.fixed @@ -0,0 +1,66 @@ +#![feature(if_let_guard)] +#![allow(unused_mut)] +//@ run-rustfix + +// Here is arielb1's basic example from rust-lang/rust#27282 +// that AST borrowck is flummoxed by: + +fn should_reject_destructive_mutate_in_guard() { + match Some(&4) { + None => {}, + ref mut foo if { + (|| { let mut bar = foo.clone(); bar.take() })(); + //~^ ERROR cannot move out of `foo` in pattern guard [E0507] + false } => { }, + Some(s) => std::process::exit(*s), + } + + match Some(&4) { + None => {}, + ref mut foo if let Some(()) = { + (|| { let mut bar = foo.clone(); bar.take() })(); + //~^ ERROR cannot move out of `foo` in pattern guard [E0507] + None } => { }, + Some(s) => std::process::exit(*s), + } +} + +// Here below is a case that needs to keep working: we only use the +// binding via immutable-borrow in the guard, and we mutate in the arm +// body. +fn allow_mutate_in_arm_body() { + match Some(&4) { + None => {}, + ref mut foo if foo.is_some() => { foo.take(); () } + Some(s) => std::process::exit(*s), + } + + match Some(&4) { + None => {}, + ref mut foo if let Some(_) = foo => { foo.take(); () } + Some(s) => std::process::exit(*s), + } +} + +// Here below is a case that needs to keep working: we only use the +// binding via immutable-borrow in the guard, and we move into the arm +// body. +fn allow_move_into_arm_body() { + match Some(&4) { + None => {}, + mut foo if foo.is_some() => { foo.unwrap(); () } + Some(s) => std::process::exit(*s), + } + + match Some(&4) { + None => {}, + mut foo if let Some(_) = foo => { foo.unwrap(); () } + Some(s) => std::process::exit(*s), + } +} + +fn main() { + should_reject_destructive_mutate_in_guard(); + allow_mutate_in_arm_body(); + allow_move_into_arm_body(); +} diff --git a/tests/ui/nll/match-guards-always-borrow.rs b/tests/ui/nll/match-guards-always-borrow.rs index ff63cc092734a..927d55c42a6e3 100644 --- a/tests/ui/nll/match-guards-always-borrow.rs +++ b/tests/ui/nll/match-guards-always-borrow.rs @@ -1,4 +1,6 @@ #![feature(if_let_guard)] +#![allow(unused_mut)] +//@ run-rustfix // Here is arielb1's basic example from rust-lang/rust#27282 // that AST borrowck is flummoxed by: @@ -7,7 +9,7 @@ fn should_reject_destructive_mutate_in_guard() { match Some(&4) { None => {}, ref mut foo if { - (|| { let bar = foo; bar.take() })(); + (|| { let mut bar = foo; bar.take() })(); //~^ ERROR cannot move out of `foo` in pattern guard [E0507] false } => { }, Some(s) => std::process::exit(*s), @@ -16,7 +18,7 @@ fn should_reject_destructive_mutate_in_guard() { match Some(&4) { None => {}, ref mut foo if let Some(()) = { - (|| { let bar = foo; bar.take() })(); + (|| { let mut bar = foo; bar.take() })(); //~^ ERROR cannot move out of `foo` in pattern guard [E0507] None } => { }, Some(s) => std::process::exit(*s), diff --git a/tests/ui/nll/match-guards-always-borrow.stderr b/tests/ui/nll/match-guards-always-borrow.stderr index afd853c403ee3..bb0c5bd4c9761 100644 --- a/tests/ui/nll/match-guards-always-borrow.stderr +++ b/tests/ui/nll/match-guards-always-borrow.stderr @@ -1,22 +1,30 @@ error[E0507]: cannot move out of `foo` in pattern guard - --> $DIR/match-guards-always-borrow.rs:10:14 + --> $DIR/match-guards-always-borrow.rs:12:14 | -LL | (|| { let bar = foo; bar.take() })(); - | ^^ --- move occurs because `foo` has type `&mut Option<&i32>`, which does not implement the `Copy` trait +LL | (|| { let mut bar = foo; bar.take() })(); + | ^^ --- move occurs because `foo` has type `&mut Option<&i32>`, which does not implement the `Copy` trait | | | `foo` is moved here | = note: variables bound in patterns cannot be moved from until after the end of the pattern guard +help: consider cloning the value if the performance cost is acceptable + | +LL | (|| { let mut bar = foo.clone(); bar.take() })(); + | ++++++++ error[E0507]: cannot move out of `foo` in pattern guard - --> $DIR/match-guards-always-borrow.rs:19:14 + --> $DIR/match-guards-always-borrow.rs:21:14 | -LL | (|| { let bar = foo; bar.take() })(); - | ^^ --- move occurs because `foo` has type `&mut Option<&i32>`, which does not implement the `Copy` trait +LL | (|| { let mut bar = foo; bar.take() })(); + | ^^ --- move occurs because `foo` has type `&mut Option<&i32>`, which does not implement the `Copy` trait | | | `foo` is moved here | = note: variables bound in patterns cannot be moved from until after the end of the pattern guard +help: consider cloning the value if the performance cost is acceptable + | +LL | (|| { let mut bar = foo.clone(); bar.take() })(); + | ++++++++ error: aborting due to 2 previous errors diff --git a/tests/ui/nll/move-errors.stderr b/tests/ui/nll/move-errors.stderr index 842ecaf524b47..d138412137959 100644 --- a/tests/ui/nll/move-errors.stderr +++ b/tests/ui/nll/move-errors.stderr @@ -8,7 +8,10 @@ note: if `A` implemented `Clone`, you could clone the value --> $DIR/move-errors.rs:1:1 | LL | struct A(String); - | ^^^^^^^^ + | ^^^^^^^^ consider implementing `Clone` for this type +... +LL | let b = *a; + | -- you could clone this value help: consider removing the dereference here | LL - let b = *a; @@ -28,7 +31,10 @@ note: if `A` implemented `Clone`, you could clone the value --> $DIR/move-errors.rs:1:1 | LL | struct A(String); - | ^^^^^^^^ + | ^^^^^^^^ consider implementing `Clone` for this type +... +LL | let b = a[0]; + | ---- you could clone this value help: consider borrowing here | LL | let b = &a[0]; @@ -44,7 +50,10 @@ note: if `A` implemented `Clone`, you could clone the value --> $DIR/move-errors.rs:1:1 | LL | struct A(String); - | ^^^^^^^^ + | ^^^^^^^^ consider implementing `Clone` for this type +... +LL | let s = **r; + | --- you could clone this value help: consider removing the dereference here | LL - let s = **r; @@ -61,7 +70,10 @@ note: if `A` implemented `Clone`, you could clone the value --> $DIR/move-errors.rs:1:1 | LL | struct A(String); - | ^^^^^^^^ + | ^^^^^^^^ consider implementing `Clone` for this type +... +LL | let s = *r; + | -- you could clone this value help: consider removing the dereference here | LL - let s = *r; @@ -81,7 +93,10 @@ note: if `A` implemented `Clone`, you could clone the value --> $DIR/move-errors.rs:1:1 | LL | struct A(String); - | ^^^^^^^^ + | ^^^^^^^^ consider implementing `Clone` for this type +... +LL | let a = [A("".to_string())][0]; + | ---------------------- you could clone this value help: consider borrowing here | LL | let a = &[A("".to_string())][0]; @@ -126,7 +141,10 @@ note: if `A` implemented `Clone`, you could clone the value --> $DIR/move-errors.rs:1:1 | LL | struct A(String); - | ^^^^^^^^ + | ^^^^^^^^ consider implementing `Clone` for this type +... +LL | b = *a; + | -- you could clone this value error[E0508]: cannot move out of type `[B; 1]`, a non-copy array --> $DIR/move-errors.rs:74:11 diff --git a/tests/ui/nll/polonius/location-insensitive-scopes-issue-117146.nll.stderr b/tests/ui/nll/polonius/location-insensitive-scopes-issue-117146.nll.stderr index 5227ca8ec17d8..1d086c658dfcd 100644 --- a/tests/ui/nll/polonius/location-insensitive-scopes-issue-117146.nll.stderr +++ b/tests/ui/nll/polonius/location-insensitive-scopes-issue-117146.nll.stderr @@ -1,6 +1,8 @@ error[E0597]: `a` does not live long enough --> $DIR/location-insensitive-scopes-issue-117146.rs:10:18 | +LL | let a = (); + | - binding `a` declared here LL | let b = |_| &a; | --- -^ | | || diff --git a/tests/ui/nll/polonius/location-insensitive-scopes-issue-117146.polonius.stderr b/tests/ui/nll/polonius/location-insensitive-scopes-issue-117146.polonius.stderr index 5227ca8ec17d8..1d086c658dfcd 100644 --- a/tests/ui/nll/polonius/location-insensitive-scopes-issue-117146.polonius.stderr +++ b/tests/ui/nll/polonius/location-insensitive-scopes-issue-117146.polonius.stderr @@ -1,6 +1,8 @@ error[E0597]: `a` does not live long enough --> $DIR/location-insensitive-scopes-issue-117146.rs:10:18 | +LL | let a = (); + | - binding `a` declared here LL | let b = |_| &a; | --- -^ | | || diff --git a/tests/ui/nll/user-annotations/method-ufcs-1.stderr b/tests/ui/nll/user-annotations/method-ufcs-1.stderr index c7c08c948abdb..c42ea0172cf75 100644 --- a/tests/ui/nll/user-annotations/method-ufcs-1.stderr +++ b/tests/ui/nll/user-annotations/method-ufcs-1.stderr @@ -33,7 +33,9 @@ error[E0597]: `a` does not live long enough | LL | fn annot_reference_named_lifetime_in_closure<'a>(_: &'a u32) { | -- lifetime `'a` defined here -... +LL | let a = 22; + | - binding `a` declared here +LL | let b = 44; LL | let _closure = || { | -- value captured here LL | let c = 66; diff --git a/tests/ui/nll/user-annotations/method-ufcs-2.stderr b/tests/ui/nll/user-annotations/method-ufcs-2.stderr index b7861a3bd069f..287337c7d52d3 100644 --- a/tests/ui/nll/user-annotations/method-ufcs-2.stderr +++ b/tests/ui/nll/user-annotations/method-ufcs-2.stderr @@ -34,7 +34,9 @@ error[E0597]: `b` does not live long enough | LL | fn annot_reference_named_lifetime_in_closure<'a>(_: &'a u32) { | -- lifetime `'a` defined here -... +LL | let a = 22; +LL | let b = 44; + | - binding `b` declared here LL | let _closure = || { | -- value captured here LL | let c = 66; diff --git a/tests/ui/pattern/bindings-after-at/borrowck-pat-ref-mut-and-ref.stderr b/tests/ui/pattern/bindings-after-at/borrowck-pat-ref-mut-and-ref.stderr index 00964cb8336ed..e925fe78f3393 100644 --- a/tests/ui/pattern/bindings-after-at/borrowck-pat-ref-mut-and-ref.stderr +++ b/tests/ui/pattern/bindings-after-at/borrowck-pat-ref-mut-and-ref.stderr @@ -337,7 +337,10 @@ note: if `U` implemented `Clone`, you could clone the value --> $DIR/borrowck-pat-ref-mut-and-ref.rs:17:5 | LL | struct U; - | ^^^^^^^^ + | ^^^^^^^^ consider implementing `Clone` for this type +... +LL | ref a @ Ok(ref mut b) | ref a @ Err(ref mut b) if { drop(b); false } => {} + | - you could clone this value error[E0507]: cannot move out of `b` in pattern guard --> $DIR/borrowck-pat-ref-mut-and-ref.rs:103:66 @@ -350,7 +353,10 @@ note: if `U` implemented `Clone`, you could clone the value --> $DIR/borrowck-pat-ref-mut-and-ref.rs:17:5 | LL | struct U; - | ^^^^^^^^ + | ^^^^^^^^ consider implementing `Clone` for this type +... +LL | ref a @ Ok(ref mut b) | ref a @ Err(ref mut b) if { drop(b); false } => {} + | - you could clone this value = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no` error[E0507]: cannot move out of `a` in pattern guard diff --git a/tests/ui/regions/regions-addr-of-upvar-self.stderr b/tests/ui/regions/regions-addr-of-upvar-self.stderr index c16a6f8585b69..3a028cc9e211c 100644 --- a/tests/ui/regions/regions-addr-of-upvar-self.stderr +++ b/tests/ui/regions/regions-addr-of-upvar-self.stderr @@ -20,6 +20,8 @@ LL | let p: &'static mut usize = &mut self.food; error[E0597]: `self` does not live long enough --> $DIR/regions-addr-of-upvar-self.rs:8:46 | +LL | pub fn chase_cat(&mut self) { + | --------- binding `self` declared here LL | let _f = || { | -- value captured here LL | let p: &'static mut usize = &mut self.food; diff --git a/tests/ui/regions/regions-nested-fns-2.stderr b/tests/ui/regions/regions-nested-fns-2.stderr index 254497639a179..02359fe1213d8 100644 --- a/tests/ui/regions/regions-nested-fns-2.stderr +++ b/tests/ui/regions/regions-nested-fns-2.stderr @@ -1,6 +1,9 @@ error[E0597]: `y` does not live long enough --> $DIR/regions-nested-fns-2.rs:7:25 | +LL | let y = 3; + | - binding `y` declared here +LL | ignore( LL | |z| { | --- value captured here LL | if false { &y } else { z } diff --git a/tests/ui/regions/regions-nested-fns.stderr b/tests/ui/regions/regions-nested-fns.stderr index ee43f9fa5724d..23b3f78dd4eb5 100644 --- a/tests/ui/regions/regions-nested-fns.stderr +++ b/tests/ui/regions/regions-nested-fns.stderr @@ -27,6 +27,9 @@ LL | } error[E0597]: `y` does not live long enough --> $DIR/regions-nested-fns.rs:10:15 | +LL | let y = 3; + | - binding `y` declared here +... LL | ignore:: FnMut(&'z isize)>>(Box::new(|z| { | --- value captured here LL | ay = x; diff --git a/tests/ui/regions/regions-steal-closure.stderr b/tests/ui/regions/regions-steal-closure.stderr index 9324eb892a67d..50068b32fa3a7 100644 --- a/tests/ui/regions/regions-steal-closure.stderr +++ b/tests/ui/regions/regions-steal-closure.stderr @@ -4,6 +4,7 @@ error[E0597]: `i` does not live long enough LL | let mut cl_box = { | ---------- borrow later stored here LL | let mut i = 3; + | ----- binding `i` declared here LL | box_it(Box::new(|| i += 1)) | -- ^ borrowed value does not live long enough | | diff --git a/tests/ui/span/send-is-not-static-ensures-scoping.stderr b/tests/ui/span/send-is-not-static-ensures-scoping.stderr index bae0befcacaa7..c15547e84125b 100644 --- a/tests/ui/span/send-is-not-static-ensures-scoping.stderr +++ b/tests/ui/span/send-is-not-static-ensures-scoping.stderr @@ -16,6 +16,9 @@ error[E0597]: `y` does not live long enough | LL | let bad = { | --- borrow later stored here +LL | let x = 1; +LL | let y = &x; + | - binding `y` declared here ... LL | scoped(|| { | -- value captured here diff --git a/tests/ui/suggestions/option-content-move2.rs b/tests/ui/suggestions/option-content-move2.rs index 88e8a5b7aeef0..b0104d9bafb79 100644 --- a/tests/ui/suggestions/option-content-move2.rs +++ b/tests/ui/suggestions/option-content-move2.rs @@ -1,8 +1,10 @@ struct NotCopyable; +#[derive(Clone)] +struct NotCopyableButCloneable; fn func H, H: FnMut()>(_: F) {} -fn parse() { +fn foo() { let mut var = None; func(|| { // Shouldn't suggest `move ||.as_ref()` here @@ -12,5 +14,15 @@ fn parse() { } }); } +fn bar() { + let mut var = None; + func(|| { + // Shouldn't suggest `move ||.as_ref()` nor to `clone()` here + move || { + //~^ ERROR: cannot move out of `var` + var = Some(NotCopyableButCloneable); + } + }); +} fn main() {} diff --git a/tests/ui/suggestions/option-content-move2.stderr b/tests/ui/suggestions/option-content-move2.stderr index 0297c031eccaf..be97cba17b900 100644 --- a/tests/ui/suggestions/option-content-move2.stderr +++ b/tests/ui/suggestions/option-content-move2.stderr @@ -1,5 +1,5 @@ error[E0507]: cannot move out of `var`, a captured variable in an `FnMut` closure - --> $DIR/option-content-move2.rs:9:9 + --> $DIR/option-content-move2.rs:11:9 | LL | let mut var = None; | ------- captured outer variable @@ -15,6 +15,23 @@ LL | var = Some(NotCopyable); | variable moved due to use in closure | move occurs because `var` has type `Option`, which does not implement the `Copy` trait -error: aborting due to 1 previous error +error[E0507]: cannot move out of `var`, a captured variable in an `FnMut` closure + --> $DIR/option-content-move2.rs:21:9 + | +LL | let mut var = None; + | ------- captured outer variable +LL | func(|| { + | -- captured by this `FnMut` closure +LL | // Shouldn't suggest `move ||.as_ref()` nor to `clone()` here +LL | move || { + | ^^^^^^^ `var` is moved here +LL | +LL | var = Some(NotCopyableButCloneable); + | --- + | | + | variable moved due to use in closure + | move occurs because `var` has type `Option`, which does not implement the `Copy` trait + +error: aborting due to 2 previous errors For more information about this error, try `rustc --explain E0507`. diff --git a/tests/ui/suggestions/option-content-move3.rs b/tests/ui/suggestions/option-content-move3.rs new file mode 100644 index 0000000000000..a245309d97fdf --- /dev/null +++ b/tests/ui/suggestions/option-content-move3.rs @@ -0,0 +1,30 @@ +#[derive(Debug)] +struct NotCopyable; +#[derive(Debug, Clone)] +struct NotCopyableButCloneable; + +fn func H, H: FnMut()>(_: F) {} + +fn foo() { + let var = NotCopyable; + func(|| { + // Shouldn't suggest `move ||.as_ref()` here + move || { //~ ERROR cannot move out of `var` + let x = var; //~ ERROR cannot move out of `var` + println!("{x:?}"); + } + }); +} + +fn bar() { + let var = NotCopyableButCloneable; + func(|| { + // Shouldn't suggest `move ||.as_ref()` here + move || { //~ ERROR cannot move out of `var` + let x = var; //~ ERROR cannot move out of `var` + println!("{x:?}"); + } + }); +} + +fn main() {} diff --git a/tests/ui/suggestions/option-content-move3.stderr b/tests/ui/suggestions/option-content-move3.stderr new file mode 100644 index 0000000000000..a20dcce1ee310 --- /dev/null +++ b/tests/ui/suggestions/option-content-move3.stderr @@ -0,0 +1,95 @@ +error[E0507]: cannot move out of `var`, a captured variable in an `FnMut` closure + --> $DIR/option-content-move3.rs:13:21 + | +LL | let var = NotCopyable; + | --- captured outer variable +... +LL | move || { + | ------- captured by this `FnMut` closure +LL | let x = var; + | ^^^ move occurs because `var` has type `NotCopyable`, which does not implement the `Copy` trait + | +note: if `NotCopyable` implemented `Clone`, you could clone the value + --> $DIR/option-content-move3.rs:2:1 + | +LL | struct NotCopyable; + | ^^^^^^^^^^^^^^^^^^ consider implementing `Clone` for this type +... +LL | let x = var; + | --- you could clone this value +help: consider borrowing here + | +LL | let x = &var; + | + + +error[E0507]: cannot move out of `var`, a captured variable in an `FnMut` closure + --> $DIR/option-content-move3.rs:12:9 + | +LL | let var = NotCopyable; + | --- captured outer variable +LL | func(|| { + | -- captured by this `FnMut` closure +LL | // Shouldn't suggest `move ||.as_ref()` here +LL | move || { + | ^^^^^^^ `var` is moved here +LL | let x = var; + | --- + | | + | variable moved due to use in closure + | move occurs because `var` has type `NotCopyable`, which does not implement the `Copy` trait + | +note: if `NotCopyable` implemented `Clone`, you could clone the value + --> $DIR/option-content-move3.rs:2:1 + | +LL | struct NotCopyable; + | ^^^^^^^^^^^^^^^^^^ consider implementing `Clone` for this type +... +LL | let x = var; + | --- you could clone this value + +error[E0507]: cannot move out of `var`, a captured variable in an `FnMut` closure + --> $DIR/option-content-move3.rs:24:21 + | +LL | let var = NotCopyableButCloneable; + | --- captured outer variable +... +LL | move || { + | ------- captured by this `FnMut` closure +LL | let x = var; + | ^^^ move occurs because `var` has type `NotCopyableButCloneable`, which does not implement the `Copy` trait + | +help: consider borrowing here + | +LL | let x = &var; + | + + +error[E0507]: cannot move out of `var`, a captured variable in an `FnMut` closure + --> $DIR/option-content-move3.rs:23:9 + | +LL | let var = NotCopyableButCloneable; + | --- captured outer variable +LL | func(|| { + | -- captured by this `FnMut` closure +LL | // Shouldn't suggest `move ||.as_ref()` here +LL | move || { + | ^^^^^^^ `var` is moved here +LL | let x = var; + | --- + | | + | variable moved due to use in closure + | move occurs because `var` has type `NotCopyableButCloneable`, which does not implement the `Copy` trait + | +help: clone the value before moving it into the closure + | +LL ~ { +LL + let value = var.clone(); +LL ~ move || { +LL ~ let x = value; +LL | println!("{x:?}"); +LL ~ } +LL + } + | + +error: aborting due to 4 previous errors + +For more information about this error, try `rustc --explain E0507`. diff --git a/tests/ui/unboxed-closures/unboxed-closures-failed-recursive-fn-1.stderr b/tests/ui/unboxed-closures/unboxed-closures-failed-recursive-fn-1.stderr index 23aa18d7156ac..fc6f610ddd4c2 100644 --- a/tests/ui/unboxed-closures/unboxed-closures-failed-recursive-fn-1.stderr +++ b/tests/ui/unboxed-closures/unboxed-closures-failed-recursive-fn-1.stderr @@ -1,6 +1,9 @@ error[E0597]: `factorial` does not live long enough --> $DIR/unboxed-closures-failed-recursive-fn-1.rs:15:17 | +LL | let mut factorial: Option u32>> = None; + | ------------- binding `factorial` declared here +LL | LL | let f = |x: u32| -> u32 { | --------------- value captured here LL | let g = factorial.as_ref().unwrap(); @@ -30,7 +33,9 @@ error[E0597]: `factorial` does not live long enough --> $DIR/unboxed-closures-failed-recursive-fn-1.rs:28:17 | LL | let mut factorial: Option u32 + 'static>> = None; - | ----------------------------------------- type annotation requires that `factorial` is borrowed for `'static` + | ------------- ----------------------------------------- type annotation requires that `factorial` is borrowed for `'static` + | | + | binding `factorial` declared here LL | LL | let f = |x: u32| -> u32 { | --------------- value captured here diff --git a/tests/ui/union/union-borrow-move-parent-sibling.stderr b/tests/ui/union/union-borrow-move-parent-sibling.stderr index 782fa63280ed6..f8e9609cb1c5e 100644 --- a/tests/ui/union/union-borrow-move-parent-sibling.stderr +++ b/tests/ui/union/union-borrow-move-parent-sibling.stderr @@ -54,7 +54,10 @@ note: if `MockVec` implemented `Clone`, you could clone the value --> $DIR/union-borrow-move-parent-sibling.rs:25:1 | LL | struct MockVec { - | ^^^^^^^^^^^^^^^^^ + | ^^^^^^^^^^^^^^^^^ consider implementing `Clone` for this type +... +LL | let a = (u.x.0).0; + | --------- you could clone this value help: consider borrowing here | LL | let a = &(u.x.0).0; diff --git a/tests/ui/union/union-move.stderr b/tests/ui/union/union-move.stderr index 5ebb2716e5a06..d520fb00ea9d5 100644 --- a/tests/ui/union/union-move.stderr +++ b/tests/ui/union/union-move.stderr @@ -20,7 +20,10 @@ note: if `U1` implemented `Clone`, you could clone the value --> $DIR/union-move.rs:9:1 | LL | union U1 { - | ^^^^^^^^ + | ^^^^^^^^ consider implementing `Clone` for this type +... +LL | move_out(x.f1_nocopy); + | ----------- you could clone this value error[E0382]: use of moved value: `x` --> $DIR/union-move.rs:42:18 @@ -44,7 +47,10 @@ note: if `U1` implemented `Clone`, you could clone the value --> $DIR/union-move.rs:9:1 | LL | union U1 { - | ^^^^^^^^ + | ^^^^^^^^ consider implementing `Clone` for this type +... +LL | move_out(x.f2_nocopy); + | ----------- you could clone this value error[E0509]: cannot move out of type `U2`, which implements the `Drop` trait --> $DIR/union-move.rs:49:18 diff --git a/tests/ui/unop-move-semantics.stderr b/tests/ui/unop-move-semantics.stderr index 187dd66b2fe59..bc9b3ea990384 100644 --- a/tests/ui/unop-move-semantics.stderr +++ b/tests/ui/unop-move-semantics.stderr @@ -33,6 +33,14 @@ LL | !x; ... LL | use_mut(n); use_imm(m); | - borrow later used here + | +help: if `T` implemented `Clone`, you could clone the value + --> $DIR/unop-move-semantics.rs:11:18 + | +LL | fn move_borrowed>(x: T, mut y: T) { + | ^ consider constraining this type parameter with `Clone` +LL | let m = &x; + | -- you could clone this value error[E0505]: cannot move out of `y` because it is borrowed --> $DIR/unop-move-semantics.rs:17:6 @@ -47,6 +55,15 @@ LL | !y; | ^ move out of `y` occurs here LL | use_mut(n); use_imm(m); | - borrow later used here + | +help: if `T` implemented `Clone`, you could clone the value + --> $DIR/unop-move-semantics.rs:11:18 + | +LL | fn move_borrowed>(x: T, mut y: T) { + | ^ consider constraining this type parameter with `Clone` +LL | let m = &x; +LL | let n = &mut y; + | ------ you could clone this value error[E0507]: cannot move out of `*m` which is behind a mutable reference --> $DIR/unop-move-semantics.rs:24:6 @@ -59,6 +76,14 @@ LL | !*m; | note: calling this operator moves the value --> $SRC_DIR/core/src/ops/bit.rs:LL:COL +help: if `T` implemented `Clone`, you could clone the value + --> $DIR/unop-move-semantics.rs:20:24 + | +LL | fn illegal_dereference>(mut x: T, y: T) { + | ^ consider constraining this type parameter with `Clone` +... +LL | !*m; + | -- you could clone this value error[E0507]: cannot move out of `*n` which is behind a shared reference --> $DIR/unop-move-semantics.rs:26:6 @@ -68,6 +93,15 @@ LL | !*n; | || | |move occurs because `*n` has type `T`, which does not implement the `Copy` trait | `*n` moved due to usage in operator + | +help: if `T` implemented `Clone`, you could clone the value + --> $DIR/unop-move-semantics.rs:20:24 + | +LL | fn illegal_dereference>(mut x: T, y: T) { + | ^ consider constraining this type parameter with `Clone` +... +LL | !*n; + | -- you could clone this value error: aborting due to 5 previous errors diff --git a/tests/ui/variance/variance-issue-20533.stderr b/tests/ui/variance/variance-issue-20533.stderr index 4515d313ec0a4..03cada07a9e3d 100644 --- a/tests/ui/variance/variance-issue-20533.stderr +++ b/tests/ui/variance/variance-issue-20533.stderr @@ -14,7 +14,10 @@ note: if `AffineU32` implemented `Clone`, you could clone the value --> $DIR/variance-issue-20533.rs:26:1 | LL | struct AffineU32(u32); - | ^^^^^^^^^^^^^^^^ + | ^^^^^^^^^^^^^^^^ consider implementing `Clone` for this type +... +LL | let x = foo(&a); + | -- you could clone this value error[E0505]: cannot move out of `a` because it is borrowed --> $DIR/variance-issue-20533.rs:41:14 @@ -32,7 +35,10 @@ note: if `AffineU32` implemented `Clone`, you could clone the value --> $DIR/variance-issue-20533.rs:26:1 | LL | struct AffineU32(u32); - | ^^^^^^^^^^^^^^^^ + | ^^^^^^^^^^^^^^^^ consider implementing `Clone` for this type +... +LL | let x = bar(&a); + | -- you could clone this value error[E0505]: cannot move out of `a` because it is borrowed --> $DIR/variance-issue-20533.rs:47:14 @@ -50,7 +56,10 @@ note: if `AffineU32` implemented `Clone`, you could clone the value --> $DIR/variance-issue-20533.rs:26:1 | LL | struct AffineU32(u32); - | ^^^^^^^^^^^^^^^^ + | ^^^^^^^^^^^^^^^^ consider implementing `Clone` for this type +... +LL | let x = baz(&a); + | -- you could clone this value error[E0505]: cannot move out of `a` because it is borrowed --> $DIR/variance-issue-20533.rs:53:14