| //@ edition:2018 | |
| #![feature(impl_trait_in_assoc_type)] | |
| pub trait Bar { | |
| type E: Copy; | |
| fn foo<T>() -> Self::E; | |
| } | |
| impl<S> Bar for S { | |
| type E = impl std::marker::Copy; | |
| fn foo<T>() -> Self::E { | |
| //~^ ERROR : Copy` is not satisfied [E0277] | |
| async {} | |
| } | |
| } | |
| fn main() {} |