#zürisee | Explore Tumblr Posts and Blogs

this-week-in-rust · 1 month

Text

This Week in Rust 539

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

Newsletters

The Embedded Rustacean Issue #15

This Week in Bevy: Foundations, Meetups, and more Bevy Cheatbook updates

Project/Tooling Updates

rustc_codegen_gcc: Progress Report #31

Slint 1.5: Embracing Android, Improving Live-Preview, and introducing Pythonic Slint

yaml-rust2's first real release

testresult 0.4.0 released. The crate provides the TestResult type for concise and precise test failures.

Revolutionizing PostgreSQL Database Comparison: Introducing pgdatadiff in Rust — Unleash Speed, Safety, and Scalability

Observations/Thoughts

SemVer in Rust: Breakage, Tooling, and Edge Cases — FOSDEM 2024 annotated talk

Go's Errors: How I Learned to Love Rust

Strongly-typed IDs in SurrealDB

Iterators and traversables

Using PostHog with Rust

Using Rust on ESP32 from Windows

Compiling Rust to WASI

Achieving awful compression with digits of pi

Zig, Rust, and other languages

What part of Rust compilation is the bottleneck?

Lambda on hard mode: Inside Modal's web infrastructure

Embedded Rust Bluetooth on ESP: BLE Advertiser

[video] Diplomat - Idiomatic Multi-Language APIs - Robert Bastian - Rust Zürisee March 2024

Rust Walkthroughs

A Short Introduction to Rust and the Bevy Game Engine

[video] Strings and memory reallocation in Rust

Research

Rust Tools Survey (by JetBrains)

Miscellaneous

RustNL 2024 schedule announced

Fighting back: Turning the Tables on Web Scrapers Using Rust

The book "Code Like a Pro in Rust" is released

Red Hat's Long, Rust'ed Road Ahead For Nova As Nouveau Driver Successor

Crate of the Week

This week's crate is heck, a no_std crate to perform case conversions.

Thanks to Edoardo Morandi for the suggestion!

Please submit your suggestions and votes for next week!

Call for Testing

An important step for RFC implementation is for people to experiment with the implementation and give feedback, especially before stabilization. The following RFCs would benefit from user testing before moving forward:

No calls for testing were issued this week.

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.

Rama — add Form support (IntroResponse + FromRequest)

Rama — rename *Filter matchers to *Matcher

Rama — Provide support for boxed custom matchers in layer enums

Rama — use workspace dependencies for common workspace dep versionning

Rama — add open-telemetry middleware and extended prometheus support

Space Acres - Packaging for MacOS

Space Acres - Implement Loading Progress

Space Acres - Show more lines of logs when the app is "Stopped with error"

Space Acres - Tray Icon Support

Hyperswitch - [REFACTOR]: Remove Default Case Handling - Braintree

Hyperswitch - [REFACTOR]: Remove Default Case Handling - Fiserv

Hyperswitch - [REFACTOR]: Remove Default Case Handling - Globepay

ZeroCopy - Fix cfgs in rustdoc

ZeroCopy - Audit uses of "C-like" and prefer "fieldless"

ZeroCopy - in zerocopy-derive UI tests, detect whether we're building with RUSTFLAGS='-Wwarnings'

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

CFP - Speakers

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 submission website through a PR to TWiR.

Updates from the Rust Project

498 pull requests were merged in the last week

BOLT Use CDSort and CDSplit

NormalizesTo: return nested goals to caller

add_retag: ensure box-to-raw-ptr casts are preserved for Miri

f16 and f128 step 3: compiler support & feature gate

add -Z external-clangrt

add wasm_c_abi future-incompat lint

add missing try_visit calls in visitors

check library crates for all tier 1 targets in PR CI

copy byval argument to alloca if alignment is insufficient

coverage: initial support for branch coverage instrumentation

create some minimal HIR for associated opaque types

delay expand macro bang when there has indeterminate path

delegation: fix ICE on duplicated associative items

detect allocator for box in must_not_suspend lint

detect calls to .clone() on T: !Clone types on borrowck errors

detect when move of !Copy value occurs within loop and should likely not be cloned

diagnostics: suggest Clone bounds when noop clone()

do not eat nested expressions' results in MayContainYieldPoint format args visitor

don't create ParamCandidate when obligation contains errors

don't ICE when non-self part of trait goal is constrained in new solver

don't show suggestion if slice pattern is not top-level

downgrade const eval dangling ptr in final to future incompat lint

enable PR tracking review assignment for rust-lang/rust

enable creating backtraces via -Ztreat-err-as-bug when stashing errors

enable frame pointers for the standard library

ensure RPITITs are created before def-id freezing

fix 32-bit overflows in LLVM composite constants

fix ICE in diagnostics for parenthesized type arguments

fix long-linker-command-lines failure caused by rust.rpath=false

fix attribute validation on associated items in traits

fix stack overflow with recursive associated types

interpret: ensure that Place is never used for a different frame

make incremental sessions identity no longer depend on the crate names provided by source code

match lowering: don't collect test alternatives ahead of time

more eagerly instantiate binders

never patterns: suggest ! patterns on non-exhaustive matches

only generate a ptrtoint in AtomicPtr codegen when absolutely necessary

only invoke decorate if the diag can eventually be emitted

pass the correct DefId when suggesting writing the aliased Self type out

pattern analysis: Store field indices in DeconstructedPat to avoid virtual wildcards

provide structured suggestion for #![feature(foo)]

reject overly generic assoc const binding types

represent Result<usize, Box<T>> as ScalarPair(i64, ptr)

split refining_impl_trait lint into _reachable, _internal variants

stabilize imported_main

stabilize associated type bounds (RFC #2289)

stop walking the bodies of statics for reachability, and evaluate them instead

ungate the UNKNOWN_OR_MALFORMED_DIAGNOSTIC_ATTRIBUTES lint

unix time module now return result

validate builder::PATH_REMAP

miri: add some chance to reuse addresses of previously freed allocations

avoid lowering code under dead SwitchInt targets

use UnsafeCell for fast constant thread locals

add CStr::bytes iterator

add as_(mut_)ptr and as_(mut_)slice to raw array pointers

implement {Div,Rem}Assign<NonZero<X>> on X

fix unsoundness in Step::forward_unchecked for signed integers

implement Duration::as_millis_{f64,f32}

optimize ptr::replace

safe Transmute: Require that source referent is smaller than destination

safe Transmute: Use 'not yet supported', not 'unspecified' in errors

hashbrown: fix index calculation in panic guard of clone_from_impl

cargo tree: Control --charset via auto-detecting config value

cargo toml: Flatten manifest parsing

cargo: add 'open-namespaces' feature

cargo fix: strip feature dep when dep is dev dep

cargo: prevent dashes in lib.name

cargo: expose source/spans to Manifest for emitting lints

rustdoc-search: depth limit T<U> → U unboxing

rustdoc-search: search types by higher-order functions

rustdoc: add --test-builder-wrapper arg to support wrappers such as RUSTC_WRAPPER when building doctests

rustdoc: do not preload fonts when browsing locally

rustfmt: fix: ICE with expanded code

rustfmt: initial work on formatting headers

clippy: cast_lossless: Suggest type alias instead of the aliased type

clippy: else_if_without_else: Fix duplicate diagnostics

clippy: map_entry: call the visitor on the local's else block

clippy: option_option: Fix duplicate diagnostics

clippy: unused_enumerate_index: trigger on method calls

clippy: use_self: Make it aware of lifetimes

clippy: don't emit doc_markdown lint for missing backticks if it's inside a quote

clippy: fix dbg_macro false negative when dbg is inside some complex macros

clippy: fix empty_docs trigger in proc-macro

clippy: fix span calculation for non-ascii in needless_return

clippy: handle false positive with map_clone lint

clippy: lint when calling the blanket Into impl from a From impl

clippy: move iter_nth to style, add machine applicable suggestion

clippy: move readonly_write_lock to perf

clippy: new restriction lint: integer_division_remainder_used

rust-analyzer: distinguish integration tests from crates in test explorer

rust-analyzer: apply #[cfg] to proc macro inputs

rust-analyzer: implement ATPIT

rust-analyzer: support macro calls in eager macros for IDE features

rust-analyzer: syntax highlighting improvements

rust-analyzer: fix panic with impl trait associated types in where clause

rust-analyzer: don't auto-close block comments in strings

rust-analyzer: fix wrong where clause rendering on hover

rust-analyzer: handle attributes when typing curly bracket

rust-analyzer: ignore some warnings if they originate from within macro expansions

rust-analyzer: incorrect handling of use and panic issue in extract_module

rust-analyzer: make inlay hint resolving work better for inlays targetting the same position

rust-analyzer: refactor extension to support arbitrary shell command runnables

rust-analyzer: show compilation progress in test explorer

rust-analyzer: use --workspace and --no-fail-fast in test explorer

Rust Compiler Performance Triage

Even though the summary might not look like it, this was actually a relatively quiet week, with a few small regressions. The large regression that is also shown in the summary table was caused by extending the verification of incremental compilation results. However, this verification is not actually fully enabled by default, so these regressions are mostly only visible in our benchmarking suite, which enables the verification to achieve more deterministic benchmarking results. One small regression was also caused by enabling frame pointers for the Rust standard library, which should improve profiling of Rust programs.

Triage done by @kobzol. Revision range: e919669d..21d94a3d

Summary:

(instructions:u) mean range count Regressions ❌ (primary) 2.5% [0.4%, 7.8%] 207 Regressions ❌ (secondary) 2.9% [0.2%, 8.3%] 128 Improvements ✅ (primary) - - 0 Improvements ✅ (secondary) -1.0% [-1.3%, -0.4%] 4 All ❌✅ (primary) 2.5% [0.4%, 7.8%] 207

4 Regressions, 1 Improvements, 6 Mixed; 4 of them in rollups 67 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.

RFCs

Reserve gen keyword in 2024 edition for Iterator generators

Tracking Issues & PRs

Rust

[disposition: merge] Tracking Issue for raw slice len() method (slice_ptr_len, const_slice_ptr_len)

[disposition: merge] downgrade ptr.is_aligned_to crate-private

[disposition: merge] Stabilize unchecked_{add,sub,mul}

[disposition: merge] transmute: caution against int2ptr transmutation

[disposition: merge] Normalize trait ref before orphan check & consider ty params in alias types to be uncovered

Cargo

[disposition: merge] release cargo test helper crate to crates-io

New and Updated RFCs

[new] Add support for use Trait::method

Upcoming Events

Rusty Events between 2024-03-20 - 2024-04-17 🦀

Virtual

2024-03-20 | Virtual (Cardiff, UK) | Rust and C++ Cardiff

Rust for Rustaceans Book Club: Chapter 3 - Designing Interfaces

2024-03-20 | Virtual (Vancouver, BC, CA) | Vancouver Rust

Rust Study/Hack/Hang-out

2024-03-21 | Virtual (Charlottesville, NC, US) | Charlottesville Rust Meetup

Crafting Interpreters in Rust Collaboratively

2024-03-26 | Virtual + In Person (Barcelona, ES) | BcnRust

13th BcnRust Meetup - Stream

2024-03-26 | Virtual (Dallas, TX, US) | Dallas Rust

Last Tuesday

2024-03-28 | Virtual + In Person (Berlin, DE) | OpenTechSchool Berlin + Rust Berlin

Rust Hack and Learn | Mirror: Rust Hack n Learn Meetup

2024-04-02 | Virtual (Buffalo, NY, US) | Buffalo Rust

Buffalo Rust User Group

2024-04-03 | Virtual (Cardiff, UK) | Rust and C++ Cardiff

Rust for Rustaceans Book Club: Chapter 4 - Error Handling

2024-04-03 | Virtual (Indianapolis, IN, US) | Indy Rust

Indy.rs - with Social Distancing

2024-04-04 | Virtual (Charlottesville, NC, US) | Charlottesville Rust Meetup

Crafting Interpreters in Rust Collaboratively

2024-04-09 | Virtual (Dallas, TX, US) | Dallas Rust

Second Tuesday

2024-04-11 | Virtual + In Person (Berlin, DE) | OpenTechSchool Berlin + Rust Berlin

Rust Hack and Learn | Mirror: Rust Hack n Learn Meetup

2024-04-11 | Virtual (Nürnberg, DE) | Rust Nüremberg

Rust Nürnberg online

2024-04-16 | Virtual (Washinigton, DC, US) | Rust DC

Mid-month Rustful

2024-04-17| Virtual (Vancouver, BC, CA) | Vancouver Rust

Rust Study/Hack/Hang-out

Africa

2024-04-05 | Kampala, UG | Rust Circle Kampala

Rust Circle Meetup

Asia

2024-03-30 | New Delhi, IN | Rust Delhi

Rust Delhi Meetup #6

Europe

2024-03-20 | Girona, ES | Rust Girona

Introduction to programming Microcontrollers with Rust

2024-03-20 | Lyon, FR | Rust Lyon

Rust Lyon Meetup #9

2024-03-20 | Oxford, UK | Oxford Rust Meetup Group

Introduction to Rust

2024-03-21 | Augsburg, DE | Rust Meetup Augsburg

Augsburg Rust Meetup #6

2024-03-21 | Lille, FR | Rust Lille

Rust Lille #6: Du RSS et de L'ECS !

2024-03-21 | Vienna, AT | Rust Vienna

Rust Vienna Meetup - March - Unsafe Rust

2024-03-23 | Stockholm, SE | Stockholm Rust

Ferris' Fika Forum | Map

2024-03-25 | London, UK | Rust London User Group

LDN Talks: Rust Nation 2024 Pre-Conference Meetup

2024-03-26 | Barcelona, ES + Virtual | BcnRust

13th BcnRust Meetup

2024-03-26 - 2024-03-28 | London, UK | Rust Nation UK

Rust Nation 2024 - Conference

2024-03-28 | Berlin, DE | Rust Berlin

Rust and Tell

2024-04-10 | Cambridge, UK | Cambridge Rust Meetup

Rust Meetup Reboot 3

2024-04-10 | Oslo, NO | Rust Oslo

Rust Hack'n'Learn at Kampen Bistro

2024-04-11 | Bordeaux, FR | Rust Bordeaux

Rust Bordeaux #2 : Présentations

2024-04-11 | Reading, UK | Reading Rust Workshop

Reading Rust Meetup at Browns

2024-04-16 | Bratislava, SK | Bratislava Rust Meetup Group

Rust Meetup by Sonalake #5

2024-04-16 | Munich, DE + Virtual | Rust Munich

Rust Munich 2024 / 1 - hybrid

North America

2024-03-21 | Mountain View, CA, US | Mountain View Rust Meetup

Rust Meetup at Hacker Dojo

2024-03-21 | Nashville, TN, US | Music City Rust Developers

Rust Meetup : Lightning Round!

2024-03-21 | Seattle, WA, US | Seattle Rust User Group

Seattle Rust User Group Meetup

2024-03-21 | Spokane, WA, US | Spokane Rust Meetup | Spokane Rust Website

Presentation: Brilliance in Borrowing

2024-03-22 | Somerville, MA, US | Boston Rust Meetup

Somerville Union Square Rust Lunch, Mar 22

2024-03-26 | Minneapolis, MN, US | Minneapolis Rust Meetup

Minneapolis Rust: Getting started with Rust!

2024-03-27 | Austin, TX, US | Rust ATX

Rust Lunch - Fareground

2024-03-27 | Hawthorne (Los Angeles), CA, US | Freeform

Rust in the Physical World 🦀 Tech Talk Event at Freeform

2024-03-31 | Boston, MA, US | Boston Rust Meetup

Beacon Hill Rust Lunch, Mar 31

2024-04-04 | Mountain View, CA, US | Mountain View Rust Meetup

Rust Meetup at Hacker Dojo

2024-04-11 | Seattle, WA, US | Seattle Rust User Group

Seattle Rust User Group Meetup

2024-04-16 | San Francisco, CA, US | San Francisco Rust Study Group

Rust Hacking in Person

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

In 10 years we went from “Rust will never replace C and C++” to “New C/C++ should not be written anymore, and you should use Rust”. Good job.

– dpc_pw on lobste.rs

Thanks to Dennis Luxen 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

#rust-lang #rust #rustlang #twir #long post

1 note · View note

this-week-in-rust · 2 months

Text

This Week in Rust 538

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 Rustup 1.27.0

crates.io: Download changes

Newsletters

This Month in Rust OSDev: February 2024

Project/Tooling Updates

Bevy Foundation

Rust Flashcards - 557 cards to learn Rust from first principles

Lib.rs website improvements

Sudo-rs dependencies: when less is better

rust-analyzer changelog #224

biscotti, a new crate for HTTP cookies

Boa release v0.18

Announcing Relm4 0.7 and 0.8

Meilisearch 1.7 — New OpenAI models & GPU support for Hugging Face embeddings

Cargo wizard: automate Cargo project configuration

GreptimeDB v0.7 is ready for cloud-native monitoring

[video] Project Syn - Simon Gerber - Rust Zürisee March 2024

Observations/Thoughts

Fast Development In Rust, Part One

Mental model for unsafe (complete rewrite)

10 years in Open Source

[audio] Season Finale - Rust in Production Podcast

[video] SemVer in Rust: Breakage, Tooling, and Edge Cases

Rust Walkthroughs

How to Use Rust Procedural Macros to Replace Panic with syn’s Fold

Rust Iterators Beyond the Basics - part 1

Rust Multi-crate project in a monorepo

Using Stripe Payments with Rust

Problems around modelling an asynchronous API for database transaction in Rust

Embedded Rust Bluetooth on ESP: BLE Scanner

[video] Implementing (parts of) git from scratch in Rust

[video] The Billion Rows Challenge in Rust - an intro to Rust for data engineering

Miscellaneous

Rust impact on engineering management

From medical doctor to rust developer

February 2024 Rust Jobs Report

Crate of the Week

This week's crate is biscotti, an opinionated library to deal with HTTP cookies on the server side.

We saw a lamentable lack of suggestions this week. Nevertheless, llogiq is pleased with his selection.

Please submit your suggestions and votes for next week!

Call for Testing

Tracking Issue for min_exhaustive_patterns

Testing Steps

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.

Hyperswitch - [REFACTOR]: Remove Default Case Handling - Bambora

Hyperswitch - [REFACTOR]: Remove Default Case Handling - Mollie

Hyperswitch - [REFACTOR]: Remove Default Case Handling - Braintree

GreptimeDB - Painless integrating with Grafana via Prometheus plugin

GreptimeDB - Add strict mode to validate protocol strings

Fluvio - fvm switch fails on some systems with running local cluster

Fluvio - Add new command fluvio cluster resume

quinn - Add CI for mobile platforms (iOS & Android)

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

CFP - Speakers

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. They are ordered below by when the CFP closes.

RustFest Zürich 2024 | Closes 2024-03-31 | Zürich, Switzerland | Event date: 2024-06-19 - 2024-06-24

Oxidize 2024 | Closes 2024-03-24 | Berlin, Germany | Event date: 2024-05-28 - 2024-05-30

RustConf 2024 | Closes 2024-04-25 | Montreal, Canada | Event date: 2024-09-10

EuroRust 2024| Closes 2024-06-03 | Vienna, Austria & online | Event on 2024-10-10

Scientific Computing in Rust 2024| Closes 2024-06-14 | online | Event date: 2024-07-17 - 2024-07-19

If you are an event organizer hoping to expand the reach of your event, please submit a link to the submission website through a PR to TWiR.

Updates from the Rust Project

506 pull requests were merged in the last week

add new Tier-3 target: loongarch64-unknown-linux-musl

add arm64ec-pc-windows-msvc target

LLVM Bitcode Linker: A self contained linker for nvptx and other targets

AST validation: Improve handling of inherent impls nested within functions and anon consts

const_eval_select: make it safe but be careful with what we expose on stable for now

hir_analysis: enums return None in find_field

add a description field to target definitions

add an option to have an external download/bootstrap cache

add asm goto support to asm!

add metadata to targets

add proper cfgs for struct HirIdValidator used only with debug-assert

add the new description field to Target::to_json, and add descriptions for some MSVC targets

allow codegen backends to opt-out of parallel codegen

allow multiple impl Into<{D,Subd}iagMessage> parameters in a function

allow targets to override default codegen backend

apply EarlyBinder only to TraitRef in ImplTraitHeader

avoid invoking the intrinsic query for DefKinds other than Fn or AssocFn

avoid overlapping privacy suggestion for single nested imports

change some attributes to only_local

check that return type is WF in typeck

detect unused struct impls pub trait

diagnostics: do not suggest using #[unix_sigpipe] without a value

distinguish between library and lang UB in assert_unsafe_precondition

do not try to format removed files

don't ICE if we collect no RPITITs unless there are no unification errors

don't ICE in CTFE if raw/fn-ptr types differ

don't pass a break scope to Builder::break_for_else

don't require specifying unrelated assoc types when trait alias is in dyn type

dynamically size sigaltstk in std

errors: share SilentEmitter between rustc and rustfmt

fix crash in internal late lint checking

fix legacy numeric constant diag items

fix linting paths with qself in unused_qualifications

fix metadata for dyn-star in new solver

fix misaligned loads when loading UEFI arg pointers

fix redundant import errors for preload extern crate

fix type resolution of associated const equality bounds (take 2)

fix: localWaker memory leak and some stability attributes

implement async closure signature deduction

improve diagnostics for parenthesized type arguments

interpret: do not call machine read hooks during validation

limit the number of names and values in check-cfg diagnostics

lint singleton gaps after exclusive ranges

loongarch: add frecipe and relax target feature

lower transmutes from int to pointer type as gep on null

make TAITs and ATPITs capture late-bound lifetimes in scope

make DefiningAnchor::Bind only store the opaque types that may be constrained, instead of the current infcx root item

make std::os::unix::ucred module private

make not finding core a fatal error

make the lowering of thir::ExprKind::If easier to follow

match lowering: define a convenient struct

only compare ambiguity item that have hard error

only set noalias on Box with the global allocator

record mtime in bootstrap's LLVM linker script

refactor pre-getopts command line argument handling

refer to "slice" instead of "vector" in Ord and PartialOrd trait impl of slices

remove feed_local_def_id

removing absolute path in proc-macro

rework untranslatable_diagnostic lint

run a single huge par_body_owners instead of many small ones after each other

silence mismatched types errors for implied projections

stabilize the #[diagnostic] namespace and #[diagnostic::on_unimplemented] attribute

std support for wasm32 panic=unwind

store backtrace for must_produce_diag

temporarily make allow-by-default the non_local_definitions lint

tweak the way we protect in-place function arguments in interpreters

uplift some feeding out of associated_type_for_impl_trait_in_impl and into queries

use GEP inbounds for ZST and DST field offsets

use ptradd for vtable indexing

MIR printing: print the path of uneval'd const

miri: do not apply aliasing restrictions to Box with custom allocator

miri: remove the ability to disable ABI checking

perf: build rustc with 1CGU on x86_64-apple-darwin and x86_64-pc-windows-msvc

replace the default branch with an unreachable branch If it is the last variant

optimize write with as_const_str for shorter code

fix quadratic behavior of repeated vectored writes

net: don't use checked arithmetic when parsing numbers with known max digits

align_offset, align_to: no longer allow implementations to spuriously fail to align

impl From<TryReserveError> for io::Error

make impl<Fd: AsFd> impl take ?Sized

add Read impl for &Stdin

std::rand: enable getrandom for dragonflybsd too

std::threads: revisit stack address calculation on netbsd

win10: use GetSystemTimePreciseAsFileTime directly

windows: implement condvar, mutex and rwlock using futex

add slice::try_range

implement MaybeUninit::fill{,_with,_from}

RawVec::into_box: avoid unnecessary intermediate reference

Vec::try_with_capacity

add #[inline] to BTreeMap::new constructor

add std::ffi::c_str module

futures: add a helper for always ready futures

cargo: cli: allow logging to chrome traces

cargo: doc: collapse down generated statuses without --verbose

cargo: log: trace parameters to align with profile

cargo: lockfile: make diffing/printing more reusable

cargo: consistently compare MSRVs

rustfmt: fix failure with => in comment after match =>

clippy: new lints: duplicated_attributes, manual_unwrap_or_default, nonminimal_bool, zero_repeat_side_effects and const_is_empty

clippy: fix duplicate diagnostics in manual_retain, mut_mut, no_effect_replace and single_match

clippy: don't lint redundant_field_names across macro boundaries

clippy: fix std_instead_of_core false positive

clippy: fix missing_docs_in_private_items on some proc macros

clippy: have more lints respect #[allow] on exprs

rust-analyzer: add QuickFix for unresolved field

rust-analyzer: add fix for unused_variables

rust-analyzer: add proc macro semantic token type

rust-analyzer: add config and capability for test explorer

rust-analyzer: don't escape \ and $ in "Extract format expressions" assist

rust-analyzer: don't force draw a dependency edge to the real_span_map query

rust-analyzer: don't invalid body query results when generating desugared names

rust-analyzer: fix method resolution snapshotting receiver_ty too early

rust-analyzer: function argument type inference with associated type impl trait

rust-analyzer: keep attributes in assist 'generate_delegate_trait'

rust-analyzer: panic when using float numbers without dots in chain calls

rust-analyzer: preserve $ and \ in postfix format completions

rust-analyzer: remove accidental dependency between parse_macro_expansion and parse

rust-analyzer: skip match diagnostics for partially unknown types

rust-analyzer: for toolchain binaries use the full path found in $PATH

rust-analyzer: stop eagerly resolving inlay hint text edits for VSCode

Rust Compiler Performance Triage

A mixed week, with a vast number of improvements (in large part due to PR

122010, which undoes a prior regression; PR #120985, a host LLVM update).

But also three admittedly small-ish regressions which seemed unanticipated and were still large enough that I did not feel comfortable rubber-stamping them with a perf-regression-triaged marking.

Triage done by @pnkfelix. Revision range: 41d97c8a..e919669d

2 Regressions, 5 Improvements, 9 Mixed; 5 of them in rollups 54 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:

RFC: Packages as (optional) namespaces

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

Rust

[disposition: merge] Normalize trait ref before orphan check & consider ty params in alias types to be uncovered

[disposition: merge] Split refining_impl_trait lint into _reachable, _internal variants

[disposition: merge] debuginfo: Stabilize -Z debug-macros, -Z collapse-macro-debuginfo and #[collapse_debuginfo]

[disposition: merge] Stabilize associated type bounds (RFC 2289)

[disposition: merge] c_unwind full stabilization request: change in extern "C" behavior

[disposition: postpone] Consider linting against 00B7 aka interpunct aka middle dot

[disposition: merge] Prevent opaque types being instantiated twice with different regions within the same function

[disposition: merge] instantiate higher ranked goals outside of candidate selection

[disposition: merge] Add wasm_c_abi future-incompat lint

[disposition: merge] stabilize ptr.is_aligned, move ptr.is_aligned_to to a new feature gate

[disposition: merge] feat: implement {Div,Rem}Assign<NonZero<X>> on X

Cargo

[disposition: merge] cargo: prevent dashes in lib.name

New and Updated RFCs

[new] Make cargo install respect lockfiles by default

Upcoming Events

Rusty Events between 2024-03-13 - 2024-04-10 🦀

Virtual

2024-03-14 | Virtual (Berlin, DE) | OpenTechSchool Berlin

Web Frontend Co-Learning (online)

2024-03-14 | Virtual (Berlin, DE) | OpenTechSchool Berlin + Rust Berlin

Rust Hack and Learn | Mirror: Rust Hack n Learn Meetup | Mirror: Berline.rs page

2024-03-14 | Virtual (Nürnberg, DE) | Rust Nüremberg

Rust Nürnberg online

2024-03-14 | Virtual (San Diego, CA, US) | San Diego Rust

San Diego Rust March 2024 Tele-Meetup

2024-03-19 | Virtual | Formal Land

Rust for Lunch: Formal verification for Rust with coq-of-rust. Speaker: Guillaume Claret | Docs

2024-03-19 | Virtual (Washinigton, DC, US) | Rust DC

Mid-month Rustful

2024-03-20 | Virtual (Cardiff, UK) | Rust and C++ Cardiff

Rust for Rustaceans Book Club: Chapter 3 - Designing Interfaces

2024-03-20 | Virtual (Vancouver, BC, CA)| Vancouver Rust

Rust Study/Hack/Hang-out

2024-03-21 | Virtual (Charlottesville, NC, US) | Charlottesville Rust Meetup

Crafting Interpreters in Rust Collaboratively

2024-03-26 | Virtual + In Person (Barcelona, ES) | BcnRust

13th BcnRust Meetup - Stream

2024-03-26 | Virtual (Dallas, TX, US) | Dallas Rust

Last Tuesday

2024-03-28 | Virtual + In Person (Berlin, DE) | OpenTechSchool Berlin + Rust Berlin

Rust Hack and Learn | Mirror: Rust Hack n Learn Meetup

2024-04-02 | Virtual (Buffalo, NY, US) | Buffalo Rust

Buffalo Rust User Group

2024-04-03 | Virtual (Cardiff, UK) | Rust and C++ Cardiff

Rust for Rustaceans Book Club: Chapter 4 - Error Handling

2024-04-03 | Virtual (Indianapolis, IN, US) | Indy Rust

Indy.rs - with Social Distancing

2024-04-09 | Virtual (Dallas, TX, US) | Dallas Rust

Second Tuesday

Africa

2024-04-05 | Kampala, UG | Rust Circle Kampala

Rust Circle Meetup

Asia

2024-03-30 | New Delhi, IN | Rust Delhi

Rust Delhi Meetup #6

Europe

2024-03-13 | Paris, FR | Paris Rustaceans

Rust Meetup in Paris

2024-03-14 | Reading, UK | Reading Rust Workshop

Reading Rust Meetup at Browns

2024-03-19 | Aarhus, DK | Rust Aarhus

Hack Night

2024-03-19 | Leipzig, DE | Rust - Modern Systems Programming in Leipzig

Rust Interactive Session

2024-03-19 | Prague, CZ | Rust Prague

Rust Meetup @ Charles University

2024-03-20 | Girona, ES | Rust Girona

Introduction to programming Microcontrollers with Rust

2024-03-20 | Lyon, FR | Rust Lyon

Rust Lyon Meetup #9

2024-03-21 | Augsburg, DE | Rust Meetup Augsburg

Augsburg Rust Meetup #6

2024-03-21 | Lille, FR | Rust Lille

Rust Lille #6: Du RSS et de L'ECS !

2024-03-21 | Vienna, AT | Rust Vienna

Rust Vienna Meetup - March - Unsafe Rust

2024-03-23 | Stockholm, SE | Ferris' Fika Forum

Ferris' Fika Forum | Map

2024-03-26 | Barcelona, ES + Virtual | BcnRust

13th BcnRust Meetup

2024-03-26 - 2024-03-28 | London, UK | Rust Nation UK

Rust Nation 2024 - Conference

2024-03-28 | Berlin, DE | Rust Berlin

Rust and Tell

2024-04-10 | Cambridge, UK | Cambridge Rust Meetup

Rust Meetup Reboot 3

2024-04-10 | Oslo, NO | Rust Oslo

Rust Hack'n'Learn at Kampen Bistro

North America

2024-03-13 | Boston, MA, US | Boston Rust Meetup

Northeastern Rust Lunch

2024-03-19 | San Francisco, CA, US | San Francisco Rust Study Group

Rust Hacking in Person

2024-03-21 | Seattle, WA, US | Seattle Rust User Group

Seattle Rust User Group Meetup

2024-03-22 | Somerville, MA, US | Boston Rust Meetup

Somerville Union Square Rust Lunch, Mar 22

2024-03-26 | Minneapolis, MN, US | Minneapolis Rust Meetup

Minneapolis Rust: Getting started with Rust!

2024-03-27 | Austin, TX, US | Rust ATX

Rust Lunch - Fareground

2024-03-27 | Hawthorne, CA, US | Freeform

Rust in the Physical World 🦀 Tech Talk Event at Freeform

2024-03-31 | Boston, MA, US | Boston Rust Meetup

Beacon Hill Rust Lunch, Mar 31

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

In 10 years we went from “Rust will never replace C and C++” to “New C/C++ should not be written anymore, and you should use Rust”. Good job.

– dpc_pw on lobste.rs

Thanks to Dennis Luxen 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

#rust-lang #rust #rustlang #twir #long post

1 note · View note