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wire 2026-10-08
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Next-solver test migration continues across the compiler tree

By RepoJournal · Filed · About Rust · Composed from the cited sources · methodology

The day's work in rust-lang/rust is almost entirely about pinning down what the next trait solver does to existing diagnostics, while the crate index and stdarch tick along on automation.

even more `tests/crashes` migration for `-Znext-solver` rust-lang/rust

by lcnr

lcnr continues the tests/crashes migration for -Znext-solver, carrying over from the previous batch. Two entries, the issues behind rust-lang/rust#126680 and rust-lang/rust#131886, are noted as still broken because of a known trait-system-refactor blocker rather than because the migration slipped.

revisions for TAIT in env bug rust-lang/rust

by lcnr

lcnr adds revisions for the TAIT-in-env bug, the test-side counterpart to the same next-solver push. Taking this together with the crashes migration, the theme is consistent: existing UI tests are being converted into revision-pinned expectations before solver behavior is allowed to shift underneath them.

abby DSL: implement ambiguity rust-lang/rust

by khyperia

khyperia implements ambiguity in the abby DSL and has requested review from BoxyUwU. It is the only non-test-migration compiler change on the board today, aimed at the tooling used to describe trait-system behavior.

Rollup of 16 pull requests rust-lang/rust

by JonathanBrouwer

A rollup of 16 pull requests lands, including the removal of the NonOwner variant from AstOwner, an IBM f128 type, a rustc-perf submodule update, and a GVN fix that now includes the offset in the alignment check when creating ConstValue::Indirect. The GVN change is the one most likely to alter generated code rather than just internals.

Rustc pull update rust-lang/stdarch

by workflows-stdarch

Routine mechanical work filled out the rest of the day: the crates.io index picked up index updates for the inillucent, inillucent-cli, inillucent-migrate, inillucent-driver-capi, and inillucent-remote crates, and stdarch merged its latest rustc pull. TWiR 673 has a draft open and TWiR 672 got its CFT, FCP, MCP, and RFC sections refreshed.

Quick answers

What shipped in Rust on October 8, 2026?
The day's work in rust-lang/rust is almost entirely about pinning down what the next trait solver does to existing diagnostics, while the crate index and stdarch tick along on automation. In total, 127 commits and 45 pull requests landed.
Who contributed to Rust on October 8, 2026?
11 developers shipped this update, including bors, khyperia, lcnr, JonathanBrouwer, mariannegoldin, tzilist, Alexis Lothoré, and Sylvain kerkour, and 3 more.
What were the notable Rust updates?
even more `tests/crashes` migration for `-Znext-solver`, revisions for TAIT in env bug, and abby DSL: implement ambiguity.