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<code>thread_local!</code> has some shadowing issues

A-hygieneArea: Macro hygieneArea: Macro hygiene

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

A-thread-localsArea: Thread local storage (TLS)Area: Thread local storage (TLS)

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

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.

#147006 In rust-lang/rust;

· Jules-Bertholet opened on Sep 24, 2025

Exporting a <code>rustc_macro_transparency = "opaque"</code> macro from <code>std</code> spams <code>missing stability attribute</code> errors

A-decl-macros-2-0Area: Declarative macros 2.0 (#39412)Area: Declarative macros 2.0 (#39412)

A-hygieneArea: Macro hygieneArea: Macro hygiene

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

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

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

needs-triageThis issue may need triage. Remove it if it has been sufficiently triaged.This issue may need triage. Remove it if it has been sufficiently triaged.

requires-internal-featuresThis issue requires the use of internal features.This issue requires the use of internal features.

requires-nightlyThis issue requires a nightly compiler in some way.This issue requires a nightly compiler in some way.

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.

#146993 In rust-lang/rust;

· Jules-Bertholet opened on Sep 24, 2025

impl block on a type defined with type_alias_impl_trait can conflict with other unrelated impl

A-coherenceArea: CoherenceArea: Coherence

A-hygieneArea: Macro hygieneArea: Macro hygiene

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

F-type_alias_impl_trait`#[feature(type_alias_impl_trait)]``#[feature(type_alias_impl_trait)]`

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-typesRelevant to the types team, which will review and decide on the PR/issue.Relevant to the types team, which will review and decide on the PR/issue.

Status: Open.

#139583 In rust-lang/rust;

· douglas-raillard-arm opened on Apr 9, 2025

Nested macro_rules and edition spans

A-hygieneArea: Macro hygieneArea: Macro hygiene

A-macrosArea: All kinds of macros (custom derive, macro_rules!, proc macros, ..)Area: All kinds of macros (custom derive, macro_rules!, proc 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-editionRelevant to the edition team.Relevant to the edition team.

T-langRelevant to the language teamRelevant to the language team

Status: Open.

#137031 In rust-lang/rust;

· ehuss opened on Feb 14, 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 hygieneArea: Macro hygiene

A-proc-macrosArea: Procedural macrosArea: 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

<code>assert_eq!</code> is not 100% hygienic

A-hygieneArea: Macro hygieneArea: Macro hygiene

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

#131446 In rust-lang/rust;

· GrigorenkoPV opened on Oct 9, 2024

proc-macro span syntax context and hygiene is underspecified and underdocumented

A-docsArea: Documentation for any part of the project, including the compiler, standard library, and toolsArea: Documentation for any part of the project, including the compiler, standard library, and tools

A-hygieneArea: Macro hygieneArea: Macro hygiene

A-proc-macrosArea: Procedural macrosArea: Procedural macros

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

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-langRelevant to the language teamRelevant to the language team

Status: Open.

Bug

#130995 In rust-lang/rust;

· jieyouxu opened on Sep 28, 2024

Incorrect diagnostic "pattern requires <code>..</code> due to inaccessible fields" when matching in a macro

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

A-hygieneArea: Macro hygieneArea: Macro hygiene

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

D-confusingDiagnostics: Confusing error or lint that should be reworked.Diagnostics: Confusing error or lint that should be reworked.

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.

#130588 In rust-lang/rust;

· goffrie opened on Sep 19, 2024

Hygiene of <code>use</code>d macro item is weird.

A-hygieneArea: Macro hygieneArea: Macro hygiene

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

A-resolveArea: Name/path resolution done by `rustc_resolve` specificallyArea: Name/path resolution done by `rustc_resolve` specifically

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.

#95237 In rust-lang/rust;

· chorman0773 opened on Mar 23, 2022

Tracking issue for procedural macros and "hygiene 2.0"

A-hygieneArea: Macro hygieneArea: Macro hygiene

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 macrosArea: Procedural macros

B-unstableBlocker: Implemented in the nightly compiler and unstable.Blocker: Implemented in the nightly compiler and unstable.

C-tracking-issueCategory: An issue tracking the progress of sth. like the implementation of an RFCCategory: An issue tracking the progress of sth. like the implementation of an RFC

S-tracking-needs-summaryStatus: It's hard to tell what's been done and what hasn't! Someone should do some investigation.Status: It's hard to tell what's been done and what hasn't! Someone should do some investigation.

T-langRelevant to the language teamRelevant to the language team

WG-macrosWorking group: MacrosWorking group: Macros

Status: Open.

#54727 In rust-lang/rust;

· alexcrichton opened on Oct 1, 2018

Extremely weird hygiene behavior when invoking a macro from the calling crate in a Derive

A-decl-macros-2-0Area: Declarative macros 2.0 (#39412)Area: Declarative macros 2.0 (#39412)

A-hygieneArea: Macro hygieneArea: Macro hygiene

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.

#47988 In rust-lang/rust;

· sgrif opened on Feb 3, 2018

Accessing private fields from the def site of a proc macro

A-decl-macros-2-0Area: Declarative macros 2.0 (#39412)Area: Declarative macros 2.0 (#39412)

A-hygieneArea: Macro hygieneArea: Macro hygiene

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 macrosArea: 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.

#46635 In rust-lang/rust;

· antoyo opened on Dec 10, 2017