1.31.1 announcement

posts/2018-12-20-Rust-1.31.1.md

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+---
+layout: post
+title: "Announcing Rust 1.31.1"
+author: The Rust Release Team
+---
+
+The Rust team is happy to announce a new version of Rust, 1.31.1. Rust is a
+systems programming language focused on safety, speed, and concurrency.
+
+If you have a previous version of Rust installed via rustup, getting Rust
+1.31.1 is as easy as:
+
+```
+$ rustup update stable
+```
+
+If you don't have it already, you can [get `rustup`][install] from the
+appropriate page on our website, and check out the [detailed release notes for
+1.31.1][notes] on GitHub.
+
+[install]: https://www.rust-lang.org/install.html
+[notes]: https://github.com/rust-lang/rust/blob/master/RELEASES.md#version-1311-2018-12-20
+
+## What's in 1.31.1 stable
+
+This patch release fixes a build failure on `powerpc-unknown-netbsd` by
+way of [an update to the `libc`
+crate](https://github.com/rust-lang/rust/pull/56562) used by the compiler.
+
+Additionally, the Rust Language Server was updated to fix two critical bugs.
+First, [hovering over the type with documentation above single-line
+attributes led to 100% CPU
+usage:](https://github.com/rust-lang/rls/pull/1170)
+
+```rust
+/// Some documentation
+#[derive(Debug)] // Multiple, single-line
+#[allow(missing_docs)] // atributes
+pub struct MyStruct { /* ... */ }
+```
+
+[Go to definition was fixed for std types](https://github.com/rust-lang/rls/pull/1171):
+Before, using the RLS on `HashMap`, for example, tried to open this file
+
+```text
+~/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/libstd/collections/hash/map.rs
+```
+
+and now RLS goes to the correct location (for Rust 1.31, note the extra `src`):
+
+```text
+~/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/src/libstd/collections/hash/map.rs
+```