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2024 edition regression: cannot write blanket implementation for closures that return the Never type

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

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

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-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.

#139610 In rust-lang/rust;

· alice-i-cecile opened on Apr 10, 2025

<code>#![no_implicit_prelude]</code> does not disable macros

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

A-maybe-future-editionSomething we may consider for a future edition.Something we may consider for a future edition.

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.

#138756 In rust-lang/rust;

· kpreid opened on Mar 20, 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

Tracking issue for warning for rust_2018_idioms by default

A-edition-2018Area: The 2018 editionArea: The 2018 edition

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.

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-impl-incompleteStatus: The implementation is incomplete.Status: The implementation is incomplete.

T-editionRelevant to the edition team.Relevant to the edition team.

T-langRelevant to the language teamRelevant to the language team

Status: Open.

#54910 In rust-lang/rust;

· shepmaster opened on Oct 8, 2018