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Segfault due to <code>impossible_predicates</code> treating ambiguous obligation as impossible

A-codegenArea: Code generation Area: Code generation

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

I-unsoundIssue: A soundness hole (worst kind of bug), see: https://en.wikipedia.org/wiki/Soundness Issue: A soundness hole (worst kind of bug), see: https://en.wikipedia.org/wiki/Soundness

P-criticalCritical priority Critical 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.

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.

WG-trait-system-refactorThe Rustc Trait System Refactor Initiative (-Znext-solver) The Rustc Trait System Refactor Initiative (-Znext-solver)

Status: Closed (completed).

#141119 In rust-lang/rust;

· by compiler-errors was closed on May 17, 2025

ICE when lowering <code>sym fn</code> operand in global/inline asm macro that has a nested def id

A-inline-assemblyArea: Inline assembly (`asm!(...)`) Area: Inline assembly (`asm!(...)`)

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) ❄️

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).

#137179 In rust-lang/rust;

· by compiler-errors was closed on Feb 23, 2025

<code>safe</code> keyword is not feature-gated

P-highHigh priority High 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).

#126755 In rust-lang/rust;

· by compiler-errors was closed on Jul 5, 2024

Mismatched number of captures w/ async closures

A-async-closures`async || {}` `async || {}`

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: Not planned (skipped).

#123422 In rust-lang/rust;

· by compiler-errors was closed on Apr 20, 2024

<code>Unexpected initial operand type</code> with async closures and <code>FnOnce</code>

A-async-awaitArea: Async & Await Area: Async & Await

A-async-closures`async || {}` `async || {}`

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: Closed (completed).

#123251 In rust-lang/rust;

· by compiler-errors was closed on Apr 3, 2024

nested TAITs/ATPITs should reject higher-ranked regions

A-lifetimesArea: Lifetimes / regions Area: Lifetimes / regions

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: Closed (completed).

#122093 In rust-lang/rust;

· by compiler-errors was closed on Mar 8, 2024

Unconstrained lifetimes are allowed on return-position-impl-trait-in-trait impl methods

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

F-return_position_impl_trait_in_trait`#![feature(return_position_impl_trait_in_trait)]` `#![feature(return_position_impl_trait_in_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.

Status: Closed (completed).

#109468 In rust-lang/rust;

· by compiler-errors was closed on Jun 14, 2023

ICE when selecting param-env inherent method with non-lifetime binder

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) ❄️

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).

#108836 In rust-lang/rust;

· by compiler-errors was closed on Apr 10, 2023

[CRATER ONLY] Make opaque_hidden_inferred_bound lint a hard error

A-translationArea: Translation infrastructure, and migrating existing diagnostics to SessionDiagnostic Area: Translation infrastructure, and migrating existing diagnostics to SessionDiagnostic

S-waiting-on-reviewStatus: Awaiting review from the assignee but also interested parties. Status: Awaiting review from the assignee but also interested parties.

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 (abandoned).

rust-lang/rustnumber 102593

#102593 In rust-lang/rust;

· by compiler-errors was closed on Nov 7, 2022

Make RPITIT work across crates

F-return_position_impl_trait_in_trait`#![feature(return_position_impl_trait_in_trait)]` `#![feature(return_position_impl_trait_in_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.

Status: Closed (completed).

#101630 In rust-lang/rust;

· by compiler-errors was closed on Sep 30, 2022

Missing suggestion to dereference LHS of assignment when LHS is invalid

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

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).

#93980 In rust-lang/rust;

· by compiler-errors was closed on May 18, 2022

Calling slice method on newtype wrapper that implements <code>Deref&lt;Target=[_; 1]&gt;</code> causes ICE

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

glacierICE tracked in rust-lang/glacier. ICE tracked in rust-lang/glacier.

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

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).

#92637 In rust-lang/rust;

· by compiler-errors was closed on Jan 18, 2022