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[ICE]: user-provided comparison function does not correctly implement a total order

A-mir-optArea: MIR optimizationsArea: MIR optimizations

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) ❄️

I-prioritizeIssue: Indicates that prioritization has been requested for this issue.Issue: Indicates that prioritization has been requested for this issue.

O-PowerPCTarget: PowerPC processorsTarget: PowerPC processors

regression-from-stable-to-nightlyPerformance or correctness regression from stable to nightly.Performance or correctness regression from stable to nightly.

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.

#151807 In rust-lang/rust;

· tgross35 opened on Jan 29, 2026

Hang: Infinite recursion during hidden type inference for TAIT

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.

#151806 In rust-lang/rust;

· trait-Cong opened on Jan 29, 2026

Request to Participate and Share Academic Survey on Code Review in OSS Security

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

Status: Open.

#151799 In rust-lang/rust;

· morshedniaz opened on Jan 28, 2026

Lifetime hygiene comments missing <code>#N</code> suffix in <code>-Zunpretty=expanded,hygiene</code> output

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.

#151797 In rust-lang/rust;

· aytey opened on Jan 28, 2026

Allow <code>#[diagnostic::on_unimplemented]</code> on <code>impl</code>s, specially inherent <code>impl</code>s

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

D-diagnostic-infraDiagnostics: Issues that affect all diagnostics, or relate to the diagnostic machinery itself.Diagnostics: Issues that affect all diagnostics, or relate to the diagnostic machinery itself.

F-on_unimplementedError messages that can be tackled with `#[rustc_on_unimplemented]`Error messages that can be tackled with `#[rustc_on_unimplemented]`

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.

#151796 In rust-lang/rust;

· estebank opened on Jan 28, 2026

Modify rendering of <code>const</code> params in types to make it clear they are const params and not type params

A-const-genericsArea: const generics (parameters and arguments)Area: const generics (parameters and arguments)

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

const-generics-bad-diagnosticsAn error is correctly emitted, but is confusing, for `min_const_generics`.An error is correctly emitted, but is confusing, for `min_const_generics`.

D-diagnostic-infraDiagnostics: Issues that affect all diagnostics, or relate to the diagnostic machinery itself.Diagnostics: Issues that affect all diagnostics, or relate to the diagnostic machinery itself.

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.

#151792 In rust-lang/rust;

· estebank opened on Jan 28, 2026

Regression in 1.93.0 <code>the type &lt;XYZ as Archive&gt;::Archived has an unknown layout</code>

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

A-layoutArea: Memory layout of typesArea: Memory layout of types

A-mir-optArea: MIR optimizationsArea: MIR optimizations

A-raw-pointersArea: raw pointers, MaybeUninit, NonNullArea: raw pointers, MaybeUninit, NonNull

A-trait-systemArea: Trait systemArea: Trait system

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

I-prioritizeIssue: Indicates that prioritization has been requested for this issue.Issue: Indicates that prioritization has been requested for this issue.

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-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.

#151791 In rust-lang/rust;

· konnorandrews opened on Jan 28, 2026

x86_64-pc-windows-gnu: Bootstrap fails with a segfault when building libcore after LLVM update

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.

#151790 In rust-lang/rust;

· petrochenkov opened on Jan 28, 2026

Design needed for interaction between pin ergonomics and match ergonomics 2024 (RFC 3627)

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

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

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

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

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-langRelevant to the language teamRelevant to the language team

Status: Open.

#151789 In rust-lang/rust;

· matthiaskrgr opened on Jan 28, 2026

Redundant Bound breaks const-generics Builders

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.

#151788 In rust-lang/rust;

· EsotericPyramid opened on Jan 28, 2026

Tracking Issue for <code>const_c_variadic</code>

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

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

Status: Open.

#151787 In rust-lang/rust;

· folkertdev opened on Jan 28, 2026

Make opsem for all enums consistent, independent of number of variants and <code>#[non_exhaustive]</code>

A-closuresArea: Closures (`|…| { … }`)Area: Closures (`|…| { … }`)

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

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

I-lang-radarItems that are on lang's radar and will need eventual work or consideration.Items that are on lang's radar and will need eventual work or consideration.

T-langRelevant to the language teamRelevant to the language team

T-opsemRelevant to the opsem teamRelevant to the opsem team

Status: Open.

#151786 In rust-lang/rust;

· RalfJung opened on Jan 28, 2026