Rust 1.91 promotes Windows on Arm64 to Tier 1 target

The Rust Release Team has released Rust 1.91, an update of the popular memory-safe programming language that promotes Windows on Arm64 platform to a Tier 1 supported target.

Rust 1.91 was announced October 30. Previous users can upgrade by running rustup update stable.

With Rust 1.91, the aarch64-pc-windows-msvc target is promoted to Tier 1 support, bringing the highest guarantees to users of 64-bit Arm systems running Windows, the Rust Release Team said. Tier 1 targets provide the highest support guarantees, with the project’s full test suite run on those platforms for every change merged in the compiler. Prebuilt binaries also are available.

Also in Rust 1.91, the team has added a warn-by-default lint on raw pointers to local variables being returned from functions. Although Rust’s borrow checking prevents dangling references from being returned, it does not track raw pointers.

Rust 1.91 also stabilizes 60 APIs and makes seven previously stable APIs stable in const contexts. The release also stabilizes the build.build-dir config of the Cargo package manager. This config sets the directory where intermediate build artifacts are stored, the Rust Release Team said. These artifacts are produced by Cargo and rustc during the build process.  

Rust 1.91 follows the September 18 release of Rust 1.90. That release offered native support for workspace publishing for Cargo.

The Rust language is positioned as being fast and memory-efficient, with no runtime or garbage collector, and the ability to power performance-critical services and embedded devices.