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323 changes: 323 additions & 0 deletions draft/2025-09-17-this-week-in-rust.md
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Title: This Week in Rust 617
Number: 617
Date: 2025-09-17
Category: This Week in Rust

Hello and welcome to another issue of *This Week in Rust*!
[Rust](https://www.rust-lang.org/) 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](https://bsky.app/profile/thisweekinrust.bsky.social) on Bluesky or
[@ThisWeekinRust](https://mastodon.social/@thisweekinrust) on mastodon.social, or
[send us a pull request](https://github.com/rust-lang/this-week-in-rust).
Want to get involved? [We love contributions](https://github.com/rust-lang/rust/blob/master/CONTRIBUTING.md).

*This Week in Rust* is openly developed [on GitHub](https://github.com/rust-lang/this-week-in-rust) and archives can be viewed at [this-week-in-rust.org](https://this-week-in-rust.org/).
If you find any errors in this week's issue, [please submit a PR](https://github.com/rust-lang/this-week-in-rust/pulls).

Want TWIR in your inbox? [Subscribe here](https://this-week-in-rust.us11.list-manage.com/subscribe?u=fd84c1c757e02889a9b08d289&id=0ed8b72485).

## Updates from Rust Community

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and just ask the editors to select the category.

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### Official

### Foundation

### Newsletters

### Project/Tooling Updates

### Observations/Thoughts

### Rust Walkthroughs

### Research

### Miscellaneous

## Crate of the Week

<!-- COTW goes here -->

[Please submit your suggestions and votes for next week][submit_crate]!

[submit_crate]: https://users.rust-lang.org/t/crate-of-the-week/2704

## Calls for Testing
An important step for feature 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 feature 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.

<!-- If there are new CfT items this week, use: -->
<!--
[Repo Name](Repo URL)
* [<Feature name>](<Feature URL>)
* [Testing steps](<Testing Steps URL>)
-->
<!-- where `Repo Name` and `Repo URL` are one of:
[Rust](https://github.com/rust-lang/rust/labels/call-for-testing),
[Rust language RFCs](https://github.com/rust-lang/rfcs/issues?q=label%3Acall-for-testing),
[Cargo](https://github.com/rust-lang/cargo/labels/call-for-testing) or
[Rustup](https://github.com/rust-lang/rustup/labels/call-for-testing)
-->

<!-- For all `Repo Names` with no new CfT items this week: use (removing the repos for which new
CfT items did appear, of course) -->
<!--
* *No calls for testing were issued this week by
[Rust](https://github.com/rust-lang/rust/labels/call-for-testing),
[Rust language RFCs](https://github.com/rust-lang/rfcs/issues?q=label%3Acall-for-testing),
[Cargo](https://github.com/rust-lang/cargo/labels/call-for-testing) or
[Rustup](https://github.com/rust-lang/rustup/labels/call-for-testing).*
-->
* *No calls for testing were issued this week by [Rust](https://github.com/rust-lang/rust/labels/call-for-testing),
[Rust language RFCs](https://github.com/rust-lang/rfcs/issues?q=label%3Acall-for-testing),
[Cargo](https://github.com/rust-lang/cargo/labels/call-for-testing) or
[Rustup](https://github.com/rust-lang/rustup/labels/call-for-testing).*

[Let us know](https://github.com/rust-lang/this-week-in-rust/issues) if you would like your feature to be tracked as a part of this list.
-->

### [RFCs](https://github.com/rust-lang/rfcs/issues?q=label%3Acall-for-testing)

### [Rust](https://github.com/rust-lang/rust/labels/call-for-testing)

### [Rustup](https://github.com/rust-lang/rustup/labels/call-for-testing)

If you are a feature implementer and would like your RFC to appear on the above list, add the new `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.

## 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.

<!-- CFPs go here, use this format: * [project name - title of issue](URL to issue) -->
<!-- * [ - ]() -->
<!-- or if none - *No Calls for participation were submitted this week.* -->

If you are a Rust project owner and are looking for contributors, please submit tasks [here][guidelines] or through a [PR to TWiR](https://github.com/rust-lang/this-week-in-rust) or by reaching out on [X (formerly Twitter)](https://x.com/ThisWeekInRust) or [Mastodon](https://mastodon.social/@thisweekinrust)!

[guidelines]:https://github.com/rust-lang/this-week-in-rust?tab=readme-ov-file#call-for-participation-guidelines

### 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.

<!-- CFPs go here, use this format: * [**event name**](URL to CFP)| Date CFP closes in YYYY-MM-DD | city,state,country | Date of event in YYYY-MM-DD -->
<!-- or if none - *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](https://github.com/rust-lang/this-week-in-rust) or by reaching out on [X (formerly Twitter)](https://x.com/ThisWeekInRust) or [Mastodon](https://mastodon.social/@thisweekinrust)!

## Updates from the Rust Project

<!-- Rust updates go here -->

### Rust Compiler Performance Triage

<!-- Perf results go here -->

### [Approved RFCs](https://github.com/rust-lang/rfcs/commits/master)

Changes to Rust follow the Rust [RFC (request for comments) process](https://github.com/rust-lang/rfcs#rust-rfcs). These
are the RFCs that were approved for implementation this week:

<!-- Approved RFCs go here, use this format: * [Topic](URL) -->
<!-- or if none were approved this week, use: * *No RFCs were approved this week.* -->
<!-- * []() -->

<!--
### [Approved Major Change Proposals (MCP)](https://forge.rust-lang.org/compiler/mcp.html)
<!~~ MCPs occur infrequently, so this section is commented out by default. ~~>
<!~~ MCPs which have been approved or rejected this week go here, use this format: * [major change accepted|rejected] [Topic](URL) ~~>
-->

### Final Comment Period

Every week, [the team](https://www.rust-lang.org/team.html) announces the 'final comment period' for RFCs and key PRs
which are reaching a decision. Express your opinions now.

#### [RFCs](https://github.com/rust-lang/rfcs/labels/final-comment-period)
<!-- RFCs which have entered FCP go here, use this format: * [disposition: merge|close] [Topic](URL) -->
<!-- or if none entered FCP this week, use: * *No RFCs entered Final Comment Period this week.* -->
<!-- * [disposition: ] []() -->

#### Tracking Issues & PRs
<!-- Tracking Issues which have entered FCP go here, use this format: * [disposition: merge|close] [Topic](URL) -->
<!-- or if none entered FCP this week, use: -->
<!-- * *No Tracking Issues or PRs entered Final Comment Period this week.* -->
<!-- * [disposition: ] []() -->

##### [Rust](https://github.com/rust-lang/rust/issues?q=is%3Aopen+label%3Afinal-comment-period+sort%3Aupdated-desc)

##### [Cargo](https://github.com/rust-lang/cargo/issues?q=is%3Aopen+label%3Afinal-comment-period+sort%3Aupdated-desc)

##### [Language Team](https://github.com/rust-lang/lang-team/issues?q=is%3Aopen+label%3Afinal-comment-period+sort%3Aupdated-desc+)

##### [Language Reference](https://github.com/rust-lang/reference/issues?q=is%3Aopen+label%3Afinal-comment-period+sort%3Aupdated-desc)

##### [Unsafe Code Guidelines](https://github.com/rust-lang/unsafe-code-guidelines/issues?q=is%3Aopen+label%3Afinal-comment-period+sort%3Aupdated-desc)

#### [New and Updated RFCs](https://github.com/rust-lang/rfcs/pulls)
<!-- New or updated RFCs go here, use this format: * [new|updated] [Topic](URL) -->
<!-- or if there are no new or updated RFCs this week, use: -->
<!-- * *No New or Updated RFCs were created this week.* -->
<!-- * [new|updated] []() -->

## Upcoming Events

Rusty Events between 2025-09-17 - 2025-10-15 🦀

### Virtual
* 2025-09-11 | Virtual (Berlin, DE) | [Rust Berlin](https://www.meetup.com/rust-berlin/events/)
* [**Rust Hack and Learn**](https://www.meetup.com/rust-berlin/events/305646019)
* 2025-09-11 | Virtual (San Diego, CA, US) | [San Diego Rust](https://www.meetup.com/san-diego-rust/events/)
* [**San Diego Rust September 2025 Online Meetup**](https://www.meetup.com/san-diego-rust/events/310326567)
* 2025-09-14 | Virtual (Dallas, TX, US) | [Dallas Rust User Meetup](https://www.meetup.com/dallasrust/events/)
* [**Rust Readers Discord Discussion: Rust Atomics and Locks**](https://www.meetup.com/dallasrust/events/310002480)
* 2025-09-15 | Virtual (Charlottesville, VA, US) | [Charlottesville Rust Meetup](https://www.meetup.com/charlottesville-rust-meetup/events/)
* [**Setup Tock OS in a virtual environment (online) - prep for Sep 17**](https://www.meetup.com/charlottesville-rust-meetup/events/310706165/)
* 2025-09-16 | Virtual (Washington, DC, US) | [Rust DC](https://www.meetup.com/rustdc/events/)
* [**Mid-month Rustful**](https://www.meetup.com/rustdc/events/306757758)
* 2025-09-17 | Virtual (Vancouver, BC, CA) | [Vancouver Rust](https://www.meetup.com/vancouver-rust/events/)
* [**Rust Study/Hack/Hang-out**](https://www.meetup.com/vancouver-rust/events/307731033)
* 2025-09-18 | Virtual (Nürnberg, DE) | [Rust Nuremberg](https://www.meetup.com/rust-noris/events/)
* [**Rust Nürnberg online**](https://www.meetup.com/rust-noris/events/305646039/)
* 2025-09-23 | Virtual (Dallas, TX, US) | [Dallas Rust User Meetup](https://www.meetup.com/dallasrust/events/)
* [**Fourth Tuesday**](https://www.meetup.com/dallasrust/events/305361443)
* 2025-09-25 | Virtual (Berlin, DE) | [Rust Berlin](https://www.meetup.com/rust-berlin/events/)
* [**Rust Hack and Learn**](https://www.meetup.com/rust-berlin/events/306046637)
* 2025-10-01 | Virtual (Indianapolis, IN, US) | [Indy Rust](https://www.meetup.com/indyrs/events/)
* [**Indy.rs - with Social Distancing**](https://www.meetup.com/indyrs/events/wqzhftyhcnbcb)

### Asia
* 2025-09-13 | Hangzhou, CN | [WebAssembly and Rust Meetup (Wasm Empowering AI)](https://www.meetup.com/wasm-rust-meetup/events/)
* [**GOSIM AI Hangzhou 2025 (CFP is still open)**](https://www.meetup.com/wasm-rust-meetup/events/309987624)
* 2025-09-13 - 2025-09-14 | Hangzhou, CN | [GOSIM](https://hangzhou2025.gosim.org/schedule/)
* [**GOSIM Hangzhou 2025**](https://dev.events/conferences/rust-global-china-and-rust-china-conf-2025-dscrf0e1)
* 2025-09-17 | Tel Aviv-yafo, IL | [Rust 🦀 TLV](https://www.meetup.com/rust-tlv/events/)
* [**In person Rust September 2025 at Varonis in Herzeliya**](https://www.meetup.com/rust-tlv/events/310708628)
* 2025-10-02 | Seoul, KR | [Seoul Rust (Programming Language) Meetup](https://www.meetup.com/rust-seoul-meetup/events/)
* [**Seoul Rust Meetup**](https://www.meetup.com/rust-seoul-meetup/events/310824483)

### Europe
* 2025-09-10 | Köln, DE | [Rust Cologne](https://www.meetup.com/rust-cologne-bonn/events/)
* [**Rust in September: Atomic Rust**](https://www.meetup.com/rustcologne/events/310858679)
* 2025-09-10 | Reading, UK | [Reading Rust Workshop](https://www.meetup.com/reading-rust-workshop)
* [**Reading Rust Meetup**](https://www.meetup.com/reading-rust-workshop/events/308944038)
* 2025-09-11 | Bern, CH | [Rust Bern](https://www.meetup.com/rust-bern/events/)
* [**2025 Rust Talks Bern #4 @Zühlke**](https://www.meetup.com/rust-bern/events/309903540)
* 2025-09-16 - 2025-09-18 | Berlin, DE | [Oxidize Conference](https://oxidizeconf.com/)
* [**Oxidize Conference**](https://oxidizeconf.com/)
* 2025-09-16 | Leipzig, DE | [Rust - Modern Systems Programming in Leipzig](https://www.meetup.com/rust-modern-systems-programming-in-leipzig/events/)
* [**Topic TBD**](https://www.meetup.com/rust-modern-systems-programming-in-leipzig/events/308592250)
* 2025-09-17 | Girona, ES | [Rust Girona](https://lu.ma/rust-girona) | [Silicon Girona](https://silicongirona.club)
* [**Rust Girona Hack & Learn 09 2025**](https://lu.ma/ql3u6q5u)
* 2025-09-18 | Aarhus, DK | [Rust Aarhus](https://www.meetup.com/rust-aarhus/events/)
* [**Talk Night at Mjølner Informatics**](https://www.meetup.com/rust-aarhus/events/310562343)
* 2025-09-23 | Paris, FR | [Rust Paris](https://www.meetup.com/rust-paris/events/)
* [**Rust meetup #78**](https://www.meetup.com/rust-paris/events/310935603)
* 2025-09-24 | Göteborg, SE | [Rust Göteborg](https://www.meetup.com/rustgbg/events/)
* [**Rust Gbg — September 2025**](https://www.meetup.com/rustgbg/events/310866773)
* 2025-09-24 | München, DE | [Rust Munich](https://www.meetup.com/rust-munich/events/)
* [**Rust Munich 2025 / 3 - hybrid**](https://www.meetup.com/rust-munich/events/307105978)
* 2025-09-25 | Augsburg, DE | [Rust Augsburg](https://rust-augsburg.github.io/meetup/introduction.html)
* [**Augsburg Rust Meetup #15**](https://rust-augsburg.github.io/meetup/Meetup_15.html)
* 2025-10-01 | Olomouc, CZ | [Rust Moravia](https://www.meetup.com/rust-moravia/events/)
* [**4. Rust Moravia Meetup (In the capital!)**](https://www.meetup.com/rust-moravia/events/310743282)
* 2025-10-02 | Oslo, NO | [Rust Oslo](https://www.meetup.com/rust-oslo/events/)
* [**Rust Hack'n'Learn at Kampen Bistro**](https://www.meetup.com/rust-oslo/events/310062134)
* 2025-10-08 | Paris, FR | [Rust Paris](https://www.meetup.com/rust-paris/events/)
* [**Rust meetup #79**](https://www.meetup.com/rust-paris/events/310424476)
* 2025-10-08 | Reading, UK | [Reading Rust Workshop](https://www.meetup.com/reading-rust-workshop/events/)
* [**Reading Rust Meetup**](https://www.meetup.com/reading-rust-workshop/events/308944041)

### North America
* 2025-09-10 | Phoenix, AZ, US | [Desert Rust](https://www.meetup.com/desert-rustaceans/events/)
* [**Rust <> JS**](https://www.meetup.com/desert-rustaceans/events/310669989)
* 2025-09-11 | Chicago, IL, US | [Chicago Rust Meetup](https://www.meetup.com/chicago-rust-meetup/events/)
* [**Rust Happy Hour**](https://www.meetup.com/chicago-rust-meetup/events/310840020)
* 2025-09-11 | Lehi, UT, US | [Utah Rust](https://www.meetup.com/utah-rust/events/)
* [**Mazes and Graphs in Rust**](https://www.meetup.com/utah-rust/events/310674937)
* 2025-09-11 | México City, MX | [Rust MX](https://www.meetup.com/rust-mx/events/)
* [**Polars para análisis y manipulación de datos**](https://www.meetup.com/rust-mx/events/310408223)
* 2025-09-14 | Boston, MA, US | [Boston Rust Meetup](https://www.meetup.com/bostonrust/events/)
* [**Davis Square Rust Lunch, Sep 14**](https://www.meetup.com/bostonrust/events/310106317)
* 2025-09-16 | San Francisco, CA, US | [San Francisco Rust Study Group](https://www.meetup.com/san-francisco-rust-study-group/events/)
* [**Rust Hacking in Person**](https://www.meetup.com/san-francisco-rust-study-group/events/308284339)
* 2025-09-16 | San Francisco, CA, US | [Vara Network](https://lu.ma/events-by-vara-gear)
* [**Rust Workshop by Vara Network**](https://luma.com/1bii0kv7)
* 2025-09-18 | Nashville, TN, US | [Music City Rust Developers](https://www.meetup.com/music-city-rust-developers/events/)
* [**Rust on Bare Metal Series 3 : Place Holder**](https://www.meetup.com/music-city-rust-developers/events/304333261)
* 2025-09-18 | Seattle, WA, US | [Seattle Rust User Group](https://www.meetup.com/join-srug/events/)
* [**September, 2025 SRUG (Seattle Rust User Group) Meetup**](https://www.meetup.com/seattle-rust-user-group/events/308677324)
* 2025-09-24 | Austin, TX, US | [Rust ATX](https://www.meetup.com/rust-atx/events/)
* [**Rust Lunch - Fareground**](https://www.meetup.com/rust-atx/events/310287849)
* 2025-09-24 | Charlottesville, VA, US | [Charlottesville Rust Meetup](https://www.meetup.com/charlottesville-rust-meetup/events/)
* [**Tick, Tock, talk—find out how Rust secures embedded devices**](https://www.meetup.com/charlottesville-rust-meetup/events/310603587)
* 2025-09-25 | Atlanta, GA, US | [Rust Atlanta](https://www.meetup.com/rust-atl/events/)
* [**Rust-Atl At Manuels Tavern**](https://www.meetup.com/rust-atl/events/308675983)
* 2025-10-02 | Saint Louis, MO, US | [STL Rust](https://www.meetup.com/stl-rust/events/)
* [**🚁 Rust in Flight: Lessons from Designing a 3D‑Printed Quadcopter with Embedded**](https://www.meetup.com/stl-rust/events/310279407)

### Oceania:
* 2025-10-01 | Perth, WA, AU | [Rust Perth Meetup Group](https://www.meetup.com/perth-rust-meetup-group/events/)
* [**October Meetup**](https://www.meetup.com/perth-rust-meetup-group/events/310847099)

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][community] for access.

[calendar]: https://www.google.com/calendar/embed?src=apd9vmbc22egenmtu5l6c5jbfc%40group.calendar.google.com
[community]: mailto:[email protected]

## Jobs
<!--

Rust Jobs:

TWiR has stopped featuring individual job postings. You can read more about this change here:

https://github.com/rust-lang/this-week-in-rust/issues/3412

-->

Please see the latest [Who's Hiring thread on r/rust](INSERT_LINK_HERE)

# Quote of the Week

<!-- QOTW goes here -->

[Please submit quotes and vote for next week!](https://users.rust-lang.org/t/twir-quote-of-the-week/328)

*This Week in Rust is edited by: [nellshamrell](https://github.com/nellshamrell), [llogiq](https://github.com/llogiq), [cdmistman](https://github.com/cdmistman), [ericseppanen](https://github.com/ericseppanen), [extrawurst](https://github.com/extrawurst), [U007D](https://github.com/U007D), [joelmarcey](https://github.com/joelmarcey), [mariannegoldin](https://github.com/mariannegoldin), [bennyvasquez](https://github.com/bennyvasquez), [bdillo](https://github.com/bdillo)*

*Email list hosting is sponsored by [The Rust Foundation](https://foundation.rust-lang.org/)*

<small>[Discuss on r/rust](REDDIT_LINK_HERE)</small>