This Week In Rust 514#

2023-09-27

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 on Twitter 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.

Updates from Rust Community#

Official#

• Increasing the minimum supported Apple platform versions
• crates.io Policy Update RFC

Project/Tooling Updates#

• Meilisearch 1.4 - new features, including custom text separators, and user-definded dictionary
• cargo-binstall Release v1.4.1

Observations/Thoughts#

• Interacting with AWS IAM services using the Rust SDK and stand-alone CLI
• My Pure Rust Wishlist
• Qualifying Rust without forking
• Why Not Rust Crypto?
• Eyra is an interesting Rust project
• Generic trait methods and new auto traits
• Rust for Mission Critical Applications
• Polonius revisited, part 1
• Scaling Rust Adoption Through Training

Rust Walkthroughs#

• Hello, Rust!
• Rust: The joy of safe zero-copy parsers
• Cross-compiling Rust on Github Actions
• [video] Build Your First Game in Bevy and Rust
• [video] no_std: ?no_problem

Research#

• How do Rust developers use unsafe? - Survey

Miscellaneous#

• Using Kani to write and validate Rust code with ChatGPT
• Logging in Rust - How to Get Started
• Profiling with perf and DHAT on Rust code in Linux
• Adding runtime benchmarks to the Rust compiler benchmark suite
• ESP Embedded Rust: Multithreading with FreeRTOS Bindings
• A JVM in Rust part 6 - Methods and exceptions
• [audio] RustShip: Atuin - Shell history sync, search and backup with Ellie Huxtable

Crate of the Week#

This week's crate is async_fn_traits, a crate with async function traits to enable using higher ranked trait bounds in async functions.

Thanks to kornel for the suggestion!

Please submit your suggestions and votes for next week!

Call for Participation#

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.

• Hyperswitch - add multiple insert and delete functionality for in-memory cache
• Hyperswitch - add metrics to cache invalidation miss
• Hyperswitch - separate payments_session from payments core
• nix-rust - next generation maintainers
• DeepCausality - Increase Test Coverage
• DeepCausality - Polish documentation
• rust-libp2p - replace custom-clippy alias with workspace-wide [lints] configuration
• rust-libp2p - Prefer tokio runtime everywhere
• rust-libp2p - misc: make RwStreamSink an implementation detail of the memory transport
• time - Missing panic condition on API docs
• time - Add comparison to chrono to the docs
• time - The Book is hardly readable
• Ockam - ockam status clap command should provide more user friendly information when a user is not enrolled
• Ockam - ockam status clap command should provide more user friendly information when a user is enrolled
• Ockam - Improve ockam enroll ----help clap command text by adding doc comment for verbose flag

If you are a Rust project owner and are looking for contributors, please submit tasks here.

Updates from the Rust Project#

402 pull requests were merged in the last week

• breaking change: Validate crate name in --extern

• add support for GNU/Hurd

• enable ASAN/LSAN/TSAN for *-apple-ios-macabi

• raise minimum supported Apple OS versions

• rustc_target/loongarch: Fix passing of transparent unions with only one non-ZST member

• rustc_target/riscv: Fix passing of transparent unions with only one non-ZST member

• rustc_hir_analysis: add a helper to check function the signature mismatches

• account for nested impl Trait in TAIT

• add minimal std implementation for UEFI

• add OwnedTargetMachine to manage llvm:TargetMachine

• add Zba, Zbb, and Zbs as target features for riscv64-linux-android

• add initial libstd support for Xous

• adjust ConstValue::Slice to work for arbitrary slice types

• adjust how closure/generator types are printed

• allow -Z treat-err-as-bug=0

• allow anyone to set llvm-fixed-upstream

• allow higher-ranked fn sigs in ValuePairs

• capture scrutinee of if let guards correctly

• check that closure/generator's interior/capture types are sized

• command: also print removed env vars

• correctly deny late-bound lifetimes from parent in anon consts and TAITs

• coverage: don't bother renumbering expressions on the Rust side

• coverage: fix an unstable-sort inconsistency in coverage spans

• coverage: remove debug code from the instrumentor

• dependencies: reduce the amount of crates pulling in atty

• detect cycle errors hidden by opaques during monomorphization

• diagnostics: avoid mismatch between variance index and hir generic

• do not create a DerefLen place for Box<[T]>

• don't ICE when no bound vars found while doing closure hir type check

• don't complain on a single non-exhaustive 1-ZST

• don't modify libstd to dump rustc ICEs

• don't resolve generic impls that may be shadowed by dyn built-in impls

• enable -Zdrop-tracking-mir by default

• enable effects for libcore

• fall back to _SC_NPROCESSORS_ONLN if sched_getaffinity returns an empty mask

• fall back to the unoptimized implementation in read_binary_file if File::metadata lies

• fix ui-fulldeps --stage=1 with -Zignore-directory-in-diagnostics-source-blocks

• fix confusing let chain indentation in rustc_resolve

• fix debug printing of tuple

• give FutureIncompatibilityReason variants more explicit names

• implement Literal::byte_character

• implement intercrate_ambiguity_causes in the new solver

• improve invalid UTF-8 lint by finding the expression initializer

• interpret: more consistently use ImmTy in operators and casts

• make unsized casts illegal

• match on elem first while building move paths

• more accurate suggestion for self. and Self::

• move DepKind to rustc_query_system and define it as u16

• pass name of object file to LLVM so it can correctly emit S_OBJNAME in pdb files on Windows

• point at cause of expectation of break value when possible

• prevent promotion of const fn calls in inline consts

• suggest desugaring to return-position impl Future when an async fn in trait fails an auto trait bound

• tweak expected message to explain what it's actually signifying

• miri: GC the Stacked Borrows allocation history

• miri: deprecate -Zmiri-disable-abi-check

• miri: implement llvm.ctpop.v* intrinsics

• miri: issue discovered in TB: spurious reads are not (yet) possible in a concurrent setting

• miri: move llvm.x86.* shims into shims::x86 and implement _addcarry_u32 and _subborrow_u{32,64}

• open the FileEncoder file for reading and writing

• simplify/Optimize FileEncoder

• avoid overflow in IoSlice::advance_slices

• call panic_display directly in const_panic_fmt

• implement cstr_count_bytes

• panic when encountering an illegal cpumask in thread::available_parallelism

• add the cfg_match! macro

• cargo: add some enhancements to cargo clean

• cargo: better suggestion for redundant mode in build and install commands

• cargo: buffer console status messages

• cargo: cargo add displays either feature list or summarized count

• cargo: doc: mention unstable flag -Z asymmetric-token

• cargo: fix spurious errors with networking tests

• cargo: fix: copy PDBs for EFI targets

• cargo: fix: use channel-specific link for registry auth error

• cargo: infra: add auto-trigger rules for new labels

• cargo: more specific registry index not found msg

• cargo: shortest path

• rustdoc-search: add support for type parameters

• rustdoc: correctly render the return type of cross-crate async fns

• rustdoc: custom code classes in docs warning

• rustfmt: bugfix/comment duplication

• clippy: redundant_guards: lint if the pattern is on the left side

• clippy: change defaults of accept-comment-above-statement and accept-comment-above-attributes

• clippy: fix false positive with needless_raw_string_hashes

• clippy: fix cast_lossless with macro call

• clippy: fix mutably used async function argument in closure for needless_pass_by_ref_mut

• clippy: fixed caused by moving &mut reference inside of a closure

• clippy: prevent ice when threshold is 0 and enum has no variants

• clippy: remove most usage of hir_ty_to_ty

• rust-analyzer: add unused_variables native diagnostic

• rust-analyzer: add option to show full function signatures in completion docs

• rust-analyzer: deunwrap add_missing_match_arms

• rust-analyzer: do not resolve inlayHint.textEdit for VSCode client

• rust-analyzer: bool to enum assist

• rust-analyzer: fix autoimport does nothing when importing trait that is as _ imports

• rust-analyzer: fix inlining closures from local variables and functions

• rust-analyzer: give unmerge_use a label explaining what it will affect

Upcoming Events#

Rusty Events between 2023-09-27 - 2023-10-25 🦀

Virtual#

• 2023-10-03 | Virtual (Buffalo, NY, US) | Buffalo Rust Meetup
  • Buffalo Rust User Group, First Tuesdays
• 2023-10-04 | Virtual (Stuttgart, DE) | Rust Community Stuttgart
  • Rust-Meetup
• 2023-10-04 | Virtual (Various) | Ferrous Systems
  • A Decade of Rust with Ferrous Systems
• 2023-10-04 | Virtual (Cardiff, UK)| Rust and C++ Cardiff
  • Understanding the Processor (Atomics & Locks Chapter 7)
• 2023-10-05 | Virtual (Charlottesville, NC, US) | Charlottesville Rust Meetup
  • Crafting Interpreters in Rust Collaboratively
• 2023-10-07 | Virtual (Kampala, UG) | Rust Circle Kampala
  • Rust Circle Meetup: Mentorship (First Saturday)
• 2023-10-10 | Virtual (Berlin, DE) | OpenTechSchool Berlin
  • Rust Hack and Learn | Mirror
• 2023-10-10 | Virtual (Dallas, TX, US) | Dallas Rust
  • Second Tuesday
• 2023-10-11| Virtual (Boulder, CO, US) | Boulder Elixir and Rust
  • Monthly Meetup
• 2023-10-12 - 2023-10-13 | Virtual (Brussels, BE) | EuroRust
  • EuroRust 2023
• 2023-10-12 | Virtual (Nuremberg, DE) | Rust Nuremberg
  • Rust Nürnberg online
• 2023-10-18 | Virtual (Vancouver, BC, CA) | Vancouver Rust
  • Rust Study/Hack/Hang-out
• 2023-10-19 | Virtual (Charlottesville, NC, US) | Charlottesville Rust Meetup
  • Crafting Interpreters in Rust Collaboratively
• 2023-10-19 | Virtual (Stuttgart, DE) | Rust Community Stuttgart
  • Rust-Meetup
• 2023-10-24 | Virtual (Berlin, DE) | OpenTechSchool Berlin

  • Rust Hack and Learn | Mirror

Asia#

• 2023-10-03 | Taipei, TW | WebAssembly and Rust Meetup (Wasm Empowering AI)

  • WebAssembly Meetup (Wasm Empowering AI) in Taipei

Europe#

• 2023-09-28 | Berlin, DE | React Berlin
  • React Berlin September Meetup: Creating Videos with React & Remotion & More: Integrating Rust with React Native – Gheorghe Pinzaru
• 2023-09-28 | Madrid, ES | MadRust
  • Primer evento Post COVID: ¡Cervezas MadRust!
• 2023-09-28 | Paris, FR | Paris Scala User Group (PSUG)
  • PSUG #114 Comparons Scala et Rust
• 2023-09-28 | Vienna, AT | Rust Vienna
  • Rust Dojo 2
• 2023-09-30 | Saint Petersburg, RU | Rust Saint Petersburg meetups
  • Rust Community Meetup: A tale about how I tried to make my Blitz Basic - Vitaly; How to use nix to build projects on Rust – Danil; Getting to know tower middleware. General overview – Mikhail
• 2023-10-04 | Lyon, FR | Rust Lyon
  • Rust Lyon Meetup #6
• 2023-10-10 | Berlin, DE | OpenTechSchool Berlin
  • Rust Hack and Learn
• 2023-10-12 - 2023-10-13 | Brussels, BE | EuroRust
  • EuroRust 2023
• 2023-10-12 | Brussels, BE | Rust Aarhus
  • Rust Aarhus - EuroRust Conference
• 2023-10-12 | Reading, UK | Reading Rust Workshop
  • Reading Rust Meetup at Browns
• 2023-10-17 | Helsinki, FI | Finland Rust-lang Group
  • Helsinki Rustaceans Meetup
• 2023-10-17 | Leipzig, DE | Rust - Modern Systems Programming in Leipzig
  • SIMD in Rust
• 2023-10-25 | Dublin, IE | Rust Dublin

  • Biome, web development tooling with Rust

North America#

• 2023-09-27 | Austin, TX, US | Rust ATX
  • Rust Lunch - Fareground
• 2023-09-28 | Boulder, CO, US | Solid State Depot - The Boulder Makerspace
  • Rust and ROS for Robotics + Happy Hour
• 2023-10-05 | Mountain View, CA, US | Mountain View Rust Meetup
  • Rust Meetup at Hacker Dojo
• 2023-10-11 | Boulder, CO, US | Boulder Rust Meetup
  • First Meetup - Demo Day and Office Hours
• 2023-10-12 | Lehi, UT, US | Utah Rust
  • The Actor Model: Fearless Concurrency, Made Easy w/Chris Mena
• 2023-10-17 | San Francisco, CA, US | San Francisco Rust Study Group
  • Rust Hacking in Person
• 2023-10-19 | Mountain View, CA, US | Mountain View Rust Meetup
  • Rust Meetup at Hacker Dojo
• 2023-10-19 | Nashville, TN, US | Music City Rust Developers
  • Rust Meetup : Getting to Know search other
• 2023-10-19 | Seattle, WA, US | Seattle Rust User Group

  • Seattle Rust User Group - October Meetup

Oceania#

• 2023-09-28 | Brisbane, QLD, AU | Rust Brisbane
  • September 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#

The problem with Rust it appears,
that it leaves programmers in tears
if they have to go back
to languages that lack
in short they've got feature-arrears.

– llogiq on /r/rust

Thanks to Frank Steffahn for the suggestion!

Please submit quotes and vote for next week!

This Week in Rust is edited by: nellshamrell, llogiq, cdmistman, ericseppanen, extrawurst, andrewpollack, U007D, kolharsam, joelmarcey, mariannegoldin, bennyvasquez.

Email list hosting is sponsored by The Rust Foundation

Discuss on r/rust