Rust [2015] (stable) is now Rust 2018 (stabilising some features; small number of breaking changes preparing for the coming years of updates). https://blog.rust-lang.org/2018/12/06/Rust-1.31-and-rust-2018.html https://hacks.mozilla.org/2018/12/rust-2018-is-here/
It's a great time to have a look at #RustLang and maybe try some of those Advent of Code problems (an ideal project for building lib & tooling familiarity). https://adventofcode.com/2018