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Issues: rust-lang/rust

Draft release notes for 1.88.0
#141598 opened May 26, 2025 by Mark-Simulacrum
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Issues list

ICE: expand: unimplemented A-macros Area: All kinds of macros (custom derive, macro_rules!, proc macros, ..) C-bug Category: This is a bug. F-macro_metavar_expr `#![feature(macro_metavar_expr)]` I-ICE Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️ S-bug-has-test Status: This bug is tracked inside the repo by a `known-bug` test. S-has-bisection Status: A bisection has been found for this issue S-has-mcve Status: A Minimal Complete and Verifiable Example has been found for this issue T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#140479 opened Apr 29, 2025 by matthiaskrgr
3
Using ${index()} inside ${concat()} fails with "expected identifier or string literal" error A-macros Area: All kinds of macros (custom derive, macro_rules!, proc macros, ..) C-feature-request Category: A feature request, i.e: not implemented / a PR. F-macro_metavar_expr_concat `#![feature(macro_metavar_expr_concat)]` F-macro_metavar_expr `#![feature(macro_metavar_expr)]` T-lang Relevant to the language team, which will review and decide on the PR/issue.
#138181 opened Mar 7, 2025 by MonterraByte
1
Decide what we want about macro_metavar_expr C-discussion Category: Discussion or questions that doesn't represent real issues. F-macro_metavar_expr `#![feature(macro_metavar_expr)]` I-lang-radar Items that are on lang's radar and will need eventual work or consideration. T-lang Relevant to the language team, which will review and decide on the PR/issue.
#137581 opened Feb 25, 2025 by traviscross
1
${count()} disregards depth parameter when captured repetition is empty C-bug Category: This is a bug. F-macro_metavar_expr `#![feature(macro_metavar_expr)]` requires-nightly This issue requires a nightly compiler in some way.
#111905 opened May 24, 2023 by lowr
1
1
meta_variable_misuse trips on ${count($foo)} outside of a repetition A-diagnostics Area: Messages for errors, warnings, and lints A-macros Area: All kinds of macros (custom derive, macro_rules!, proc macros, ..) D-papercut Diagnostics: An error or lint that needs small tweaks. F-macro_metavar_expr `#![feature(macro_metavar_expr)]` T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#109245 opened Mar 17, 2023 by PatchMixolydic
Confusing error when metavariable expressions are used outside of reptitions A-diagnostics Area: Messages for errors, warnings, and lints F-macro_metavar_expr `#![feature(macro_metavar_expr)]` requires-nightly This issue requires a nightly compiler in some way. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
#96535 opened Apr 28, 2022 by repnop
2
Tracking Issue for RFC 3086: macro metavariable expressions B-RFC-approved Blocker: Approved by a merged RFC but not yet implemented. C-tracking-issue Category: An issue tracking the progress of sth. like the implementation of an RFC F-macro_metavar_expr `#![feature(macro_metavar_expr)]` S-tracking-design-concerns Status: There are blocking design concerns. T-lang Relevant to the language team, which will review and decide on the PR/issue.
#83527 opened Mar 26, 2021 by nikomatsakis
1 of 4 tasks
48
ProTip! Follow long discussions with comments:>50.