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Rollup of 8 pull requests

A-metaArea: Issues & PRs about the rust-lang/rust repository itselfArea: Issues & PRs about the rust-lang/rust repository itself

A-tidyArea: The tidy toolArea: The tidy tool

O-hermitOperating System: HermitOperating System: Hermit

O-SGXTarget: SGXTarget: SGX

O-solidOperating System: SOLIDOperating System: SOLID

O-unixOperating system: Unix-likeOperating system: Unix-like

O-windowsOperating system: WindowsOperating system: Windows

rollupA PR which is a rollupA PR which is a rollup

S-waiting-on-borsStatus: Waiting on bors to run and complete tests. Bors will change the label on completion.Status: Waiting on bors to run and complete tests. Bors will change the label on completion.

T-bootstrapRelevant to the bootstrap subteam: Rust's build system (x.py and src/bootstrap)Relevant to the bootstrap subteam: Rust's build system (x.py and src/bootstrap)

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-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.

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

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

Status: Open (in progress).

rust-lang/rustnumber 149979

#149979 In rust-lang/rust;

· ChrisDenton opened on Dec 14, 2025

deprecate <code>Eq::assert_receiver_is_total_eq</code> and emit a FCW on manual …

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.

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 (in progress).

rust-lang/rustnumber 149978

#149978 In rust-lang/rust;

· cyrgani opened on Dec 14, 2025

Add waker_fn and local_waker_fn to std::task

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

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 (in progress).

rust-lang/rustnumber 149976

#149976 In rust-lang/rust;

· tisonkun opened on Dec 14, 2025

Skip PhantomData in Unsize checks

needs-fcpThis change is insta-stable, or significant enough to need a team FCP to proceed.This change is insta-stable, or significant enough to need a team FCP to proceed.

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.

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.

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 (in progress).

rust-lang/rustnumber 149968

#149968 In rust-lang/rust;

· dingxiangfei2009 opened on Dec 14, 2025

custom <code>VaList</code> layout for Hexagon

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

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

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 (in progress).

rust-lang/rustnumber 149967

#149967 In rust-lang/rust;

· folkertdev opened on Dec 13, 2025

Remove Copy impl on Ancestors

S-waiting-on-authorStatus: This is awaiting some action (such as code changes or more information) from the author.Status: This is awaiting some action (such as code changes or more information) from the author.

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: Draft (not ready).

rust-lang/rustnumber 149966

#149966 In rust-lang/rust;

· Mark-Simulacrum opened on Dec 13, 2025

The <code>thread::sleep_until</code> test frequently fails under Windows 7

A-threadArea: `std::thread`Area: `std::thread`

A-timeArea: TimeArea: Time

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

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

I-flaky-testIssue: A test is flaky/unreliable/spuriously failsIssue: A test is flaky/unreliable/spuriously fails

O-windows-7OS: Windows 7 or Windows Server 2008 R2 or etc.OS: Windows 7 or Windows Server 2008 R2 or etc.

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.

#149935 In rust-lang/rust;

· PaulDance opened on Dec 13, 2025

std: small <code>sys</code> refactor

O-androidOperating system: AndroidOperating system: Android

O-appleOperating system: Apple (macOS, iOS, tvOS, visionOS, watchOS)Operating system: Apple (macOS, iOS, tvOS, visionOS, watchOS)

O-fuchsiaOperating system: FuchsiaOperating system: Fuchsia

O-hermitOperating System: HermitOperating System: Hermit

O-linuxOperating system: LinuxOperating system: Linux

O-netbsdOperating system: NetBSDOperating system: NetBSD

O-redoxOperating system: Redox, https://www.redox-os.org/Operating system: Redox, https://www.redox-os.org/

O-SGXTarget: SGXTarget: SGX

O-solarisOperating system: SolarisOperating system: Solaris

O-solidOperating System: SOLIDOperating System: SOLID

O-unixOperating system: Unix-likeOperating system: Unix-like

O-wasiOperating system: Wasi, Webassembly System InterfaceOperating system: Wasi, Webassembly System Interface

O-wasmTarget: WASM (WebAssembly), http://webassembly.org/Target: WASM (WebAssembly), http://webassembly.org/

O-windowsOperating system: WindowsOperating system: Windows

S-waiting-on-borsStatus: Waiting on bors to run and complete tests. Bors will change the label on completion.Status: Waiting on bors to run and complete tests. Bors will change the label on completion.

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 (in progress).

rust-lang/rustnumber 149930

#149930 In rust-lang/rust;

· joboet opened on Dec 12, 2025

Documented thread hooks on panics and errors of thread spawning functions.

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

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 (in progress).

rust-lang/rustnumber 149927

#149927 In rust-lang/rust;

· AhoyISki opened on Dec 12, 2025

replace addr_of_mut with &amp;raw mut in maybeuninit docs

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

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 (in progress).

rust-lang/rustnumber 149885

#149885 In rust-lang/rust;

· inkreasing opened on Dec 11, 2025

Introduce MSRV for lints, and lint against cfg(any()/all()) on Rust 1.88+

A-attributesArea: Attributes (`#[…]`, `#![…]`)Area: Attributes (`#[…]`, `#![…]`)

A-translationArea: Translation infrastructure, and migrating existing diagnostics to SessionDiagnosticArea: 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-clippyRelevant to the Clippy team.Relevant to the Clippy team.

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-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 (in progress).

rust-lang/rustnumber 149870

#149870 In rust-lang/rust;

· clubby789 opened on Dec 11, 2025

std: avoid tearing <code>dbg!</code> prints

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

T-clippyRelevant to the Clippy team.Relevant to the Clippy team.

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 (in progress).

rust-lang/rustnumber 149869

#149869 In rust-lang/rust;

· joboet opened on Dec 10, 2025