What shipped in Rust on August 18, 2026?

Cargo is bringing back the new build-dir layout, and this time it's built to scale. In total, 108 commits and 26 pull requests landed.

Who contributed to Rust on August 18, 2026?

12 developers shipped this update, including bors, syphar, renovate, renovate-bot, Ubiratan Soares, 许杰友 Jieyou Xu (Joe), Matyáš Racek, and Jakub Beránek, and 4 more.

What were the notable Rust updates?

Re-stabilize build-dir layout v2, Enable `-Zembed-metadata=no` by default on nightly Cargo, and Auto merge of #161256 - JonathanBrouwer:rollup-WuI2sWX, r=JonathanBrouwer.

@rust-lang

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The Wire · Showcase

CARGO RE-STABILIZES BUILD-DIR LAYOUT V2

By RepoJournal · Filed 06:59 UTC on August 18, 2026 · About Rust

12 people shipped this

bors @bors 3 cited

Jonathan Brouwer @JonathanBrouwer 2 cited

syphar @syphar 1 cited

renovate @renovate 1 cited

renovate-bot @renovate-bot 1 cited

Jakub Beránek @Kobzol 1 cited

ranger-ross @ranger-ross 1 cited

Ubiratan Soares @ubiratansoares

许杰友 Jieyou Xu (Joe) @jieyouxu

Matyáš Racek @panstromek

Weihang Lo @weihanglo

Suryansh-Dey @Suryansh-Dey

Cargo is bringing back the new build-dir layout, and this time it's built to scale.

Cargo re-stabilized the build-dir layout v2 [1], rolling back the rollback after three fixes addressed the performance and scaling issues that forced it off nightly. The layout, tracked in cargo issue #15010, is back with mitigations from PRs #17191, #17168, and #17236. Meanwhile, nightly Cargo also enables `-Zembed-metadata=no` by default [2], cutting metadata from embedded rlibs for faster builds, though it's clearly still experimental. On the rust-lang/rust side, a 12-PR rollup merged [3] that includes new atomic volatile intrinsics and the `unspecified_from()` API for IP and socket addresses. Infra cleanup continues: rust-timer branches are gone [4], and jdno is out of the infra-ci rotation [5] since triagebot kept assigning him PRs he hasn't been reviewing. Docs.rs is dropping `releases.files` and `releases.archive_storage` [6], simplifying storage and removing file list generation. And the index added crates like `glimta` and `diversion` [7] [8]. Skip the lock file bumps [9] [10] - they're routine.

Action items

→ Test the re-stabilized build-dir layout v2 on nightly; report any regressions rust-lang/cargo [plan]
→ Monitor nightly Cargo's default -Zembed-metadata=no; watch for build script issues rust-lang/cargo [monitor]
→ Watch for docs.rs storage changes; verify your crate's docs still build rust-lang/docs.rs [monitor]
→ Ignore the lock file maintenance PRs; routine dependency refresh rust-lang/docs.rs [monitor]

References

[1] Re-stabilize build-dir layout v2 ↗ rust-lang/cargo
[2] Enable `-Zembed-metadata=no` by default on nightly Cargo ↗ rust-lang/cargo
[3] Auto merge of #161256 - JonathanBrouwer:rollup-WuI2sWX, r=JonathanBrouwer rust-lang/rust
[4] Rollup merge of #161145 - Kobzol:remove-rust-timer-branches, r=Mark-Simulacrum rust-lang/rust
[5] Rollup merge of #161237 - Kobzol:remove-jdno-from-rotation, r=jieyouxu rust-lang/rust
[6] drop releases.files and releases.archive_storage, don't generate file list ↗ rust-lang/docs.rs
[7] Create crate `glimta` rust-lang/crates.io-index
[8] Create crate `diversion` rust-lang/crates.io-index
[9] chore(deps): lock file maintenance ↗ rust-lang/docs.rs
[10] Lock file maintenance ↗ rust-lang/team

Quick answers

What shipped in Rust on August 18, 2026?: Cargo is bringing back the new build-dir layout, and this time it's built to scale. In total, 108 commits and 26 pull requests landed.
Who contributed to Rust on August 18, 2026?: 12 developers shipped this update, including bors, syphar, renovate, renovate-bot, Ubiratan Soares, 许杰友 Jieyou Xu (Joe), Matyáš Racek, and Jakub Beránek, and 4 more.
What were the notable Rust updates?: Re-stabilize build-dir layout v2, Enable `-Zembed-metadata=no` by default on nightly Cargo, and Auto merge of #161256 - JonathanBrouwer:rollup-WuI2sWX, r=JonathanBrouwer.

RUST'S INTERNAL CLEANUP ACCELERATES

Rust's core is getting leaner, with two key dependency removals landing in the compiler and libc dropping Dependabot for Renovate.

rust 130 shipped

@rust-lang Aug 17

RUST-ANALYZER SHIPS THREE RELEASES OVERNIGHT; STDLIB FIXES UNWIND GUARDS AND SOCKET PATHS

Rust-analyzer deployed three point releases in rapid succession [ref:6][ref:7][ref:8] while the standard library landed critical fixes for thread parking and Unix socket address truncation across BSD variants.

rust 136 shipped

@rust-lang Aug 16

EXTERN CUSTOM ABI STABILIZED, CARGO SUBMODULE UPDATED

Rust stabilized `extern "custom"` for low-level FFI functions with non-standard calling conventions, closing a long-awaited tracking issue.

rust 83 shipped

@rust-lang Aug 15

RUST-ANALYZER FIXES CONSTEVAL ERRORS AND RUSTC_PRIVATE SUPPORT

Rust-analyzer stops returning misleading None values when const evaluation fails, aligning more closely with rustc's error handling strategy.

rust 116 shipped

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