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.

This Week in Rust is openly developed on GitHub and archives can be viewed at this-week-in-rust.org. If you find any errors in this week's issue, please submit a PR.

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Updates from Rust Community

Official

• Announcing Rust 1.88.0 | Rust Blog
• Now accepting Project Goal proposals for 2025H2
• 2025 Leadership Council Survey
• Program management update — June 2025

Newsletters

• Rust Trends Issue #68 Special

Project/Tooling Updates

• Announcing TokioConf 2026
• rust-analyzer Changelog #292
• How to write Rust in the kernel: part 2
• Asterinas: a new Linux-compatible kernel project
• Diesel Async 0.6.0
• Kiorg - a new lightingly fast cross-platform filemanager with VIM inspired keybind
• Progress report on rustc_codegen_cranelift (June 2025)

Observations/Thoughts

• How much code does that proc macro generate?
• Leaktracer: A Rust allocator to trace memory allocations
• Cross-Compiling 10,000+ Rust CLI Crates Statically
• "Why is the Rust compiler so slow?"
• A Newbie's First Contribution to (Rust for) Linux
• Exception handling in rustc_codegen_cranelift
• Why I Choose Rust to Build a Full-Stack Admin System
• [video] Top 10 Games from Bevy Jam 6
• [video] Threads - Part 15 of Idiomatic Rust in Simple Steps
• [audio] 1Password with Andrew Burkhart
• [audio] Dioxus with Jonathan Kelley
• [audio] Malachite with Adi Seredinschi

Rust Walkthroughs

• Alternative Blanket Implementations for a Single Rust Trait

Miscellaneous

• Reflections on Haskell and Rust

Crate of the Week

This week's crate is ansic, a proc macro providing a DSL to output ANSI escape strings with zero runtime overhead.

Thanks to Zeon for the self-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.

• No calls for testing were issued this week by Rust, Rust language RFCs, Cargo or Rustup.

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.

No Calls for participation were submitted this week.

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 X (formerly Twitter) 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.

No Calls for papers or presentations were submitted this week.

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 X (formerly Twitter) or Mastodon!

Updates from the Rust Project

429 pull requests were merged in the last week

Compiler

• add #[loop_match] for improved DFA codegen
• add runtime check to avoid overwrite arg in Diag
• check CoerceUnsized impl validity before coercing
• compute hard errors without diagnostics in impl_intersection_has_impossible_obligation
• collapse Analysis|Borrowck|PostBorrowckAnalysis when there are no opaques
• encode hir attributes cross-crate properly
• fast path for WF goals in new solver
• implement parsing of pinned borrows
• improve recovery when users write where:
• introduce ByteSymbol
• new const traits syntax
• only compute recursive callees once
• shallowly bail from coerce_unsized more
• simplify ObligationCauseCode::IfExpression

Library

• add SIMD funnel shift and round-to-even intrinsics
• make RefCell unstably const
• make Sub, Mul, Div and Rem const_traits

Cargo

• add http.proxy-cainfo config for proxy certs
• expand error messages around path dependency on cargo package and cargo publish
• override Cargo.lock checksums when doing a dry-run publish
• rework cargo-test-support & testsuite to use CARGO_BIN_EXE_* for Cargo

Rustdoc

• rustdoc: show attributes on enum variants

Clippy

• missing_panics_doc: Allow unwrap() and expect() inside const-only contexts
• zero_ptr: lint in const context as well
• consider deref'ed argument as non-temporary
• cast_possible_truncation should not suggest inside const context
• fix coerce_container_to_any false positive on autoderef
• fix disallowed_script_idents FP on identifiers with _

Rust-Analyzer

• de-arc trait items query
• do not append --compile-time-deps to overwritten build script commands
• drop rustc workspace loading error, if we don't needs its sources
• highlighting of return values while the cursor is on match / if / =>
• fix completion in when typing integer.|
• prettify AST in PathTransform if it's coming from a macro
• parse new const trait syntax
• remove last use of rustc_pattern_analysis::Captures
• remove unnecessary parens in closure
• salsa idiomize VariantFields query

Rust Compiler Performance Triage

Lots of changes this week with results dominated by the 1-5% improvements from #142941 across lots of primary benchmarks in the suite.

Triage done by @simulacrum. Revision range: 42245d34..ad3b7257

3 Regressions, 6 Improvements, 5 Mixed; 4 of them in rollups 39 artifact comparisons made in total

Full report here

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 were approved 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

• [disposition: close] Draft: Make into_parts methods on Vec associated functions
• Implement Debug for EncodeWide
• If HOME is empty, use the fallback instead
• Tracking Issue for duration_constructors_lite
• Print thread ID in panic message

Rust RFCs

• RFC: enable derive(From) for single-field structs

Cargo

• Add [hints] table in Cargo.toml, and a hints.mostly-unused hint
• feat(publish): Stabilize multi-package publishing

No Items entered Final Comment Period this week for Language Reference, Language Team 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

• No New or Updated RFCs were created this week.

Upcoming Events

Rusty Events between 2025-07-02 - 2025-07-30 🦀

Virtual

• 2025-07-02 | Virtual (Indianapolis, IN, US) | Indy Rust
  • Indy.rs - with Social Distancing
• 2025-07-03 | Virtual (Berlin, DE) | Rust Berlin
  • Rust Hack and Learn
• 2025-07-03 | Virtual (Rotterdam, NL) | Bevy Game Development
  • Bevy Meetup #11
• 2025-07-05 | Virtual (Kampala, UG) | Rust Circle Meetup
  • Rust Circle Meetup
• 2025-07-06 | Virtual (Dallas, TX, US) | Dallas Rust User Meetup
  • Rust Readers Discord Discussion: Async Rust
• 2025-07-08 | Virtual (Dallas, TX, US) | Dallas Rust User Meetup
  • Second Tuesday
• 2025-07-13 | Virtual (Dallas, TX, US) | Dallas Rust User Meetup
  • Rust Readers Discord Discussion: Async Rust
• 2025-07-15 | Virtual (London, UK) | Women in Rust
  • 👋 Community Catch Up
• 2025-07-15 | Virtual (Washington, DC, US) | Rust DC
  • Mid-month Rustful
• 2025-07-16 | Virtual (Vancouver, BC, CA) | Vancouver Rust
  • Rust Study/Hack/Hang-out
• 2025-07-17 | Virtual (Berlin, DE) | Rust Berlin
  • Rust Hack and Learn
• 2025-07-20 | Virtual (Dallas, TX, US) | Dallas Rust User Meetup
  • Rust Readers Discord Discussion: Rust Atomics and Locks
• 2025-07-22 | Virtual (Dallas, TX, US) | Dallas Rust User Meetup
  • Fourth Tuesday
• 2025-07-22 | Virtual (London, UK) | Women in Rust
  • Lunch & Learn: Crates, Tips & Tricks Lightning Talks - Bring your ideas!
• 2025-07-27 | Virtual (Dallas, TX, US) | Dallas Rust User Meetup
  • Rust Readers Discord Discussion: Rust Atomics and Locks

Asia

• 2025-07-02 | Seoul, KR | Seoul Rust (Programming Language) Meetup
  • Seoul Rust Meetup

Europe

• 2025-07-02 | Basel, CH | Rust Basel
  • Rust Meetup #12 @ kHaus
• 2025-07-02 | Frankfurt, DE | Rust Rhein-Main
  • The (un)holy Trinity of Flutter, Rust and C
• 2025-07-02 | London, UK | Oxford Rust Meetup Group
  • Oxford Rust and ACCU special - Vibe coding workshop
• 2025-07-02 | Posnan, PL | Rust Poland
  • Rust Poland Meetup x Poznan
• 2025-07-03 | Karlsruhe, DE | Rust Hack & Learn Karlsruhe
  • Karlsruhe Rust Hack and Learn Meetup bei BlueYonder
• 2025-07-05 | Stockholm, SE | Stockholm Rust
  • Ferris' Fika Forum #13
• 2025-07-08 | London, UK | London Rust Project Group
  • Garbage Collection for Rust: the Finalizer Frontier
• 2025-07-09 | Girona, ES | Rust Girona
  • Rust Girona Hack & Learn 07 2025
• 2025-07-09 | Reading, UK | Reading Rust Workshop
  • Reading Rust Meetup
• 2025-07-15 | Leipzig, DE | Rust - Modern Systems Programming in Leipzig
  • Topic TBD
• 2025-07-15 | London, UK | London Rust Project Group
  • TUI Power: Simulating & Visualising Sensor Data with Rust
• 2025-07-23 | Dortmund, DE | Rust Dortmund
  • Rust Dortmund Meetup - Teach and Hack
• 2025-07-24 | Edinburgh, UK | Rust and Friends
  • July talks: A Crab, a Pufferfish and a State-of-the-art Chess AI
• 2025-07-24 | Nuremberg/Nürnberg, DE | Rust Nuremberg
  • Rust Nürnberg online
• 2025-07-29 | Manchester, UK | Rust Manchester
  • Lightning Talks July 2025
• 2025-07-30 | Amsterdam, NL | Rust Developers Amsterdam Group
  • Rust Meetup @ BlockTech

North America

• 2025-07-03 | Montréal, QC, CA | Rust Montréal
  • July Monthly Social
• 2025-07-03 | Saint Louis, MO, US | STL Rust
  • Building Resilient and Observable Rust Services with steady_state
• 2025-07-06 | Boston, MA, US | Boston Rust Meetup
  • Alewife Rust Lunch, July 6
• 2025-07-07 | Denver, CO, US | FOSS Rust Colorado
  • Embedded Rust Hack Night
• 2025-07-08 | New York, NY, US | Rust NYC
  • Rust NYC: The perks and pitfalls of using Rust for codegen
• 2025-07-09 | Phoenix, AZ, US | Desert Rust
  • Rust <> AI
• 2025-07-10 | Mountain View, CA, US | Hacker Dojo
  • RUST MEETUP at HACKER DOJO
• 2025-07-15 | San Francisco, CA, US | San Francisco Rust Study Group
  • Rust Hacking in Person
• 2025-07-17 | Nashville, TN, US | Music City Rust Developers
  • Rust on Bare Metal Series 1 : Introduction to Embedded Development
• 2025-07-17 | Redmond, WA, US | Seattle Rust User Group
  • July, 2025 Computer Programming Language Panel (Special Event)
• 2025-07-23 | Austin, TX, US | Rust ATX
  • Rust Lunch - Fareground

South America

• 2025-07-12 | São Paulo, BR | Rust São Paulo Meetup
  • Encontro do Rust-SP na WillBank
• 2025-07-17 | Florianópolis, BR | Rust Brazil + Rust Floripa
  • Rust Floripa

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

I love Rust, so I was already biased to be positive about the Rust for Linux project, even before dabbling with it myself. I'm genuinely surprised to be even more optimistic now than before. The coding part was much easier than I imagined, thanks to the use of reference counting in the kernel.

And the promised benefits of Rust over C? They're absolutely real. The Rust version of the driver feels way more robust than the C code, not just regarding memory safety. It didn't have a single bug: Once it compiled, it worked. That's not a huge deal considering it was a direct rewrite, but it counts for something.

– Remo Senekowitsch blogging about their Rust 4 Linux adventure

Despite a lamentable lack of suggestions, llogiq is reasonably pleased with his choice.

Please submit quotes and vote for next week!

This Week in Rust is edited by: nellshamrell, llogiq, cdmistman, ericseppanen, extrawurst, U007D, joelmarcey, mariannegoldin, bennyvasquez, bdillo

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Discuss on r/rust