File: issue-77987.rs

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#![feature(type_alias_impl_trait)]

// check-pass

trait Foo<T> {}
impl<T, U> Foo<T> for U {}

type Scope = impl Foo<()>;

#[allow(unused)]
fn infer_scope() -> Scope {
    ()
}

#[allow(unused)]
fn ice() -> impl Foo<Scope>
{
    loop {}
}

fn main() {}