rustup update
rustc 1.35.0-nightly (96d700f1b 2019-04-10)
cargo 1.35.0-nightly (6f3e9c367 2019-04-04)
rustup 1.17.0 (069c88ed6 2019-03-05)
#![feature(integer_atomics)]
// For `lumen_runtime::binary::heap::<Iter as Iterator>.size_hint`
#![feature(ptr_offset_from)]
-// for conversion of `usize` to `lumen_runtime::term::Tag`
-#![feature(try_from)]
// For allocation multiple contiguous terms in `Term::alloc_count`.
#![feature(try_reserve)]
// for `lumen_runtime::term::Term`
