File: bound_reduction2.rs

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#![feature(type_alias_impl_trait)]

fn main() {}

trait TraitWithAssoc {
    type Assoc;
}

type Foo<V> = impl Trait<V>;

trait Trait<U> {}

impl<W> Trait<W> for () {}

fn foo_desugared<T: TraitWithAssoc>(_: T) -> Foo<T::Assoc> {
    //~^ ERROR non-defining opaque type use
    ()
    //~^ ERROR expected generic type parameter, found `<T as TraitWithAssoc>::Assoc`
}