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3.1.3-RC2 is not able to compile scala3-compiler from current main #14938

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Kordyjan opened this issue Apr 14, 2022 · 4 comments · Fixed by #14940
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3.1.3-RC2 is not able to compile scala3-compiler from current main #14938

Kordyjan opened this issue Apr 14, 2022 · 4 comments · Fixed by #14940
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@nicolasstucki
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itype:bug prio:blocker

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@Kordyjan
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Compiler version

3.1.3-RC2

Output

[error] -- [E007] Type Mismatch Error: /Users/pmarks/dotty/compiler/src/dotty/tools/dotc/core/tasty/TreeUnpickler.scala:126:18
[error] 126 |              |  $ex
[error]     |                  ^^
[error]     |                  Found:    (ex : Throwable)
[error]     |                  Required: dotty.tools.dotc.printing.Formatting.Shown
[error]     |
[error]     | longer explanation available when compiling with `-explain`
[error] one error found
[error] (scala3-compiler / Compile / compileIncremental) Compilation failed

Expectation

Stuff compiles!
@Kordyjan Kordyjan added itype:bug prio:blocker stat:needs minimization Needs a self contained minimization stat:needs triage Every issue needs to have an "area" and "itype" label labels Apr 14, 2022
@Kordyjan Kordyjan mentioned this issue Apr 14, 2022
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@nicolasstucki
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Probably introduced in #14455

@nicolasstucki nicolasstucki removed the stat:needs triage Every issue needs to have an "area" and "itype" label label Apr 14, 2022
@nicolasstucki
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We seem to be missing a given Show[Throwable] but we have one for Show[Exception].

https://github.com/lampepfl/dotty/pull/14455/files#diff-1aeccc1856f9265f1358bb106fe44428b9aa9b4d353bd1a85b5799a00e810b9cR69

nicolasstucki added a commit to dotty-staging/dotty that referenced this issue Apr 14, 2022
@nicolasstucki
Provide Show[Throwable]
7072aa9 
Fixes scala#14938
@nicolasstucki nicolasstucki mentioned this issue Apr 14, 2022
Merged
@nicolasstucki nicolasstucki removed the stat:needs minimization Needs a self contained minimization label Apr 14, 2022
@dwijnand
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How did this show up? The other community build?

@dwijnand
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Ah, #14934 I assume.

michelou pushed a commit to michelou/scala3 that referenced this issue Apr 25, 2022
@nicolasstucki @michelou
Provide Show[Throwable]
4bdcf27 
Fixes scala#14938
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Provide Show[Throwable] dotty-staging/dotty
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@dwijnand @nicolasstucki @Kordyjan