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regression: error: expected one of <code>!</code>, <code>.</code>, <code>;</code>, <code>?</code>, <code>{</code>, <code>}</code>, or an operator, found <code>::</code>

A-decl-macros-1-2Area: Declarative macros 1.2Area: Declarative macros 1.2

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.

regression-from-stable-to-betaPerformance or correctness regression from stable to beta.Performance or correctness regression from stable to beta.

S-has-bisectionStatus: A bisection has been found for this issueStatus: A bisection has been found for this issue

Status: Not planned (skipped).

#140223 In rust-lang/rust;

· by cuviper was closed on Apr 24, 2025

 ·  

1.87.0

regression: error: attempted to repeat an expression containing no syntax variables matched as repeating at this depth

A-decl-macros-1-2Area: Declarative macros 1.2Area: Declarative macros 1.2

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.

P-highHigh priorityHigh priority

regression-from-stable-to-betaPerformance or correctness regression from stable to beta.Performance or correctness regression from stable to beta.

S-has-bisectionStatus: A bisection has been found for this issueStatus: A bisection has been found for this issue

S-has-mcveStatus: A Minimal Complete and Verifiable Example has been found for this issueStatus: A Minimal Complete and Verifiable Example has been found for this issue

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: Closed (completed).

#140221 In rust-lang/rust;

· by cuviper was closed on May 1, 2025

 ·  

1.87.0

Lifetimes are not hygenic

A-decl-macros-1-2Area: Declarative macros 1.2Area: Declarative macros 1.2

A-lifetimesArea: Lifetimes / regionsArea: Lifetimes / regions

Status: Closed (completed).

#55744 In rust-lang/rust;

· by RalfJung was closed on Jan 27, 2019

Links in doc comments to proc_macro_attribute functions cause rustdoc panic

A-decl-macros-1-2Area: Declarative macros 1.2Area: Declarative macros 1.2

A-intra-doc-linksArea: Intra-doc links, the ability to link to items in docs by nameArea: Intra-doc links, the ability to link to items in docs by name

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

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

Status: Closed (completed).

#55399 In rust-lang/rust;

· by antonok-edm was closed on Jan 25, 2019

'error[E0405]: cannot find trait 'trait_name' in the crate root' while custom a derive

A-decl-macros-1-2Area: Declarative macros 1.2Area: Declarative macros 1.2

Status: Closed (completed).

#55026 In rust-lang/rust;

· by fpcsong was closed on Oct 30, 2018

ICE compiling the objrs crate

A-decl-macros-1-2Area: Declarative macros 1.2Area: Declarative macros 1.2

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

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

P-highHigh priorityHigh priority

regression-from-stable-to-betaPerformance or correctness regression from stable to beta.Performance or correctness regression from stable to beta.

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: Closed (completed).

#54059 In rust-lang/rust;

· by mjbshaw was closed on Sep 22, 2018

<code>#[deny]</code> in expansion of proc macro is ignored

A-decl-macros-1-2Area: Declarative macros 1.2Area: Declarative macros 1.2

A-lintsArea: Lints (warnings about flaws in source code) such as unused_mut.Area: Lints (warnings about flaws in source code) such as unused_mut.

Status: Closed (completed).

#53975 In rust-lang/rust;

· by japaric was closed on Sep 5, 2018

Disallow attribute macros named cfg

A-decl-macros-1-2Area: Declarative macros 1.2Area: Declarative macros 1.2

Status: Closed (completed).

#53531 In rust-lang/rust;

· by djrenren was closed on Sep 12, 2018

Import resolution regression when test has the same name as extern macro

A-decl-macros-1-2Area: Declarative macros 1.2Area: Declarative macros 1.2

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

P-highHigh priorityHigh priority

Status: Closed (completed).

#53144 In rust-lang/rust;

· by dtolnay was closed on Aug 13, 2018

macro imports don't work when there are _two_ imported attributes

A-decl-macros-1-2Area: Declarative macros 1.2Area: Declarative macros 1.2

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.

Status: Closed (completed).

#52525 In rust-lang/rust;

· by Manishearth was closed on Jul 21, 2018

Macro path resolution ignores preludes

A-decl-macros-1-2Area: Declarative macros 1.2Area: Declarative macros 1.2

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

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

Status: Closed (completed).

#52512 In rust-lang/rust;

· by petrochenkov was closed on Aug 2, 2018

Using a proc_macro crate with more than 9 macros causes an ICE

A-decl-macros-1-2Area: Declarative macros 1.2Area: Declarative macros 1.2

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

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

P-mediumMedium priorityMedium priority

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: Closed (completed).

#52370 In rust-lang/rust;

· by Bobo1239 was closed on Sep 15, 2018