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Title: This Week in Rust 579
Number: 579
Date: 2024-12-25
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](https://x.com/ThisWeekInRust) on X (formerly Twitter) 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
<!--
Dear community contributors:
Please read README.md for guidance on submissions.
Each submitted link should be of the form:
* [Title of the Linked Page](https://example.com/my_article)
If you don't know which category to use, feel free to submit a PR anyway
and just ask the editors to select the category.
-->
### Newsletters
* [The Embedded Rustacean Issue #35](https://www.theembeddedrustacean.com/p/the-embedded-rustacean-issue-35)
* [Rust Trends Issue #56](https://rust-trends.com/newsletter/unlocking-new-insights-and-opportunities-in-rust/)
### Project/Tooling Updates
* [musi lili retro game engine 0.1 released](https://crates.io/crates/musi_lili)
* [Nutype 0.5.1: better no_std support and bug fixes](https://github.com/greyblake/nutype/releases/tag/v0.5.1)
* [Ibis 0.2.0 - Federated Wiki with Shiny Redesign, based on Diesel, Actix and Leptos](https://ibis.wiki/article/Ibis_release_0.2.0_-_Federated_Wiki_with_Shiny_Redesign@ibis.wiki)
* [dagrs 0.4.2 - Flow-based Programming in Rust](https://crates.io/crates/dagrs)
* [Avian Physics 0.2](https://joonaa.dev/blog/07/avian-0-2)
* [Slint 1.9](https://slint.dev/blog/slint-1.9-released)
* [gitoxide - december 2024](https://github.com/GitoxideLabs/gitoxide/discussions/1738)
### Observations/Thoughts
* [Dropping Hyper](https://daniel.haxx.se/blog/2024/12/21/dropping-hyper/)
* [Embedding Lua in sqleibniz with Rust](https://xnacly.me/posts/2024/embed-lua-in-rust/)
* [What would it take to add refinement types to Rust?](https://yoric.github.io/post/rust-refinement-types/)
* [Context-Generic Programming](https://contextgeneric.dev/blog/early-preview-announcement/)
* [Building a Secure Hierarchical Key Derivation System in Rust](https://medium.com/@evadawnley/building-a-secure-hierarchical-key-derivation-system-in-rust-b5a0ecee18d7)
* [Streamlined dataflow analysis code in rustc](https://nnethercote.github.io/2024/12/19/streamlined-dataflow-analysis-code-in-rustc.html)
* [Four limitations of Rust’s borrow checker](https://blog.polybdenum.com/2024/12/21/four-limitations-of-rust-s-borrow-checker.html)
* [A Review of Rust in 2024: What Next?](https://barretts.club/posts/rust_review_2024/)
* [My actions-rust-cross Action Now Has Built-In Caching](https://blog.urth.org/2024/12/21/my-actions-rust-cross-action-now-has-built-in-caching/)
* [Transforming Rust Development: How Windsurf AI Tripled Productivity](https://neoexogenesis.com/posts/rust-windsurf-transformation/)
### Rust Walkthroughs
* [How to build and publish multi-platform Rust binaries via Github actions](https://rakhim.exotext.com/how-to-build-and-publish-multi-platform-rust-binaries)
* [Compiling C to Safe Rust, Formalized](https://arxiv.org/abs/2412.15042)
* [Unnecessary Optimization in Rust: Hamming Distances, SIMD, and Auto-Vectorization](https://emschwartz.me/unnecessary-optimization-in-rust-hamming-distances-simd-and-auto-vectorization/)
### Miscellaneous
* [Rust university course exercises](https://kobzol.github.io/teaching/2024/12/18/rust-exercises.html)
* [video] [The SQLite Rewrite In Rust](https://www.youtube.com/watch?v=PPjXM8G8ax0)
## Crate of the Week
This week's crate is [OmniLED](https://github.com/llMBQll/OmniLED), a helper to display things like time or audio volumne on a LED matrix that some peripherials (such as gaming keyboards) have.
Thanks to [llogiq](https://users.rust-lang.org/t/crate-of-the-week/2704/1383) for the suggestion!
[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 RFC implementation is for people to experiment with the
implementation and give feedback, especially before stabilization. The following
RFCs would benefit from user testing before moving forward:
### [RFCs](https://github.com/rust-lang/rfcs/issues?q=label%3Acall-for-testing)
* *No calls for testing were issued this week.*
### [Rust](https://github.com/rust-lang/rust/labels/call-for-testing)
* *No calls for testing were issued this week.*
### [Rustup](https://github.com/rust-lang/rustup/labels/call-for-testing)
* [CfT: Test out Rustup's `reqwest` backend with `rustls`](https://github.com/rust-lang/rustup/issues/3806)
- [Testing steps](https://github.com/rust-lang/rustup/issues/3806#issue-2278962476)
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.* -->
* [Rama — provide constants for common (network) hosts to rama-net's Host](https://github.com/plabayo/rama/issues/363)
* [Rama — support vec/array impl for DnsResolver](https://github.com/plabayo/rama/issues/332)
* [Rama — support HAR exporter (http) layer in rama](https://github.com/plabayo/rama/issues/357)
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
398 pull requests were [merged in the last week][merged]
[merged]: https://github.com/search?q=is%3Apr+org%3Arust-lang+is%3Amerged+merged%3A2024-12-17..2024-12-24
* [-Znext-solver: modify candidate preference rules](https://github.com/rust-lang/rust/pull/133643)
* [`Variants::Single`: do not use invalid VariantIdx for uninhabited enums](https://github.com/rust-lang/rust/pull/133702)
* [`rustc_borrowck`: Suggest changing `&raw const` to `&raw mut` if applicable](https://github.com/rust-lang/rust/pull/134397)
* [abstract `ProcThreadAttributeList` into its own `struct`](https://github.com/rust-lang/rust/pull/123604)
* [add `--doctest-compilation-args` option to add compilation flags to doctest compilation](https://github.com/rust-lang/rust/pull/128780)
* [add `ignore-rustc-debug-assertions` to `tests/ui/associated-consts/issue-93775.rs`](https://github.com/rust-lang/rust/pull/134608)
* [align `{i686,x86_64}-win7-windows-msvc` to their parent targets](https://github.com/rust-lang/rust/pull/134611)
* [also lint on option of function pointer comparisons](https://github.com/rust-lang/rust/pull/134586)
* [always run `tail_expr_drop_order` lint in promoted MIR query](https://github.com/rust-lang/rust/pull/134493)
* [begin to implement type system layer of unsafe binders](https://github.com/rust-lang/rust/pull/134625)
* [cleanup `TypeVerifier`](https://github.com/rust-lang/rust/pull/134465)
* [cleanup region handling: add `LateParamRegionKind`](https://github.com/rust-lang/rust/pull/133961)
* [correctly note item kind in `NonConstFunctionCall` error message](https://github.com/rust-lang/rust/pull/134701)
* [coverage: dismantle `map_data.rs` by moving its responsibilities elsewhere](https://github.com/rust-lang/rust/pull/134323)
* [coverage: store coverage source regions as `Span` until codegen (take 2)](https://github.com/rust-lang/rust/pull/134497)
* [detect invalid exprs in parser used by pretty-printer tests](https://github.com/rust-lang/rust/pull/134599)
* [detect missing `.` in method chain in `let` bindings and statements](https://github.com/rust-lang/rust/pull/133087)
* [don't ICE on illegal `dyn*` casts](https://github.com/rust-lang/rust/pull/134635)
* [explain why a type is not eligible for `impl PointerLike`](https://github.com/rust-lang/rust/pull/134603)
* [fix `-Z input-stats` ordering](https://github.com/rust-lang/rust/pull/134406)
* [fix const conditions for RPITITs](https://github.com/rust-lang/rust/pull/133926)
* [fix effect predicates from item bounds in old solver](https://github.com/rust-lang/rust/pull/134638)
* [fix logical error with what text is considered whitespace](https://github.com/rust-lang/rust/pull/134366)
* [fix parenthesization of chained comparisons by pretty-printer](https://github.com/rust-lang/rust/pull/134600)
* [forbid overwriting types in typeck](https://github.com/rust-lang/rust/pull/134474)
* [foundations of location-sensitive polonius](https://github.com/rust-lang/rust/pull/134268)
* [handle `DropKind::ForLint` in coroutines correctly](https://github.com/rust-lang/rust/pull/134575)
* [handle fndef rendering together with signature rendering](https://github.com/rust-lang/rust/pull/134354)
* [handle member constraints directly in the mir type checker](https://github.com/rust-lang/rust/pull/134501)
* [hide `= _` as associated constant value inside impl blocks](https://github.com/rust-lang/rust/pull/134321)
* [make sure we don't lose default `struct` value when formatting `struct`](https://github.com/rust-lang/rust/pull/134668)
* [make sure we handle `backwards_incompatible_lint` drops appropriately in drop elaboration](https://github.com/rust-lang/rust/pull/134486)
* [make sure we note ambiguity causes on positive/negative impl conflicts](https://github.com/rust-lang/rust/pull/134639)
* [move `lint_unused_mut` into sub-fn](https://github.com/rust-lang/rust/pull/134477)
* [next-solver: disable unnecessary hack](https://github.com/rust-lang/rust/pull/134574)
* [pass FnAbi to `find_mir_or_eval_fn`](https://github.com/rust-lang/rust/pull/133103)
* [point at lint name instead of whole attr for gated lints](https://github.com/rust-lang/rust/pull/134481)
* [precedence improvements: closures and jumps](https://github.com/rust-lang/rust/pull/133782)
* [promote powerpc64le-unknown-linux-musl to tier 2 with host tools](https://github.com/rust-lang/rust/pull/133801)
* [re-export more `rustc_span::symbol` things from `rustc_span`](https://github.com/rust-lang/rust/pull/134243)
* [reduce the amount of explicit `FatalError.raise()`](https://github.com/rust-lang/rust/pull/134561)
* [restrict `#[non_exaustive]` on structs with default field values](https://github.com/rust-lang/rust/pull/134539)
* [simplify `SwitchInt` handling](https://github.com/rust-lang/rust/pull/133328)
* [support pretty-printing `dyn*` trait objects](https://github.com/rust-lang/rust/pull/134601)
* [use `PtrMetadata` instead of `Len` in slice drop shims](https://github.com/rust-lang/rust/pull/134326)
* [use links to edition guide for edition migrations](https://github.com/rust-lang/rust/pull/134368)
* [win: use POSIX rename semantics for `std::fs::rename` if available](https://github.com/rust-lang/rust/pull/131072)
* [mir-opt: a sub-BB of a cleanup BB must also be a cleanup BB in `EarlyOtherwiseBranch`](https://github.com/rust-lang/rust/pull/130786)
* [miri: add `track_caller` to thread spawning methods for better backtraces](https://github.com/rust-lang/rust/pull/134560)
* [miri: add warning explaining the limitations of the native code mode](https://github.com/rust-lang/miri/pull/4098)
* [miri: implement blocking `unnamed_socket`](https://github.com/rust-lang/miri/pull/4072)
* [miri: implement many-seeds mode directly in the driver](https://github.com/rust-lang/miri/pull/4105)
* [miri: provide a way to compare benchmark results with baseline](https://github.com/rust-lang/miri/pull/4104)
* [speed up `Parser::expected_tokens`](https://github.com/rust-lang/rust/pull/133793)
* [improve `dependency_format` a bit](https://github.com/rust-lang/rust/pull/134514)
* [overhaul token cursors](https://github.com/rust-lang/rust/pull/134161)
* [fix perf regression in rustdoc after hir attributes](https://github.com/rust-lang/rust/pull/134376)
* [stabilize `#[diagnostic::do_not_recommend]`](https://github.com/rust-lang/rust/pull/132056)
* [core: fix const `ptr::swap_nonoverlapping` when there are pointers at odd offsets](https://github.com/rust-lang/rust/pull/134689)
* [add a range argument to `vec.extract_if`](https://github.com/rust-lang/rust/pull/133265)
* [optimize `is_ascii` for `str` and `[u8]` further](https://github.com/rust-lang/rust/pull/130733)
* [implement `PointerLike` for `isize`, `NonNull`, `Cell`, `UnsafeCell`, and `SyncUnsafeCell`](https://github.com/rust-lang/rust/pull/134642)
* [unimplement `PointerLike` for trait objects](https://github.com/rust-lang/rust/pull/134573)
* [hashbrown: add 128-bit SIMD implementation for LoongArch](https://github.com/rust-lang/hashbrown/pull/592)
* [compiler-builtins: fix a bug in `abs_diff`](https://github.com/rust-lang/compiler-builtins/pull/736)
* [cargo: build-std: make Resolve align to what to build](https://github.com/rust-lang/cargo/pull/14938)
* [cargo: cargo-package: add more traces](https://github.com/rust-lang/cargo/pull/14960)
* [cargo: cargo-rustc: stabilize higher precedence trailing flags](https://github.com/rust-lang/cargo/pull/14900)
* [cargo: package: show dirty filepaths relative to git workdir](https://github.com/rust-lang/cargo/pull/14968)
* [cargo: package: use relpath to cwd for vcs dirtiness report](https://github.com/rust-lang/cargo/pull/14970)
* [cargo: add the `test` cfg as a well known cfg before of compiler change](https://github.com/rust-lang/cargo/pull/14963)
* [cargo: do not hash absolute sysroot path into stdlib crates metadata](https://github.com/rust-lang/cargo/pull/14951)
* [cargo: fixed the error message for a user to open the crate](https://github.com/rust-lang/cargo/pull/14969)
* [rustfmt: fix incorrect strip r# prefix from labels](https://github.com/rust-lang/rustfmt/pull/6425)
* [clippy: add allow-indexing-slicing-in-tests option](https://github.com/rust-lang/rust-clippy/pull/13854)
* [clippy: do not mark attributes with unknown namespace as useless](https://github.com/rust-lang/rust-clippy/pull/13766)
* [clippy: don't trigger `filter_map_identity` with an iterator from an empty array](https://github.com/rust-lang/rust-clippy/pull/13826)
* [clippy: use multipart suggestion in `unnecessary_to_owned`](https://github.com/rust-lang/rust-clippy/pull/13847)
* [rust-analyzer: clear flycheck diagnostics more granularly](https://github.com/rust-lang/rust-analyzer/pull/18729)
* [rust-analyzer: fix AsmOption rule in rust.ungram](https://github.com/rust-lang/rust-analyzer/pull/18715)
* [rust-analyzer: consider both completion detail fields in `to_proto`](https://github.com/rust-lang/rust-analyzer/pull/18716)
* [rust-analyzer: delay initial flycheck until after build scripts](https://github.com/rust-lang/rust-analyzer/pull/18741)
* [rust-analyzer: do not ask the client to resolve for non existing label details](https://github.com/rust-lang/rust-analyzer/pull/18714)
* [rust-analyzer: don't trigger paren wrapping typing handler after idents](https://github.com/rust-lang/rust-analyzer/pull/18739)
* [rust-analyzer: fix a case where completion was unable to expand a macro](https://github.com/rust-lang/rust-analyzer/pull/18723)
* [rust-analyzer: fix empty check diagnostics not marking files as changed](https://github.com/rust-lang/rust-analyzer/pull/18740)
* [rust-analyzer: fix flycheck workspace when requested but package was found](https://github.com/rust-lang/rust-analyzer/pull/18742)
* [rust-analyzer: fix pretty-printing of `@` patterns](https://github.com/rust-lang/rust-analyzer/pull/18708)
* [rust-analyzer: properly check if workspace flychecking is allowed](https://github.com/rust-lang/rust-analyzer/pull/18738)
* [rust-analyzer: reduce applicability of `unnecessary_async` assist](https://github.com/rust-lang/rust-analyzer/pull/18726)
* [rust-analyzer: remove `always!` check for `file_id` in `runnables`](https://github.com/rust-lang/rust-analyzer/pull/18727)
* [rust-analyzer: remove salsa from proc-macro server dep tree](https://github.com/rust-lang/rust-analyzer/pull/18710)
* [rust-analyzer: taking a raw ref of a deref is always safe](https://github.com/rust-lang/rust-analyzer/pull/18711)
### Rust Compiler Performance Triage
We missed triage last week due to some process issues, so this triage includes two weeks of data. The overall result is positive, due to parser optimizations ([#133793](https://github.com/rust-lang/rust/pull/133793)), trait solving optimizations ([#134501](https://github.com/rust-lang/rust/pull/134501), [#132325](https://github.com/rust-lang/rust/pull/132325)) and bumping the cc crate ([#134505](https://github.com/rust-lang/rust/pull/134505)), which [improved the performance](https://github.com/rust-lang/cc-rs/pull/1279) of C/C++ dependencies of the compiler.
Triage done by **@kobzol**.
Revision range: [1b3fb316..0eca4dd3](https://perf.rust-lang.org/?start=1b3fb316751227d30b1523ed0e3f00d83956d4d0&end=0eca4dd3205a01dba4bd7b7c140ec370aff03440&absolute=false&stat=instructions%3Au)
**Summary**:
| (instructions:u) | mean | range | count |
|:----------------------------------:|:-----:|:--------------:|:-----:|
| Regressions ❌ <br /> (primary) | 0.5% | [0.3%, 0.8%] | 3 |
| Regressions ❌ <br /> (secondary) | 1.0% | [1.0%, 1.0%] | 1 |
| Improvements ✅ <br /> (primary) | -1.8% | [-7.5%, -0.3%] | 254 |
| Improvements ✅ <br /> (secondary) | -1.3% | [-5.4%, -0.3%] | 224 |
| All ❌✅ (primary) | -1.8% | [-7.5%, 0.8%] | 257 |
4 Regressions, 10 Improvements, 12 Mixed; 9 of them in rollups
90 artifact comparisons made in total
[Full report here](https://github.com/rust-lang/rustc-perf/blob/457d83dc231ed684e9f09e96fdf41f45bed0fe67/triage/2024-12-23.md)
### [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:
* [Add support for `use Trait::func`](https://github.com/rust-lang/rfcs/pull/3591)
* [crates.io: Trusted Publishing Support](https://github.com/rust-lang/rfcs/pull/3691)
### 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)
* *No RFCs entered Final Comment Period this week.*
#### Tracking Issues & PRs
##### [Rust](https://github.com/rust-lang/rust/issues?q=is%3Aopen+label%3Afinal-comment-period+sort%3Aupdated-desc)
* [disposition: merge] [Specify the behavior of `file!`](https://github.com/rust-lang/rust/pull/134442)
* [disposition: merge] [Stabilize `feature(trait_upcasting)`](https://github.com/rust-lang/rust/pull/134367)
* [disposition: merge] [Stabilize `derive(CoercePointee)`](https://github.com/rust-lang/rust/pull/133820)
* [disposition: merge] [Stabilize `asm_goto feature gate`](https://github.com/rust-lang/rust/pull/133870)
* [disposition: merge] [Tracking Issue for get_many_mut](https://github.com/rust-lang/rust/issues/104642)
* [disposition: merge] [`--nocapture` doesn't follow common CLI conventions, making it a stumbling block to people debugging failures](https://github.com/rust-lang/rust/issues/133073)
* [disposition: merge] [Tracking Issue for `sub_ptr` (feature `ptr_sub_ptr`)](https://github.com/rust-lang/rust/issues/95892)
* [disposition: merge] [From iterator for more tuples](https://github.com/rust-lang/rust/pull/132431)
* [disposition: merge] [Tracking Issue for const_swap](https://github.com/rust-lang/rust/issues/83163)
* [disposition: merge] [Tracking issue for const `alloc::Layout`](https://github.com/rust-lang/rust/issues/67521)
##### [Cargo](https://github.com/rust-lang/cargo/issues?q=is%3Aopen+label%3Afinal-comment-period+sort%3Aupdated-desc)
* *No Cargo Tracking Issues or PRs entered Final Comment Period this week.*
##### [Language Team](https://github.com/rust-lang/lang-team/issues?q=is%3Aopen+label%3Afinal-comment-period+sort%3Aupdated-desc+)
* *No Language Team Proposals entered Final Comment Period this week.*
##### [Language Reference](https://github.com/rust-lang/reference/issues?q=is%3Aopen+label%3Afinal-comment-period+sort%3Aupdated-desc)
* *No Language Reference RFCs entered Final Comment Period this week.*
##### [Unsafe Code Guidelines](https://github.com/rust-lang/unsafe-code-guidelines/issues?q=is%3Aopen+label%3Afinal-comment-period+sort%3Aupdated-desc)
* *No Unsafe Code Guideline Tracking Issues or PRs entered Final Comment Period this week.*
#### [New and Updated RFCs](https://github.com/rust-lang/rfcs/pulls)
* [new] [RFC: Set CARGO_CHECK environment variable when type checking](https://github.com/rust-lang/rfcs/pull/3748)
* [new] [unsized params in traits](https://github.com/rust-lang/rfcs/pull/3745)
* [new] [Convert "reassignment of immutable local" and "mutable borrow of immutable local" from a hard error to a deny-by-default lint](https://github.com/rust-lang/rfcs/pull/3742)
## Upcoming Events
Rusty Events between 2024-12-25 - 2025-01-22 🦀
### Virtual
* 2024-12-26 | Virtual (Charlottesville, VA, US) | [Charlottesville Rust Meetup](https://www.meetup.com/charlottesville-rust-meetup/events/)
* [**Crafting Interpreters in Rust Collaboratively**](https://www.meetup.com/charlottesville-rust-meetup/events/298898145)
* 2025-01-02| Virtual (Berlin, DE) | [OpenTechSchool Berlin](https://berline.rs/) + [Rust Berlin](https://www.meetup.com/rust-berlin/)
* [**Rust Hack and Learn**](https://berline.rs/) | [**Mirror: Rust Hack n Learn Meetup**](https://www.meetup.com/rust-berlin/events/298633277/)
* 2025-01-04 | Virtual (Kampala, UG) | [Rust Circle Kampala](https://www.eventbrite.com/o/rust-circle-kampala-65249289033/)
* [**Rust Circle Meetup**](https://www.eventbrite.com/e/rust-circle-meetup-tickets-628763176587)
* 2025-01-06 | Virtual (Tel Aviv-Yafo, IL) | [Code Mavens 🦀 - 🐍 - 🐪](https://www.meetup.com/code-mavens/events/)
* [**logger.info(f"Don't Give your {secrets} away") by Tamar Galer (Virtual, English)**](https://www.meetup.com/code-mavens/events/305045436)
* 2025-01-07 | Virtual (Tel Aviv-Yafo, IL) | [Code Mavens 🦀 - 🐍 - 🐪](https://www.meetup.com/code-mavens/events/)
* [**Microdosing Rust to your organization with Aviram Hassan (Virtual, English)**](https://www.meetup.com/code-mavens/events/304883841)
* 2025-01-08 | Virtual (Tel Aviv-Yafo, IL) | [Code Mavens 🦀 - 🐍 - 🐪](https://www.meetup.com/code-mavens/events/)
* [**BlockMesh Network implemented in Rust with Ohad Dahan (Virtual, English)**](https://www.meetup.com/code-mavens/events/304951805)
* 2025-01-09 | Virtual (Charlottesville, VA, US) | [Charlottesville Rust Meetup](https://www.meetup.com/charlottesville-rust-meetup/events/)
* [**Crafting Interpreters in Rust Collaboratively**](https://www.meetup.com/charlottesville-rust-meetup/events/298898167)
* 2025-01-09 | Miami, FL, US | [Rust Miami](https://www.meetup.com/rust-miami/)
* [**Rust / Wasm on Serverless and Frontend**](https://www.meetup.com/rust-miami/events/305122950)
* 2025-01-09 | Virtual (Nürnberg, DE) | [Rust Nuremberg](https://www.meetup.com/rust-noris/events/)
* [**Rust Nürnberg online**](https://www.meetup.com/rust-noris/events/300820279/)
* 2025-01-14 | Virtual (Dallas, TX, US) | [Dallas Rust User Meetup](https://www.meetup.com/dallasrust/events/)
* [**Second Tuesday**](https://www.meetup.com/dallasrust/events/302815031)
* 2025-01-14 | Virtual (Tel Aviv-Yafo, IL) | [Code Mavens 🦀 - 🐍 - 🐪](https://www.meetup.com/code-mavens/events/)
* [**An introduction to WASM in Rust with Márk Tolmács (Virtual, English)**](https://www.meetup.com/code-mavens/events/305064546)
* 2025-01-15 | Virtual (Vancouver, BC, CA) | [Vancouver Rust](https://www.meetup.com/vancouver-rust/events/)
* [**Leptos**](https://www.meetup.com/vancouver-rust/events/304051782)
* 2025-01-16 | Virtual (Berlin, DE) | [OpenTechSchool Berlin](https://berline.rs/) + [Rust Berlin](https://www.meetup.com/rust-berlin/)
* [**Rust Hack and Learn**](https://berline.rs/2024/12/19/rust-hack-and-learn.html) | [**Mirror: Rust Hack n Learn Meetup**](https://www.meetup.com/rust-berlin/events/298633278/)
* 2025-01-21 | Virtual (Tel Aviv-Yafo, IL) | [Rust 🦀 TLV](https://www.meetup.com/rust-tlv/events/)
* [**Exploring Rust Enums with Yoni Peleg (Virtual, Hebrew)**](https://www.meetup.com/rust-tlv/events/305110744)
* 2025-01-21 | Virtual (Washington, DC, US) | [Rust DC](https://www.meetup.com/rustdc/events/)
* [**Mid-month Rustful**](https://www.meetup.com/rustdc/events/rdhhptyhccbcc)
* 2025-01-22 | Virtual (Rotterdam, NL) | [Bevy Game Development](https://www.meetup.com/bevy-game-development/events/)
* [**Bevy Meetup #8**](https://www.meetup.com/bevy-game-development/events/305111151)
### Asia
* 2025-01-12 | Virtual (Tel Aviv-Yafo, IL) | [Rust 🦀 TLV](https://www.meetup.com/rust-tlv/events/)
* [**In person Rust January 2025 at Abra in Raanana**](https://www.meetup.com/rust-tlv/events/304898730/)
### Europe
* 2025-01-08 | Reading, UK | [Reading Rust Workshop](https://www.meetup.com/reading-rust-workshop/events/)
* [**Reading Rust Meetup**](https://www.meetup.com/reading-rust-workshop/events/305038426)
* 2025-01-09 | 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/303154281)
* 2025-01-16 | Karlsruhe, DE | [Rust Hack & Learn Karlsruhe](https://www.meetup.com/rust-hack-learn-karlsruhe/events/)
* [**Karlsruhe Rust Hack and Learn Meetup bei BlueYonder**](https://www.meetup.com/rust-hack-learn-karlsruhe/events/305144321)
* 2025-01-21 | Ghent, BE | [Systems Programming Ghent](https://sysghent.be)
* [**Tech Talks & Dinner: Insights on Systems Programming Side Projects (in Rust) - Leptos (full-stack Rust with webassembly), Karyon (distributed p2p software in Rust), FunDSP (audio synthesis in Rust)**](https://www.meetup.com/systems-programming-ghent/events/305201540/?slug=systems-programming-ghent&eventId=305201540)
* 2025-01-21 | Leipzig, SN, DE | [Rust - Modern Systems Programming in Leipzig](https://www.meetup.com/rust-modern-systems-programming-in-leipzig/events/)
* [**Self-Organized Peer-to-Peer Networks using Rust**](https://www.meetup.com/rust-modern-systems-programming-in-leipzig/events/303604074)
### North America
* 2024-12-26 | Mountain View, CA, US | [Hacker Dojo](https://www.meetup.com/hackerdojo/events/)
* [**RUST MEETUP at HACKER DOJO**](https://www.meetup.com/hackerdojo/events/wqkgntygcqbjc/)
* 2025-01-10 | Boston, MA, US | [Boston Rust Meetup](https://www.meetup.com/boston-rust-meetup-25317522anphwzdw/events/)
* [**Lechmere Rust Lunch, Jan 10**](https://www.meetup.com/bostonrust/events/304951467)
* 2025-01-16 | Nashville, TN, US | [Music City Rust Developers](https://www.meetup.com/music-city-rust-developers/events/)
* [**Rust Game Development Series 1: Community Introductions**](https://www.meetup.com/music-city-rust-developers/events/304333017)
* 2025-01-18 | Boston, MA, US | [Boston Rust Meetup](https://www.meetup.com/boston-rust-meetup-25317522anphwzdw/events/)
* [**Back Bay Rust Lunch, Jan 18**](https://www.meetup.com/bostonrust/events/304951470)
* 2025-01-21 | 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/302638258)
* 2025-01-22 | Austin, TX, US | [Rust ATX](https://www.meetup.com/rust-atx/events/)
* [**Rust Lunch - Fareground**](https://www.meetup.com/rust-atx/events/xvkdgtyhccbdc)
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:community-team@rust-lang.org
## 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](https://www.reddit.com/r/rust/comments/1h2zwpx/official_rrust_whos_hiring_thread_for_jobseekers/)
# Quote of the Week
> It's only a transmute if it's from the transmute region of std; otherwise it's just sparkling unsafety.
– [Josh Triplett on github](https://github.com/rust-lang/rust/pull/128351#issuecomment-2552304484)
Thanks to [Josh](https://users.rust-lang.org/t/twir-quote-of-the-week/328/1645) for the self-suggestion!
[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), [andrewpollack](https://github.com/andrewpollack), [U007D](https://github.com/U007D), [kolharsam](https://github.com/kolharsam), [joelmarcey](https://github.com/joelmarcey), [mariannegoldin](https://github.com/mariannegoldin), [bennyvasquez](https://github.com/bennyvasquez).*
*Email list hosting is sponsored by [The Rust Foundation](https://foundation.rust-lang.org/)*
<small>[Discuss on r/rust](https://www.reddit.com/r/rust/comments/1hn7y8z/this_week_in_rust_579/)</small>
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