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

• Infrastructure Team 2026 Q3 Recap and Q4 Plan

Foundation

• Rust Foundation Board Updates | October 2026

Newsletters

• The Embedded Rustacean Issue #82

Project/Tooling Updates

• Bevy 0.20
• Creusot 0.14.0
• Yagi Signal Lab

Observations/Thoughts

• All code will converge on Rust
• Why 'externalized' proofs of cyclic trait impls does not work
• Visualizing crossbeam Epoch Based Reclamation
• How Signal and WhatsApp deploy Rust to billions of Android and iOS devices
• An update on Rust's project goals
• Analyzing Rust programs with Charon
• Owning C types from Rust code
• [Video] RustConf 2025 Interview: Manish Goregaokar, Rust Devtools

Rust Walkthroughs

• [JA] 同じ質問に2回お金を払うのをやめた: LLM の前に置くだけの重複排除プロキシを Rust (Tokio) で作った
• Using TrustZone-M in Rust on the Raspberry Pi Pico 2
• Writing a hypermedia app in Rust
• Custom structs as Tree Nodes
• How to Profile Rust Performance using Grafana and Prometheus
• [Video] RustCurious lesson 11: Reborrowing and Rust's Invisible Lifetimes
• [Video] BAML’s Rust-Powered Telemetry: 1000× Faster & Lossless
• [Video] Fuzz Testing a Discrete Event Simulator

Crate of the Week

This week's crate is hotcode, a crate for hot-reloading Rust functions at runtime.

Thanks to alordash for the self-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.

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

603 pull requests were merged in the last week

Compiler

• allow unary operand types to be inferred later
• avoid cloning impl trait AST nodes in late resolution
• avoid double-checking self.bound_vars' len in ValidateBoundVars' TypeVisitor impl
• check is_indirect_first_projection when replacing in RefProp
• implement clone_from for BorrowckDomain
• MIR move elimination (3/6): PreciseLiveness
• perf: cache FFI safety results in improper_ctypes lint
• reserve more capacity for Symbol interner
• skip runtime fma detection when enabled at compile time on x86_64
• stabilize the WebAssembly wide-arithmetic feature
• stabilize optimize attribute
• treat union fields as aliasing each other in value_analysis

Library

• add fs::rename_noreplace
• directly deallocates the nodes instead of traversing every element when BTreemap dropping
• fast path for BTreeMap::Iter::next
• make NonNull::{read,write}_volatile unstably const
• stabilize ptr::try_cast_aligned
• vectorized vec::dedup pre-scan

Cargo

• avoid absolute paths in fingerprints if they are relative to the workspace root
• fix: cargo installing from a directory source fails for binary packages with no dependencies
• config: Don't process includes for credentials.toml files
• git: Add future-incompat warning in prep for removing auto-detection
• hints: support minimum optimization levels
• job: Allow explicit child process breakaway on Windows
• layout: exclude a build-dir created as a parent from backups
• mock-std: Set stable crate versions to 0.0.0
• pkgid-spec: Builtin package spec parsing and formatting
• refactor: modernize some API usages for 1.99
• restrict workspace-relative dep-info to workspace packages
• rustdoc: suppress edition unspecified warnings
• test: mark requiring ssh for tests shelling out to it

Rustdoc

• fix more incoherent_impl linking
• prefer local paths over remote ones when foreign item is locally reexported
• check reexport chain if inline before hidden

Clippy

• configuration: add too_long_first_doc_paragraph lint to the check-private-items list
• do not trigger manual_is_multiple_of on literal divisors
• ensure a deprecation warning is emitted for lint-inconsistent-struct-field-initializers
• new lints deprecated_attributes_without_{since, note}
• fix {panic, todo, unimplemented, unreachable}
• fix module_name_repetitions false negative on grouped re-exports
• fix needless_lifetimes linting where clauses lifetimes
• manual_filter: don't lint when the condition needs &mut a…
• multiple_unsafe_ops_per_block: fix false positive in with write to union field
• new lint: unnecessary_box_pin
• skip try_from_instead_of_from_str in macro expansions
• support trailing ::self for unnecessary_self_imports

Rust-Analyzer

• support inline call in macro call
• add downcast handling in enum closure capture
• assist do not add lifetime only turbofish
• check call no-paren after path colons
• complete cfg key-value in string inside cfg!()
• complete in top-level after inner-doc
• don't source-map #[doc] strings that contain escapes
• enum niche decoding should match rustc
• fix handling of generic params in anon consts
• pass rustc path to unstable-book-gen
• when the initializer in let diverges, allow non-diverging else
• mini refactors in closure capture inference
• perf: querify some things that are called by the solver and are fairly expensive to compute
• stabilize optimize attribute
• sync target feature implications from rustc_target
• typeMismatch quickfix position error: to_owned()

Rust Compiler Performance Triage

No significant improvements or regressions this week. Most of the PRs marked as improvements had a similar perf. result, which was caused by codegen noise in the measurements.

There were some nice wins for memory usage though, thanks to #163915 and especially #163887.

Triage done by @Kobzol. Revision range: cc9a14f7..7211ea59

Summary:

3 Regressions, 21 Improvements, 2 Mixed; 1 of them in rollups 27 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

• tier 3 target policy: target CPU and features must be supported by upstream backend
• Implement AsMut<T> and AsRef<T> for !.
• borrowck dataflow: respect borrow shallowness when killing borrows that conflict with assignments
• move implied bounds computation out of borrowck
• Allow : after pat_param
• 1.100-beta regression: box patterns have been removed (feature box_patterns)
• Stabilize -Zembed-metadata
• Make std::fs::{File, ReadDir, DirEntry} always needs_drop even when unsupported.

Rust RFCs

• RFC: Allow (outer) cfg-attributes on elements of tuple types and tuple (struct) patterns

Language Reference

• nail down the final validity rules: references and unions

Leadership Council

• All Hands 2027 hotel pre-booking

No Items entered Final Comment Period this week for Cargo, Compiler Team, 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

• RFC: Support registry withholding
• RFC: unsafe global_asm
• RFC for limited crates.io self-service version deletion

Upcoming Events

Rusty Events between 2026-10-14 - 2026-11-11 🦀

Virtual

• 2026-10-14 - 2026-10-17 | Hybrid (Barcelona, ES) | EuroRust
  • EuroRust 2026
• 2026-10-15 | Hybrid (Seattle, WA, US) | Seattle Rust User Group
  • October, 2026 SRUG (Seattle Rust User Group) Meetup
• 2026-10-18 | Virtual (Dallas, TX, US) | Dallas Rust User Meetup
  • Rust Deep Learning: Third Sunday
• 2026-10-20 | Virtual (Washington, DC, US) | Rust DC
  • Mid-month Rustful
• 2026-10-21 | Hybrid (Vancouver, CA) | Vancouver Rust
  • Disposable Agent Sandboxes in Rust
• 2026-10-21 | Virtual (Cardiff, UK) | Rust and C++ Cardiff
  • Operating Systems Book Club: Paging Mechanisms
• 2026-10-22 | Virtual | Rust 🦀 Maven
  • Rust and the GPU from Native to Web: An Introduction to wgpu
• 2026-10-22 | Virtual (Berlin, DE) | Rust Berlin
  • Rust Hack and Learn
• 2026-10-26 | Virtual | Rust 🦀 Maven
  • No Python was harmed: teaching a tiny MCU to learn as it goes
• 2026-10-27 | Virtual (Dallas, TX, US) | Dallas Rust User Meetup
  • Fourth Tuesday Rust Bookclub
• 2026-10-27 | Virtual (London, UK) | Women in Rust
  • Lunch & Learn: Reasoning with Async Rust
• 2026-10-29 | Virtual | Rust 🦀 Maven
  • Creating a hexadecimal editor in Rust
• 2026-11-01 | Virtual | Rust 🦀 Maven
  • Cursed Rust
• 2026-11-01 | Virtual (Dallas, TX, US) | Dallas Rust User Meetup
  • Rust Deep Learning: First Sunday
• 2026-11-03 | Virtual | Rust 🦀 Maven
  • Solving Real-World Planning Problems in Rust with SolverForge
• 2026-11-03 | Virtual (London, UK) | Women in Rust
  • 👋 Community Catch Up
• 2026-11-04 | Virtual (Indianapolis, IN, US) | Indy Rust
  • Indy.rs - with Social Distancing
• 2026-11-05 | Virtual (Berlin, DE) | Rust Berlin
  • Rust Hack and Learn
• 2026-11-10 | Virtual (Dallas, TX, US) | Dallas Rust User Meetup
  • Second Tuesday

Asia

• 2026-11-03 | Tel Aviv-Yafo, IL | Rust 🦀 TLV
  • In person Rust November 2026 at AWS in Tel Aviv

Europe

• 2026-10-14 | Barcelona, ES | BcnRust
  • 22nd bcnrust session
• 2026-10-14 - 2026-10-17 | Hybrid (Barcelona, ES) | EuroRust
  • EuroRust 2026
• 2026-10-14 | Köln, DE | Rust Cologne
  • Rust in October: Macro-magic
• 2026-10-20 | Leipzig, DE | Rust - Modern Systems Programming in Leipzig
  • Creating a realtime web Multiuser Dungeon game with Dioxus
• 2026-10-22 | Karlsruhe, DE | Rust Hack & Learn Karlsruhe
  • Karlsruhe Rust Hack and Learn Meetup bei BlueYonder
• 2026-10-22 | Toulouse, FR | Rust Toulouse
  • Rust Toulouse Meetup - Rust & Python interoperability
• 2026-10-27 | Aarhus, DK | Rust Aarhus
  • Hack Night: Rust meets AI
• 2026-10-27 | Paris, FR | Rust Paris
  • Rust meetup #89
• 2026-10-31 | Stockholm, SE | Stockholm Rust
  • Ferris' Fika Forum #31
• 2026-11-01 - 2026-11-03 | Italy, IN | RustLab
  • RustLab - The International Conference on Rust in Italy
• 2026-11-04 | Dublin, IE | Rust Dublin
  • Rust 263: Getting Started with the New Rust Driver for Oracle AI Database
• 2026-11-05 | Milano, IT | Rust Language Milan
  • Digital Model Trains & Rust: Bare-Metal DCC Command Station on ESP32

North America

• 2026-10-14 | Los Angeles, CA, US | Rust Los Angeles
  • Rust LA October: AI & Rust w/ Oxen.AI & Origin Lab!
• 2026-10-15 | Hybrid (Seattle, WA, US) | Seattle Rust User Group
  • October, 2026 SRUG (Seattle Rust User Group) Meetup
• 2026-10-17 | Boston, MA, US | Boston Rust Meetup
  • Central Cambridge Rust Lunch, Oct 17
• 2026-10-20 | San Francisco, CA, US | San Francisco Rust Study Group
  • Rust Hacking in Person
• 2026-10-21 | Hybrid (Vancouver, CA) | Vancouver Rust
  • Disposable Agent Sandboxes in Rust
• 2026-10-21 | San Francisco, CA, US | Bay Area Rust
  • Bay Area Rust - Embedded Meetup
• 2026-10-22 | New York, NY, US | Rust NYC
  • Rust NYC w/Bryan Cantrill - Code Matters: Reflections on Rust in the LLM Age
• 2026-10-24 | Boston, MA, US | Boston Rust Meetup
  • Davis Square Rust Lunch, Oct 24
• 2026-10-28 | Austin, TX, US | Rust ATX
  • Rust Lunch - Fareground
• 2026-10-31 | Boston, MA, US | Boston Rust Meetup
  • North End Rust Lunch, Oct 31
• 2026-11-05 | Saint Louis, MO, US | STL Rust
  • HTMX and Rust

South America

• 2026-11-07 | Planalto Paulista, BR | Rust São Paulo Meetup
  • Encontro do Rust-SP - Agora no Luma

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

I think that there are a nonzero number of people who are experts in the field who would genuinely respond to "how does C work?" with "it doesn't, next question"

– Clar Fon at the rust-lang zulip

Thanks to kleines Filmröllchen 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 Rust 1.99.0
• Generic Const Args and You
• [video] Rust Release Changelog - 1.99.0

Foundation

• A Fond Farewell To Three Rust Foundation Colleagues

Newsletters

• This Month in Rust OSDev: September 2026
• Rust Trends Issue 83 - NVIDIA Brings Rust to the GPU Kernel
• Rust Trends Issue 84 - Google Puts Agents on the Rust Rewrite

Project/Tooling Updates

• Generate PDFs from Rust with HTML and CSS
• Catharsis for Noisy Audio: A Pure-Rust Restoration Toolkit with No ffmpeg and No Black Boxes
• Release mold 3.0.0 · rui314/mold

Observations/Thoughts

• Rust for CPython (Python Language Summit 2026)
• Lies, damned lies, and Rust in the TechEmpower Web Framework Benchmarks
• Beyond the &
• The Performance Cost of RwLock in Our Read-Heavy Workload
• Shipping JPEG XL in Chrome
• Proving Rust Web Application Correctness with Lean 4
• Hardware-Aware Programming in Rust

Rust Walkthroughs

• The Missing Piece in Rust Error Handling
• Compiling the kernel with gccrs
• Declarative Macros in Rust: A Simple and Practical Introduction
• A dynamic drone fail-safe system that adapts as the situation changes.
• Build a Burglar Alarm with ESP32-C5 That Sends Telegram Alerts

Crate of the Week

This week's crate is karatepe, a statically typed localisation language and library.

Thanks to miro for the self-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.

• issuerd - Add a French (fr) message bundle for login pages and emails
• issuerd - Add proptest suites for issuerd-protocol parsers
• issuerd - Add an additional client installation provider (adapter config download format)
• ruxen - Expand globs in include
• ruxen - Use nginx's status reason phrases everywhere
• ruxen - Implement proxy_method

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.

• RustWeek 2027 | CFP closes 2027-01-10 | Utrecht, The Netherlands | Event date: 2027-05-24
• TokioConf 2027 | CFP closes 2026-11-30 | Portland, Oregon, USA | 2027-04-26 - 2027-04-27

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

653 pull requests were merged in the last week

Compiler

• add a single-entry parent SpanData cache
• add fast path to generalization
• optimize Cranelift with PGO

Library

• add mul_add_relaxed methods for floating-point types
• add std::fs::{Home|Media}Dirs
• expose Rc::is_unique
• stabilize CStr::display
• stabilize debug_closure_helpers

Cargo

• add new peak memory table to cargo timings enabled via -Zmem-stats
• config: Proper dotted tuple support with legacy fallback
• git: default to net.git-fetch-with-cli if git is present
• improved testsuite file permissions cleanup
• lint: Making the lint name a terminal hyperlink to docs
• trim-paths: stabilize profile.trim-paths
• use trusted publishing for Cargo crates

Rustdoc

• Correctly handle rustc_allow_incoherent_impl on primitive methods
• Correctly link to (imported) enum variants with "jump to def"
• Fix how Deref items are handled

Rustfmt

• items: format comments after where using clause_shape budget
• use saturating arithmetics for adjust_max_width

Clippy

• manual_range_patterns: support char and byte literal
• let_unit_value bail out if initializer is cfg-dependent
• extend needless_borrowed_reference to lint mutable ref patterns
• fix exponential-time performance bug in has_non_owning_mutable_access_inner
• improve items_after_test_module: don't let derive expansions hide trailing items
• new lint: unnecessary_as_slice
• optimize msrv calls (again)

Rust-Analyzer

• complete 'let' 'letm' in arm expr and closure expr
• complete turbofish when fn can't infer param
• do not suggest arg-list in expected callable arg
• fix unicode-ident, take 2
• add missing HIR database when running unresolved-references
• complete let in macro when expand at macro stmts
• don't panic on malformed let-pattern with mismatched or-arm arities
• generate variant for self in impl
• improve in-block heuristic check in nested ambiguous
• name-match ignore leading tailing underscore
• transform usage path when extract trait to module
• fixed Implement opaques_with_sub_unified_hidden_type for the next-sol…

Rust Compiler Performance Triage

A relatively quiet week, but a very positive one nonetheless. Highlights are a 3.1% improvement in rustdoc speed from not using the metadata based crate_hash for rustdoc runs, a 0.5% improvement from a new fast path in the trait solver, and a 0.4% improvement from a cache for the parents of SpanData.

Triage done by @JonathanBrouwer. Revision range: c1070d69..cc9a14f7

Summary:

4 Regressions, 3 Improvements, 1 Mixed; 5 of them in rollups 33 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:

• Change default branch to main
• f16b type

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 std::fs::{File, ReadDir, DirEntry} always needs_drop even when unsupported.
• [rustdoc] Add tabs to settings popover
• rustc: Stabilize the WebAssembly wide-arithmetic feature
• Error on non-literal expressions in doc attributes on macro calls
• stabilize ptr_cast_slice
• Add extra types to VaArgSafe
• Reject cfg on expressions that cannot be safely removed
• fn_addr_eq: we actually can guarantee basically nothing
• Stop using dlltool for generating import libraries on MinGW
• Stabilize ptr::try_cast_aligned
• [disposition: close] 1.99 beta crater regression: overflow evaluating the requirement

Compiler Team (MCPs only)

• Move hir::Params from Body of functions to FnDecl.
• MCP: Add -Zasync-panic for binary size
• Upstreaming BorrowSanitizer Experimentally in Nightly Rust

Language Reference

• Guarantee that the never type ! is zero-sized and 1-aligned.

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

• RFC: Add required-targets for workspace package selection
• RFC: unsafe global_asm
• Cromulent Copy closure captures
• RFC for limited crates.io self-service version deletion

This RFC will appear in the Call for Testing section of the next issue (#) of This Week in Rust (TWiR). You may remove the call-for-testing label. Please feel free to leave the call-for-testing label in place if you would like this RFC to appear again in another issue of TWiR.

Upcoming Events

Rusty Events between 2026-10-07 - 2026-11-04 🦀

Virtual

• 2026-10-07 | Virtual (Indianapolis, IN, US) | Indy Rust
  • Indy.rs - with Social Distancing
• 2026-10-08 | Virtual (Berlin, DE) | Rust Berlin
  • Rust Hack and Learn
• 2026-10-08 | Virtual (Nürnberg, DE) | Rust Nuremberg
  • Rust Nürnberg online
• 2026-10-10 | Virtual (Gdansk, PL) | Stacja IT Trójmiasto
  • [BEZPŁATNIE] Programowanie w języku Rust
• 2026-10-10 | Hybrid (Kuala Lumpur, Malaysia) | Rust Malaysia Meetup
  • Rust Meetup October 2026
• 2026-10-11 | Virtual (Bengaluru, India) | Embedded Rust Discord
  • Silicon Sundays 4
• 2026-10-13 | Virtual (Dallas, TX, US) | Dallas Rust User Meetup
  • Second Tuesday
• 2026-10-14 - 2026-10-17 | Hybrid (Barcelona, ES) | EuroRust
  • EuroRust 2026
• 2026-10-18 | Virtual (Dallas, TX, US) | Dallas Rust User Meetup
  • Rust Deep Learning: Third Sunday
• 2026-10-20 | Virtual (Washington, DC, US) | Rust DC
  • Mid-month Rustful
• 2026-10-21 | Hybrid (Vancouver, CA) | Vancouver Rust
  • Disposable Agent Sandboxes in Rust
• 2026-10-22 | Virtual (Berlin, DE) | Rust Berlin
  • Rust Hack and Learn
• 2026-10-22 | Virtual | Rust 🦀 Maven
  • Rust and the GPU from Native to Web: An Introduction to wgpu
• 2026-10-26 | Virtual | Rust 🦀 Maven
  • No Python was harmed: teaching a tiny MCU to learn as it goes
• 2026-10-27 | Virtual (Dallas, TX, US) | Dallas Rust User Meetup
  • Fourth Tuesday Rust Bookclub
• 2026-10-27 | Virtual (London, UK) | Women in Rust
  • Lunch & Learn: Reasoning with Async Rust
• 2026-10-29 | Virtual | Rust 🦀 Maven
  • Creating a hexadecimal editor in Rust
• 2026-11-01 | Virtual (Dallas, TX, US) | Dallas Rust User Meetup
  • Rust Deep Learning: First Sunday
• 2026-11-03 | Virtual (London, UK) | Women in Rust
  • 👋 Community Catch Up
• 2026-11-04 | Virtual (Indianapolis, IN, US) | Indy Rust
  • Indy.rs - with Social Distancing

Asia

• 2026-10-09 | Hybrid (Kuala Lumpur, MY) | Rust Malaysia Meetup
  • Rust Meetup August 2026
• 2026-11-03 | Tel Aviv-yafo, IL | Rust 🦀 TLV
  • In person Rust November 2026 at AWS in Tel Aviv

Europe

• 2026-10-08 | Oslo, NO | Rust Oslo
  • Rust Hack'n'Learn at Kampen Bistro
• 2026-10-08 | Geneva, CH | Rust Geneva
  • Rust Meetup Geneva
• 2026-10-14 | Barcelona, ES | BcnRust
  • 22nd bcnrust session
• 2026-10-14 - 2026-10-17 | Hybrid (Barcelona, ES) | EuroRust
  • EuroRust 2026
• 2026-10-20 | Leipzig, SN, DE | Rust - Modern Systems Programming in Leipzig
  • Creating a realtime web Multiuser Dungeon game with Dioxus
• 2026-10-22 | Karlsruhe, DE | Rust Hack & Learn Karlsruhe
  • Karlsruhe Rust Hack and Learn Meetup bei BlueYonder
• 2026-10-22 | Toulouse, FR | Rust Toulouse
  • Rust Toulouse Meetup - Rust & Python interoperability
• 2026-10-27 | Aarhus, DK | Rust Aarhus
  • Hack Night: Rust meets AI
• 2026-10-31 | Stockholm, SE | Stockholm Rust
  • Ferris' Fika Forum #31
• 2026-11-01 - 2026-11-03 | Italy, IN | RustLab
  • RustLab - The International Conference on Rust in Italy

North America

• 2026-10-08 | Lehi, UT, US | Utah Rust
  • Lightning Talks N' Chill
• 2026-10-08 | New York, NY, US | Rust NYC
  • Rust NYC: Zero Knowledge Proofs & GPUs in Rendering
• 2026-10-08 | San Diego, CA, US | San Diego Rust
  • San Diego Rust October Meetup - Back in person!
• 2026-10-10 | Boston, MA, US | Boston Rust Meetup
  • Back Bay Rust Lunch, Oct 10
• 2026-10-14 | Los Angeles, CA, US | Rust Los Angeles
  • Rust LA October: AI & Rust w/ Oxen.AI & Origin Lab!
• 2026-10-20 | San Francisco, CA, US | San Francisco Rust Study Group
  • Rust Hacking in Person
• 2026-10-21 | Hybrid (Vancouver, CA) | Vancouver Rust
  • Disposable Agent Sandboxes in Rust
• 2026-10-21 | San Francisco, CA, US | Bay Area Rust
  • Bay Area Rust - Embedded Meetup
• 2026-10-28 | Austin, TX, US | Rust ATX
  • Rust Lunch - Fareground

South America

• 2026-10-08 | Buenos Aires, AR | Rust en Español
  • WebApp Ergonomics y Secretos Distribuidos.

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

There ain't no rules here in Quote of the Week - it's survival of the wittest

– Simon Buchan on rust-users

Thanks to Jonas Fassbender 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

Newsletters

• Scientific Computing in Rust #22 (September 2026)
• The Embedded Rustacean Issue #81

Observations/Thoughts

• Can safe Rust ever beat Google's C Brotli?
• Building a DMA based driver for the RP2350 I2C (safety not included)
• Advanced soft-bodies for games with the Rapier physics engine
• Supporting native Rust in Workers with the new Emscripten target for wasm-bindgen
• Rusty thoughts on "Parse, don't validate"
• The state of SIMD in Rust in 2026
• How do you stop being a Rust novice?
• We Have Named Arguments at Home: a reply to the blog post Arguing about arguments mentioned in the last issue
• Upstream Rust maintenance report (August-September 2026)
• Rust in the kernel? What about Rust without the kernel!
• Compiling the kernel with gccrs
• Listening to the radio with Rust
• Native support for Rust on the GPU

Rust Walkthroughs

• How to speed up the Rust compiler in September 2026
• Building Real-Time Notifications with SSE and Pub/Sub
• Green Threads from Scratch
• A Type Stronger than the Sum of its Components
• Deser: Rethinking Rust Serialization
• Dropping Swift from our Bevy iOS crates
• Pining for Arc Downcasting in Rust
• Topcoat is pushing the boundary of server applications with Rust
• Rust Reborrowing, Aliasing, and Mutable References
• A very condensed introduction of the basics of Rust
• [video] Making Our GPUI App Interactive with State and Events
• [ES] Domain–Flow–Effects (DFE): an architecture designed for Rust

Miscellaneous

• [DE]Rust & Linux Community Event – November 20–21, 2026 @ TUXEDO, Augsburg – Help us choose the workshop topic

Crate of the Week

This week's crate is ying-profiler, a native Rust sampling memory profiler.

Thanks to Evan Chan for the self-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.

• unsynced - strace frontend fails on pwritev2 with offset -1 (current file offset)
• unsynced - Model hard links (link/linkat) instead of warning
• unsynced - Add an ext4 data=writeback persistence profile
• MemoryWhale - Cover friendly errors for incomplete mw arguments
• MemoryWhale - Lock down mw --help output
• dataprof - Remote Parquet refusal messages should say to download the file when the server ignores Range
• dataprof - ScoreBounds::dimension_scores docs still list estimated key counts as unbounded
• dataprof - The progress finished event under-counts rows when a row cap stops the incremental engine

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.

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

546 pull requests were merged in the last week

Compiler

• computing crate_hash from metadata encoding instead of HIR (implements #94878)
• detect missing else in let statement
• give noalias back to refs in closures
• implement forced keywords (k#)
• use SmallVec in LocalizedConstraintGraph

Library

• add Div and Mul for Complex<{float}>
• alloc: stabilise Allocator
• additional NonZero conversions
• allow elided ('static) lifetimes in thread_local!
• implement PartialEq<VecDeque<U>> for Vec<T>, &[T], &mut [T], [T; N], &[T; N] and &mut [T; N]
• make dropping an empty BTreeMap free
• stabilize SyncView
• stabilize Box::take
• stabilize Result::into_{ok,err}
• stabilize funnel_shifts (including const)
• stabilize mem::conjure_zst
• stabilize vec_try_remove
• use wrapping arithmetic in from_str_radix

Cargo

• builtin-deps: add builtin dependencies manifest syntax
• config: add build.profile, install.profile
• metadata: mirror package features in features_v2
• builtin-deps: fix builtin dependencies manifest validation
• diag: Don't report unused normal deps when static libs are skipped
• package: preserve feature metadata in normalized manifests

Rustdoc

• correctly check that an item is not doc(hidden) with --generate-link-to-definition
• fix intra doc link resolution when a doc comment is composed of both inner and outer doc comment
• fix invalid jump to def link when #[rustc_allow_incoherent_impl] is involved
• fix quadratic naming of duplicate sidebar links

Clippy

• while_let_loop: detect the pattern when the loop has a label
• add new try_from_instead_of_from_str lint
• don't suggest Box::leak in nonnull_unchecked_on_box_ptr
• fix collapsible_match consuming/mutation checking
• fix match_str_case matching str inside or patterns
• improve doc attr span tracking for proc-macro

Rust-Analyzer

• don't fail extension activation when the server fails to start
• add type_match relevance for type-alias
• coercion safe fn to unsafe fn
• complete 'false' in cfg attribute
• complete attr value inside string without quotes
• const eval cast of single-variant enum
• deduplicate 'derive' and 'test' attribute macro
• do not type match unknown type
• don't clear semantic tokens cache on refresh
• hover show impl header when impl with trait
• panic in async closures with higher-ranked trait bounds
• return UB instead of panicking when reading the discriminant of an uninhabited enum

Rust Compiler Performance Triage

This week was fairly positive. We had no pure regressions, and most of the results came from a few architectural improvements with mixed or mostly positive impact. Some improvements also come from addressing previously triaged regression caused by missing no_alias annotation for references in closures.

The biggest improvement this week is in rustdoc, from tackling quadratic behaviour when generating sidebar links. This was reported by a user, but the effect didn't show up in our benchmarks, so we added a special stress test for it.

Triage done by @panstromek. Revision range: 3670d253..c1070d69

Summary:

0 Regressions, 2 Improvements, 6 Mixed; 3 of them in rollups 26 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

• Stop using dlltool for generating import libraries on MinGW
• Stabilize ptr::try_cast_aligned
• [disposition: close] 1.99 beta crater regression: overflow evaluating the requirement
• implement FCW for rustc_allowed_through_unstable_modules items
• fix VisibleForLeakCheck in RegionOutlives fast path
• Stabilize debug_closure_helpers
• Support type-relative assoc item paths in generic param defaults & const param types
• FCW for #[panic_handler] on unsafe fn.
• Stabilize optimize attribute
• Allow unary operand types to be inferred later
• Feat - #[inline(always)] + #[target_feature(enable = "....")] #2
• Tracking Issue for CStr::display
• Syntactically reject leading parenthesized precise capturing lists in bare trait object types ((use<…>)+)

Rust RFCs

• f16b type

Cargo

• feat(trim-paths): stabilize profile.trim-paths

Compiler Team (MCPs only)

• Create new Tier 3 Target for QTEE: aarch64-unknown-qtee

No Items entered Final Comment Period this week for 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

• Make trait methods callable in const contexts, take III

Upcoming Events

Rusty Events between 2026-09-30 - 2026-10-28 🦀

Virtual

• 2026-09-30 | Virtual (Cardiff, UK) | Rust and C++ Cardiff
  • Operating Systems Book Club: Segmentation and Introduction to Paging
• 2026-10-01 | Virtual | Rust Foundation & JetBrains
  • Livestream: Smarter Coding Agents for Rust with Symposium
• 2026-10-02 | Virtual | Rust Girona
  • Sessió setmanal de codificació / Weekly coding session
• 2026-10-03 | Virtual (Amsterdam, NL) | Bevy Game Development
  • Bevy Meetup #14
• 2026-10-04 | Virtual (Dallas, TX, US) | Dallas Rust User Meetup
  • Rust Deep Learning: First Sunday
• 2026-10-06 | Virtual (London, UK) | Women in Rust
  • 👋 Community Catch Up
• 2026-10-07 | Virtual (Indianapolis, IN, US) | Indy Rust
  • Indy.rs - with Social Distancing
• 2026-10-08 | Virtual (Berlin, DE) | Rust Berlin
  • Rust Hack and Learn
• 2026-10-08 | Virtual (Nürnberg, DE) | Rust Nuremberg
  • Rust Nürnberg online
• 2026-10-10 | Virtual (Gdansk, PL) | Stacja IT Trójmiasto
  • [BEZPŁATNIE] Programowanie w języku Rust
• 2026-10-10 | Hybrid (Kuala Lumpur, Malaysia) | Rust Malaysia Meetup
  • Rust Meetup October 2026
• 2026-10-13 | Virtual (Dallas, TX, US) | Dallas Rust User Meetup
  • Second Tuesday
• 2026-10-14 - 2026-10-17 | Hybrid (Barcelona, ES) | EuroRust
  • EuroRust 2026
• 2026-10-18 | Virtual (Dallas, TX, US) | Dallas Rust User Meetup
  • Rust Deep Learning: Third Sunday
• 2026-10-20 | Virtual (Washington, DC, US) | Rust DC
  • Mid-month Rustful
• 2026-10-21 | Hybrid (Vancouver, CA) | Vancouver Rust
  • Disposable Agent Sandboxes in Rust
• 2026-10-22 | Virtual (Berlin, DE) | Rust Berlin
  • Rust Hack and Learn
• 2026-10-27 | Virtual (Dallas, TX, US) | Dallas Rust User Meetup
  • Fourth Tuesday Rust Bookclub
• 2026-10-27 | Virtual (London, UK) | Women in Rust
  • Lunch & Learn: Reasoning with Async Rust

Asia

• 2026-10-09 | Hybrid (Kuala Lumpur, MY) | Rust Malaysia Meetup
  • Rust Meetup August 2026

Europe

• 2026-09-30 | Basel, CH | Rust Basel
  • Rust Meetup #16 @ ERNI
• 2026-09-30 | Berlin, DE | Rust Berlin
  • Rust Berlin Talks: The next generation
• 2026-10-01 | Berlin, DE | Rust Berlin
  • Rust Berlin on location 🏳️‍🌈 – Edition 018
• 2026-10-01 | Oxford, GB | Oxford ACCU/Rust Meetup.
  • Embedded Rust for Duffers
• 2026-10-05 | München, DE | Rust Munich
  • Rust Munich 2026 / 3
• 2026-10-08 | Oslo, NO | Rust Oslo
  • Rust Hack'n'Learn at Kampen Bistro
• 2026-10-08 | Geneva, CH | Rust Geneva
  • Rust Meetup Geneva
• 2026-10-14 | Barcelona, ES | BcnRust
  • 22nd bcnrust session
• 2026-10-14 - 2026-10-17 | Hybrid (Barcelona, ES) | EuroRust
  • EuroRust 2026
• 2026-10-20 | Leipzig, DE | Rust - Modern Systems Programming in Leipzig
  • Topic TBD

North America

• 2026-10-01 | Saint Louis, MO, US | STL Rust
  • Building a Minimal, Rootless Container in Rust
• 2026-10-03 | Boston, MA, US | Boston Rust Meetup
  • Alewife Rust Lunch, Oct 3
• 2026-10-08 | Lehi, UT, US | Utah Rust
  • Lightning Talks N' Chill
• 2026-10-08 | New York, NY, US | Rust NYC
  • Rust NYC: Zero Knowledge Proofs & GPUs in Rendering
• 2026-10-08 | San Diego, CA, US | San Diego Rust
  • San Diego Rust October Meetup - Back in person!
• 2026-10-10 | Boston, MA, US | Boston Rust Meetup
  • Back Bay Rust Lunch, Oct 10
• 2026-10-14 | Los Angeles, CA, US | Rust Los Angeles
  • Rust LA October: AI & Rust w/ Oxen.AI & Origin Lab!
• 2026-10-20 | San Francisco, CA, US | San Francisco Rust Study Group
  • Rust Hacking in Person
• 2026-10-21 | Hybrid (Vancouver, CA) | Vancouver Rust
  • Disposable Agent Sandboxes in Rust
• 2026-10-21 | San Francisco, CA, US | Bay Area Rust
  • Bay Area Rust - Embedded Meetup
• 2026-10-28 | Austin, TX, US | Rust ATX
  • Rust Lunch - Fareground

South America

• 2026-10-08 | Buenos Aires, AR | Rust en Español
  • WebApp Ergonomics y Secretos Distribuidos.

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

The community is obnoxiously helpful. I asked a simple question on the Rust community Discord server. What is the best way to read a file in Rust? I expected a straightforward response. Instead, I got back a 2,000-word essay on the inner workings of IO, buffering, error handling, and ownership, plus links to four different blog posts and three different approaches depending on file size, and a working code example.

...

The Rust community has weaponized education against me. I'm now a better engineer than I was yesterday against my will.

– tris on youtube

Thanks to MusicalNinjaDad 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

• Be alert: targeted attacks on prominent Rustaceans
• GitHub Actions leaking secrets when Miri output is cached
• Maintainer spotlight: Alejandra González (@blyxyas)
• Announcing a Maintainer in Residence: Scott Schafer for the Cargo team

Foundation

• Guest Post: Rust Is Tier-1 Language at Microsoft

Project/Tooling Updates

• Fearless SIMD v1.0 is here
• Syncing Rust GCC backend or how to test Murphy's law
• Benchmarking Wild vs Mold

Observations/Thoughts

• Arguing about arguments
• Nine Rules for Vibe Validation of Vibe-Coded (Rust) Algorithms

Rust Walkthroughs

• [video] Understanding Rust Ownership by Building a Zero-Copy Log Line Parser
• Finding Bugs
• Why datadiff matches arrays by key instead of computing tree edit distance
• [video] RustCurious lesson 10: Three Ways to Fix Any Borrowing Error
• Solving for faster SHA-1 collision detection
• Small and secure Docker images for Rust: Alpine vs Debian vs Scratch

Crate of the Week

This week's crate is fastlogging-rs, a fast logger which supports 8 different programming languages.

Thanks to brmmm3 for the self-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.

RFCs

Rust

Rustup

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.

• sysknife - A successful automatic rollback renders to the operator as unknown
• sysknife - sysknife-setup --uninstall deletes .mcp.json whole, taking every other MCP server with it
• sysknife - audit export publishes request_hash, an unsalted hash over unredacted params, with no statement of its sensitivity
• Apache Iggy - Python SDK: expose consumer shutdown and offset drain timeout
• Apache Iggy - Python SDK: expose client disconnect and shutdown lifecycle methods

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.

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

618 pull requests were merged in the last week

Compiler

• A couple polonius constraints perf improvements
• AST lowering cleanups
• an assortment of polonius tweaks
• check tainted_by_error in LateLint
• even more cleanups for rustc_builtin_macros
• perf: keep the first macro syntax-context mapping inline
• suggest fully qualified path on method name collision

Library

• add Dir::try_clone
• add case mapping fast paths for Latin-1
• complex conjugate, negation and default
• constify comparison traits on sliced types
• implement const Iterator for Range
• stabilize CommandExt::show_window
• stabilize feature(trim_prefix_suffix) ({str,[T], Path}::trim_prefix and {str, [T]}::trim_suffix)
• stabilize windows_process_extensions_main_thread_handle

Cargo

• build-rs: make unstable compile
• account for (uplift) hardlinks when calculating clean file size
• fix: return correct package specs when resolving workspace deps
• remove -Zasymmetric-token / cargo:paseto
• report the number of errors with build.warnings='deny'

Rustdoc

• Correctly handle dyn trait methods linking for jump to def feature
• Correctly handle intra-doc links on inlined same item with different names

Clippy

• add must_use_without_reason lint
• fix const_trait_impl related infinite loop in needless_borrows_for_generic_args
• generalize extend_with_drain to VecDeque and BinaryHeap
• lint suboptimal_flops for mul_add, custom_abs and radians in const context
• lint nested format_args! for uninlined args

Rust-Analyzer

• prioritise required items in trait autocomplete
• support completions inside cfg!()
• support hover on cfg predicate
• complete cfg value in string
• correct order deprecated const in builtin ty
• not complete attr args when before exists args
• watch include roots recursively once, not every directory

Rust Compiler Performance Triage

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

• Types FCP v2: Supertrait item shadowing stabilization
• declare C and C-unwind as mutually ABI-compatible
• Distinguish repr(C) ZSTs from others in ABI compatibility rules
• Implement Default for NumBuffer
• rustc: Stabilize the WebAssembly wide-arithmetic feature
• Allow elided ('static) lifetimes in thread_local!
• Stabilize mem::conjure_zst
• Prevent mutating the global environment pointer in CommandExt::exec and opt to use execve and resolve path manually
• Stabilize debug_closure_helpers
• Additional NonZero conversions
• Stabilize funnel_shifts (including const)
• Stabilize Result::into_{ok,err}
• windows: stabilise inherit_handles

Cargo

• OUT_DIR is also set when running the program
• feat(config): Add build.profile, install.profile
• fix(git)!: Default to net.git-fetch-with-cli if git is present

Compiler Team (MCPs only)

• Create a new tier 3 target: wasm32-webp2
• Test wasm in CI with threads & unwinding

Leadership Council

• Formulate a trusted-contributors marker team
• Participation in Outreachy Dec 2026 (dedication of funds)

No Items entered Final Comment Period this week for Rust RFCs, Language Team, Language Reference 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 2026-09-23 - 2026-10-21 🦀

Virtual

• 2026-09-24 | Virtual (Berlin, DE) | Rust Berlin
  • Rust Hack and Learn
• 2026-09-24 | Virtual (Charlottesville, VA, US) | Charlottesville Rust Meetup
  • Rust Cells — Interior Mutability from Rust Core to Tock OS
• 2026-09-29 | Virtual (London, UK) | Women in Rust
  • Lunch & Learn: Crates, Tips & Tricks Lightning Talks - Bring your ideas!
• 2026-09-30 | Virtual (Cardiff, UK) | Rust and C++ Cardiff
  • Operating Systems Book Club: Segmentation and Introduction to Paging
• 2026-10-02 | Virtual | Rust Girona
  • Sessió setmanal de codificació / Weekly coding session
• 2026-10-04 | Virtual (Dallas, TX, US) | Dallas Rust User Meetup
  • Rust Deep Learning: First Sunday
• 2026-10-06 | Virtual (London, UK) | Women in Rust
  • 👋 Community Catch Up
• 2026-10-07 | Virtual (Indianapolis, IN, US) | Indy Rust
  • Indy.rs - with Social Distancing
• 2026-10-08 | Virtual (Berlin, DE) | Rust Berlin
  • Rust Hack and Learn
• 2026-10-08 | Virtual (Nürnberg, DE) | Rust Nuremberg
  • Rust Nürnberg online
• 2026-10-10 | Virtual (Gdansk, PL) | Stacja IT Trójmiasto
  • [BEZPŁATNIE] Programowanie w języku Rust
• 2026-10-13 | Virtual (Dallas, TX, US) | Dallas Rust User Meetup
  • Second Tuesday
• 2026-10-14 - 2026-10-17 | Hybrid (Barcelona, ES) | EuroRust
  • EuroRust 2026
• 2026-10-18 | Virtual (Dallas, TX, US) | Dallas Rust User Meetup
  • Rust Deep Learning: Third Sunday
• 2026-10-20 | Virtual (Washington, DC, US) | Rust DC
  • Mid-month Rustful
• 2026-10-21 | Hybrid (Vancouver, CA) | Vancouver Rust
  • Disposable Agent Sandboxes in Rust

Asia

• 2026-09-23 | Maharashtra, IN | Rust Pune
  • Exploring standard traits in Rust

Europe

• 2026-09-24 | Aarhus, DK | Rust Aarhus
  • Talk Night at SkyTEM
• 2026-09-24 | Amsterdam, NL | Rust Developers Amsterdam Group
  • Rust Meetup @ BlockTech
• 2026-09-24 | Frankfurt, DE | Rust Rhein-Main
  • AI Agentic Coding
• 2026-09-24 | London, UK | Rust London User Group
  • Rust London, Lloyds Banking Group, with Luca Palmieri & Mainmatter
• 2026-09-25 | Edinburgh, UK | Rust and Friends
  • Rust and Friends (daytime coffee)
• 2026-09-26 | Stockholm, SE | Stockholm Rust
  • Ferris' Fika Forum #30
• 2026-09-28 | Augsburg, DE | Rust Meetup Augsburg
  • Rust Meetup #21: Maximilian Grauvogl & Marcel Fink - From Bits to Bugs: A Rust generator for SUIT Manifests and Structure-Aware Parser Fuzzing
• 2026-09-29 | Manchester, UK | Rust Manchester
  • Rust Manchester September Code Night
• 2026-09-29 | Milano, IT | Rust Language Milan
  • Why Rust is not really OOP?
• 2026-09-30 | Basel, CH | Rust Basel
  • Rust Meetup #16 @ ERNI
• 2026-09-30 | Berlin, DE | Rust Berlin
  • Rust Berlin Talks: The next generation
• 2026-10-05 | München, DE | Rust Munich
  • Rust Munich 2026 / 3
• 2026-10-08 | Oslo, NO | Rust Oslo
  • Rust Hack'n'Learn at Kampen Bistro
• 2026-10-10 | Geneva, CH | Rust Geneva
  • Rust Meetup Geneva
• 2026-10-14 | Barcelona, ES | BcnRust
  • 22nd bcnrust session
• 2026-10-14 - 2026-10-17 | Hybrid (Barcelona, ES) | EuroRust
  • EuroRust 2026
• 2026-10-20 | Leipzig, DE | Rust - Modern Systems Programming in Leipzig
  • Topic TBD

North America

• 2026-09-23 | Austin, TX, US | Rust ATX
  • Rust Lunch - Fareground
• 2026-09-23 | Austin, TX, US | Rust ATX
  • Rust Lunch - Fareground
• 2026-09-24 | Atlanta, GA, US | Rust Atlanta
  • Rust-Atl
• 2026-09-26 | Boston, MA, US | Boston Rust Meetup
  • Harvard Rust Lunch, Sep 26
• 2026-10-01 | Saint Louis, MO, US | STL Rust
  • Building a Minimal, Rootless Container in Rust
• 2026-10-03 | Boston, MA, US | Boston Rust Meetup
  • Alewife Rust Lunch, Oct 3
• 2026-10-08 | San Diego, CA, US | San Diego Rust
  • San Diego Rust October Meetup - Back in person!
• 2026-10-10 | Boston, MA, US | Boston Rust Meetup
  • Back Bay Rust Lunch, Oct 10
• 2026-10-14 | Los Angeles, CA, US | Rust Los Angeles
  • Rust LA October: AI & Rust w/ Oxen.AI & Origin Lab!
• 2026-10-20 | San Francisco, CA, US | San Francisco Rust Study Group
  • Rust Hacking in Person
• 2026-10-21 | Hybrid (Vancouver, CA) | Vancouver Rust
  • Disposable Agent Sandboxes in Rust

Oceania

• 2026-09-29 | Barton, AU | Canberra Rust User Group
  • September Meetup

South America

• 2026-10-08 | Buenos Aires, AR | Rust en Español
  • WebApp Ergonomics y Secretos Distribuidos.

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

operational pedantics

– Clar Fon on rust zulip

Thanks to Jules Bertholet 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