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@mu001999 mu001999 commented Jan 17, 2026

Fixes #151238

#146978 made parsing ident not always allowed-recovery (change), so when matching macro with NoopTracker, which has Recovery::Forbidden, ICE happens when trying to parse kw as ident and then unwraping it.

This PR introduces a new method for parsing ident with allowing recovery when trying to diagnose. Then errors will behave like previous.

r? @petrochenkov

@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 Jan 17, 2026
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@mu001999 mu001999 marked this pull request as draft January 17, 2026 14:38
@rustbot rustbot added S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Jan 17, 2026
@mu001999 mu001999 changed the title Allow recovery when matching macro Don't parse keyword as identifier when trying to diagnose in parameter_without_type Jan 17, 2026
@mu001999 mu001999 marked this pull request as ready for review January 17, 2026 14:54
@rustbot rustbot added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. and removed S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. labels Jan 17, 2026
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@mu001999 mu001999 changed the title Don't parse keyword as identifier when trying to diagnose in parameter_without_type Parse ident with allowing recovery when trying to recover in diagnosing Jan 17, 2026
@mu001999 mu001999 changed the title Parse ident with allowing recovery when trying to recover in diagnosing Parse ident with allowing recovery when trying diagnose Jan 17, 2026
@mu001999 mu001999 changed the title Parse ident with allowing recovery when trying diagnose Parse ident with allowing recovery when trying to diagnose Jan 17, 2026
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The recovered diagnostics sadly look a bit wonky, but still better than an ICE :(

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@bors r+

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rust-bors bot commented Jan 19, 2026

📌 Commit 3713512 has been approved by petrochenkov

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 Jan 19, 2026
rust-bors bot pushed a commit that referenced this pull request Jan 19, 2026
…uwer

Rollup of 15 pull requests

Successful merges:

 - #148623 (Ignore `#[doc(hidden)]` items when computing trimmed paths for printing)
 - #150550 (Miscellaneous cleanups to borrowck related code)
 - #150879 (Remove the diagnostic lints)
 - #150895 (rustc_errors: Add (heuristic) Syntax Highlighting for `rustc --explain`)
 - #150987 (remote-test-server: Fix header in batch mode)
 - #151004 (std: implement `sleep_until` on Apple platforms)
 - #151045 (Simplify some literal-value negations with `u128::wrapping_neg`)
 - #151119 (Support pointers in type reflection)
 - #151171 (Do not recover from `Trait()` if generic list is unterminated)
 - #151231 (HIR typeck cleanup: clarify and re-style `check_expr_unop`)
 - #151249 (Parse ident with allowing recovery when trying to diagnose)
 - #151295 (THIR patterns: Use `ty::Value` in more places throughout `const_to_pat`)
 - #151326 (Remove `DiagMessage::Translated` in favour of `DiagMessage::Str`)
 - #151361 (add test for issue 61463)
 - #151371 (Add `S-blocked` to `labels_blocking_approval`)

r? @ghost
@rust-bors rust-bors bot merged commit 8c5e10b into rust-lang:main Jan 20, 2026
11 checks passed
@rustbot rustbot added this to the 1.95.0 milestone Jan 20, 2026
rust-timer added a commit that referenced this pull request Jan 20, 2026
Rollup merge of #151249 - fix/151238, r=petrochenkov

Parse ident with allowing recovery when trying to diagnose

Fixes #151238

#146978 made parsing ident not always allowed-recovery ([change](https://github.com/rust-lang/rust/pull/146978/changes#diff-ef8d6186dc7fb1d03a71446d0c9e6cc9e72158ec6896703dcf05686ee7dc83fcL469-R469)), so when matching macro with `NoopTracker`, which has `Recovery::Forbidden`, ICE happens when trying to parse kw as ident and then unwraping it.

This PR introduces a new method for parsing ident with allowing recovery when trying to diagnose. Then errors will behave like previous.

r? @petrochenkov
github-actions bot pushed a commit to rust-lang/miri that referenced this pull request Jan 20, 2026
…uwer

Rollup of 15 pull requests

Successful merges:

 - rust-lang/rust#148623 (Ignore `#[doc(hidden)]` items when computing trimmed paths for printing)
 - rust-lang/rust#150550 (Miscellaneous cleanups to borrowck related code)
 - rust-lang/rust#150879 (Remove the diagnostic lints)
 - rust-lang/rust#150895 (rustc_errors: Add (heuristic) Syntax Highlighting for `rustc --explain`)
 - rust-lang/rust#150987 (remote-test-server: Fix header in batch mode)
 - rust-lang/rust#151004 (std: implement `sleep_until` on Apple platforms)
 - rust-lang/rust#151045 (Simplify some literal-value negations with `u128::wrapping_neg`)
 - rust-lang/rust#151119 (Support pointers in type reflection)
 - rust-lang/rust#151171 (Do not recover from `Trait()` if generic list is unterminated)
 - rust-lang/rust#151231 (HIR typeck cleanup: clarify and re-style `check_expr_unop`)
 - rust-lang/rust#151249 (Parse ident with allowing recovery when trying to diagnose)
 - rust-lang/rust#151295 (THIR patterns: Use `ty::Value` in more places throughout `const_to_pat`)
 - rust-lang/rust#151326 (Remove `DiagMessage::Translated` in favour of `DiagMessage::Str`)
 - rust-lang/rust#151361 (add test for issue 61463)
 - rust-lang/rust#151371 (Add `S-blocked` to `labels_blocking_approval`)

r? @ghost
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ICE: parse_expected_identifier_found_keyword_str

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