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.

Want TWIR in your inbox? Subscribe here.

Updates from Rust Community

Newsletters

• Scientific Computing in Rust #18 (May 2026)

Project/Tooling Updates

• gitoxide - May 26
• hyper User Survey 2025 Results
• Rust Update: gRPC Welcomes Tonic!
• serde-const-default v0.1: Removes boilerplate when using const values as field defaults
• BoquilaHUB 0.5: AIs for Nature. Now it includes SOTA AI bioacoustics models and embeddings models
• splog: a log viewer TUI with automatic tag categorization
• rgx v0.12.3 — Building a regex debugger for the terminal in Rust
• UI tests are the guardrails an AI needs: the story of clipboardwire
• slintcn 0.22: shadcn/ui-style copy-paste components for Slint native apps
• Releasing dtact v0.2.2 and rssn-advanced v0.1.0: the next generation async concurrent engine and scientific computing engine

Observations/Thoughts

• Noroboto: Lying Fonts and Mitigation in Rust
• Erasing Existentials
• libwce: the entropy layer of a wavelet codec, on its own
• Tech Notes: Theseus: translating win32 to wasm
• Bevy Game Engine Explained Visually
• The reflex of deriving serde traits
• Physical AI Needs a Typed World Model, Not a Vector DB
• Keep calm and use (Rust) monorepos
• [audio] Rust for Linux Live with Alice Ryhl and Greg Kroah-Hartman
• [audio] Netstack.FM episode 38 — Building and testing network stacks with Rama
• [video] Can a QR code be made of stars?

Rust Walkthroughs

• Rust Patterns & Engineering How-Tos
• Laissez-Faire Errors
• Learn Rust HashMap and Iterators by Building a Git Object Store Reader
• Learn the Basics of Bevy by Building and Deploying Pong to Itch.io
• The Slowdown That Doesn't Show Up in Profiles
• Building an AsyncIO executor for the 3DS
• [video] Nine Ways to do Inheritance in Rust, a Language without Inheritance

Miscellaneous

• Content-addressed Rust builds (or, what kache actually caches)

Crate of the Week

This week's crate is inline_tweak, a crate to embed tweakable constants inside your Rust application without full recompilation.

Thanks to Kill The Mule 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.

• rust cookbook - Expand Command Line section with clap derive, subcommands, and env vars

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.

• No Calls for papers or presentations were submitted this week.

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

Updates from the Rust Project

352 pull requests were merged in the last week

Compiler

• rustc_on_unimplemented: introduce format specifiers
• account for proc macro spans in do_not_recommend diagnostics
• implement fast path for derive(PartialOrd) when deriving Ord
• make bitset would_modify_words more vectorzer-friendly
• parse mut restrictions
• stop needing materialized places for most intrinsics

Library

• add unstable Share trait
• stabilize bool_to_result
• use strongly typed wrapped indices in VecDeque

Cargo

• compiler: forward verbose flag to rustc for local crates
• don't use the network for a publish dry-run test
• break out RegistryConfig and crate_url for interpreting RegistryConfig::dl
• fix CVE-2026-5222 and CVE-2026-5223
• artifact: remove compat mode from artifacts

Rustdoc

• stabilize --remap-path-prefix in rustdoc

Clippy

• useless_format: fire on wrapped in a block-producing macro
• return can be removed from the last stmt of a block if it has an expr
• add check for midpoint using multiplication by 0.5 and >> 1
• avoid unnecessary String allocations in MinifyingSugg arithmetic ops
• extend clippy::missing_safety_doc to unsafe fields
• fix manual_range_contains NAN handling
• fix error message for useless_borrows_in_formatting for mutable borrows
• move unnecessary_get_then_check to complexity
• simplify is_some() && …unwrap() to is_some_and in unit_arg

Rust-Analyzer

• diagnostics: mut_ref binding feature diagnostic
• assists/add_reference_here: _modify_ the reference type when dealing with &T->&mut T
• cfg: correct separator index in CfgDiff disable loop
• hir-ty: saturate float-to-uint cast in const eval
• test-utils: drain inactive_regions by inactive_line_region
• add diagnostic for E0033
• add diagnostic for E0608
• completions imports exclude supports sub items
• filter package-scoped features
• extract_module missing import for macro calls
• add type_match score for struct_pat
• allow wildcard params in foreign fn declarations
• analysis expected ty in enum variant
• autoimport enum variants
• do not autoref in method probe in path mode
• do not complete semicolon in match-expr place
• do not consider the path of the macro in a macro call to be inside a macro call
• emit diagnostic for rest array patterns without fixed-length arrays
• fix SyntaxContext::roots technically overlapping valid interneds
• flip coerce_never type_mismatch tys
• have a specific error for unimplemented builtin macros
• no suggest ref match when expected generic ref
• no use sad pattern on happy arm with guard
• normalize expected tuple struct pat field
• refactor handling of generic params in hir::Type
• support named consts in range pattern types
• use grouped annotation for add_label_to_loop
• provide better incrementality for modules

Rust Compiler Performance Triage

This week was largely positive, with most of the improvements coming from algorithm change in visibility checking: #156228.

Triage done by @panstromek. Revision range: 281c97c3..783eb8c8

Summary:

2 Regressions, 2 Improvements, 5 Mixed; 2 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:

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

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

Compiler Team (MCPs only)

• Promotes 5 Thumb-mode bare-metal Arm targets to Tier 2
• Add -Z dead-fn-elimination to skip codegen of BFS-unreachable functions

Rust

• Update transmute_copy to ub_checks and ?Sized
• Tracking Issue for NEON dot product intrinsics
• Never break between empty parens

Rust RFCs

• Avoid linting unreachable_code on todo!()

Unsafe Code Guidelines

• What are the values of a union type? (in particular, what is the validity invariant of a union)

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

New and Updated RFCs

• No New or Updated RFCs were created this week.

Upcoming Events

Rusty Events between 2026-05-27 - 2026-06-24 🦀

Virtual

• 2026-05-27 | Virtual (Girona, ES) | Rust Girona
  • Weekly coding session
• 2026-06-02 | Virtual | libp2p Events
  • rust-libp2p Open Maintainers Call
• 2026-06-02 | Virtual (Tel Aviv-yafo, IL) | Rust 🦀 TLV
  • ‎שיחה חופשית ווירטואלית על ראסט
• 2026-06-03 | Virtual (Indianapolis, IN, US) | Indy Rust
  • Indy.rs - with Social Distancing
• 2026-06-04 | Virtual (Berlin, DE) | Rust Berlin
  • Rust Hack and Learn
• 2026-06-04 | Virtual (Nürnberg, DE) | Rust Nuremberg
  • Rust Nürnberg online
• 2026-06-04 | Virtual (Tel Aviv-yafo, IL) | Code Mavens 🦀 - 🐍 - 🐪
  • Exploring FalkorDB - Learning to use a Graph Database in Rust
• 2026-06-06 | Virtual (Kampala, UG) | Rust Circle Meetup
  • Rust Circle Meetup
• 2026-06-07 | Virtual (Dallas, TX, US) | Dallas Rust User Meetup
  • Rust Deep Learning: First Sunday
• 2026-06-09 | Virtual (Dallas, TX, US) | Dallas Rust User Meetup
  • Second Tuesday
• 2026-06-10 | Virtual (Girona, ES) | Rust Girona
  • Weekly coding session
• 2026-06-16 | Virtual (Washington, DC, US) | Rust DC
  • Mid-month Rustful
• 2026-06-17 | Hybrid (Vancouver, BC, CA) | Vancouver Rust
  • Jiff
• 2026-06-17 | Virtual (Girona, ES) | Rust Girona
  • Weekly coding session
• 2026-06-18 | Hybrid (Seattle, WA, US) | Seattle Rust User Group
  • June, 2026 SRUG (Seattle Rust User Group) Meetup
• 2026-06-18 | Virtual (Berlin, DE) | Rust Berlin
  • Rust Hack and Learn
• 2026-06-21 | Virtual (Dallas, TX, US) | Dallas Rust User Meetup
  • Rust Deep Learning: Third Sunday
• 2026-06-23 | Virtual (Dallas, TX, US) | Dallas Rust User Meetup
  • Fourth Tuesday
• 2026-06-23 | Virtual (London, UK) | Women in Rust
  • Lunch & Learn: What the heck are monads - and how do we fake them in Rust

Asia

• 2026-06-02 | Beijing, CN | Voice AI and Rust Meetup (Rust for AI, lowcoderust.com)
  • AI Agents and Open Source LLM (Call for Speakers)

Europe

• 2026-05-28 | Copenhagen, DK | Copenhagen Rust Community
  • Rust meetup #68
• 2026-05-28 | London, UK | Rust London User Group
  • LDN Talks May Community Showcase
• 2026-05-29 | Berlin, DE | Rust Berlin
  • Rust Berlin Talks: The next generation
• 2026-05-30 | Stockholm, SE | Stockholm Rust
  • Ferris' Fika Forum #26
• 2026-06-02 | Frankfurt, DE | Rust Rhein-Main
  • gRPC with Rust and Tonic
• 2026-06-03 | Dublin, IE | Rust Dublin
  • Join us live and INPERSON for Rust 261
• 2026-06-03 | Girona, ES | Rust Girona
  • Rust Girona Hack & Learn 06 2026
• 2026-06-10 | München, DE | Rust Munich
  • Rust Munich 2026 / 2 - Hacking Evening
• 2026-06-11 | Switzerland, CH | PostTenebrasLab
  • Rust Meetup Geneva
• 2026-06-12 - 2026-06-14 | Kraków, PL | Rustmeet
  • Rustmeet
• 2026-06-16 | Leipzig, DE | Rust - Modern Systems Programming in Leipzig
  • Interactive: Everything is Open Source
• 2026-06-16 | Milano, IT | Rust Language Milan
  • Real-time planning in Rust: SolverForge & SERIO
• 2026-06-18 | Aarhus, DK | Rust Aarhus
  • Talk Night at Danske Commodities

North America

• 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
• 2026-05-28 | Mountain View, CA, US | Hacker Dojo
  • RUST MEETUP at HACKER DOJO
• 2026-05-30 | Boston, MA, US | Boston Rust Meetup
  • Central Cambridge Rust Lunch, May 30
• 2026-06-04 | Saint Louis, MO, US | STL Rust
  • Testing, Coverage, Tracey & Mutations
• 2026-06-06 | Boston, MA, US | Boston Rust Meetup
  • Boston Common Rust Lunch, June 6
• 2026-06-11 | Lehi, UT, US | Utah Rust
  • Utah Rust June Meetup
• 2026-06-11 | Mountain View, CA, US | Hacker Dojo
  • RUST MEETUP at HACKER DOJO
• 2026-06-11 | San Diego, CA, US | San Diego Rust
  • San Diego Rust June Meetup - Back in person!
• 2026-06-16 | San Francisco, CA, US | San Francisco Rust Study Group
  • Rust Hacking in Person
• 2026-06-17 | Hybrid (Vancouver, BC, CA) | Vancouver Rust
  • Jiff
• 2026-06-18 | Hybrid (Seattle, WA, US) | Seattle Rust User Group
  • June, 2026 SRUG (Seattle Rust User Group) Meetup
• 2026-06-24 | Austin, TX, US | Rust ATX
  • Rust Lunch - Fareground
• 2026-06-24 | Los Angeles, CA, US | Rust Los Angeles
  • Rust LA: Rust-Based Constraint Solvers in 2D Sketching with Zoo Technologies

South America

• 2026-06-18 | Florianópolis, BR | Rust SC
  • Rust Floripa

If you are running a Rust event please add it to the calendar to get it mentioned here. Please remember to add a link to the event too. Email the Rust Community Team for access.

Jobs

Please see the latest Who's Hiring thread on r/rust

Quote of the Week

This overflows the trait solver today as well as my brain

– Nadrieril on their blog

Thanks to Theemathas 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

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.

Want TWIR in your inbox? Subscribe here.

Updates from Rust Community

Official

• Project goals update — April 2026 (end of 2025H2)
• Program management update — April 2026

Newsletters

• This Month in Rust OSDev: April 2026

Project/Tooling Updates

• Tonic is joining the gRPC project
• Toasty 0.6.0 - What is new?
• ex_ratatui: Elixir bindings for ratatui via Rustler NIFs
• OmniScope: A Cross-Language LLVM IR Static Analyzer Targeting Unsafe/FFI Boundaries:
• citum: a new Rust citation processor and associated tools.
• cargo-crap: Finding Untested Complexity in AI-Generated Rust Code
• What the Graph Owes: Connectors That Drive Outputs
• swpui: a TUI for case-aware search and replace
• kache 0.3.0: zero-copy efficient worktree compilation
• ghr: a Rust TUI for managing GitHub pull requests, issues, notifications, and reviews

Observations/Thoughts

• Scaling Rust codebases: Lessons learned organizing large projects and managing errors
• Migrating from Go to Rust
• Why I built wrkflw
• [video] Rust's God Mode
• [video] How Rust engineered the perfect async runtime

Rust Walkthroughs

• 5× faster fast_blur in image-rs
• Finding the Time Part 2 - Rust Async and the Arm Generic Timer
• Parsing Godot .tres files and walking the resource graph
• Rust x GBA: Setup and Pixels
• Learn Rust Lifetimes by Building a Generic LRU Cache
• How to benchmark Rust code with Gungraun
• Book: An Introduction to Programming, using ECS & EBP in Rust

Crate of the Week

This week's crate is cargo-crap, a cargo subcommand to calculate the Change Risk Anti-Patterns metric for a crate.

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

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.

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

369 pull requests were merged in the last week

Compiler

• add Swift function call ABI
• implement pinned drop sugar

Library

• map_try_insert changes
• implement OsStr::split_at
• implement into_array for Vec<T>
• move std::io::Cursor to core::io
• move std::io::util to core::io
• widen the result of widening_mul

Cargo

• clean: respect build.target config for clean -p
• diag: Consolidate verify/run diagnostics passes
• diag: Report deferred diagnostics like other diagnostics
• diag: Pull in the parse pass
• lints: Avoid compiling where possible
• drop -Zunstable-options for rustdoc --emit

Rustdoc

• stabilize --emit flag
• correctly handle associated items in rustdoc macro expansion
• correctness & perf improvements to link-to-definition
• properly support macros with multiple kinds

Clippy

• fix duration_suboptimal_units for small literals
• fix arithmetic side effects false positive

Rust-Analyzer

• add diagnostic for E0029
• add diagnostic for E0614
• add diagnostic for E0638
• add handler for E0040
• encode the name instead of index in EnumVariantId
• fix assist qualify_path loses path segment
• add param on result methods for replace_method_eager_lazy
• complete ref_match in macro
• fully support pattern types
• handle usages in macro for extract_function
• no complete module colons before exists colons
• no lint unsized adt self_ty missing bounded assoc
• not complete same name inherent deref methods
• only ref match non-unknown value items
• show Run lens for fn main in bench targets
• handle TyKind::{Pat,UnsafeBinder} in has_drop_glue
• implement pattern_type macro
• method-resolution: emit error for method calls with illegal Sized bound
• migrate inline_call assist to SyntaxFactory
• perf: provide access to RootDatabase's LineIndex for the proc macro protocol
• show const in the signature help if applicable
• show unsafe in the signature help if applicable

Rust Compiler Performance Triage

Fewer than usual PRs merged, mostly due to a shorter week than normal and some CI trouble. Overall a slightly positive week for performance.

Triage done by @simulacrum. Revision range: 29b75901..281c97c3

0 Regressions, 0 Improvements, 4 Mixed; 1 of them in rollups 17 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:

• Cargo RFC for min publish age

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

Compiler Team (MCPs only)

• Removing the unstable ptx linker flavor
• Create a new Tier 3 target: powerpc64le-unknown-none
• Optimize repr(Rust) enums by omitting tags in more cases involving uninhabited variants.
• Proposal for a dedicated test suite for the parallel frontend
• Promote tier 3 riscv32 ESP-IDF targets to tier 2
• Proposal for Adapt Stack Protector for Rust

No Items entered Final Comment Period this week for Rust, Rust RFCs, Cargo, Language Team, 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

• Documentation interpolation

Upcoming Events

Rusty Events between 2026-05-20 - 2026-06-17 🦀

Virtual

• 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 (Cardiff, GB) | Rust and C++ Cardiff
  • Hybrid event with Rust Dortmund!
• 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
• 2026-06-02 | Virtual | libp2p Events
  • rust-libp2p Open Maintainers Call
• 2026-06-03 | Virtual (Indianapolis, IN, US) | Indy Rust
  • Indy.rs - with Social Distancing
• 2026-06-04 | Virtual (Berlin, DE) | Rust Berlin
  • Rust Hack and Learn
• 2026-06-04 | Virtual (Nürnberg, DE) | Rust Nuremberg
  • Rust Nürnberg online
• 2026-06-07 | Virtual (Dallas, TX, US) | Dallas Rust User Meetup
  • Rust Deep Learning: First Sunday
• 2026-06-09 | Virtual (Dallas, TX, US) | Dallas Rust User Meetup
  • Second Tuesday
• 2026-06-10 | Virtual (Girona, ES) | Rust Girona
  • Weekly coding session
• 2026-06-16 | Virtual (Washington, DC, US) | Rust DC
  • Mid-month Rustful
• 2026-06-02 | Virtual | libp2p Events
  • rust-libp2p Open Maintainers Call
• 2026-06-17 | Virtual (Girona, ES) | Rust Girona
  • Weekly coding session
• 2026-06-17 | Virtual (Vancouver, BC, CA) | Vancouver Rust
  • Rust Study/Hack/Hang-out

Asia

• 2026-06-02 | Beijing, CN | Voice AI and Rust Meetup (Rust for AI, lowcoderust.com)
  • AI Agents and Open Source LLM (Call for Speakers)

Europe

• 2026-05-18 - 2026-05-23 | Utrecht, NL | RustWeek 2026
  • RustWeek 2026
• 2026-05-21 | Amsterdam, NL | RustNL
  • RustWeek Hackathon
• 2026-05-22 | Amsterdam, NL | RustNL
  • Walking Tour around Utrecht
• 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
• 2026-05-26 | Trondheim, NO | Rust Trondheim
  • Motorized blinds, and replacing Docker, in Rust!
• 2026-05-28 | London, UK | Rust London User Group
  • LDN Talks May Community Showcase
• 2026-05-29 | Berlin, DE | Rust Berlin
  • Rust Berlin Talks: The next generation
• 2026-06-03 | Dublin, IE | Rust Dublin
  • Join us live and INPERSON for Rust 261
• 2026-06-03 | Girona, ES | Rust Girona
  • Rust Girona Hack & Learn 06 2026
• 2026-06-11 | Switzerland, CH | PostTenebrasLab
  • Rust Meetup Geneva
• 2026-06-16 | Leipzig, SN, DE | Rust - Modern Systems Programming in Leipzig
  • Interactive: Everything is Open Source

North America

• 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 | New York, NY, US | Rust NYC
  • Rust NYC: "Boring File Storage" & "Indie News Feed Optimization"
• 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
• 2026-05-28 | Mountain View, CA, US | Hacker Dojo
  • RUST MEETUP at HACKER DOJO
• 2026-05-30 | Boston, MA, US | Boston Rust Meetup
  • Central Cambridge Rust Lunch, May 30
• 2026-06-04 | Saint Louis, MO, US | STL Rust
  • Testing, Coverage, Tracey & Mutations
• 2026-06-06 | Boston, MA, US | Boston Rust Meetup
  • Boston Common Rust Lunch, June 6
• 2026-06-11 | Lehi, UT, US | Utah Rust
  • Utah Rust June Meetup
• 2026-06-11 | San Diego, CA, US | San Diego Rust
  • San Diego Rust June Meetup - Back in person!
• 2026-06-16 | San Francisco, CA, US | San Francisco Rust Study Group
  • Rust Hacking in Person

Oceania

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

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

Posts like this are useful for those of us who like to help, and who work on rustc to make it more helpful, by letting us learn about what kinds of mistakes people make.

– Kevin Reid on rust-users

Thanks to firebits.io 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

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.

Want TWIR in your inbox? Subscribe here.

Updates from Rust Community

Foundation

• Rust Foundation and Package Registry Leaders Unite to Address Open Source Sustainability Crisis

Newsletters

• The Embedded Rustacean Issue #71

Project/Tooling Updates

• Numax - A portable Rust runtime for distributed apps
• Entroly 0.18.0: Rust-powered AI context engine with PRISM reinforcement learning, SimHash dedup, and EGSC caching
• uFerris: A Versatile Learning Board for Rust Embedded
• Record Ownership: Which Side Is Right?
• iroh 1.0.0-rc.0 - The first release candidate
• Burn 0.21.0 Release: Up to 8× Lower Framework Overhead, Differentiable Collectives and Improved Kernels
• Ratty: A terminal emulator with inline 3D graphics
• Announcing the Rust runtime for Appwrite Functions
• Announcing diesel-async 0.9
• Fresh 0.3.4: Ansi-native 'terminal' theme matches the system's theme; UI for Live Grep + custom grep providers; persistent 'dock' split; Verilog/VHDL support; and much more

Observations/Thoughts

• Killing a Cow made my JSON formatter 42% faster
• Getting Started with Geospatial Rust — What satellites measure, spectral bands, indices, cloud detection.
• Lessons Learned Building High-Performance Rust Profiler
• The limits of Rust, or why you should probably not follow Amazon, Cloudflare and Discord
• The hidden cost of mpsc channels
• "Respectful" YAML patching in Rust

Rust Walkthroughs

• Learn Rust Generics and Traits By Building a Mini Blackjack Game
• Build a Full-Featured Text Editor From Scratch | 0xKiire
• Where the sun keeps shinin': the provider pattern
• End-to-End Geospatial Processing with EORST — Build a satellite pipeline in Rust: STAC query to GeoTIFF.
• All the ways to mock your Rust code
• Rust in Android Development: Complete Guide

Miscellaneous

• Announcing the 2026 Rust-Edu Refresh and CFP

Crate of the Week

This week's crate is cloakrs, a library and CLI tool for detecting and masking personally identifiable information.

Despite having no suggestion to work with, llogiq is content with his choice.

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

502 pull requests were merged in the last week

Compiler

• consider Result<T, Uninhabited> and ControlFlow<Uninhabited, T> to be equivalent to T for must use lint
• fewer global node_id_to_def_id lookups
• introduce move expressions (move($expr))
• resolve: evaluate private visibilities eagerly in eff vis computation

Library

• add Command::get_resolved_envs
• add Drop::pin_drop for pinned drops
• add keepalive, set_keepalive to TcpStream implementations
• drop unmapped ZSTs in array map
• have arrays' drop_glue just unsize and call the slice version
• implemented PathBuf::into_string

Cargo

• diag: Track Cargo diagnostic warning/error count like is done for rustc
• suggest 'fmt' when user types 'cargo rustfmt'
• rebuild when -Zpublic-dependency changes

Clippy

• add new lint inline_trait_bounds
• new lint: manual_clear
• fix manual_option_zip false positive when the outer param is used in closure
• incompatibility of non_canonical_clone_impl and implicit_return

Rust-Analyzer

• add wrap in tree list with editor
• add diagnostic for E0436
• add diagnostic for E0529
• complete :: on module def
• support deref patterns
• add whitespaces on postfix completion in macro
• do not infer signatures, instead infer anon consts in them
• do not replace closure capture place types with errors if they fail to normalize
• fix handling of self in lower_coroutine_body_with_moved_arguments()
• fix offer on unrelated for toggle_macro_delimiter
• generally fix derive helper resolution in semantics
• in "Implement missing members", do not add assoc types with defaults
• no add spaces on ..= on macro inside macro
• provide an InferCtxt to TyLoweringContext
• provide source map for the lowered let self = self binding in async fns
• ref match uses unified type
• renaming mut vars removed mut in patterns generated by macro
• respect lint attributes for diagnostics that don't set their main node
• remove make mut

Rust Compiler Performance Triage

This week saw a couple of PRs affecting the new trait solver, which is steadily moving forward, in particular #156139 was a massive perf. win. #156185 optimized visibility computation, resulting in up to a 8% win on the typenum crate.

Triage done by @Kobzol. Revision range: 1d72d7e8..aa31d6d8

Summary:

2 Regressions, 2 Improvements, 5 Mixed; 4 of them in rollups 31 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:

• Rust Foundation Maintainer Fund
• RFC: Inheriting of default-features in Cargo

Final Comment Period

Every week, the team announces the 'final comment period' for RFCs and key PRs which are reaching a decision. Express your opinions now.

Tracking Issues & PRs

Rust

• lint on core::ffi::c_void as a return type
• Tracking issue for release notes of #154647: change c_double to f32 on avr targets
• Stabilize --remap-path-prefix in rustdoc
• Replace printables table with unicode_data.rs tables
• Tracking issue for RFC 2137: Support defining C-compatible variadic functions in Rust (c_variadic
• Tracking Issue for Path::is_empty
• Tracking Issue for integer formatting into a fixed-size buffer
• resolve: Partially convert ambiguous_glob_imports lint into a hard error

Rust RFCs

• Propose the concept of a crates.io username for identity
• Cargo RFC for min publish age

Language Reference

• New rule layout.repr.c.struct.align-empty

Leadership Council

• Establish the funding team

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

New and Updated RFCs

• No New or Updated RFCs were created this week.

Upcoming Events

Rusty Events between 2026-05-13 - 2026-06-10 🦀

Virtual

• 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
• 2026-06-04 | Virtual (Berlin, DE) | Rust Berlin
  • Rust Hack and Learn
• 2026-06-04 | Virtual (Nürnberg, DE) | Rust Nuremberg
  • Rust Nürnberg online
• 2026-06-07 | Virtual (Dallas, TX, US) | Dallas Rust User Meetup
  • Rust Deep Learning: First Sunday
• 2026-06-09 | Virtual (Dallas, TX, US) | Dallas Rust User Meetup
  • Second Tuesday
• 2026-06-10 | Virtual (Girona, ES) | Rust Girona
  • Weekly coding session

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
• 2026-06-02 | Beijing, CN | Voice AI and Rust Meetup (Rust for AI, lowcoderust.com)
  • AI Agents and Open Source LLM (Call for Speakers)

Europe

• 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 | Utrecht, 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
• 2026-06-03 | Dublin, IE | Rust Dublin
  • Join us live and INPERSON for Rust 261

North America

• 2026-05-14 | Lehi, UT, US | Utah Rust
  • Utah Rust May Meetup
• 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
• 2026-06-04 | Saint Louis, MO, US | STL Rust
  • Testing, Coverage, Tracey & Mutations
• 2026-06-06 | Boston, MA, US | Boston Rust Meetup
  • Boston Common Rust Lunch, June 6

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

Of the last 150 merged PRs to Bun, 108 are memory-safety-adjacent — missed cleanup on an error path, use-after-free, uninitialized reads, out-of-bounds access, reentrancy. 75 of those would not compile in a language with destructors, move semantics, and a borrow checker. One in three PRs we ship is "forgot to free something on an error path."

Of the 108, ~88 are in Zig. The ~14 in C++ are mostly ref-cycles and GC-concurrency races — the residual class that survives any language. So the Zig→Rust delta is real: the Zig bugs are exactly the destructor/ownership-fixable kind, and the C++ side is already near the floor.

Without stronger compile-time guarantees, this stays a cat-and-mouse game. The proposal is to remove the largest bug class structurally rather than fix instances of it indefinitely.

– Jarred Sumner on the bun github Thanks to Brian Kung 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

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.

Want TWIR in your inbox? Subscribe here.

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

Rust

• 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

Compiler Team (MCPs only)

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

Rust RFCs

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

Language Team

• 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 | Utrecht, 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

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