RepoJournal
Rust

@rust-lang

The Rust language, Cargo, and the standard library

Pick a date

  1. Sat 30 may
  2. Sun 31 may
  3. Mon 1 jun
  4. Mon 8 jun
  5. Tue 9 jun
  6. Wed 10 jun
  7. Thu 11 jun
  8. Fri 12 jun
  9. Sat 13 jun
  10. Sun 14 jun
  11. Mon 15 jun
  12. Tue 16 jun
  13. Wed 17 jun
  14. Thu 18 jun
  15. Sat 27 jun
  16. Sun 28 jun
  17. Mon 29 jun
  18. Tue 30 jun
  19. Wed 1 jul
  20. Thu 2 jul
  21. Fri 3 jul
  22. Sat 4 jul
  23. Sun 5 jul
  24. Mon 6 jul
  25. Tue 7 jul
  26. Wed 8 jul
  27. Thu 9 jul
  28. Fri 10 jul
  29. Sat 11 jul
  30. Today 12 jul
Topics: Rust Full archive →

The Wire · Showcase

RUST COMPILER SHRINKS MIR, MIRI ADDS SYSCALL SHIMS

By RepoJournal · Filed · About Rust

bors renovate JonathanBrouwer LorrensP-2158466 aerooneqq pluiee faukah
10 people shipped this
bors @bors 5 cited renovate @renovate 3 cited JonathanBrouwer @JonathanBrouwer 1 cited LorrensP-2158466 @LorrensP-2158466 1 cited aerooneqq @aerooneqq 1 cited pluiee @pluiee 1 cited faukah @faukah 1 cited WhySoBad @WhySoBad 1 cited enthropy7 @enthropy7 1 cited RalfJung @RalfJung

The compiler team landed a 14-PR rollup that cuts mir::Statement size to 40 bytes while the Miri interpreter gains critical Unix syscall coverage with gethostname, poll, and futimens support.

The biggest compiler win overnight is a memory optimization [1] that shrinks mir::Statement from 48 to 40 bytes, a meaningful reduction for anyone holding large MIR representations in memory. The same rollup included documentation fixes for AtomicU128/AtomicI128 availability [2] and improved diagnostics for const operations [1]. On the interpreter side, Miri's been filling gaps in its syscall coverage: gethostname now works across Linux/BSD/macOS with proper target-specific behavior [5], poll() syscall support landed [6] for file descriptor readiness, and File::set_times now works via futimens [7]. Two additional compiler improvements landed around resolver arena optimization [3] and delegation's Self type mapping for non-first arguments [4], both addressing known performance and ergonomic pain points. The crates.io frontend continues steady dependency updates [8], [9], [10] while the registry itself ticks forward with crate index updates [11], [12], [13], [14], [15].

Action items

References

  1. [1] Rollup of 14 pull requests ↗ rust-lang/rust
  2. [2] Include AtomicU128/AtomicI128 in docs for any target ↗ rust-lang/rust
  3. [3] Resolver: Wrap arenas in `WorkerLocal` ↗ rust-lang/rust
  4. [4] delegation: support `Self` mapping adjustments for non-first arguments ↗ rust-lang/rust
  5. [5] shims: add a shim for gethostname ↗ rust-lang/miri
  6. [6] Add `poll` shim ↗ rust-lang/miri
  7. [7] Support File::set_times via futimens shim ↗ rust-lang/miri
  8. [8] Update dependency @types/node to v24.13.3 ↗ rust-lang/crates.io
  9. [9] Update dependency pnpm to v11.11.0 ↗ rust-lang/crates.io
  10. [10] Update dependency svelte-check to v4.7.2 ↗ rust-lang/crates.io
  11. [11] Update crate `smix-sdk` rust-lang/crates.io-index
  12. [12] Update crate `smix-host-coord-resolver` rust-lang/crates.io-index
  13. [13] Update crate `hisi-fwpkg` rust-lang/crates.io-index
  14. [14] Update crate `smix-driver` rust-lang/crates.io-index
  15. [15] Update crate `smix-runner-client` rust-lang/crates.io-index

Quick answers

What shipped in Rust on July 12, 2026?
The compiler team landed a 14-PR rollup that cuts mir::Statement size to 40 bytes while the Miri interpreter gains critical Unix syscall coverage with gethostname, poll, and futimens support. In total, 85 commits and 25 pull requests landed.
Who contributed to Rust on July 12, 2026?
10 developers shipped this update, including bors, JonathanBrouwer, LorrensP-2158466, aerooneqq, pluiee, faukah, RalfJung, and WhySoBad, and 2 more.
What were the notable Rust updates?
Rollup of 14 pull requests, Include AtomicU128/AtomicI128 in docs for any target, and Resolver: Wrap arenas in `WorkerLocal`.

More from @rust-lang

Rust @rust-lang

RUST 1.97.0 LANDS IN CRATES.IO AS COMPILER INFRASTRUCTURE TIGHTENS

The Rust compiler shipped its latest minor release overnight, and crates.io has already cut over to it while the core team continues aggressive cleanup work on the AST layer.

bors Jiahao XU Turbo87 renovate +6
rust 75 shipped 1-min read
Rust @rust-lang

RUST 1.97.0 SHIPS WITH CONST GENERICS PROGRESS AND POLONIUS FIXES

The language team stabilized new target features and fixed critical borrowck regressions while rust-analyzer cuts LSP overhead with gen-lsp-types v0.10.0.

ribru17
rust 155 shipped 1-min read
Rust @rust-lang

RUST COMPILER GAINS RANGEINCLUSIVEITER OPTIMIZATION, SOLVER FIXES LAND

RangeInclusive loops just got faster with new Step trait methods that enable the compiler to eliminate overflow checks [ref:11], while the next solver's rigid parameter environment handling shipped to fix normalization bugs [ref:12].

pitaj adwinwhite jchlanda tgross35
rust 116 shipped 1-min read
Rust @rust-lang

RUST-ANALYZER REWRITES MACRO EXPANSION INTERNALS, COMPILER PREDICATE CLEANUP LANDS

Rust-analyzer stripped out another batch of legacy `ExpandDatabase` queries overnight while the compiler team tackled redundant predicate handling in type checking.

ada4a nnethercote JonathanBrouwer lnicola
rust 117 shipped 1-min read

Daily updates, in your inbox

Follow Rust

The Rust language, Cargo, and the standard library We'll email you a link to confirm first.

Free. Confirm via email. Unsubscribe in one click.

— or follow the whole beat:

Elsewhere on the wire

Elixir & Phoenix Elixir & Phoenix

ELIXIR CLOSES COMPLETION AND OPERATOR SIGNATURE GAPS

The Elixir team shipped fixes for two long-standing IDE friction points: cursor completion after operators and proper type signatures for the ++ concatenation operator.

José Valim
elixir 2 shipped 1-min read
Mobile platforms Mobile platforms

SWIFT TIGHTENS AVAILABILITY DIAGNOSTICS AS FLUTTER TRACKS SKIA UPDATES

Swift's compiler now correctly diagnoses uses of unavailable API members in universally unavailable extensions, closing a gap that let invalid code slip through.

engine-flutter-autoroll tshortli
mobile 8 shipped 1-min read
.NET @dotnet

ANDROID SSL VALIDATION BYPASS PATCHED; WASM JIT ALIGNMENT FIXES BLOCKER

SslStream on Android was ignoring platform certificate pinning entirely, bypassing network_security_config.xml and allowing rejected certificates through.

Šimon Rozsíval Andy Ayers Max Charlamb Rolf Bjarne Kvinge
dotnet 28 shipped 1-min read
Spring @spring-projects

SPRING-AI FIXES SILENT DATA LOSS IN BATCH EMBEDDING STRATEGY

A critical bug in TokenCountBatchingStrategy was dropping duplicate documents during batch processing, silently returning fewer embeddings than requested.

dependabot subhash polisetti Artem Bilan
java 9 shipped 1-min read