An anonymous reader writes: The Rust team has announced the release of version 1.6 of their programming language. The biggest new feature is that libcore — the Rust core library — is now stable. "Rust's standard library is two-tiered: there's a small core library, libcore, and the full standard library, libstd, that builds on top of it. libcore is completely platform agnostic, and requires only a handful of external symbols to be defined. Rust's libstd builds on top of libcore, adding support for memory allocation, I/O, and concurrency. Applications using Rust in the embedded space, as well as those writing operating systems, often eschew libstd, using only libcore." Other features worth noting: Crates.io disallows wildcards for dependencies, there are a ton of stabilized APIs, timer functions that use milliseconds have been deprecated, and the parser will warn you if a failure was caused by Unicode characters that look similar but are interpreted differently.