This Week In Rust: This Week in Rust 650

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 Google Summer of Code 2026 selected projects

Newsletters

• Rust Trends Issue 77 - Rust Sharpens the Craft

Project/Tooling Updates

• Imgclip: A Cross-Platform CLI for Clipboard ↔ Image File Conversion
• Connectors: Where AimDB Meets the Real World
• rkik-nts 1.0.0: a high-level Rust Network Time Security (RFC 8915) client library
• unix-ancillary 0.2.2 — safe SCM_RIGHTS fd-passing for Rust
• kache 0.2.0: zero-copy, content-addressed Rust build cache (RUSTC_WRAPPER)
• Fileman - a cross-platform 2-panel file manager

Observations/Thoughts

• One week of view_types
• Async Rust never left the MVP state
• stable specialization in Rust
• Your Clippy Config Should Be Stricter
• Your Clippy Config Should Be Stricter-er
• The Sync bound nobody asked for
• Cross-platform Rust: Analyzing how WhatsApp, Signal and more are shipping Rust to billions of devices
• [audio] Netstack.FM episode 37 — dial9: from black box to insight in Tokio

Rust Walkthroughs

• oops, cubic macro!
• [video] RustCurious lesson 7: Arrays and Slices
• Writing Middlewares for Rust Lambda Functions
• Learn Error Handling in Rust By Building a TOML Config Parser

Miscellaneous

• Awesome SQLx Resources

Crate of the Week

This week's crate is burn, a tensor and deep learning library.

Thanks to Jonas for the suggestion!

Please submit your suggestions and votes for next week!

Calls for Testing

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

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

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

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 Bluesky or Mastodon!

CFP - Events

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

• Scientific Computing in Rust 2026| 2026-06-05 | Virtual | 2026-07-08 - 2026-07-10

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

Updates from the Rust Project

504 pull requests were merged in the last week

Compiler

• canonicalize free regions from inputs as placeholders in root univ

Library

• don't reload length in String::push

Cargo

• feat(lints): Add deny-by-default text_direction_codepoint lints
• fix(compile): Where possible, hint about misplaced deps
• fix(config): [env] relative paths definition
• fix(config): normalize included config paths
• remove curl dependency from crates-io crate

Rustdoc

• fix doc_cfg feature on reexports
• preserve parent doc cfg for macro_export macros

Clippy

• add a check for some followed by filter
• fix bad_bit_mask ICE for overloaded bit ops
• needless_return_with_question_mark trigger in async functions

Rust-Analyzer

• diagnostics: add handler for E0130
• add AssocItemList add_item editor variant
• expand glob import on cyclic import fail
• add diagnostic for E0784
• allow renaming of elided lifetimes
• diagnose trait errors 🎉
• emit a diagnostic for non_exhaustive struct when constructed
• offer on if-expr with else-if for convert_to_guarded_return
• support if-else in value on postfix completions
• add missing exprs to visiting
• add missing solver lang items
• add semicolon after expr in stmt for unwrap_branch
• catch #[rustc_reservation_impl = "reason"]
• don't fetch diagnostics until proc-macros are loaded
• don't panic on impl ?Sized for introduce_named_type_parameter
• fix unwrap_branch in match_arm
• fix stack overflow on projection display
• handle empty expr in tuple expr
• improve prettify_macro_expansion()
• improve whitespaces for trait item complete
• infer the expected type as the return type for async blocks defined by async fns
• port array and ref exprs inference from rustc
• qualify .new path and no complete generic params
• remove usage of references_error() in upvar inference
• show the user's message for #[must_use]
• use Pattern_White_Space for whitespace handling
• various fixes for lower_coroutine_body_with_moved_arguments()
• wrap top level or patterns in parens in convert_match_to_let_else
• hir-ty: emit diagnostic for unused #[must_use] values
• ide-diagnostics: emit error for duplicate field in record expression
• ide-diagnostics: emit error for mismatched array pattern length
• migrate generate function to SyntaxEditor
• perf: cache more things that are related to lang items (paren traits, children/sibling assoc types/functions) but are not lang items themselves
• perf: do not intern AdtDef
• perf: improve performance of integer-based symbols
• remove add predicate for Where syntax
• remove unused a method in edit_in_place
• replace insert use and insert use as alias with its editor variant
• use syntaxFactory in generic arg instead of vanilla make

Rust Compiler Performance Triage

This week's result is pretty much neutral. It looks negative in icount numbers, but that's spurious, wall time remained largely unchanged. Some big performance improvements landed in the new solver, which is not enabled by default, yet.

Triage done by @panstromek. Revision range: ca9a134e..1d72d7e8

Summary:

1 Regression, 2 Improvements, 9 Mixed; 5 of them in rollups 34 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

• Make trait refs & assoc ty paths properly induce trait object lifetime defaults
• validate #[link_name = "..."] & #[link(name = "...")] parameters
• Improve precision of Duration-float operations
• Tracking Issue for unsafe_cell_access
• Tracking Issue for producing a Result<(), E> from a bool
• Allow shortening lifetime in CoerceUnsized for &mut
• Ensure Send/Sync is not implemented for std::env::Vars{,Os}
• feat(rustdoc): stabilize --emit flag
• Make Infallible = !
• Add lint againts invalid runtime symbol definitions
• error on empty export_name
• Check arguments of attributes where no arguments are expected
• stabilize feature(cfg_target_has_atomic_equal_alignment)
• fix: fix the capture behavior of if let in closures
• Resolver: Batched Import Resolution
• Ensure Send/Sync impl for std::process::CommandArgs

• Turn long-deprecated -C options into errors
• Promote loongarch32-unknown-none* to Tier 2

• Propose the concept of a crates.io username for identity

• Revise decision process: champion vs FCP decisions

No Items entered Final Comment Period this week for Cargo, Language Reference, Leadership Council or Unsafe Code Guidelines. Let us know if you would like your PRs, Tracking Issues or RFCs to be tracked as a part of this list.

New and Updated RFCs

• Initial Rustdoc LaTeX math RFC
• Project-wide LLM policy

Upcoming Events

Rusty Events between 2026-05-06 - 2026-06-03 🦀

Virtual

• 2026-05-06 | Virtual (Cardiff, UK) | Rust and C++ Cardiff
  • Practical introduction to SIMD
• 2026-05-06 | Virtual (Girona, ES) | Rust Girona
  • Weekly coding session
• 2026-05-06 | Virtual (Indianapolis, IN, US) | Indy Rust
  • Indy.rs - with Social Distancing
• 2026-05-07 | Virtual (Berlin, DE) | Rust Berlin
  • Rust Hack and Learn
• 2026-05-07 | Virtual (Nürnberg, DE) | Rust Nuremberg
  • Rust Nürnberg online
• 2026-05-09 | Virtual (Girona, ES) | Rust Girona
  • Learning Rust the Hard Way: Building a TUI Chess Game
• 2026-05-12 | Virtual (Dallas, TX, US) | Dallas Rust User Meetup
  • Second Tuesday
• 2026-05-12 | Virtual (London, UK) | Women in Rust
  • 👋 Community Catch Up
• 2026-05-12 | Virtual (Tel Aviv-yafo, IL) | Code Mavens 🦀 - 🐍 - 🐪
  • Introduction to database access using Rust SQLx
• 2026-05-17 | Virtual (Dallas, TX, US) | Dallas Rust User Meetup
  • Rust Deep Learning: Third Sunday
• 2026-05-19 | Virtual (Washington, DC, US) | Rust DC
  • Mid-month Rustful
• 2026-05-20 | Hybrid (Vancouver, BC, CA) | Vancouver Rust
  • Mouse Control with Rust
• 2026-05-20 | Virtual (Girona, ES) | Rust Girona
  • Weekly coding session
• 2026-05-21 | Hybrid (Seattle, WA, US) | Seattle Rust User Group
  • May, 2026 SRUG (Seattle Rust User Group) Meetup
• 2026-05-21 | Virtual (Berlin, DE) | Rust Berlin
  • Rust Hack and Learn
• 2026-05-21 | Virtual (Charlottesville, VA, US) | Charlottesville Rust Meetup
  • Tock OS Part #4 - Capsule coding in QEMU!
• 2026-05-26 | Virtual (Dallas, TX, US) | Dallas Rust User Meetup
  • Fourth Tuesday
• 2026-05-26 | Virtual (London, UK) | Women in Rust
  • Lunch & Learn: Seeing Into Your Code - A Practical Guide to Tracing in Rust
• 2026-05-27 | Virtual (Girona, ES) | Rust Girona
  • Weekly coding session
• 2026-06-03 | Virtual (Indianapolis, IN, US) | Indy Rust
  • Indy.rs - with Social Distancing

Africa

• 2026-05-12 | Johannesburg, ZA | Johannesburg Rust Meetup
  • Rust by Example - Flow of Control

Asia

• 2026-05-13 | Malaysia, MY | Rust Meetup Malaysia
  • Rust Meetup May 2026
• 2026-05-14 | Seoul, KR | Seoul Rust (Programming Language) Meetup
  • Seoul Rust Meetup
• 2026-05-16 | Bangalore, IN | Rust Bangalore
  • May 2026 Rustacean meetup

Europe

• 2026-05-06 | Köln, DE | Rust Cologne
  • Rust in May: Rust for Starters, Part 2
• 2026-05-06 | Milano, MI, IT | Rust Language Milan
  • Rust Milan @ Python Milano: Python or Rust? Yes!
• 2026-05-06 | Oxford, UK | Oxford ACCU/Rust Meetup.
  • Building LLMs from scratch
• 2026-05-07 | Edinburgh, UK | Rust and Friends
  • Rust May Talks: Aetherus + Bevy
• 2026-05-11 | Augsburg, DE | Rust Meetup Augsburg
  • Rust Meetup #19: Tiago Manczak - Game On with Rust & Pico
• 2026-05-13 | Girona, ES | Rust Girona
  • Rust Girona Hack & Learn 05 2026
• 2026-05-14 | Switzerland, CH | PostTenebrasLab
  • Rust Meetup Geneva
• 2026-05-18 - 2026-05-23 | Amsterdam, NL | RustWeek 2026
  • RustWeek 2026
• 2026-05-18 | Milano, MI, IT | Rust Language Milan
  • RustWeek 2026
• 2026-05-19 | Aarhus, DK | Rust Aarhus
  • Hack Night
• 2026-05-19 | Amsterdam, NL | RustNL
  • RustWeek 2026 announcement
• 2026-05-19 | Leipzig, DE | Rust - Modern Systems Programming in Leipzig
  • Cross-Building & Cross-Testing
• 2026-05-19 | London, UK | Women in Rust
  • RustWeek lunch meetup
• 2026-05-21 | Amsterdam, NL | RustNL
  • RustWeek Hackathon
• 2026-05-22 | Amsterdam, NL | RustNL
  • Bike tour around Utrecht
• 2026-05-26 | Dortmund, DE | Rust Dortmund
  • Rust Dortmund Meetup - Agentic Programming - May
• 2026-05-26 | Manchester, UK | Rust Manchester
  • Rust Manchester May Code Night
• 2026-05-29 | Berlin, DE | Rust Berlin
  • Rust Berlin Talks: The next generation

North America

• 2026-05-07 | New York, NY, US | Rust NYC
  • Rust NYC: Reversing the Great Firewall and Geospatial Rust
• 2026-05-07 | Saint Louis, MO, US | STL Rust
  • Open Project Night
• 2026-05-09 | Boston, MA, US | Boston Rust Meetup
  • Back Bay Rust Lunch, May 9
• 2026-05-14 | Mountain View, CA, US | Hacker Dojo
  • RUST MEETUP at HACKER DOJO
• 2026-05-14 | Portland, OR, US | PDXRust
  • From Radio Waves to Pixels - Real-Time Visualizations with Rust and WebAssembly
• 2026-05-14 | San Diego, CA, US | San Diego Rust
  • San Diego Rust May Meetup - Back in person!
• 2026-05-16 | Boston, MA, US | Boston Rust Meetup
  • Lechmere Rust Lunch, May 16
• 2026-05-19 | San Francisco, CA, US | San Francisco Rust Study Group
  • Rust Hacking in Person
• 2026-05-20 | Hybrid (Vancouver, BC, CA) | Vancouver Rust
  • Mouse Control with Rust
• 2026-05-20 | San Francisco, CA, US | Bay Area Rust Meetup
  • Bay Area Rust Meetup
• 2026-05-21 | Hybrid (Seattle, WA, US) | Seattle Rust User Group
  • May, 2026 SRUG (Seattle Rust User Group) Meetup
• 2026-05-21 | Nashville, TN, US | Music City Rust Developers
  • Community Meetup
• 2026-05-23 | Boston, MA, US | Boston Rust Meetup
  • Allston Rust Lunch, May 23
• 2026-05-27 | Austin, TX, US | Rust ATX
  • Rust Lunch - Fareground
• 2026-05-28 | Atlanta, GA, US | Rust Atlanta
  • Rust-Atl
• 2026-05-28 | Los Angeles, CA, US | Rust Los Angeles
  • Rust LA: Rust in Embedded & Autonomous Systems at Parallel Systems in DTLA
• 2026-05-30 | Boston, MA, US | Boston Rust Meetup
  • Central Cambridge Rust Lunch, May 30

Oceania

• 2026-05-14 | Melbourne, AU | Rust Melbourne
  • Rust Melbourne - May 2026
• 2026-05-26 | Barton, ACT, AU | Canberra Rust User Group
  • May Meetup

South America

• 2026-05-13 | Montevideo, UY | Rust Meetup Uruguay
  • Rust Uruguay meetup de Mayo

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

From a business standpoint, we should have reasonable confidence that it’ll stick around and be healthy for more than 10 years. We’d also like a robust ecosystem of code and tools that we can rely on, and experts we can hire.

– David Anderson on the tailscale blog

Thanks to Ivan Fraixedes for the suggestion!

Please submit quotes and vote for next week!

This Week in Rust is edited by:

• nellshamrell
• llogiq
• ericseppanen
• extrawurst
• U007D
• mariannegoldin
• bdillo
• opeolluwa
• bnchi
• KannanPalani57
• tzilist

Email list hosting is sponsored by The Rust Foundation

Discuss on r/rust