tests/ui/type-alias-impl-trait/issue-68368-non-defining-use.rs


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// Regression test for issue #68368
// Ensures that we don't ICE when emitting an error
// for a non-defining use when lifetimes are involved

#![feature(type_alias_impl_trait)]
trait Trait<T> {}
type Alias<'a, U> = impl Trait<U>;

#[define_opaque(Alias)]
fn f<'a>() -> Alias<'a, ()> {}
//~^ ERROR expected generic type parameter, found `()`

fn main() {}

impl Trait<()> for () {}