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Fn delegation introduced a theoretical syntax regression (regarding weak keyword <code>reuse</code>)

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

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

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

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.

#148238 In rust-lang/rust;

· fmease opened on Oct 29, 2025

rustdoc: Source code pages &amp; code blocks should be highlighted according to the requested / ambient edition

A-editionsArea: Related to editions collectively or in general (i.e., the mechanism itself).Area: Related to editions collectively or in general (i.e., the mechanism itself).

A-rustdoc-uiArea: Rustdoc UI (generated HTML)Area: Rustdoc UI (generated HTML)

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

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.

T-rustdoc-frontendRelevant to the rustdoc-frontend team, which will review and decide on the web UI/UX output.Relevant to the rustdoc-frontend team, which will review and decide on the web UI/UX output.

Status: Open.

#148221 In rust-lang/rust;

· fmease opened on Oct 28, 2025

rustdoc features doctests conditional on cfg or target feature but that's not RFC'ed, not tested, not really documented and somewhat broken

A-cfgArea: `cfg` conditional compilationArea: `cfg` conditional compilation

A-doctestsArea: Documentation tests, run by rustdocArea: Documentation tests, run by rustdoc

A-target-featureArea: Enabling/disabling target features like AVX, Neon, etc.Area: Enabling/disabling target features like AVX, Neon, etc.

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

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

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: Open.

#147033 In rust-lang/rust;

· fmease opened on Sep 25, 2025

rustdoc: Since 1.87 we permit shebangs in doctests that have a <code>main</code> fn

A-doctestsArea: Documentation tests, run by rustdocArea: Documentation tests, run by rustdoc

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

P-highHigh priorityHigh priority

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

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-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: Open.

#147014 In rust-lang/rust;

· fmease opened on Sep 25, 2025

rustdoc shouldn't render deduced "unimpls" of auto traits as synthetic negative impls but simply not at all

A-auto-traitsArea: auto traits (e.g., `auto trait Send {}`)Area: auto traits (e.g., `auto trait Send {}`)

A-synthetic-implsArea: Synthetic impls, used by rustdoc to document auto traits and traits with blanket implsArea: Synthetic impls, used by rustdoc to document auto traits and traits with blanket impls

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

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: Open.

#146571 In rust-lang/rust;

· fmease opened on Sep 15, 2025

rustdoc: Incorrect synthetic auto trait impl if constituents have applicable non-identity impl of auto trait

A-auto-traitsArea: auto traits (e.g., `auto trait Send {}`)Area: auto traits (e.g., `auto trait Send {}`)

A-synthetic-implsArea: Synthetic impls, used by rustdoc to document auto traits and traits with blanket implsArea: Synthetic impls, used by rustdoc to document auto traits and traits with blanket impls

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

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: Open.

#146570 In rust-lang/rust;

· fmease opened on Sep 15, 2025

The way <code>default_field_values</code> deals with in-scope generic parameters is slightly unprincipled

A-const-evalArea: Constant evaluation, covers all const contexts (static, const fn, ...)Area: Constant evaluation, covers all const contexts (static, const fn, ...)

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

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

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.

#146496 In rust-lang/rust;

· fmease opened on Sep 13, 2025

Parsing issues around qualifiers and modifiers

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

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

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

PG-const-traitsProject group: Const traitsProject group: Const traits

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.

#146122 In rust-lang/rust;

· fmease opened on Sep 2, 2025

rustdoc UI: Warning block icon is no longer a circle (on my machine) but a squircle

A-rustdoc-uiArea: Rustdoc UI (generated HTML)Area: Rustdoc UI (generated HTML)

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

regression-untriagedUntriaged performance or correctness regression.Untriaged performance or correctness regression.

S-needs-reproStatus: This issue has no reproduction and needs a reproduction to make progress.Status: This issue has no reproduction and needs a reproduction to make progress.

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.

T-rustdoc-frontendRelevant to the rustdoc-frontend team, which will review and decide on the web UI/UX output.Relevant to the rustdoc-frontend team, which will review and decide on the web UI/UX output.

Status: Open.

#144778 In rust-lang/rust;

· fmease opened on Aug 1, 2025

If inherent associated type selection fails, we should still consider trait associated type candidates as a fallback

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

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

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.

#142006 In rust-lang/rust;

· fmease opened on Jun 4, 2025

IAT: Reject implicit lifetime bounds of trait object types passed to inherent projections as indeterminate in ItemCtxts

A-dyn-traitArea: trait objects, vtable layoutArea: trait objects, vtable layout

A-lifetimesArea: Lifetimes / regionsArea: Lifetimes / regions

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

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

S-blockedStatus: Blocked on something else such as an RFC or other implementation work.Status: Blocked on something else such as an RFC or other implementation work.

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.

#141997 In rust-lang/rust;

· fmease opened on Jun 4, 2025

Make trait aliases eligible generic containers wrt. ambient object lifetime defaults

A-dyn-traitArea: trait objects, vtable layoutArea: trait objects, vtable layout

A-lifetimesArea: Lifetimes / regionsArea: Lifetimes / regions

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

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

S-blockedStatus: Blocked on something else such as an RFC or other implementation work.Status: Blocked on something else such as an RFC or other implementation work.

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.

#140710 In rust-lang/rust;

· fmease opened on May 6, 2025