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‎draft/2025-09-17-this-week-in-rust.md

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Title: This Week in Rust 617
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Number: 617
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Date: 2025-09-17
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Category: This Week in Rust
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Hello and welcome to another issue of *This Week in Rust*!
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[Rust](https://www.rust-lang.org/) is a programming language empowering everyone to build reliable and efficient software.
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This is a weekly summary of its progress and community.
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Want something mentioned? Tag us at
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[@thisweekinrust.bsky.social](https://bsky.app/profile/thisweekinrust.bsky.social) on Bluesky or
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[@ThisWeekinRust](https://mastodon.social/@thisweekinrust) on mastodon.social, or
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[send us a pull request](https://github.com/rust-lang/this-week-in-rust).
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Want to get involved? [We love contributions](https://github.com/rust-lang/rust/blob/master/CONTRIBUTING.md).
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*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/).
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If you find any errors in this week's issue, [please submit a PR](https://github.com/rust-lang/this-week-in-rust/pulls).
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Want TWIR in your inbox? [Subscribe here](https://this-week-in-rust.us11.list-manage.com/subscribe?u=fd84c1c757e02889a9b08d289&id=0ed8b72485).
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## Updates from Rust Community
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<!--
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Dear community contributors:
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Please read README.md for guidance on submissions.
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Each submitted link should be of the form:
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* [Title of the linked Page](https://example.com/my_article)
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If you add a link to a non-text content please prefix it with `[video]` or `[audio]`:
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* [video] [Title of the linked video](https://example.com/my_video_article)
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* [audio] [Title of the linked audio file](https://example.com/my_podcast)
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If you don't know which category to use, feel free to submit a PR anyway
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and just ask the editors to select the category.
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-->
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### Official
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### Foundation
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### Newsletters
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### Project/Tooling Updates
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### Observations/Thoughts
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### Rust Walkthroughs
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### Research
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### Miscellaneous
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## Crate of the Week
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<!-- COTW goes here -->
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[Please submit your suggestions and votes for next week][submit_crate]!
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[submit_crate]: https://users.rust-lang.org/t/crate-of-the-week/2704
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## Calls for Testing
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An important step for feature implementation is for people to experiment with the
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implementation and give feedback, especially before stabilization.
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If you are a feature implementer and would like your feature to appear in this list, add a
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`call-for-testing` label to your RFC along with a comment providing testing instructions and/or
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guidance on which aspect(s) of the feature need testing.
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<!-- If there are new CfT items this week, use: -->
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<!--
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[Repo Name](Repo URL)
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* [<Feature name>](<Feature URL>)
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* [Testing steps](<Testing Steps URL>)
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-->
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<!-- where `Repo Name` and `Repo URL` are one of:
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[Rust](https://github.com/rust-lang/rust/labels/call-for-testing),
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[Rust language RFCs](https://github.com/rust-lang/rfcs/issues?q=label%3Acall-for-testing),
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[Cargo](https://github.com/rust-lang/cargo/labels/call-for-testing) or
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[Rustup](https://github.com/rust-lang/rustup/labels/call-for-testing)
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-->
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<!-- For all `Repo Names` with no new CfT items this week: use (removing the repos for which new
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CfT items did appear, of course) -->
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<!--
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* *No calls for testing were issued this week by
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[Rust](https://github.com/rust-lang/rust/labels/call-for-testing),
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[Rust language RFCs](https://github.com/rust-lang/rfcs/issues?q=label%3Acall-for-testing),
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[Cargo](https://github.com/rust-lang/cargo/labels/call-for-testing) or
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[Rustup](https://github.com/rust-lang/rustup/labels/call-for-testing).*
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-->
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* *No calls for testing were issued this week by [Rust](https://github.com/rust-lang/rust/labels/call-for-testing),
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[Rust language RFCs](https://github.com/rust-lang/rfcs/issues?q=label%3Acall-for-testing),
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[Cargo](https://github.com/rust-lang/cargo/labels/call-for-testing) or
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[Rustup](https://github.com/rust-lang/rustup/labels/call-for-testing).*
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[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.
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-->
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### [RFCs](https://github.com/rust-lang/rfcs/issues?q=label%3Acall-for-testing)
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### [Rust](https://github.com/rust-lang/rust/labels/call-for-testing)
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### [Rustup](https://github.com/rust-lang/rustup/labels/call-for-testing)
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If you are a feature implementer and would like your RFC to appear on the above list, add the new `call-for-testing`
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label to your RFC along with a comment providing testing instructions and/or guidance on which aspect(s) of the feature
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need testing.
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## Call for Participation; projects and speakers
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### CFP - Projects
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Always wanted to contribute to open-source projects but did not know where to start?
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Every week we highlight some tasks from the Rust community for you to pick and get started!
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Some of these tasks may also have mentors available, visit the task page for more information.
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<!-- CFPs go here, use this format: * [project name - title of issue](URL to issue) -->
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<!-- * [ - ]() -->
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<!-- or if none - *No Calls for participation were submitted this week.* -->
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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)!
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[guidelines]:https://github.com/rust-lang/this-week-in-rust?tab=readme-ov-file#call-for-participation-guidelines
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### CFP - Events
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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.
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<!-- 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 -->
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<!-- or if none - *No Calls for papers or presentations were submitted this week.* -->
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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)!
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## Updates from the Rust Project
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<!-- Rust updates go here -->
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### Rust Compiler Performance Triage
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<!-- Perf results go here -->
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### [Approved RFCs](https://github.com/rust-lang/rfcs/commits/master)
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Changes to Rust follow the Rust [RFC (request for comments) process](https://github.com/rust-lang/rfcs#rust-rfcs). These
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are the RFCs that were approved for implementation this week:
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<!-- Approved RFCs go here, use this format: * [Topic](URL) -->
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<!-- or if none were approved this week, use: * *No RFCs were approved this week.* -->
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<!-- * []() -->
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<!--
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### [Approved Major Change Proposals (MCP)](https://forge.rust-lang.org/compiler/mcp.html)
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<!~~ MCPs occur infrequently, so this section is commented out by default. ~~>
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<!~~ MCPs which have been approved or rejected this week go here, use this format: * [major change accepted|rejected] [Topic](URL) ~~>
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-->
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### Final Comment Period
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Every week, [the team](https://www.rust-lang.org/team.html) announces the 'final comment period' for RFCs and key PRs
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which are reaching a decision. Express your opinions now.
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#### [RFCs](https://github.com/rust-lang/rfcs/labels/final-comment-period)
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<!-- RFCs which have entered FCP go here, use this format: * [disposition: merge|close] [Topic](URL) -->
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<!-- or if none entered FCP this week, use: * *No RFCs entered Final Comment Period this week.* -->
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<!-- * [disposition: ] []() -->
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#### Tracking Issues & PRs
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<!-- Tracking Issues which have entered FCP go here, use this format: * [disposition: merge|close] [Topic](URL) -->
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<!-- or if none entered FCP this week, use: -->
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<!-- * *No Tracking Issues or PRs entered Final Comment Period this week.* -->
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<!-- * [disposition: ] []() -->
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##### [Rust](https://github.com/rust-lang/rust/issues?q=is%3Aopen+label%3Afinal-comment-period+sort%3Aupdated-desc)
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##### [Cargo](https://github.com/rust-lang/cargo/issues?q=is%3Aopen+label%3Afinal-comment-period+sort%3Aupdated-desc)
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##### [Language Team](https://github.com/rust-lang/lang-team/issues?q=is%3Aopen+label%3Afinal-comment-period+sort%3Aupdated-desc+)
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##### [Language Reference](https://github.com/rust-lang/reference/issues?q=is%3Aopen+label%3Afinal-comment-period+sort%3Aupdated-desc)
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##### [Unsafe Code Guidelines](https://github.com/rust-lang/unsafe-code-guidelines/issues?q=is%3Aopen+label%3Afinal-comment-period+sort%3Aupdated-desc)
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#### [New and Updated RFCs](https://github.com/rust-lang/rfcs/pulls)
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<!-- New or updated RFCs go here, use this format: * [new|updated] [Topic](URL) -->
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<!-- or if there are no new or updated RFCs this week, use: -->
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<!-- * *No New or Updated RFCs were created this week.* -->
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<!-- * [new|updated] []() -->
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## Upcoming Events
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Rusty Events between 2025-09-17 - 2025-10-15 🦀
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### Virtual
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* 2025-09-11 | Virtual (Berlin, DE) | [Rust Berlin](https://www.meetup.com/rust-berlin/events/)
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* [**Rust Hack and Learn**](https://www.meetup.com/rust-berlin/events/305646019)
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* 2025-09-11 | Virtual (San Diego, CA, US) | [San Diego Rust](https://www.meetup.com/san-diego-rust/events/)
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* [**San Diego Rust September 2025 Online Meetup**](https://www.meetup.com/san-diego-rust/events/310326567)
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* 2025-09-14 | Virtual (Dallas, TX, US) | [Dallas Rust User Meetup](https://www.meetup.com/dallasrust/events/)
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* [**Rust Readers Discord Discussion: Rust Atomics and Locks**](https://www.meetup.com/dallasrust/events/310002480)
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* 2025-09-15 | Virtual (Charlottesville, VA, US) | [Charlottesville Rust Meetup](https://www.meetup.com/charlottesville-rust-meetup/events/)
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* [**Setup Tock OS in a virtual environment (online) - prep for Sep 17**](https://www.meetup.com/charlottesville-rust-meetup/events/310706165/)
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* 2025-09-16 | Virtual (Washington, DC, US) | [Rust DC](https://www.meetup.com/rustdc/events/)
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* [**Mid-month Rustful**](https://www.meetup.com/rustdc/events/306757758)
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* 2025-09-17 | Virtual (Vancouver, BC, CA) | [Vancouver Rust](https://www.meetup.com/vancouver-rust/events/)
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* [**Rust Study/Hack/Hang-out**](https://www.meetup.com/vancouver-rust/events/307731033)
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* 2025-09-18 | Virtual (Nürnberg, DE) | [Rust Nuremberg](https://www.meetup.com/rust-noris/events/)
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* [**Rust Nürnberg online**](https://www.meetup.com/rust-noris/events/305646039/)
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* 2025-09-23 | Virtual (Dallas, TX, US) | [Dallas Rust User Meetup](https://www.meetup.com/dallasrust/events/)
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* [**Fourth Tuesday**](https://www.meetup.com/dallasrust/events/305361443)
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* 2025-09-25 | Virtual (Berlin, DE) | [Rust Berlin](https://www.meetup.com/rust-berlin/events/)
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* [**Rust Hack and Learn**](https://www.meetup.com/rust-berlin/events/306046637)
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* 2025-10-01 | Virtual (Indianapolis, IN, US) | [Indy Rust](https://www.meetup.com/indyrs/events/)
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* [**Indy.rs - with Social Distancing**](https://www.meetup.com/indyrs/events/wqzhftyhcnbcb)
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### Asia
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* 2025-09-13 | Hangzhou, CN | [WebAssembly and Rust Meetup (Wasm Empowering AI)](https://www.meetup.com/wasm-rust-meetup/events/)
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* [**GOSIM AI Hangzhou 2025 (CFP is still open)**](https://www.meetup.com/wasm-rust-meetup/events/309987624)
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* 2025-09-13 - 2025-09-14 | Hangzhou, CN | [GOSIM](https://hangzhou2025.gosim.org/schedule/)
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* [**GOSIM Hangzhou 2025**](https://dev.events/conferences/rust-global-china-and-rust-china-conf-2025-dscrf0e1)
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* 2025-09-17 | Tel Aviv-yafo, IL | [Rust 🦀 TLV](https://www.meetup.com/rust-tlv/events/)
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* [**In person Rust September 2025 at Varonis in Herzeliya**](https://www.meetup.com/rust-tlv/events/310708628)
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* 2025-10-02 | Seoul, KR | [Seoul Rust (Programming Language) Meetup](https://www.meetup.com/rust-seoul-meetup/events/)
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* [**Seoul Rust Meetup**](https://www.meetup.com/rust-seoul-meetup/events/310824483)
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### Europe
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* 2025-09-10 | Köln, DE | [Rust Cologne](https://www.meetup.com/rust-cologne-bonn/events/)
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* [**Rust in September: Atomic Rust**](https://www.meetup.com/rustcologne/events/310858679)
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* 2025-09-10 | Reading, UK | [Reading Rust Workshop](https://www.meetup.com/reading-rust-workshop)
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* [**Reading Rust Meetup**](https://www.meetup.com/reading-rust-workshop/events/308944038)
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* 2025-09-11 | Bern, CH | [Rust Bern](https://www.meetup.com/rust-bern/events/)
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* [**2025 Rust Talks Bern #4 @Zühlke**](https://www.meetup.com/rust-bern/events/309903540)
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* 2025-09-16 - 2025-09-18 | Berlin, DE | [Oxidize Conference](https://oxidizeconf.com/)
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* [**Oxidize Conference**](https://oxidizeconf.com/)
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* 2025-09-16 | Leipzig, DE | [Rust - Modern Systems Programming in Leipzig](https://www.meetup.com/rust-modern-systems-programming-in-leipzig/events/)
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* [**Topic TBD**](https://www.meetup.com/rust-modern-systems-programming-in-leipzig/events/308592250)
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* 2025-09-17 | Girona, ES | [Rust Girona](https://lu.ma/rust-girona) | [Silicon Girona](https://silicongirona.club)
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* [**Rust Girona Hack & Learn 09 2025**](https://lu.ma/ql3u6q5u)
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* 2025-09-18 | Aarhus, DK | [Rust Aarhus](https://www.meetup.com/rust-aarhus/events/)
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* [**Talk Night at Mjølner Informatics**](https://www.meetup.com/rust-aarhus/events/310562343)
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* 2025-09-23 | Paris, FR | [Rust Paris](https://www.meetup.com/rust-paris/events/)
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* [**Rust meetup #78**](https://www.meetup.com/rust-paris/events/310935603)
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* 2025-09-24 | Göteborg, SE | [Rust Göteborg](https://www.meetup.com/rustgbg/events/)
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* [**Rust Gbg — September 2025**](https://www.meetup.com/rustgbg/events/310866773)
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* 2025-09-24 | München, DE | [Rust Munich](https://www.meetup.com/rust-munich/events/)
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* [**Rust Munich 2025 / 3 - hybrid**](https://www.meetup.com/rust-munich/events/307105978)
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* 2025-09-25 | Augsburg, DE | [Rust Augsburg](https://rust-augsburg.github.io/meetup/introduction.html)
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* [**Augsburg Rust Meetup #15**](https://rust-augsburg.github.io/meetup/Meetup_15.html)
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* 2025-10-01 | Olomouc, CZ | [Rust Moravia](https://www.meetup.com/rust-moravia/events/)
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* [**4. Rust Moravia Meetup (In the capital!)**](https://www.meetup.com/rust-moravia/events/310743282)
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* 2025-10-02 | Oslo, NO | [Rust Oslo](https://www.meetup.com/rust-oslo/events/)
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* [**Rust Hack'n'Learn at Kampen Bistro**](https://www.meetup.com/rust-oslo/events/310062134)
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* 2025-10-08 | Paris, FR | [Rust Paris](https://www.meetup.com/rust-paris/events/)
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* [**Rust meetup #79**](https://www.meetup.com/rust-paris/events/310424476)
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* 2025-10-08 | Reading, UK | [Reading Rust Workshop](https://www.meetup.com/reading-rust-workshop/events/)
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* [**Reading Rust Meetup**](https://www.meetup.com/reading-rust-workshop/events/308944041)
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### North America
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* 2025-09-10 | Phoenix, AZ, US | [Desert Rust](https://www.meetup.com/desert-rustaceans/events/)
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* [**Rust <> JS**](https://www.meetup.com/desert-rustaceans/events/310669989)
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* 2025-09-11 | Chicago, IL, US | [Chicago Rust Meetup](https://www.meetup.com/chicago-rust-meetup/events/)
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* [**Rust Happy Hour**](https://www.meetup.com/chicago-rust-meetup/events/310840020)
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* 2025-09-11 | Lehi, UT, US | [Utah Rust](https://www.meetup.com/utah-rust/events/)
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* [**Mazes and Graphs in Rust**](https://www.meetup.com/utah-rust/events/310674937)
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* 2025-09-11 | México City, MX | [Rust MX](https://www.meetup.com/rust-mx/events/)
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* [**Polars para análisis y manipulación de datos**](https://www.meetup.com/rust-mx/events/310408223)
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* 2025-09-14 | Boston, MA, US | [Boston Rust Meetup](https://www.meetup.com/bostonrust/events/)
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* [**Davis Square Rust Lunch, Sep 14**](https://www.meetup.com/bostonrust/events/310106317)
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* 2025-09-16 | San Francisco, CA, US | [San Francisco Rust Study Group](https://www.meetup.com/san-francisco-rust-study-group/events/)
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* [**Rust Hacking in Person**](https://www.meetup.com/san-francisco-rust-study-group/events/308284339)
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* 2025-09-16 | San Francisco, CA, US | [Vara Network](https://lu.ma/events-by-vara-gear)
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* [**Rust Workshop by Vara Network**](https://luma.com/1bii0kv7)
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* 2025-09-18 | Nashville, TN, US | [Music City Rust Developers](https://www.meetup.com/music-city-rust-developers/events/)
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* [**Rust on Bare Metal Series 3 : Place Holder**](https://www.meetup.com/music-city-rust-developers/events/304333261)
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* 2025-09-18 | Seattle, WA, US | [Seattle Rust User Group](https://www.meetup.com/join-srug/events/)
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* [**September, 2025 SRUG (Seattle Rust User Group) Meetup**](https://www.meetup.com/seattle-rust-user-group/events/308677324)
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* 2025-09-24 | Austin, TX, US | [Rust ATX](https://www.meetup.com/rust-atx/events/)
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* [**Rust Lunch - Fareground**](https://www.meetup.com/rust-atx/events/310287849)
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* 2025-09-24 | Charlottesville, VA, US | [Charlottesville Rust Meetup](https://www.meetup.com/charlottesville-rust-meetup/events/)
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* [**Tick, Tock, talk—find out how Rust secures embedded devices**](https://www.meetup.com/charlottesville-rust-meetup/events/310603587)
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* 2025-09-25 | Atlanta, GA, US | [Rust Atlanta](https://www.meetup.com/rust-atl/events/)
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* [**Rust-Atl At Manuels Tavern**](https://www.meetup.com/rust-atl/events/308675983)
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* 2025-10-02 | Saint Louis, MO, US | [STL Rust](https://www.meetup.com/stl-rust/events/)
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* [**🚁 Rust in Flight: Lessons from Designing a 3D‑Printed Quadcopter with Embedded**](https://www.meetup.com/stl-rust/events/310279407)
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### Oceania:
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* 2025-10-01 | Perth, WA, AU | [Rust Perth Meetup Group](https://www.meetup.com/perth-rust-meetup-group/events/)
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* [**October Meetup**](https://www.meetup.com/perth-rust-meetup-group/events/310847099)
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If you are running a Rust event please add it to the [calendar] to get
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it mentioned here. Please remember to add a link to the event too.
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Email the [Rust Community Team][community] for access.
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[calendar]: https://www.google.com/calendar/embed?src=apd9vmbc22egenmtu5l6c5jbfc%40group.calendar.google.com
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[community]: mailto:[email protected]
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## Jobs
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<!--
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Rust Jobs:
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TWiR has stopped featuring individual job postings. You can read more about this change here:
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https://github.com/rust-lang/this-week-in-rust/issues/3412
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-->
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Please see the latest [Who's Hiring thread on r/rust](INSERT_LINK_HERE)
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# Quote of the Week
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<!-- QOTW goes here -->
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[Please submit quotes and vote for next week!](https://users.rust-lang.org/t/twir-quote-of-the-week/328)
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*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)*
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*Email list hosting is sponsored by [The Rust Foundation](https://foundation.rust-lang.org/)*
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<small>[Discuss on r/rust](REDDIT_LINK_HERE)</small>

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