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Tracking issue for release notes of #141260: Allow volatile access to non-Rust memory, including address 0

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-langRelevant to the language teamRelevant to the language team

T-opsemRelevant to the opsem teamRelevant to the opsem team

Status: Open.

#142511 In rust-lang/rust;

· rustbot opened on Jun 14, 2025

Can't use fn() for C binding if C uses sentinel value

A-FFIArea: Foreign function interface (FFI)Area: Foreign function interface (FFI)

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

T-opsemRelevant to the opsem teamRelevant to the opsem team

Status: Open.

#141660 In rust-lang/rust;

· karolherbst opened on May 27, 2025

Missed optimization: multiple instances of a small struct don't reuse the stack allocation

A-codegenArea: Code generationArea: Code generation

A-MIRArea: Mid-level IR (MIR) - https://blog.rust-lang.org/2016/04/19/MIR.htmlArea: Mid-level IR (MIR) - https://blog.rust-lang.org/2016/04/19/MIR.html

A-mir-optArea: MIR optimizationsArea: MIR optimizations

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

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-opsemRelevant to the opsem teamRelevant to the opsem team

Status: Open.

#141649 In rust-lang/rust;

· ohadravid opened on May 27, 2025

<code>&amp;raw const some_union.field</code> erroneously requires <code>unsafe</code>

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

T-langRelevant to the language teamRelevant to the language team

T-opsemRelevant to the opsem teamRelevant to the opsem team

Status: Open.

#141264 In rust-lang/rust;

· kupiakos opened on May 19, 2025

Allow volatile access to non-Rust memory, including address 0

disposition-mergeThis issue / PR is in PFCP or FCP with a disposition to merge it.This issue / PR is in PFCP or FCP with a disposition to merge it.

finished-final-comment-periodThe final comment period is finished for this PR / Issue.The final comment period is finished for this PR / Issue.

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

T-langRelevant to the language teamRelevant to the language team

T-opsemRelevant to the opsem teamRelevant to the opsem team

to-announceAnnounce this issue on triage meetingAnnounce this issue on triage meeting

Status: Open (in progress).

rust-lang/rustnumber 141260

#141260 In rust-lang/rust;

· LuigiPiucco opened on May 19, 2025

Some platforms cannot provide strict IEEE-754 conformant subnormals due to real-time guarantees and/or hardware limitations

A-floating-pointArea: Floating point numbers and arithmeticArea: Floating point numbers and arithmetic

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-opsemRelevant to the opsem teamRelevant to the opsem team

Status: Open.

#139277 In rust-lang/rust;

· DemiMarie opened on Apr 2, 2025

dubious <code>&amp;raw const|mut value</code> compile error

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

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

T-opsemRelevant to the opsem teamRelevant to the opsem team

Status: Open.

#139156 In rust-lang/rust;

· Paladynee opened on Mar 30, 2025

core::ptr::replace implementation is unsound since Rust 1.80

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

T-langRelevant to the language teamRelevant to the language team

T-opsemRelevant to the opsem teamRelevant to the opsem team

Status: Open.

#138351 In rust-lang/rust;

· orlp opened on Mar 11, 2025

Atomic*::as_ptr unnecessarily restricts operations on the pointer to atomic operations

A-atomicArea: Atomics, barriers, and sync primitivesArea: Atomics, barriers, and sync primitives

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

E-mediumCall for participation: Medium difficulty. Experience needed to fix: Intermediate.Call for participation: Medium difficulty. Experience needed to fix: Intermediate.

T-opsemRelevant to the opsem teamRelevant to the opsem team

Status: Open.

#138246 In rust-lang/rust;

· briansmith opened on Mar 8, 2025

Decide what to do about <code>UnsafePinned</code> and safe <code>Pin::as_ref</code>

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

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

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

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

T-langRelevant to the language teamRelevant to the language team

T-opsemRelevant to the opsem teamRelevant to the opsem team

Status: Open.

#137750 In rust-lang/rust;

· traviscross opened on Feb 27, 2025

LLVM <code>nocapture</code> attribute is used incorrectly

A-codegenArea: Code generationArea: Code generation

A-LLVMArea: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues.Area: Code generation parts specific to LLVM. Both correctness bugs and optimization-related issues.

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

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-opsemRelevant to the opsem teamRelevant to the opsem team

Status: Open.

#137668 In rust-lang/rust;

· tmiasko opened on Feb 26, 2025

"accessible" terminology in with_exposed_provenance docs is misleading

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

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

T-opsemRelevant to the opsem teamRelevant to the opsem team

Status: Open.

#137060 In rust-lang/rust;

· saethlin opened on Feb 15, 2025