rust/tests/ui/coherence/coherence-inherited-assoc-t...

25 lines
576 B
Rust

// Formerly this ICEd with the following message:
// Tried to project an inherited associated type during coherence checking,
// which is currently not supported.
//
// No we expect to run into a more user-friendly cycle error instead.
#![feature(specialization)]
//~^ WARN the feature `specialization` is incomplete
trait Trait<T> { type Assoc; }
//~^ ERROR E0391
impl<T> Trait<T> for Vec<T> {
type Assoc = ();
}
impl Trait<u8> for Vec<u8> {}
impl<T> Trait<T> for String {
type Assoc = ();
}
impl Trait<<Vec<u8> as Trait<u8>>::Assoc> for String {}
fn main() {}