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Introduction of frontmatter was a theoretical breaking change (via <code>Literal::from_str</code>)

A-proc-macrosArea: Procedural macros Area: Procedural macros

C-bugCategory: This is a bug. Category: This is a bug.

F-frontmatter`#![feature(frontmatter)]` `#![feature(frontmatter)]`

I-prioritizeIssue: Indicates that prioritization has been requested for this issue. Issue: Indicates that prioritization has been requested for this issue.

regression-from-stable-to-stablePerformance or correctness regression from one stable version to another. Performance or correctness regression from one stable version to another.

T-compilerRelevant to the compiler team, which will review and decide on the PR/issue. Relevant to the compiler team, which will review and decide on the PR/issue.

Status: Open.

#146132 In rust-lang/rust;

· fmease opened on Sep 2, 2025

Reject invalid literal suffixes in tuple indexing, tuple struct indexing, and struct field name position

A-grammarArea: The grammar of Rust Area: The grammar of Rust

A-parserArea: The lexing & parsing of Rust source code to an AST Area: The lexing & parsing of Rust source code to an AST

A-proc-macrosArea: Procedural macros Area: Procedural macros

A-tidyArea: The tidy tool Area: The tidy tool

disposition-mergeThis issue / PR is in PFCP or FCP with a disposition to merge it. This issue / PR is in PFCP or FCP with a disposition to merge it.

final-comment-periodIn the final comment period and will be merged soon unless new substantive objections are raised. In the final comment period and will be merged soon unless new substantive objections are raised.

I-lang-nominatedNominated for discussion during a lang team meeting. Nominated for discussion during a lang team meeting.

I-lang-radarItems that are on lang's radar and will need eventual work or consideration. Items that are on lang's radar and will need eventual work or consideration.

needs-fcpThis change is insta-stable, or significant enough to need a team FCP to proceed. This change is insta-stable, or significant enough to need a team FCP to proceed.

P-lang-drag-1Lang team prioritization drag level 1. https://rust-lang.zulipchat.com/#narrow/channel/410516-t-lang Lang team prioritization drag level 1. https://rust-lang.zulipchat.com/#narrow/channel/410516-t-lang

S-waiting-on-teamStatus: Awaiting decision from the relevant subteam (see the T-<team> label). Status: Awaiting decision from the relevant subteam (see the T-<team> label).

T-langRelevant to the language team Relevant to the language team

Status: Open (in progress).

rust-lang/rustnumber 145463

#145463 In rust-lang/rust;

· jieyouxu opened on Aug 15, 2025

Proc-Macro-Diagnostics allow error subdiagnostics

A-diagnosticsArea: Messages for errors, warnings, and lints Area: Messages for errors, warnings, and lints

A-proc-macrosArea: Procedural macros Area: Procedural macros

C-bugCategory: This is a bug. Category: This is a bug.

F-proc_macro_diagnostic

I-ICEIssue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️ Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️

T-compilerRelevant to the compiler team, which will review and decide on the PR/issue. Relevant to the compiler team, which will review and decide on the PR/issue.

Status: Open.

#145305 In rust-lang/rust;

· stormofice opened on Aug 12, 2025

Attribute macro can replace item with expression.

A-attributesArea: Attributes (`#[...]`, `#![...]`) Area: Attributes (`#[...]`, `#![...]`)

A-macrosArea: All kinds of macros (custom derive, macro_rules!, proc macros, ..) Area: All kinds of macros (custom derive, macro_rules!, proc macros, ..)

A-proc-macrosArea: Procedural macros Area: Procedural macros

C-bugCategory: This is a bug. Category: This is a bug.

T-compilerRelevant to the compiler team, which will review and decide on the PR/issue. Relevant to the compiler team, which will review and decide on the PR/issue.

Status: Open.

#144716 In rust-lang/rust;

· theemathas opened on Jul 31, 2025

Cannot Use NoOp Procedural Macro as Custom Inner Attribute

A-attributesArea: Attributes (`#[...]`, `#![...]`) Area: Attributes (`#[...]`, `#![...]`)

A-proc-macrosArea: Procedural macros Area: Procedural macros

C-discussionCategory: Discussion or questions that doesn't represent real issues. Category: Discussion or questions that doesn't represent real issues.

Status: Open.

#143003 In rust-lang/rust;

· benwu25 opened on Jun 25, 2025

[proc-macro] Add possibility to generate a <code>Span</code> from a path representation

A-proc-macrosArea: Procedural macros Area: Procedural macros

C-feature-requestCategory: A feature request, i.e: not implemented / a PR. Category: A feature request, i.e: not implemented / a PR.

T-libs-apiRelevant to the library API team, which will review and decide on the PR/issue. Relevant to the library API team, which will review and decide on the PR/issue.

Status: Open.

#140943 In rust-lang/rust;

· GuillaumeGomez opened on May 12, 2025

Add support for repetition to <code>proc_macro::quote</code>

A-macrosArea: All kinds of macros (custom derive, macro_rules!, proc macros, ..) Area: All kinds of macros (custom derive, macro_rules!, proc macros, ..)

A-proc-macrosArea: Procedural macros Area: Procedural macros

C-feature-requestCategory: A feature request, i.e: not implemented / a PR. Category: A feature request, i.e: not implemented / a PR.

E-help-wantedCall for participation: Help is requested to fix this issue. Call for participation: Help is requested to fix this issue.

E-mediumCall for participation: Medium difficulty. Experience needed to fix: Intermediate. Call for participation: Medium difficulty. Experience needed to fix: Intermediate.

T-libsRelevant to the library team, which will review and decide on the PR/issue. Relevant to the library team, which will review and decide on the PR/issue.

WG-macrosWorking group: Macros Working group: Macros

Status: Open.

#140238 In rust-lang/rust;

· tgross35 opened on Apr 24, 2025

Identifiers with combining characters do not work as captured identifiers in <code>println!</code> format strings

A-fmtArea: `core::fmt` Area: `core::fmt`

A-proc-macrosArea: Procedural macros Area: Procedural macros

A-UnicodeArea: Unicode Area: Unicode

C-bugCategory: This is a bug. Category: This is a bug.

T-compilerRelevant to the compiler team, which will review and decide on the PR/issue. Relevant to the compiler team, which will review and decide on the PR/issue.

T-libs-apiRelevant to the library API team, which will review and decide on the PR/issue. Relevant to the library API team, which will review and decide on the PR/issue.

Status: Open.

#137063 In rust-lang/rust;

· interactive-toast opened on Feb 15, 2025

Implement #[proc_macro_lint] to generate LintId for macro-generated warnings

A-attributesArea: Attributes (`#[...]`, `#![...]`) Area: Attributes (`#[...]`, `#![...]`)

A-diagnosticsArea: Messages for errors, warnings, and lints Area: Messages for errors, warnings, and lints

A-proc-macrosArea: Procedural macros Area: Procedural macros

S-waiting-on-authorStatus: This is awaiting some action (such as code changes or more information) from the author. Status: This is awaiting some action (such as code changes or more information) from the author.

T-compilerRelevant to the compiler team, which will review and decide on the PR/issue. Relevant to the compiler team, which will review and decide on the PR/issue.

Status: Open (in progress).

rust-lang/rustnumber 135432

#135432 In rust-lang/rust;

· dtolnay opened on Jan 13, 2025

attribute macro's <code>call_site()</code> hygiene should come from the macro's name, not the <code>#[]</code>

A-attributesArea: Attributes (`#[...]`, `#![...]`) Area: Attributes (`#[...]`, `#![...]`)

A-hygieneArea: Macro hygiene Area: Macro hygiene

A-proc-macrosArea: Procedural macros Area: Procedural macros

C-bugCategory: This is a bug. Category: This is a bug.

T-compilerRelevant to the compiler team, which will review and decide on the PR/issue. Relevant to the compiler team, which will review and decide on the PR/issue.

T-libsRelevant to the library team, which will review and decide on the PR/issue. Relevant to the library team, which will review and decide on the PR/issue.

Status: Open.

#134882 In rust-lang/rust;

· programmerjake opened on Dec 29, 2024

rust_2024_incompatible_pat bad suggestion with proc-macro when brace comes from input

A-edition-2024Area: The 2024 edition Area: The 2024 edition

A-proc-macrosArea: Procedural macros Area: Procedural macros

C-bugCategory: This is a bug. Category: This is a bug.

D-editionDiagnostics: An error or lint that should account for edition differences. Diagnostics: An error or lint that should account for edition differences.

D-invalid-suggestionDiagnostics: A structured suggestion resulting in incorrect code. Diagnostics: A structured suggestion resulting in incorrect code.

I-edition-triagedIssue: This issue has been reviewed and triaged by the Edition team. Issue: This issue has been reviewed and triaged by the Edition team.

L-rust_2024_incompatible_patLint: rust_2024_incompatible_pat Lint: rust_2024_incompatible_pat

T-compilerRelevant to the compiler team, which will review and decide on the PR/issue. Relevant to the compiler team, which will review and decide on the PR/issue.

Status: Open.

#132963 In rust-lang/rust;

· ehuss opened on Nov 12, 2024

Add a regression test for #132587

A-parserArea: The lexing & parsing of Rust source code to an AST Area: The lexing & parsing of Rust source code to an AST

A-proc-macrosArea: Procedural macros Area: Procedural macros

C-bugCategory: This is a bug. Category: This is a bug.

E-mediumCall for participation: Medium difficulty. Experience needed to fix: Intermediate. Call for participation: Medium difficulty. Experience needed to fix: Intermediate.

E-needs-testCall for participation: An issue has been fixed and does not reproduce, but no test has been added. Call for participation: An issue has been fixed and does not reproduce, but no test has been added.

T-compilerRelevant to the compiler team, which will review and decide on the PR/issue. Relevant to the compiler team, which will review and decide on the PR/issue.

Status: Open.

#132727 In rust-lang/rust;

· jieyouxu opened on Nov 7, 2024