This Week In Rust 516#

2023-10-11

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#

• Announcing Rust 1.73.0
• Polonius update

Project/Tooling Updates#

• rust-analyzer changelog #202
• Announcing: pid1 Crate for Easier Rust Docker Images - FP Complete
• bit_seq in Rust: A Procedural Macro for Bit Sequence Generation
• tcpproxy 0.4 released
• Rune 0.13
• Rust on Espressif chips - September 29 2023
• esp-rs quarterly planning: Q4 2023
• Implementing the #[diagnostic] namespace to improve rustc error messages in complex crates

Observations/Thoughts#

• Safety vs Performance. A case study of C, C++ and Rust sort implementations
• Raw SQL in Rust with SQLx
• Thread-per-core
• Edge IoT with Rust on ESP: HTTP Client
• The Ultimate Data Engineering Chadstack. Running Rust inside Apache Airflow
• Why Rust doesn't need a standard div_rem: An LLVM tale - CodSpeed
• Making Rust supply chain attacks harder with Cackle
• [video] Rust 1.73.0: Everything Revealed in 16 Minutes

Rust Walkthroughs#

• Let's Build A Cargo Compatible Build Tool - Part 5
• How we reduced the memory usage of our Rust extension by 4x
• Calling Rust from Python
• Acceptance Testing embedded-hal Drivers
• 5 ways to instantiate Rust structs in tests

Research#

• Looking for Bad Apples in Rust Dependency Trees Using GraphQL and Trustfall

Miscellaneous#

• Rust, Open Source, Consulting - Interview with Matthias Endler
• Edge IoT with Rust on ESP: Connecting WiFi
• Bare-metal Rust in Android
• [audio] Learn Rust in a Month of Lunches with Dave MacLeod
• [video] Rust 1.73.0: Everything Revealed in 16 Minutes
• [video] Rust 1.73 Release Train
• [video] Why is the JavaScript ecosystem switching to Rust?

Crate of the Week#

This week's crate is yarer, a library and command-line tool to evaluate mathematical expressions.

Thanks to Gianluigi Davassi for the self-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.

• Ockam - Make ockam node delete (no args) interactive by asking the user to choose from a list of nodes to delete (tuify)
• Ockam - Improve ockam enroll ----help text by adding doc comment for identity flag (clap command)
• Ockam - Enroll "email: '+' character not allowed"

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

Updates from the Rust Project#

384 pull requests were merged in the last week

• formally demote tier 2 MIPS targets to tier 3

• add tvOS to target_os for register_dtor

• linker: remove -Zgcc-ld option

• linker: remove unstable legacy CLI linker flavors

• non_lifetime_binders: fix ICE in lint opaque-hidden-inferred-bound

• add async_fn_in_trait lint

• add a note to duplicate diagnostics

• always preserve DebugInfo in DeadStoreElimination

• bring back generic parameters for indices in rustc_abi and make it compile on stable

• coverage: allow each coverage statement to have multiple code regions

• detect missing => after match guard during parsing

• diagnostics: be more careful when suggesting struct fields

• don't suggest nonsense suggestions for unconstrained type vars in note_source_of_type_mismatch_constraint

• dont call mir.post_mono_checks in codegen

• emit feature gate warning for auto traits pre-expansion

• ensure that ~const trait bounds on associated functions are in const traits or impls

• extend impl's def_span to include its where clauses

• fix detecting references to packed unsized fields

• fix fast-path for try_eval_scalar_int

• fix to register analysis passes with -Zllvm-plugins at link-time

• for a single impl candidate, try to unify it with error trait ref

• generalize small dominators optimization

• improve the suggestion of generic_bound_failure

• make FnDef 1-ZST in LLVM debuginfo

• more accurately point to where default return type should go

• move subtyper below reveal_all and change reveal_all

• only trigger refining_impl_trait lint on reachable traits

• point to full async fn for future

• print normalized ty

• properly export function defined in test which uses global_asm!()

• remove Key impls for types that involve an AllocId

• remove is global hack

• remove the TypedArena::alloc_from_iter specialization

• show more information when multiple impls apply

• suggest pin!() instead of Pin::new() when appropriate

• make subtyping explicit in MIR

• do not run optimizations on trivial MIR

• in smir find_crates returns Vec<Crate> instead of Option<Crate>

• add Span to various smir types

• miri-script: print which sysroot target we are building

• miri: auto-detect no_std where possible

• miri: continuation of #3054: enable spurious reads in TB

• miri: do not use host floats in simd_{ceil,floor,round,trunc}

• miri: ensure RET assignments do not get propagated on unwinding

• miri: implement llvm.x86.aesni.* intrinsics

• miri: refactor dlsym: dispatch symbols via the normal shim mechanism

• miri: support getentropy on macOS as a foreign item

• miri: tree Borrows: do not create new tags as 'Active'

• add missing inline attributes to Duration trait impls

• stabilize Option::as_(mut_)slice

• reuse existing Somes in Option::(x)or

• fix generic bound of str::SplitInclusive's DoubleEndedIterator impl

• cargo: refactor(toml): Make manifest file layout more consitent

• cargo: add new package cache lock modes

• cargo: add unsupported short suggestion for --out-dir flag

• cargo: crates-io: add doc comment for NewCrate struct

• cargo: feat: add Edition2024

• cargo: prep for automating MSRV management

• cargo: set and verify all MSRVs in CI

• rustdoc-search: fix bug with multi-item impl trait

• rustdoc: rename issue-\d+.rs tests to have meaningful names (part 2)

• rustdoc: Show enum discrimant if it is a C-like variant

• rustfmt: adjust span derivation for const generics

• clippy: impl_trait_in_params now supports impls and traits

• clippy: into_iter_without_iter: walk up deref impl chain to find iter methods

• clippy: std_instead_of_core: avoid lint inside of proc-macro

• clippy: avoid invoking ignored_unit_patterns in macro definition

• clippy: fix items_after_test_module for non root modules, add applicable suggestion

• clippy: fix ICE in redundant_locals

• clippy: fix: avoid changing drop order

• clippy: improve redundant_locals help message

• rust-analyzer: add config option to use rust-analyzer specific target dir

• rust-analyzer: add configuration for the default action of the status bar click action in VSCode

• rust-analyzer: do flyimport completions by prefix search for short paths

• rust-analyzer: add assist for applying De Morgan's law to Iterator::all and Iterator::any

• rust-analyzer: add backtick to surrounding and auto-closing pairs

• rust-analyzer: implement tuple return type to tuple struct assist

• rust-analyzer: ensure rustfmt runs when configured with ./

• rust-analyzer: fix path syntax produced by the into_to_qualified_from assist

• rust-analyzer: recognize custom main function as binary entrypoint for runnables

Upcoming Events#

Rusty Events between 2023-10-11 - 2023-11-08 🦀

Virtual#

• 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 (Cardiff, UK)| Rust and C++ Cardiff
  • Operating System Primitives (Atomics & Locks Chapter 8)
• 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
• 2023-10-24 | Virtual (Washington, DC, US) | Rust DC
  • Month-end Rusting—Fun with 🍌 and 🔎!
• 2023-10-31 | Virtual (Dallas, TX, US) | Dallas Rust
  • Last Tuesday
• 2023-11-01 | Virtual (Indianapolis, IN, US) | Indy Rust

  • Indy.rs - with Social Distancing

Asia#

• 2023-10-11 | Kuala Lumpur, MY | GoLang Malaysia
  • Rust Meetup Malaysia October 2023 | Event updates Telegram | Event group chat
• 2023-10-18 | Tokyo, JP | Tokyo Rust Meetup

  • Rust and the Age of High-Integrity Languages

Europe#

• 2023-10-11 | Brussels, BE | BeCode Brussels Meetup
  • Rust on Web - EuroRust Conference
• 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
• 2023-10-19 | Amsterdam, NL | Rust Developers Amsterdam Group
  • Rust Amsterdam Meetup @ Terraform
• 2023-10-19 | Wrocław, PL | Rust Wrocław
  • Rust Meetup #35
• 2023-09-19 | Virtual (Washington, DC, US) | Rust DC
  • Month-end Rusting—Fun with 🍌 and 🔎!
• 2023-10-25 | Dublin, IE | Rust Dublin
  • Biome, web development tooling with Rust
• 2023-10-26 | Leipzig, DE | Rust - Modern Systems Programming in Leipzig
  • Leipzig Rust Meetup #3
• 2023-10-26 | Delft, NL | Rust Nederland
  • Rust at TU Delft
• 2023-11-07 | Brussels, BE | Rust Aarhus

  • Rust Aarhus - Rust and Talk beginners edition

North America#

• 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
• 2023-10-13 | Cambridge, MA, US | Boston Rust Meetup
  • Kendall Rust Lunch
• 2023-10-17 | San Francisco, CA, US | San Francisco Rust Study Group
  • Rust Hacking in Person
• 2023-10-18 | Brookline, MA, US | Boston Rust Meetup
  • Boston University Rust Lunch
• 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 Goes Where It Pleases Pt2 - Rust on the front end!
• 2023-10-19 | Seattle, WA, US | Seattle Rust User Group
  • Seattle Rust User Group - October Meetup
• 2023-10-25 | Austin, TX, US | Rust ATX
  • Rust Lunch - Fareground
• 2023-10-25 | Chicago, IL, US | Deep Dish Rust

  • Rust Happy Hour

Oceania#

• 2023-10-17 | Christchurch, NZ | Christchurch Rust Meetup Group
  • Christchurch Rust meetup meeting
• 2023-10-26 | Brisbane, QLD, AU | Rust Brisbane
  • October 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 Rust mission -- let you write software that's fast and correct, productively -- has never been more alive. So next Rustconf, I plan to celebrate:

• All the buffer overflows I didn't create, thanks to Rust
• All the unit tests I didn't have to write, thanks to its type system
• All the null checks I didn't have to write thanks to Option and Result
• All the JS I didn't have to write thanks to WebAssembly
• All the impossible states I didn't have to assert "This can never actually happen"
• All the JSON field keys I didn't have to manually type in thanks to Serde
• All the missing SQL column bugs I caught at compiletime thanks to Diesel
• All the race conditions I never had to worry about thanks to the borrow checker
• All the connections I can accept concurrently thanks to Tokio
• All the formatting comments I didn't have to leave on PRs thanks to Rustfmt
• All the performance footguns I didn't create thanks to Clippy

– Adam Chalmers in their RustConf 2023 recap

Thanks to robin 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.

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Discuss on r/rust