Doesn't seem to build

[installgentoo]

error[E0432]: unresolved import `std::boxed::FnBox`
  --> /_/code/.cache_rust/registry/src/github.com-1ecc6299db9ec823/coroutine-0.8.0/src/asymmetric.rs:25:5
   |
25 | use std::boxed::FnBox;
   |     ^^^^^^^^^^^^^^^^^ no `FnBox` in `boxed`

error[E0554]: `#![feature]` may not be used on the stable release channel
  --> /_/code/.cache_rust/registry/src/github.com-1ecc6299db9ec823/coroutine-0.8.0/src/lib.rs:25:12
   |
25 | #![feature(fnbox)]
   |            ^^^^^

error[E0635]: unknown feature `fnbox`
  --> /_/code/.cache_rust/registry/src/github.com-1ecc6299db9ec823/coroutine-0.8.0/src/lib.rs:25:12
   |
25 | #![feature(fnbox)]
   |            ^^^^^

after adding it to toml.

[zonyitoo]

You should use Rust's builtin coroutine.