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? Tweet us at @ThisWeekInRust or send us a pull request. Want to get involved? We love contributions.

This Week in Rust is openly developed on GitHub. If you find any errors in this week's issue, please submit a PR.

Updates from Rust Community

Official

• Announcing Rust 1.57.0

Foundation

• Love for Rust at re:Invent

Project/Tooling Updates

• Updates in IntelliJ Rust for 2021.3
• Rust Analyzer Changelog #106
• cloud-hypervisor v20.0
• SixtyFPS (GUI crate): Changelog for 5th of December 2021
• This Month in Rust OSDev (November 2021)
• GCC Rust Monthly Report #12 November 2021
• rustc_codegen_gcc: Progress Report #6
• Arti 0.0.2 is released: API groundwork, refactoring, config, and optimism
• Rust takes a major step forward as Linux's second official language
• Updated Rust Code For Linux Kernel Patches Posted
• xmake v2.6.1 released, Switch to Lua5.4 runtime, Support Rust and Cplusplus mixed compilation
• Announcing Sycamore v0.7.0: Client-side hydration + Builder API
• Nushell 0.41
• [DE] WebAssembly: Wasmer 2.1 ermöglicht das Ausführen von Rust-Projekten im Browser
• [DE] Programmiersprache: Rust 1.57 – Don't Panic!

Observations/Thoughts

• Uninit read/write
• Portable and interoperable async Rust
• Speedrunning GUI development in Rust
• My Cryptography Final Project
• Case study: Rust programming language community
• Linear Types Can Help
• [video] On Hubris and Humility: developing an OS for robustness in Rust text version

Rust Walkthroughs

• How to encrypt a file in Rust (Using streaming AEAD encryption)
• Getting Started with Rust on a Raspberry Pi Pico (Part 3)
• A better cargo-readme - Issue 0: Humble Beginning
• How to Overriding (Patch) Cargo Dependencies
• Higher Kinded Types in Rust
• Node to Rust: Day 1 - From nvm to rustup
• Creating a Web Page with Actix-Web (Rust)
• [video] rg3d - live game development #2
• [video] 1Password Developer Fireside Chat: Ownership & Mutability Patterns in Rust
• [video] [series] Advent of Code in Rust by Lucille Blumire
• [video] [series] Solving Advent of Code 2021 in Rust by Yoshua Wuyts
• [video] [series] Writing a Programming Language (in Rust) 9: Implementing Value References

Miscellaneous

• Live Coder Jon Gjengset Gets into the Nitty-Gritty of Rust
• AWS SDK for Rust (Developer Preview)
• [BR-pt] Esta Semana em Rust #419

Crate of the Week

This week's crate is tap, a library with extension traits to provide suffix-position pipeline behavior.

Thanks to David Mason for the suggestion!

Please submit your suggestions and votes for next week!

Call for Participation

Always wanted to contribute to open-source projects but didn't 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.

Updates from the Rust Project

286 pull requests were merged in the last week

• Optimize rustc_lexer
• Add support for LLVM coverage mapping format versions 5 and 6
• Add support for riscv64gc-unknown-freebsd
• Fix ICE in check_must_not_suspend_ty()
• Fix ICE when yielding in function returning impl Trait
• Don't suggest types whose inner type is erroneous
• Only show notable traits if both types are the same
• Improve diagnostic for missing half of binary operator in if condition
• Improve error message for E0659 if the source is not available
• Improve error message for incorrect field accesses through raw pointers
• Add Option::inspect and Result::{inspect, inspect_err}
• Add a try_reduce method to the Iterator trait
• Add slice take methods
• Make array::{try_from_fn, try_map} and Iterator::try_find generic over Try
• Introduce RawVec::reserve_for_push
• Implement VecDeque::retain_mut
• libc: Define max_align_t for wasi
• portable-simd: Generic core::ops for Simd<T, _>
• cargo: Stabilize future-incompat-report
• cargo: Support abbreviating --release as -r
• clippy: Consider NonNull as a pointer type
• clippy: Escape backslash in single_char_pattern.rs
• clippy: Fix any() not taking reference in search_is_some lint
• clippy: Fix some false negatives for single_char_pattern
• clippy: Parenthesize blocks in needless_bool suggestion
• clippy: Upgrade map_flatten to complexity
• rustfmt: Determine when new comment lines are needed for itemized blocks

Rust Compiler Performance Triage

A week of mostly rather small changes with many regressions being hard to diagnose. The largest regression comes from the introduction of a new future (desugaring .await into a call to IntoFuture::into_future). This was deemed acceptable as it only seems to have a negative impact in stress test situations where async/await is used more than one would normally expect. Unfortunately this does mean regressions beat out improvements this week.

Triage done by @rylev. Revision range: 1c0287..ecb65b

3 Regressions, 5 Improvements, 5 Mixed; 3 of them in rollups 31 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:

• Static async fn in traits

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.

RFCs

• No RFCs entered final comment period this week.

Tracking Issues & PRs

• [disposition: merge] Relax priv-in-pub lint on generic bounds and where clauses of trait impls.

New RFCs

• RFC: Alignment niches for references types.

Upcoming Events

Rusty Events between 12/01-12/15 🦀

Online

• December 3, 2021 | New York City, NY, US | Getting started in aerospace with Rust 🦀 | NewSpace NYC.
• December 7, 2021 | Berlin, DE | Rust Hack and Learn | Berline.rs, a Berlin-local Rust community
• December 7, 2021 | Buffalo, NY, US | First Tuesdays: Buffalo Rust User Group | Buffalo Rust Meetup
• December 7, 2021 | South Padre Island, TX, US | Tuesdays - Book #24 - Rust for Rustaceans - Chapter 1 | Los Gatos Reading Group (South Padre Island)
• December 8, 2021 | Los Angeles, CA, US | Introduction to Photogrammetry with Geordon Worley [Virtual] Dec. 2021 | Rust Los Angeles
• December 8, 2021 | Los Angeles, CA, US | Rust Computer Vision Project with Geordon Worley | Rust Los Angeles
• December 8, 2021 | Stuttgart, DE | Rust-Meetup | Rust Community Stuttgart
• December 9, 2021 | Columbus, OH, US | Second Thursdays: Monthly Meetup | Columbus Rust Society
• December 9, 2021 | London, UK | Rust London x TrueLayer Takeover & Christmas Party | Rust London User Group
• December 9, 2021 | Oslo, NO | Rust Oslo @ Rebel w/Carol (Nichols || Goulding)| Rust Oslo
• December 9, 2021 | San Diego, CA, US | San Diego Rust December 2021 Tele-Meetup | San Diego Rust
• December 10, 2021 | Chicago, IL, US | 8LU Keynote by Eric Smith - Write Your Game in Rust! | 8th Light University
• December 11, 2021 | Nairobi, KE | Rust Catchup 2021 | Rust Nairobi
• December 13, 2021 | Eugene, OR, US | Mondays - Book-Club - Rust Programming Language | Functional Programming - Eugene
• December 14, 2021 | South Padre Island, TX, US | Tuesdays - Book #24 - Rust for Rustaceans - Chapter 1 (session 2) | Los Gatos Reading Group (South Padre Island)
• December 14, 2021 | Seattle, WA, US | Monthly Meetup | Seattle Rust Meetup

North America

• December 14, 2021 | Minneapolis, MN, US | First Meetup | Minneapolis Rust Meetup Group
• December 14, 2021 | New York, NY, US | Presentation by Chelsea E. Manning: Rust on Arduino-style microcontrollers | Rust NYC

Europe

• December 3, 2021 | Moscow, RU | Rust Con | RustCon.ru
• December 9, 2021 | London, UK | Rust London x TrueLayer Takeover & Christmas Party | Rust London User Group

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.

Rust Jobs

DeepSource

• Software Engineer, Static Analysis - Rust (Bangalore, India)

Clear

• Full Stack Developer (Remote)

Pixy

• Rust Developer Position

Bionaut Labs

• Embedded Software Engineer (Senior) (Los Angeles, CA, US)
• Embedded Software Engineer (Junior) (Los Angeles, CA, US)

Metawork

• Infrastructure Engineer (Remote US)
• Platform Engineer (Remote US)

Tweet us at @ThisWeekInRust to get your job offers listed here!

Quote of the Week

v2 of the patch-series "to add support for Rust as a second language to the Linux kernel" was posted to LKML [..]

There have been several improvements to the overall Rust support since RFC and v2 described in the linked mail.

– Thorsten Leemhuis on twitter

llogiq unanimously suggested and voted that this be our quote for this week.

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.

Email list hosting is sponsored by The Rust Foundation

Discuss on r/rust