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Conditional <code>char</code> counter not recognized as never-overflowing

A-sliceArea: `[T]`Area: `[T]`

C-optimizationCategory: An issue highlighting optimization opportunities or PRs implementing suchCategory: An issue highlighting optimization opportunities or PRs implementing such

I-slowIssue: Problems and improvements with respect to performance of generated code.Issue: Problems and improvements with respect to performance of generated code.

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.

#143959 In rust-lang/rust;

· Rudxain opened on Jul 15, 2025

<code>RawVec</code> sets capacity incorrectly, causing potentially many bugs

A-allocatorsArea: Custom and system allocatorsArea: Custom and system allocators

A-collectionsArea: `std::collections`Area: `std::collections`

A-sliceArea: `[T]`Area: `[T]`

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.

#116580 In rust-lang/rust;

· jmaargh opened on Oct 9, 2023

Diagnostic for const with slice type should suggest converting to array type

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

A-sliceArea: `[T]`Area: `[T]`

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.

#102390 In rust-lang/rust;

· jruderman opened on Sep 28, 2022

Missing docs for panics when slicing with ranges out of bounds

A-docsArea: Documentation for any part of the project, including the compiler, standard library, and toolsArea: Documentation for any part of the project, including the compiler, standard library, and tools

A-sliceArea: `[T]`Area: `[T]`

E-help-wantedCall for participation: Help is requested to fix this issue.Call for participation: Help is requested to fix this issue.

Status: Open.

#100190 In rust-lang/rust;

· Sejsel opened on Aug 6, 2022

request: lint when raw pointer slicing implicitly creates a temporary reference

A-lintsArea: Lints (warnings about flaws in source code) such as unused_mut.Area: Lints (warnings about flaws in source code) such as unused_mut.

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

A-sliceArea: `[T]`Area: `[T]`

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

T-opsemRelevant to the opsem teamRelevant to the opsem team

Status: Open.

#99437 In rust-lang/rust;

· RalfJung opened on Jul 18, 2022

Tracking Issue for <code>*mut [T]::split_at_mut</code>

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

A-sliceArea: `[T]`Area: `[T]`

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

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.

#95595 In rust-lang/rust;

· the8472 opened on Apr 2, 2022

The assembly code generated by calling <code>&lt;[T]&gt;::sort_unstable_by</code> contains bounds checking code

A-codegenArea: Code generationArea: Code generation

A-sliceArea: `[T]`Area: `[T]`

C-optimizationCategory: An issue highlighting optimization opportunities or PRs implementing suchCategory: An issue highlighting optimization opportunities or PRs implementing such

E-hardCall for participation: Hard difficulty. Experience needed to fix: A lot.Call for participation: Hard difficulty. Experience needed to fix: A lot.

E-help-wantedCall for participation: Help is requested to fix this issue.Call for participation: Help is requested to fix this issue.

I-slowIssue: Problems and improvements with respect to performance of generated code.Issue: Problems and improvements with respect to performance of generated code.

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.

#92958 In rust-lang/rust;

· EFanZh opened on Jan 16, 2022

MaybeUninit::fill_slice

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

A-sliceArea: `[T]`Area: `[T]`

C-feature-requestCategory: A feature request, i.e: not implemented / a PR.Category: A feature request, i.e: not implemented / a PR.

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.

#91053 In rust-lang/rust;

· stepancheg opened on Nov 19, 2021

slice docs could use example functions, clear header

A-docsArea: Documentation for any part of the project, including the compiler, standard library, and toolsArea: Documentation for any part of the project, including the compiler, standard library, and tools

A-sliceArea: `[T]`Area: `[T]`

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

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.

#85950 In rust-lang/rust;

· workingjubilee opened on Jun 3, 2021

Use sort_unstable to sort primitive types

A-sliceArea: `[T]`Area: `[T]`

C-optimizationCategory: An issue highlighting optimization opportunities or PRs implementing suchCategory: An issue highlighting optimization opportunities or PRs implementing such

I-slowIssue: Problems and improvements with respect to performance of generated code.Issue: Problems and improvements with respect to performance of generated code.

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.

#80483 In rust-lang/rust;

· ChrisJefferson opened on Dec 29, 2020

MaybeUninit::write_slice_cloned() makes it very easy to accidentally leak

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

A-sliceArea: `[T]`Area: `[T]`

Status: Open.

#80376 In rust-lang/rust;

· mgeier opened on Dec 26, 2020

Inconsistent failure in byte slice &amp;[u8] comparison caused by unrelated code

A-inferenceArea: Type inferenceArea: Type inference

A-sliceArea: `[T]`Area: `[T]`

A-type-systemArea: Type systemArea: Type 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.

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.

#77314 In rust-lang/rust;

· aidanhs opened on Sep 28, 2020