Who contributed to Rust on June 8, 2026?

2 developers shipped this update, including weihanglo and dependabot[bot].

What were the notable Rust updates?

Auto merge of #157374 - khyperia:remove-UnevaluatedConstKind-def_id, r=BoxyUwU, Remove possibly footgunny `is_const` method, and fix: strip CR from `cargo:token-from-stdout`.

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The Wire · Showcase

CONST EVALUATION OVERHAUL LANDS; CARGO WINDOWS TOKEN BUG BLOCKS REGISTRY ACCESS

By RepoJournal · Filed 22:44 UTC on June 8, 2026 · About Rust

2 people shipped this

dependabot[bot] @dependabot[bot] 3 cited

weihanglo @weihanglo 1 cited

The compiler just shipped a major const evaluation refactor that removes UnevaluatedConstKind::def_id, while cargo's registry authentication is broken on Windows due to a carriage return parsing bug that's been live since 1.96.

The const evaluation work [1] lands as part of the larger effort to decouple const handling from DefID, removing the footgunny is_const method [2] in the process. This is foundational work that unblocks feature-specific const improvements down the line. Meanwhile, cargo has a production blocker [3]: Windows token helpers emit \r\n line endings, but the adaptor only strips \n, leaving a trailing \r that http::HeaderValue now rejects. Users on Windows trying to authenticate with the registry hit "failed to parse header value" and can't proceed. The fix is simple - trim the \r after \n - but this has been live since cargo 1.96's registry refactor and needs immediate patching. On the testing front, the rustdoc build saw cleanup [4] and test suite reliability improved [5] [6] with XFS filesystem fixes and diagnostic ordering relaxation for parallel frontends. libc's CI got routine infrastructure updates [7] [8] [9], and bors bumped askama to 0.16.0 [10] [11]. crates.io-index saw five routine package updates across sp1 tooling and ui components [12] [13] [14] [15] [16].

Action items

→ Patch cargo immediately for Windows registry authentication - users are blocked rust-lang/cargo [immediate]
→ Review const evaluation changes [ref:6] [ref:7] if you maintain feature-specific const handling rust-lang/rust [plan]
→ Monitor libc CI infrastructure updates for test stability rust-lang/libc [monitor]

References

[1] Auto merge of #157374 - khyperia:remove-UnevaluatedConstKind-def_id, r=BoxyUwU rust-lang/rust
[2] Remove possibly footgunny `is_const` method rust-lang/rust
[3] fix: strip CR from `cargo:token-from-stdout` ↗ rust-lang/cargo
[4] rustdoc: Remove unnecessary fast path rust-lang/rust
[5] Rollup merge of #156762 - ferrocene:hoverbear/xfs-test-fix, r=Mark-Simulacrum rust-lang/rust
[6] Rollup merge of #157300 - zetanumbers:fix-note-on-different-line-tests, r=petrochenkov rust-lang/rust
[7] build(deps): bump vmactions/solaris-vm from 1.3.6 to 1.3.7 ↗ rust-lang/libc
[8] build(deps): bump taiki-e/install-action from 2.81.2 to 2.81.8 ↗ rust-lang/libc
[9] build(deps): bump vmactions/netbsd-vm from 1.3.9 to 1.4.0 ↗ rust-lang/libc
[10] Merge pull request #760 from GuillaumeGomez/update-askama rust-lang/bors
[11] Update `askama` dependency to `0.16.0` version rust-lang/bors
[12] Update crate `sp1-lib` rust-lang/crates.io-index
[13] Update crate `nice-plug` rust-lang/crates.io-index
[14] Update crate `sp1-cli` rust-lang/crates.io-index
[15] Update crate `atomr-agents-context` rust-lang/crates.io-index
[16] Update crate `zng-wgt-ansi-text` rust-lang/crates.io-index

Quick answers

What shipped in Rust on June 8, 2026?: The compiler just shipped a major const evaluation refactor that removes UnevaluatedConstKind::def_id, while cargo's registry authentication is broken on Windows due to a carriage return parsing bug that's been live since 1.96. In total, 101 commits and 17 pull requests landed.
Who contributed to Rust on June 8, 2026?: 2 developers shipped this update, including weihanglo and dependabot[bot].
What were the notable Rust updates?: Auto merge of #157374 - khyperia:remove-UnevaluatedConstKind-def_id, r=BoxyUwU, Remove possibly footgunny `is_const` method, and fix: strip CR from `cargo:token-from-stdout`.

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