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Add regression test for rustc diagnostic to recognize variables in match guards - #161308

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Add regression test for rustc diagnostic to recognize variables in match guards#161308
KevinA-cpu wants to merge 1 commit into
rust-lang:mainfrom
KevinA-cpu:regression-test-80954

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@KevinA-cpu

@KevinA-cpu KevinA-cpu commented Aug 18, 2026

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closes #80954

@rustbot rustbot added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. labels Aug 18, 2026
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rustbot commented Aug 18, 2026

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Thanks for the pull request, and welcome! The Rust Project is excited to review your changes, and you should hear from @chenyukang (or someone else) some time within the next two weeks.

Please see the contribution instructions for more information. Namely, in order to ensure the minimum review times lag, PR authors and assigned reviewers should ensure that the review label (S-waiting-on-review and S-waiting-on-author) stays updated, invoking these commands when appropriate:

  • @rustbot author: the review is finished, PR author should check the comments and take action accordingly
  • @rustbot review: the author is ready for a review, this PR will be queued again in the reviewer's queue
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The reviewer was selected based on:

  • Owners of files modified in this PR: compiler
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  • Random selection from 16 candidates

@Nadrieril

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Hi and welcome! Thanks for taking the time to add this test, looks good to me.

r? me
@bors r+ rollup

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rust-bors Bot commented Aug 19, 2026

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📌 Commit d0225c6 has been approved by Nadrieril

It is now in the queue for this repository.

@rust-bors rust-bors Bot added S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Aug 19, 2026
JonathanBrouwer added a commit to JonathanBrouwer/rust that referenced this pull request Aug 19, 2026
…r=Nadrieril

Add regression test for rustc diagnostic to recognize variables in match guards

closes rust-lang#80954
rust-bors Bot pushed a commit that referenced this pull request Aug 19, 2026
…uwer

Rollup of 16 pull requests

Successful merges:

 - #159071 ([PAC] Encoder and hash (1/8))
 - #161277 (bootstrap: Move all non-module items out of the crate root)
 - #161332 (Some `GlobalCtxt`/`Session` cleanups)
 - #161344 (Update the `rustc-perf` submodule)
 - #150931 (rustdoc: Always document `#[repr(transparent)]` if `#[rustc_pub_transparent]` is applied)
 - #160582 (Add `remove hidden_glob_reexports item breaks downstream` test)
 - #160876 (remove unwrap from write_mir_fn_graphviz)
 - #160927 (Enhance EII UI tests)
 - #161070 (fix arm homogeneous aggregate ABI)
 - #161236 (Download auto jobs in citool in parallel)
 - #161254 (Reserve capacity for 3% anon nodes)
 - #161283 (Tighten the language used for documenting `TargetOptions::llvm_abiname`)
 - #161291 (Rename `ProjectionPredicate` and `TraitPredicate`)
 - #161299 (Remove a bunch of unnecessary explicit lifetimes)
 - #161307 (make ARM maintainers pingable)
 - #161308 (Add regression test for rustc diagnostic to recognize variables in match guards)
JonathanBrouwer added a commit to JonathanBrouwer/rust that referenced this pull request Aug 19, 2026
…r=Nadrieril

Add regression test for rustc diagnostic to recognize variables in match guards

closes rust-lang#80954
rust-bors Bot pushed a commit that referenced this pull request Aug 19, 2026
…uwer

Rollup of 16 pull requests

Successful merges:

 - #159071 ([PAC] Encoder and hash (1/8))
 - #161068 (Ensure TLS accesses don't call the global allocator through panic (part 3) )
 - #161332 (Some `GlobalCtxt`/`Session` cleanups)
 - #161344 (Update the `rustc-perf` submodule)
 - #150931 (rustdoc: Always document `#[repr(transparent)]` if `#[rustc_pub_transparent]` is applied)
 - #160582 (Add `remove hidden_glob_reexports item breaks downstream` test)
 - #160876 (remove unwrap from write_mir_fn_graphviz)
 - #160927 (Enhance EII UI tests)
 - #161070 (fix arm homogeneous aggregate ABI)
 - #161236 (Download auto jobs in citool in parallel)
 - #161254 (Reserve capacity for 3% anon nodes)
 - #161283 (Tighten the language used for documenting `TargetOptions::llvm_abiname`)
 - #161291 (Rename `ProjectionPredicate` and `TraitPredicate`)
 - #161299 (Remove a bunch of unnecessary explicit lifetimes)
 - #161307 (make ARM maintainers pingable)
 - #161308 (Add regression test for rustc diagnostic to recognize variables in match guards)
@KevinA-cpu

KevinA-cpu commented Aug 19, 2026

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@Nadrieril , no problem, and happy to contribute. Great softwares start from small things

JonathanBrouwer added a commit to JonathanBrouwer/rust that referenced this pull request Aug 19, 2026
…r=Nadrieril

Add regression test for rustc diagnostic to recognize variables in match guards

closes rust-lang#80954
JonathanBrouwer added a commit to JonathanBrouwer/rust that referenced this pull request Aug 20, 2026
…r=Nadrieril

Add regression test for rustc diagnostic to recognize variables in match guards

closes rust-lang#80954
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Successfully merging this pull request may close these issues.

Rustc diagnostics don’t realize that assignments from a match guard can be used in the following match arms.

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