Announcing Rust 1.22 (and 1.22.1)

Incremental minor release with standard library refinements and Cargo usability improvements, lacking a transformative language feature or major ecosystem impact.

Library stabilizations

A few new APIs were stabilized this release:

Box<Error> now impls From<Cow<str>>
std::mem::Discriminant is now guaranteed to be Send + Sync
fs::copy now returns the length of the main stream on NTFS.
Properly detect overflow in Instant += Duration.
impl Hasher for {&mut Hasher, Box<Hasher>}
impl fmt::Debug for SplitWhitespace.

See the detailed release notes for more.

Cargo features

If you have a big example to show your users, Cargo has grown the ability to build multi-file examples by creating a subdirectory inside examples that contains a main.rs.

Cargo now has the ability to vendor git repositories.

See the detailed release notes for more.