| // revisions: current next |
| //[next] compile-flags: -Znext-solver |
| //[current] check-pass |
| //[next] known-bug: trait-system-refactor-initiative#82 |
| |
| #![feature(coroutines, coroutine_trait, coroutine_clone)] |
| |
| // This stalls the goal `{coroutine} <: impl Clone`, since that has a nested goal |
| // of `{coroutine}: Clone`. That is only known if we can compute the generator |
| // witness types, which we don't know until after borrowck. When we later check |
| // the goal for correctness, we want to be able to bind the `impl Clone` opaque. |
| pub fn foo<'a, 'b>() -> impl Clone { |
| move |_: ()| { |
| let () = yield (); |
| } |
| } |
| |
| fn main() {} |
