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free region visitor for liveness marking regions dead and polonius alpha soundness

A-borrow-checkerArea: The borrow checkerArea: The borrow checker

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

NLL-poloniusIssues related for using Polonius in the borrow checkerIssues related for using Polonius in the borrow checker

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.

#153215 In rust-lang/rust;

· lqd opened on Feb 28, 2026

Clippy thinks casting u8/u16 to usize is infallible

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.

#153213 In rust-lang/rust;

· venezuela-wq57 opened on Feb 28, 2026

Compiler hangs with uninitialized variable containing a struct that contains itself

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

A-type-systemArea: Type systemArea: Type system

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

I-hangIssue: The compiler never terminates, due to infinite loops, deadlock, livelock, etc.Issue: The compiler never terminates, due to infinite loops, deadlock, livelock, etc.

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.

Status: Open.

#153205 In rust-lang/rust;

· theemathas opened on Feb 28, 2026

Tracking issue for release notes of #152615: refactor 'valid for read/write' definition: exclude null

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.

relnotesMarks issues that should be documented in the release notes of the next release.Marks issues that should be documented in the release notes of the next release.

relnotes-tracking-issueMarks issues tracking what text to put in release notes.Marks issues tracking what text to put in release notes.

T-libsRelevant to the library team, which will review and decide on the PR/issue.Relevant to the library team, which will review and decide on the PR/issue.

Status: Open.

#153201 In rust-lang/rust;

· rustbot opened on Feb 27, 2026

[ICE]: -Zquery-dep-graph on empty file

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) ❄️

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.

requires-debug-assertionsThis issue requires a build of rustc or tooling with debug-assertions in some wayThis issue requires a build of rustc or tooling with debug-assertions 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.

#153199 In rust-lang/rust;

· matthiaskrgr opened on Feb 27, 2026

[ICE]: macro inside const

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

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

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.

Status: Open.

#153198 In rust-lang/rust;

· matthiaskrgr opened on Feb 27, 2026

ICE : <code>not yet implemented: Iterator is not yet const</code>

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) ❄️

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.

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

Status: Open.

#153195 In rust-lang/rust;

· trait-Cong opened on Feb 27, 2026

Diagnostics code produces malformed obligations

C-cleanupCategory: PRs that clean code up or issues documenting cleanup.Category: PRs that clean code up or issues documenting cleanup.

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-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.

#153186 In rust-lang/rust;

· lcnr opened on Feb 27, 2026

<code>type_info</code> on higher-ranked function pointer produces <code>TypeId</code> with strange lifetime.

A-higher-rankedArea: Higher-ranked things (e.g., lifetimes, types, trait bounds aka HRTBs)Area: Higher-ranked things (e.g., lifetimes, types, trait bounds aka HRTBs)

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

F-type_info#![feature(type_info)]#![feature(type_info)]

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-libs-apiRelevant to the library API team, which will review and decide on the PR/issue.Relevant to the library API team, which will review and decide on the PR/issue.

Status: Open.

#153176 In rust-lang/rust;

· theemathas opened on Feb 27, 2026

<code>unsized_const_params</code> pointer identity is nondeterministic with incremental compilation

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

A-incr-compArea: Incremental compilationArea: Incremental compilation

A-monomorphizationArea: MonomorphizationArea: Monomorphization

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

A-reproducibilityArea: Reproducible / deterministic buildsArea: Reproducible / deterministic builds

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

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

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-langRelevant to the language teamRelevant to the language team

T-opsemRelevant to the opsem teamRelevant to the opsem team

Status: Open.

#153168 In rust-lang/rust;

· theemathas opened on Feb 27, 2026

Compiler hang with nested <code>impl Trait</code> and multiple lifetime bounds in associated type

A-trait-systemArea: Trait systemArea: Trait system

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

I-hangIssue: The compiler never terminates, due to infinite loops, deadlock, livelock, etc.Issue: The compiler never terminates, due to infinite loops, deadlock, livelock, etc.

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.

Status: Open.

#153164 In rust-lang/rust;

· Anonymous1-design opened on Feb 27, 2026

ICE: cannot find <code>R/#0</code> in param-env when using generic parameters in const operations

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

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: Open.

#153163 In rust-lang/rust;

· Anonymous1-design opened on Feb 27, 2026