Who contributed to Rust on June 9, 2026?

3 developers shipped this update, including Turbo87, renovate[bot], and Marwes.

What were the notable Rust updates?

Auto merge of #157616 - JonathanBrouwer:rollup-TC4GBP2, r=JonathanBrouwer, Ignore self-referencing dependencies when checking crate deletion requirements, and Update Rust crate http to v1.4.2.

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The Rust language, Cargo, and the standard library

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The Wire · Showcase

RUSTC ROLLUP LANDS XTENSA SUPPORT, CRATES.IO FIXES SELF-REFERENCING BLOCKS

By RepoJournal · Filed 06:04 UTC on June 9, 2026 · About Rust

3 people shipped this

Turbo87 @Turbo87 3 cited

renovate[bot] @renovate[bot] 1 cited

Marwes @Marwes 1 cited

The compiler gained a major new architecture target while the registry fixed a deletion blocker that was trapping maintainers with circular dependencies.

The rust compiler inbox is moving fast. A 13-PR rollup landed overnight [1] that includes Xtensa architecture support for inline assembly, the first real implementation of compile-time function evaluation, and a new proc-macro `_value` API for number literals. These aren't incremental; Xtensa is a significant embedded win, and comptime functions open new doors for const evaluation. On the registry side, crates.io fixed a critical oversight where self-referencing dependencies were blocking crate deletion [2]. Maintainers trying to clean up old versions were getting trapped because the deletion check couldn't distinguish between legitimate reverse dependencies and a crate depending on itself. That's resolved now. The http crate bumped to 1.4.2 [3] with a fix allowing `"*"` as a valid URI path in the builder, a small but necessary correction for HTTP spec compliance. Meanwhile, the regex team landed a significant performance win [4] by avoiding repeated canonicalization of huge IntervalSets on push operations, addressing a real-world bottleneck hit by lalrpop-generated lexers with massive character ranges. Observability work continues at crates.io with new logging conventions [5] and better error interpolation into messages [6], making the backend easier to debug in production.

Action items

→ Update http to 1.4.2 if you're using URI builder with wildcard paths rust-lang/crates.io [plan]
→ Review crate deletion requirements if you've been blocked on cleanup rust-lang/crates.io [monitor]
→ Watch for Xtensa stabilization timeline in compiler PRs rust-lang/rust [monitor]

References

[1] Auto merge of #157616 - JonathanBrouwer:rollup-TC4GBP2, r=JonathanBrouwer rust-lang/rust
[2] Ignore self-referencing dependencies when checking crate deletion requirements ↗ rust-lang/crates.io
[3] Update Rust crate http to v1.4.2 ↗ rust-lang/crates.io
[4] perf: Avoid re-canonicalizing the entire IntervalSet on push ↗ rust-lang/regex
[5] Add `docs/LOGGING.md` with backend logging conventions ↗ rust-lang/crates.io
[6] Interpolate error values into log messages ↗ rust-lang/crates.io

Quick answers

What shipped in Rust on June 9, 2026?: The compiler gained a major new architecture target while the registry fixed a deletion blocker that was trapping maintainers with circular dependencies. In total, 107 commits and 24 pull requests landed.
Who contributed to Rust on June 9, 2026?: 3 developers shipped this update, including Turbo87, renovate[bot], and Marwes.
What were the notable Rust updates?: Auto merge of #157616 - JonathanBrouwer:rollup-TC4GBP2, r=JonathanBrouwer, Ignore self-referencing dependencies when checking crate deletion requirements, and Update Rust crate http to v1.4.2.

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