Announcing Rust 1.85.1

posts/Rust-1.85.1.md

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+layout = "post"
+date = 2025-03-18
+title = "Announcing Rust 1.85.1"
+author = "The Rust Release Team"
+release = true
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+
+The Rust team has published a new point release of Rust, 1.85.1. Rust is a
+programming language that is empowering everyone to build reliable and
+efficient software.
+
+If you have a previous version of Rust installed via rustup, getting Rust
+1.85.1 is as easy as:
+
+```
+rustup update stable
+```
+
+If you don't have it already, you can [get `rustup`][rustup] from the
+appropriate page on our website.
+
+[rustup]: https://www.rust-lang.org/install.html
+
+## What's in 1.85.1
+
+### Fixed combined doctest compilation
+
+Due to a bug in the implementation, [combined doctests](https://doc.rust-lang.org/edition-guide/rust-2024/rustdoc-doctests.html) did not work as intended in the stable 2024 Edition. Internal errors with feature stability caused rustdoc to automatically use its "unmerged" fallback method instead, like in previous editions.
+
+Those errors are now fixed in 1.85.1, realizing the performance improvement of combined doctest compilation as intended! See the [backport issue](https://github.com/rust-lang/rust/issues/138418) for more details, including the risk analysis of making this behavioral change in a point release.
+
+### Other fixes
+
+1.85.1 also resolves a few regressions introduced in 1.85.0:
+
+- [Relax some `target_feature` checks when generating docs.](https://github.com/rust-lang/rust/pull/137632/)
+- [Fix errors in `std::fs::rename` on Windows 1607.](https://github.com/rust-lang/rust/pull/137528/)
+- [Downgrade bootstrap `cc` to fix custom targets.](https://github.com/rust-lang/rust/pull/137460/)
+- [Skip submodule updates when building Rust from a source tarball.](https://github.com/rust-lang/rust/pull/137338/)
+
+### Contributors to 1.85.1
+
+Many people came together to create Rust 1.85.1. We couldn't have done it
+without all of you. [Thanks!](https://thanks.rust-lang.org/rust/1.85.1/)