Search results

Compiler can't consistently auto-coerce fn pointers

A-coercionsArea: implicit and explicit `expr as Type` coercionsArea: implicit and explicit `expr as Type` coercions

A-inferenceArea: Type inferenceArea: Type inference

C-enhancementCategory: An issue proposing an enhancement or a PR with one.Category: An issue proposing an enhancement or a PR with one.

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.

#149731 In rust-lang/rust;

· jamesmunns opened on Dec 7, 2025

Type inference should success with generic trait and placeholder

A-inferenceArea: Type inferenceArea: Type inference

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

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.

Status: Open.

#149626 In rust-lang/rust;

· mu001999 opened on Dec 4, 2025

function call inference incorrectly handles autoderef chains which encounter infer

A-inferenceArea: Type inferenceArea: Type inference

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.

#146437 In rust-lang/rust;

· lcnr opened on Sep 11, 2025

Asynchronous closures make trait constraint inference recursive

A-inferenceArea: Type inferenceArea: Type inference

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

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.

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.

#146399 In rust-lang/rust;

· eareimu opened on Sep 10, 2025

rustc flags the wrong line for an ambiguous <code>.into</code>

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

A-inferenceArea: Type inferenceArea: Type inference

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

D-terseDiagnostics: An error or lint that doesn't give enough information about the problem at hand.Diagnostics: An error or lint that doesn't give enough information about the problem at hand.

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.

#146126 In rust-lang/rust;

· mutexlox-signal opened on Sep 2, 2025

"type annotations needed" on associated type with type parameter, even when said parameter is already known

A-associated-itemsArea: Associated items (types, constants & functions)Area: Associated items (types, constants & functions)

A-inferenceArea: Type inferenceArea: Type inference

A-trait-systemArea: Trait systemArea: Trait system

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.

#145609 In rust-lang/rust;

· AhoyISki opened on Aug 19, 2025

Cannot infer type using <code>as _</code> while indexing

A-coercionsArea: implicit and explicit `expr as Type` coercionsArea: implicit and explicit `expr as Type` coercions

A-inferenceArea: Type inferenceArea: Type inference

C-enhancementCategory: An issue proposing an enhancement or a PR with one.Category: An issue proposing an enhancement or a PR with one.

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.

#145178 In rust-lang/rust;

· panpanpro888 opened on Aug 9, 2025

Parameters in generic associated types do not propagate if unused

A-GATsArea: Generic associated types (GATs)Area: Generic associated types (GATs)

A-inferenceArea: Type inferenceArea: Type inference

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

Status: Open.

#144858 In rust-lang/rust;

· SuperSamus opened on Aug 3, 2025

bad type inference for <code>NonZero::{MIN,MAX}</code>

A-inferenceArea: Type inferenceArea: Type inference

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.

#143758 In rust-lang/rust;

· ada4a opened on Jul 10, 2025

Const generic type inference works when it should not

A-inferenceArea: Type inferenceArea: Type inference

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

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

P-lowLow priorityLow 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: Open.

#142378 In rust-lang/rust;

· nazar-pc opened on Jun 11, 2025

<code>type annotations needed</code> for <code>if let Some(whatever) = todo!() {</code> not very helpful

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

A-inferenceArea: Type inferenceArea: Type inference

A-patternsRelating to patterns and pattern matchingRelating to patterns and pattern matching

D-lack-of-suggestionDiagnostics: Adding a (structured) suggestion would increase the quality of the diagnostic.Diagnostics: Adding a (structured) suggestion would increase the quality of the diagnostic.

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.

#141742 In rust-lang/rust;

· matthiaskrgr opened on May 29, 2025

type inference failure confusing diagnostic let Some(x) = None for [u8]

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

A-inferenceArea: Type inferenceArea: Type inference

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.

#141336 In rust-lang/rust;

· midnightveil opened on May 21, 2025