PSA: Most of the newly-stabilized APIs are backported to Rust 1.31! All it takes is
cargo add standback and
use standback::prelude::*. For anything that needs to be imported,
use standback::blah instead of
use std::blah. will suffice.
All newly stabilized APIs will be aliased on the new compilers and shimmed on old ones. As such, there's no compatibility issues.