Who contributed to Rust on August 25, 2026?

6 developers shipped this update, including bors, RalfJung, Waffle Lapkin, mvolfik, dybucc, and chengr4.

What were the notable Rust updates?

Auto merge of #155499 - WaffleLapkin:stabilize-never-type, r=JonathanBrouwer, remove `dependency_on_unit_never_type_fallback` lint, and remove `#![feature(never_type)]` from tools.

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The Wire · Showcase

The never type is stable

By RepoJournal · Filed 06:59 UTC on August 25, 2026 · About Rust

6 people shipped this

bors @bors 2 cited

RalfJung @RalfJung 2 cited

Waffle Lapkin @WaffleLapkin 2 cited

mvolfik @mvolfik 1 cited

dybucc @dybucc 1 cited

chengr4 @chengr4

Rust's never type just went stable, making `!` a first-class citizen that changes how fallback works on every edition.

Rust's never type `!` is now stable, and the fallback for diverging expressions is `!` on all editions, a breaking change with crater analysis behind it [1]. WaffleLapkin followed up by stripping the `dependency_on_unit_never_type_fallback` lint [2] and removing `#![feature(never_type)]` from the tools [3]. Meanwhile, Miri walked back a recent decision: custom allocators won't get `noalias` after all, pending a future `NativeAllocator` wrapper [4]. The team also merged a follow-up that unifies the signal shim macros [5]. On the libc desk, HelenOS support landed as a stable-nominated PR that the author plans to backport to libc 0.2 [6]. Elsewhere, libc is cleaning up L4Re bindings by deprecating LFS symbols and adjusting offsets [7]. The crates.io-index churned through routine crate updates, nothing alarming [8]. This period saw 109 commits and 22 PRs across the five repos.

Action items

→ Test your code against the never type fallback change, especially code with diverging match arms rust-lang/rust [plan]
→ Review custom allocator code for `noalias` assumptions and wait for the `NativeAllocator` wrapper rust-lang/miri [monitor]
→ Watch for the HelenOS backport to libc 0.2 and plan around it if you target that OS rust-lang/libc [monitor]

References

[1] Auto merge of #155499 - WaffleLapkin:stabilize-never-type, r=JonathanBrouwer rust-lang/rust
[2] remove `dependency_on_unit_never_type_fallback` lint rust-lang/rust
[3] remove `#![feature(never_type)]` from tools rust-lang/rust
[4] Custom allocators do not get noalias after all ↗ rust-lang/miri
[5] unify shim_sig and shim_sig_variadic macros ↗ rust-lang/miri
[6] Add HelenOS support ↗ rust-lang/libc
[7] l4re: deprecate lfs bindings rust-lang/libc
[8] Update crate `pamoja-security` rust-lang/crates.io-index

Quick answers

What shipped in Rust on August 25, 2026?: Rust's never type just went stable, making `!` a first-class citizen that changes how fallback works on every edition. In total, 109 commits and 22 pull requests landed.
Who contributed to Rust on August 25, 2026?: 6 developers shipped this update, including bors, RalfJung, Waffle Lapkin, mvolfik, dybucc, and chengr4.
What were the notable Rust updates?: Auto merge of #155499 - WaffleLapkin:stabilize-never-type, r=JonathanBrouwer, remove `dependency_on_unit_never_type_fallback` lint, and remove `#![feature(never_type)]` from tools.