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.
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Updates from Rust Community
Official
Announcing Rust 1.94.1
Program management update — February 2026
Foundation
Rust Foundation Joins Datadog’s Open Source Program
Project/Tooling Updates
Ntpd-rs: it's about time!
octopos: OS for risc-v in rust
Building a guitar trainer with embedded Rust
blogr v0.5.0 - blog without from your terminal
feedr v0.7.0 - terminal-based RSS/Atom feed reader
mdterm v2.0.0 - terminal-based Markdown browser
RustGrep: simple search for 114 Rust blogs
Rust's next-generation trait solver
Portable Async Rust
jsongrep faster than {jq, jmespath, jsonpath-rust, jql}
SeqPacker: 11 bin-packing algorithms in Rust
flodl v0.2.2: PyTorch parity in Rust
Observations/Thoughts
filtra.io | Breaking The AI Infra Monopoly With Rust- Tracel AI
Rust: Memory safety in kernel space | OSHub
Fixing our own problems in the Rust compiler
Bugs that the Rust compiler catches for you: The revolution of compiler-enforced correctness
I ported the OpenAI Python SDK to Rust in 5 days with Claude Code
[video] � Rust (mir) compiler bites: Closures — thou shalt not name this struct
[video] How C++ Finally Beats Rust at JSON Serialization
Rust Walkthroughs
Adding WASM Plugins to Your App
ZK snarks for rust developer part 3/8
Building a Crash-Safe Email Queue in Rust
Adding a Scripting Engine to a Rust CLI with Rhai
Crate of the Week
This week's crate is tsastat, a high-resolution Thread State Analysis (TSA) tool for Linux.
Thanks to Ankur Rathore 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.
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.
NDC Techtown | CFP open until 2024-04-14 | Kongsberg, Norway | 2024-09-09 - 2026-09-12.
EuroRust | CFP open until 2026-04-27 | Barcelona, Spain | 2026-10-14 - 2026-10-17
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
487 pull requests were merged in the last week
Compiler
add x86_64-unknown-linux-gnu{m,t}san target which enables {M,T}San by default
add -Zsanitize=kernel-hwaddress
Library
constify Step trait and all of its implementations
constify comparisons and Clone for core::mem::Alignment
constify const Fn*: Destruct
don't drop arguments' temporaries in dbg!
don't fuse in MapWindows
implement unchecked_funnel_{shl,shr}
reimplement hash_map! macro
make PinCoerceUnsized require Deref
stabilize new RangeFrom type and iterator
trim_prefix for paths
Cargo
resolver: better match rustc in error styling
build: cover more behavior of build.warnings
build: make it easier to review build.warnings behavior
Rustdoc
rustdoc rejects html emits with json output
Rustfmt
prevent panic when rewritng associated item delegations
Clippy
add manual_option_zip lint (a.and_then(|x| b.map(|y| (x, y))))
impl manual_noop_waker lint
explicit_counter_loop: suggest .take(n) for for _ in 0..n co…
iter_kv_map: handle identity map for map and flat_map
manual_pop_if: lint more cases, even if we do not provide a suggestion
fix collapsible_if false positive when the inner if contains cfg
preserve parentheses in suggestion in presence of cascaded casts
perf: reduce matching_root_macro_call usage (23b → 22.24b)
Rust-Analyzer
fix not applicable on ambiguous ident pat for merge_match_arms
complete envs in nested env!()
correct type_or_const param index bound in debug_assert
correct missing-args messages for sched_getaffinity and getenv shims
don't panic unmerge arm on trailing pipe
fix block lowering in ast id map
keep comments for 'Fill match arms'
postfix completions include nots prefix-expr
skip usages inside macro expansions in destructure struct/tuple binding
turn back TyLoweringContext.store to self after lowering parent defaults
wrap Option for desugar_try_expr_let_else
wrap Result for desugar_try_expr_let_else
wrap ty-anchor in non-path type constuctor
fully implement VariantFields expression support
hookup Signature Inference in more places
only allocate item blocks if they actually contain items or statement macros
remove Arc from GenericParams and AstIdMap
remove generate trait impl text intransitive from utils
Rust Compiler Performance Triage
We had some infrastructure troubles this week which prevented some rollup PRs from generating their
"unrolled" builds, which made rollup regression investigation more complicated, although we were
able to locate and revert the largest rollup regressions in the end. #154304 brought some nice improvements by optimizing the query system.
Triage done by @kobzol.
Revision range: 6f22f613..cf7da0b7
Summary:
(instructions:u)
mean
range
count
Regressions ❌
(primary)
0.4%
[0.1%, 1.2%]
4
Regressions ❌
(secondary)
0.3%
[0.1%, 0.5%]
12
Improvements ✅
(primary)
-0.8%
[-6.2%, -0.2%]
58
Improvements ✅
(secondary)
-0.4%
[-1.9%, -0.1%]
28
All ❌✅ (primary)
-0.8%
[-6.2%, 1.2%]
62
3 Regressions, 4 Improvements, 2 Mixed; 2 of them in rollups
35 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:
Mitigation enforcement
Add homogeneous_try_blocks
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
Tracking Issue for isolate_most_least_significant_one
Tracking Issue for int_lowest_highest_one
Tracking Issue for uint_bit_width
Tracking Issue for #138068: Add Result::map_or_default and Option::map_or_default
Do not use non-wf input expectations from fudge when checking function calls
Syntactically reject equality predicates
Tracking Issue for tcp_deferaccept
stabilize s390x vector registers
Replacing self overwriting with proper resolution
Rust RFCs
build-std: always
No Items entered Final Comment Period this week for
Cargo,
Compiler Team (MCPs only),
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
RFC: Associated traits
Add *be present* contribution policy
initial draft for 2026 project goals
Upcoming Events
Rusty Events between 2026-04-01 - 2026-04-29 �
Virtual
2026-03-26 | Virtual (Berlin, DE) | Rust Berlin
Rust Hack and Learn
2026-03-31 | Virtual (Tel Aviv-yafo, IL) | Code Mavens � - � - �
Web development using axum in Rust - part 1
2026-04-01 | Virtual (Girona, ES) | Rust Girona
Sessió setmanal de codificació / Weekly coding session
2026-04-01 | Virtual (Indianapolis, IN, US) | Indy Rust
Indy.rs - with Social Distancing
2026-04-02 | Virtual (Nürnberg, DE) | Rust Nuremberg
Rust Nürnberg online
2026-04-04 | Virtual (Kampala, UG) | Rust Circle Meetup
Rust Circle Meetup
2026-04-05 | Virtual (Dallas, TX, US) | Dallas Rust User Meetup
Rust Deep Learning: First Sunday
2026-04-07 | Virtual (Tel Aviv-yafo, IL) | Code Mavens � - � - �
Web development using axum in Rust - part 2
2026-04-09 | Virtual (Berlin, DE) | Rust Berlin
Rust Hack and Learn
2026-04-14 | Virtual (Tel Aviv-yafo, IL) | Code Mavens � - � - �
Web development using axum in Rust - part 3
2026-04-14 | Virtual (Dallas, TX, US) | Dallas Rust User Meetup
Second Tuesday
2026-04-14 | Virtual (London, UK) | Women in Rust
� Community Catch Up
2026-04-15 | Virtual (Girona, ES) | Rust Girona
Weekly coding session
2026-04-15 | Virtual (Vancouver, BC, CA) | Vancouver Rust
Nushell
2026-04-16 | Hybrid (Seattle, WA, US) | Seattle Rust User Group
April, 2026 SRUG (Seattle Rust User Group) Meetup
2026-04-19 | Virtual (Dallas, TX, US) | Dallas Rust User Meetup
Rust Deep Learning: Third Sunday
2026-04-21 | Virtual (Washington, DC, US) | Rust DC
Mid-month Rustful
2026-04-22 | Virtual (Girona, ES) | Rust Girona
Weekly coding session
2026-04-23 | Virtual (Amsterdam, NL) | Bevy Game Development
Bevy Meetup #13
2026-04-23 | Virtual (Berlin, DE) | Rust Berlin
Rust Hack and Learn
2026-04-28 | Virtual (Dallas, TX, US) | Dallas Rust User Meetup
Fourth Tuesday
2026-04-28 | Virtual (London, UK) | Women in Rust
Lunch & Learn: From Protobuf to Production - A Guide to gRPC in Rust
2026-04-29 | Virtual (Girona, ES) | Rust Girona
Weekly coding session
Asia
2026-04-11 | Bangalore, IN | Rust Bangalore
April 2026/Pre-Conference Rustacean meetup
2026-04-17 | Bangalore, IN | Rust India
Rust India Workshop
2026-04-18 | Bangalore, IN | Rust India
Rust India Conference
Europe
2026-04-01 | Berlin, DE | Rust Berlin
Rust Berlin Talks: The next generation
2026-04-01 | Edinburgh, UK | Rust and Friends
Rust and Friends (evening pub)
2026-04-01 | Köln, DE | Rust Cologne
Rust in April: From Zero to Rust
2026-04-01 | Oxford, UK | Oxford ACCU/Rust Meetup.
It came from another dimension!
2026-04-02 | London, UK | Rust London User Group
LDN Talks Spring Community Showcase
2026-04-02 | Toulouse, FR | Rust Toulouse
Rust Toulouse Meetup - Release, Servers & Ray Tracing Demystified
2026-04-03 | Edinburgh, UK | Rust and Friends
Rust and Friends (daytime coffee)
2026-04-07 | Basel, CH | Rust Basel
Rust Meetup #15 @ letsboot
2026-04-07 | Frankfurt, DE | Rust Rhein-Main
Building a drone from scratch with Rust (and some hardware)
2026-04-08 | Virtual (Girona, ES) | Rust Girona
Rust Girona Hack & Learn 04 2026
2026-04-09 | Geneva, CH | Rust Meetup Geneva
Rust Meetup Geneva
2026-04-09 | Oslo, NO | Rust Oslo
Rust talks @ AutoStore – "Patterns for Event Driven Systems" and "Rust + WASM"
2026-04-21 | Leipzig, DE | Rust - Modern Systems Programming in Leipzig
Native GUIs with Rust
2026-04-23 | Aarhus, DK | Rust Aarhus
Talk Night and Birthday Party at MFT Energy
North America
2026-04-02 | Mountain View, CA, US | Hacker Dojo
RUST MEETUP at HACKER DOJO
2026-04-02 | Saint Louis, MO, US | STL Rust
SIUE Cruft Crawler with LLM
2026-04-04 | Boston, MA, US | Boston Rust Meetup
Winter Hill Rust Lunch, Apr 4
2026-04-07 | New York, NY, US | Rust NYC
Rust NYC: The Open Source Special
2026-04-09 | Chicago, IL, US | Chicago Rust Meetup
Rust Happy Hour
2026-04-09 | San Diego, CA, US | San Diego Rust
San Diego Rust April Meetup - Back in person!
2026-04-11 | Boston, MA, US | Boston Rust Meetup
Brookline Rust Lunch, Apr 11
2026-04-14 | Charlottesville, VA, US | Charlottesville Rust Meetup
Sharpening Your Rust Skills for Job Interviews
2026-04-15 | Hybrid (Vancouver, BC, CA) | Vancouver Rust
Nushell
2026-04-16 | Hybrid (Seattle, WA, US) | Seattle Rust User Group
April, 2026 SRUG (Seattle Rust User Group) Meetup
2026-04-18 | Boston, MA, US | Boston Rust Meetup
Harvard Square Rust Lunch, Apr 18
2026-04-20 - 2026-04-22 | Portland, OR | Tokio
TokioConf 2026
2026-04-21 | San Francisco, CA, US | San Francisco Rust Study Group
Rust Hacking in Person
2026-04-22 | Austin, TX, US | Rust ATX
Rust Lunch - Fareground
2026-04-23 | Los Angeles, CA, US | Rust Los Angeles
Rust LA April!
2026-04-25 | Boston, MA, US | Boston Rust Meetup
South Station Rust Lunch, Apr 25
Oceania
2026-04-09 | Brisbane City, QL, AU | Rust Brisbane
Rust Brisbane Apr 2026
South America
2026-04-11 | Buenos Aires, AR | Oxidar Org
Oxidar.org Hackaton - Snakear - ¡Veni a hackear con Rust!
2026-04-17 | Rio de Janeiro, BR | Meetups Rust RJ
Meetup Rust RJ
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
When you do cursed things, problems find you.
– Folkert de Vries on the trifecta tech blog
We have gone four weeks bare of suggestions for quotes. llogiq is still fine with his choice, but he'd be much more happy if any of you would help him in his search.
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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