Hello and welcome to another issue of This Week in Rust! Rust is a programming language empowering everyone to build reliable and efficient software. This is a weekly summary of its progress and community. Want something mentioned? Tag us at @thisweekinrust.bsky.social on Bluesky or @ThisWeekinRust on mastodon.social, or send us a pull request. Want to get involved? We love contributions.

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Updates from Rust Community

Official

Foundation

Newsletters

Project/Tooling Updates

Observations/Thoughts

Rust Walkthroughs

Miscellaneous

Crate of the Week

This week's crate is corosensei, a crate that allows you to write stackful coroutines on stable Rust.

Thanks to Christiaan for the suggestion!

Please submit your suggestions and votes for next week!

Calls for Testing

An important step for RFC implementation is for people to experiment with the implementation and give feedback, especially before stabilization.

If you are a feature implementer and would like your RFC to appear in this list, add a call-for-testing label to your RFC along with a comment providing testing instructions and/or guidance on which aspect(s) of the feature need testing.

Let us know if you would like your feature to be tracked as a part of this list.

Call for Participation; projects and speakers

CFP - Projects

Always wanted to contribute to open-source projects but did not know where to start? Every week we highlight some tasks from the Rust community for you to pick and get started!

Some of these tasks may also have mentors available, visit the task page for more information.

If you are a Rust project owner and are looking for contributors, please submit tasks here or through a PR to TWiR or by reaching out on Bluesky or Mastodon!

CFP - Events

Are you a new or experienced speaker looking for a place to share something cool? This section highlights events that are being planned and are accepting submissions to join their event as a speaker.

  • Rustikon 2026 | CFP closes 2025-11-24 | Warsaw, Poland | 2025-03-19 - 2025-03-20 | Event Website
  • TokioConf 2026 | CFP closes 2025-12-08 | Portland, Oregon, USA | 2026-04-20
  • RustWeek 2026 | CFP closes 2025-12-31 | Utrecht, The Netherlands | 2026-05-19 - 2026-05-20

If you are an event organizer hoping to expand the reach of your event, please submit a link to the website through a PR to TWiR or by reaching out on Bluesky or Mastodon!

Updates from the Rust Project

509 pull requests were merged in the last week

Compiler

Library

Cargo

Rustdoc

Clippy

Rust-Analyzer

Rust Compiler Performance Triage

A fairly quiet week overall, despite a slightly higher than usual amount of merged PRs.

Triage done by @simulacrum. Revision range: b64df9d1..eca9d93f

3 Regressions, 1 Improvement, 4 Mixed; 3 of them in rollups 43 artifact comparisons made in total

See the [full report](https://github.com/rust-lang/rustc-perf/blob/master/triage/2025/2025-12-02.md] for details.

Approved RFCs

Changes to Rust follow the Rust RFC (request for comments) process. These are the RFCs that were approved for implementation this week:

  • No RFCs entered Final Comment Period this week.

Final Comment Period

Every week, the team announces the 'final comment period' for RFCs and key PRs which are reaching a decision. Express your opinions now.

Tracking Issues & PRs

Rust

Compiler Team (MCPs only) * Use annotate-snippets as the default emitter * Promote powerpc64-unknown-linux-musl to tier 2 with host tools * Proposal for a dedicated test suite for the parallel frontend * Promote tier 3 riscv32 ESP-IDF targets to tier 2 * Proposal for Adapt Stack Protector for Rust * Give integer literals a sign instead of relying on negation expressions * Also enable ICE file dumps on stable * New Tier-3 target proposal: loongarch64-linux-android

Rust RFCs * Adding a crates.io Security tab

Cargo * feat: stabilize -Zconfig-include

No Items entered Final Comment Period this week for Language Team, Language Reference, Leadership Council or Unsafe Code Guidelines.

Let us know if you would like your PRs, Tracking Issues or RFCs to be tracked as a part of this list.

New and Updated RFCs

Upcoming Events

Rusty Events between 2025-12-03 - 2025-12-31 🦀

Virtual

Asia

Europe

North America

Oceania

If you are running a Rust event please add it to the calendar to get it mentioned here. Please remember to add a link to the event too. Email the Rust Community Team for access.

Jobs

Please see the latest Who's Hiring thread on r/rust

Quote of the Week

[...] just returning an error is not error handling, it is just user space unwinding.

– Ddystopia on Rust-internals

Thanks to Aleksander Krauze for the suggestion!

Please submit quotes and vote for next week!

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