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#![feature(type_alias_impl_trait)]

struct Concrete;

type Tait = impl Sized;

impl Foo for Concrete {
    type Item = Concrete;
    //~^ ERROR type mismatch resolving
}

impl Bar for Concrete {
    type Other = Tait;
}

trait Foo {
    type Item: Bar<Other = Self>;
}

trait Bar {
    type Other;
}

#[define_opaque(Tait)]
fn tait() -> Tait {}

fn main() {}