[STABLE] library: `wasm32-wasip1-threads` has functional pthreads by jieyouxu · Pull Request #153634 · rust-lang/rust

jieyouxu · 2026-03-10T02:58:58Z

Minimal backport-suitable fix to avoid returning UNSUPPORTED_PLATFORM for wasm32-wasip1-threads which has a working pthreads implementation via emnapi.

The stable regression was reported in #153475.

This PR should be stable-backported-only (if accepted by T-libs) to mitigate #153475 on stable with a stable point release.

Minimal backport-suitable fix to avoid returning `UNSUPPORTED_PLATFORM` for `wasm32-wasip1-threads` which has a working pthreads implementation via `emnapi`. The stable regression was reported in <rust-lang#153475>.

jieyouxu · 2026-03-10T02:59:22Z

@alexcrichton is this what you had in mind in #153475 (comment)?

rust-log-analyzer · 2026-03-10T03:01:38Z

A job failed! Check out the build log: (web) (plain enhanced) (plain)

Click to see the possible cause of the failure (guessed by this bot)

alexcrichton · 2026-03-10T14:43:28Z

Indeed! I believe this would fix the issue while being less risky than backporting #152183

rustbot · 2026-03-11T15:14:35Z

⚠️ Warning ⚠️

Pull requests are usually filed against the main branch for this repo, but this one is against stable. Please double check that you specified the right target!

jieyouxu · 2026-03-11T15:15:13Z

@rustbot reroll

Nominating for stable-backport only for mitigating #153475; the change here will need to be cherry-picked in a stable backport rollup w/ the patch version bump if this is accepted by libs.
@rustbot label: +stable-nominated

Mark-Simulacrum · 2026-03-22T12:25:47Z

Cherry-picked into #154211.

[stable] 1.94.1 release This backports: * [STABLE] library: wasm32-wasip1-threads has functional pthreads #153634 * Move freeze_* methods to OpenOptionsExt2 #153491 * [Clippy] Fix ICE in match_same_arms rust-lang/rust-clippy#16685 Cargo: * [stable 1.94] Fix symlink_and_directory when running in a long target dir name (rust-lang/cargo#16777) * Fix symlink_and_directory when running in a long target dir name (rust-lang/cargo#16775) * [stable 1.94] Update tar to 0.4.45 (rust-lang/cargo#16769) * test: Remove unused docker ip_address (rust-lang/cargo#16636) * Increase cache_lock test timeout (rust-lang/cargo#16545) * chore: Updated compiler errors for Rust 1.93 (rust-lang/cargo#16543) * test(build-std): Update error message (rust-lang/cargo#16658) * fix: `--remap-path-scope` stabilized in 1.95-nightly (rust-lang/cargo#16536) * fix(script): surpress `unused_features` lint for embedded (rust-lang/cargo#16714) * test(git): Mark a test as non-deterministic (rust-lang/cargo#16706) * test(replace): Mark a test as non-deterministic (rust-lang/cargo#16700)

From the [blog post](https://blog.rust-lang.org/2026/03/26/1.94.1-release/) ## What's in 1.94.1 Rust 1.94.1 resolves three regressions that were introduced in the 1.94.0 release. - [Fix std::thread::spawn on wasm32-wasip1-threads](rust-lang/rust#153634) - [Remove new methods added to std::os::windows::fs::OpenOptionsExt](rust-lang/rust#153491) The new methods were unstable, but the trait itself is not sealed and so cannot be extended with non-default methods. - [Clippy: fix ICE in match_same_arms](rust-lang/rust-clippy#16685) - [Cargo: downgrade curl-sys to 0.4.83](rust-lang/cargo#16787) This fixes certificate validation error for some users on some versions of FreeBSD. See [this issue](rust-lang/cargo#16357) for more details. And a security fix: - [Cargo: Update tar to 0.4.45](rust-lang/cargo#16769) This resolves [CVE-2026-33055](https://www.cve.org/CVERecord?id=CVE-2026-33055) and [CVE-2026-33056](https://www.cve.org/CVERecord?id=CVE-2026-33056). Users of crates.io are not affected. See [blog](https://blog.rust-lang.org/2026/03/21/cve-2026-33056/) for more details.

This MR contains the following updates: | Package | Update | Change | |---|---|---| | [rust](https://github.com/rust-lang/rust) | patch | `1.94.0` → `1.94.1` | MR created with the help of [el-capitano/tools/renovate-bot](https://gitlab.com/el-capitano/tools/renovate-bot). **Proposed changes to behavior should be submitted there as MRs.** --- ### Release Notes <details> <summary>rust-lang/rust (rust)</summary> ### [`v1.94.1`](https://github.com/rust-lang/rust/blob/HEAD/RELEASES.md#Version-1941-2026-03-26) [Compare Source](rust-lang/rust@1.94.0...1.94.1) \=========================== <a id="1.94.1"></a> - [Fix `std::thread::spawn` on wasm32-wasip1-threads](rust-lang/rust#153634) - [Remove new methods added to `std::os::windows::fs::OpenOptionsExt`](rust-lang/rust#153491) The new methods were unstable, but the trait itself is not sealed and so cannot be extended with non-default methods. - [Clippy: fix ICE in `match_same_arms`](rust-lang/rust-clippy#16685) - [Cargo: update tar to 0.4.45](rust-lang/cargo#16769) This resolves CVE-2026-33055 and CVE-2026-33056. Users of crates.io are not affected. See [blog](https://blog.rust-lang.org/2026/03/21/cve-2026-33056/) for more details. </details> --- ### Configuration 📅 **Schedule**: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined). 🚦 **Automerge**: Enabled. ♻ **Rebasing**: Whenever MR is behind base branch, or you tick the rebase/retry checkbox. 🔕 **Ignore**: Close this MR and you won't be reminded about this update again. --- - [ ] If you want to rebase/retry this MR, check this box --- This MR has been generated by [Renovate Bot](https://github.com/renovatebot/renovate).

This PR contains the following updates: | Package | Update | Change | |---|---|---| | [rust](https://github.com/rust-lang/rust) | patch | `1.94.0` → `1.94.1` | --- ### Release Notes <details> <summary>rust-lang/rust (rust)</summary> ### [`v1.94.1`](https://github.com/rust-lang/rust/blob/HEAD/RELEASES.md#Version-1941-2026-03-26) [Compare Source](rust-lang/rust@1.94.0...1.94.1) \=========================== <a id="1.94.1"></a> - [Fix `std::thread::spawn` on wasm32-wasip1-threads](rust-lang/rust#153634) - [Remove new methods added to `std::os::windows::fs::OpenOptionsExt`](rust-lang/rust#153491) The new methods were unstable, but the trait itself is not sealed and so cannot be extended with non-default methods. - [Clippy: fix ICE in `match_same_arms`](rust-lang/rust-clippy#16685) - [Cargo: update tar to 0.4.45](rust-lang/cargo#16769) This resolves CVE-2026-33055 and CVE-2026-33056. Users of crates.io are not affected. See [blog](https://blog.rust-lang.org/2026/03/21/cve-2026-33056/) for more details. </details> --- ### Configuration 📅 **Schedule**: Branch creation - Between 12:00 AM and 03:59 AM ( * 0-3 * * * ) in timezone Pacific/Auckland, Automerge - Between 12:00 AM and 03:59 AM ( * 0-3 * * * ) in timezone Pacific/Auckland. 🚦 **Automerge**: Enabled. ♻ **Rebasing**: Whenever PR is behind base branch, or you tick the rebase/retry checkbox. 🔕 **Ignore**: Close this PR and you won't be reminded about this update again. --- - [ ] If you want to rebase/retry this PR, check this box --- This PR has been generated by [Renovate Bot](https://github.com/renovatebot/renovate).  Reviewed-on: https://harton.dev/project-neon/neonfs/pulls/86 Co-authored-by: Renovate Bot <bot@harton.nz> Co-committed-by: Renovate Bot <bot@harton.nz>

library: wasm32-wasip1-threads has functional pthreads

064a188

Minimal backport-suitable fix to avoid returning `UNSUPPORTED_PLATFORM` for `wasm32-wasip1-threads` which has a working pthreads implementation via `emnapi`. The stable regression was reported in <rust-lang#153475>.

rustbot added S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. T-libs Relevant to the library team, which will review and decide on the PR/issue. labels Mar 10, 2026

jieyouxu marked this pull request as ready for review March 11, 2026 15:14

rustbot added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. and removed S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. labels Mar 11, 2026

rustbot assigned Mark-Simulacrum Mar 11, 2026

rustbot added the stable-nominated Nominated for backporting to the compiler in the stable channel. label Mar 11, 2026

jieyouxu mentioned this pull request Mar 13, 2026

std::thread::spawn unconditionally disabled on WASI breaks wasm32-wasip1-threads with emnapi's working pthread implementation #153475

Closed

the8472 added the stable-accepted Accepted for backporting to the compiler in the stable channel. label Mar 18, 2026

Mark-Simulacrum mentioned this pull request Mar 22, 2026

[stable] 1.94.1 release #154211

Merged

Mark-Simulacrum closed this Mar 22, 2026

rustbot removed the S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. label Mar 22, 2026

Mark-Simulacrum removed the stable-nominated Nominated for backporting to the compiler in the stable channel. label Mar 22, 2026

jieyouxu deleted the wasm32-wasip1-threads branch March 23, 2026 00:55

CleanCut mentioned this pull request Mar 26, 2026

Bump to Rust 1.94.1 Oxen-AI/Oxen#384

Merged

Provide feedback

Saved searches

Use saved searches to filter your results more quickly

Uh oh!

[STABLE] library: `wasm32-wasip1-threads` has functional pthreads#153634

[STABLE] library: `wasm32-wasip1-threads` has functional pthreads#153634
jieyouxu wants to merge 1 commit intorust-lang:stablefrom
jieyouxu:wasm32-wasip1-threads

jieyouxu commented Mar 10, 2026 •

edited

Loading

Uh oh!

jieyouxu commented Mar 10, 2026

Uh oh!

rust-log-analyzer commented Mar 10, 2026

Uh oh!

alexcrichton commented Mar 10, 2026

Uh oh!

rustbot commented Mar 11, 2026

Uh oh!

jieyouxu commented Mar 11, 2026

Uh oh!

Mark-Simulacrum commented Mar 22, 2026

Uh oh!

Reviewers

Assignees

Labels

Projects

Milestone

Development

Uh oh!

6 participants

Uh oh!

Conversation

jieyouxu commented Mar 10, 2026 • edited Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

Uh oh!

jieyouxu commented Mar 10, 2026

Uh oh!

rust-log-analyzer commented Mar 10, 2026

Uh oh!

alexcrichton commented Mar 10, 2026

Uh oh!

rustbot commented Mar 11, 2026

Uh oh!

jieyouxu commented Mar 11, 2026

Uh oh!

Mark-Simulacrum commented Mar 22, 2026

Uh oh!

Reviewers

Assignees

Labels

Projects

Milestone

Development

Uh oh!

6 participants

jieyouxu commented Mar 10, 2026 •

edited

Loading