Who contributed to Rust on August 21, 2026?

6 developers shipped this update, including bors, Jonathan Brouwer, hkalbasi, tomassedovic, Travis Cross, and weihanglo.

What were the notable Rust updates?

Add shim for `malloc_usable_size`, Rollup merge of #161190 - im-lunex:fix_#161101, r=oli-obk, and Rollup merge of #161384 - Kobzol:remove-sccache, r=jieyouxu.

@rust-lang

The Rust language, Cargo, and the standard library

github ↗

Pick a date

Topics: Rust Full archive →

The Wire · Showcase

RUST TOOLING MODERNIZES AS MIRI FIXES ASYNC CRASH

By RepoJournal · Filed 07:06 UTC on August 21, 2026 · About Rust

6 people shipped this

Jonathan Brouwer @JonathanBrouwer 5 cited

weihanglo @weihanglo 2 cited

hkalbasi @hkalbasi 1 cited

bors @bors

tomassedovic @tomassedovic

Travis Cross @traviscross

The Rust ecosystem is quietly upgrading its internal tooling while the interpreter that catches UB gets a critical fix for a crash in async code.

Miri landed a shim for `malloc_usable_size` [1], filling a gap in its libc emulation, and a rollup includes a fix for a crash in async-drop and async-gen that rewrites `AsyncGenPending` constants [2], so if you rely on Miri to validate async code, this patch matters. Meanwhile, rustc is unblocking CI by busting sccache's cache [3], after GCC tests were falsely passing, and rustdoc now only generates search DOM elements when a search query is present [4], cutting unnecessary work on every docs page. A rollup in both rustc and Miri adds a regression test for a hidden glob reexports issue [5][6], ensuring a known breakage stays fixed. On the cargo-team side, the release tooling is being modernized: cargo-new-release migrates to a Cargo script [7] and strips out confirmation prompts [8]. The only release this period is the crates.io index -style one, with 128 commits and 8 PRs across the repos. The picture is a stack getting faster and more reliable, one shim and one cache bust at a time.

Action items

→ Pull in the Miri shim for `malloc_usable_size` to keep your interpreter runs accurate rust-lang/miri [plan]
→ Watch for the async-drop fix in Miri, it addresses a crash you may hit with async generators rust-lang/miri [monitor]
→ If you run rustc CI or mirror its tooling, note the sccache cache bust to avoid false test passes rust-lang/rust [plan]

References

[1] Add shim for `malloc_usable_size` ↗ rust-lang/miri
[2] Rollup merge of #161190 - im-lunex:fix_#161101, r=oli-obk rust-lang/miri
[3] Rollup merge of #161384 - Kobzol:remove-sccache, r=jieyouxu rust-lang/rust
[4] Rollup merge of #160639 - GuillaumeGomez:search-dom, r=lolbinarycat rust-lang/rust
[5] Rollup merge of #160582 - mejrs:hidden_glob_reexports-test, r=davidtwco rust-lang/miri
[6] Rollup merge of #160582 - mejrs:hidden_glob_reexports-test, r=davidtwco rust-lang/rust
[7] feat(tools): migrate cargo-new-release to a Cargo script ↗ rust-lang/cargo-team
[8] fix(tools): remove release confirmation prompts rust-lang/cargo-team

Quick answers

What shipped in Rust on August 21, 2026?: The Rust ecosystem is quietly upgrading its internal tooling while the interpreter that catches UB gets a critical fix for a crash in async code. In total, 128 commits, 8 pull requests, and 1 releases landed.
Who contributed to Rust on August 21, 2026?: 6 developers shipped this update, including bors, Jonathan Brouwer, hkalbasi, tomassedovic, Travis Cross, and weihanglo.
What were the notable Rust updates?: Add shim for `malloc_usable_size`, Rollup merge of #161190 - im-lunex:fix_#161101, r=oli-obk, and Rollup merge of #161384 - Kobzol:remove-sccache, r=jieyouxu.

Rust rolls 20 PRs into main while rustfmt fixes brace placement

The Rust compiler landed a massive 20-PR rollup overnight, and rustfmt corrected a brace-placement bug that affects Style Edition 2027.

rust 131 shipped

@rust-lang Aug 20

RUST-LANG INFRASTRUCTURE SHIFTS GEARS: DATADOG UPGRADE AND ACCESS REVOCATIONS LEAD THE DAY

Rust's own infrastructure is moving to Datadog provider v4, while a key maintainer's access is being cut, signaling a period of tightening security and modernizing tooling.

rust 114 shipped

@rust-lang Aug 19

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 18

CARGO RE-STABILIZES BUILD-DIR LAYOUT V2

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

rust 134 shipped

Elsewhere on the wire

AI Agents Aug 22

Cline hubs get drain and replay as Langchain plumb gates

Cline just shipped rollover-grade hub commands while Langchain exposes gateway internals, and OpenHands quietly broke its own monitoring contract.

ai-agents 42 shipped

Local LLMs Aug 22

SGLang ships v0.5.18 with 710 PRs and DeepSeek V4 FP4 auto-routing

The biggest release of the week just landed: SGLang v0.5.18 adds new models, fixes a silent disagg bug, and defaults DeepSeek V4 FP4 checkpoints to the right MoE runner.