rust/tests/ui/implied-bounds/implied-bounds-entailment-wf-vars-issue-114783-1.rs

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//@ check-pass
pub trait Foo {
type Error: Error;
fn foo(&self, stream: &<Self::Error as Error>::Span);
}
pub struct Wrapper<Inner>(Inner);
impl<E: Error, Inner> Foo for Wrapper<Inner>
where
Inner: Foo<Error = E>,
{
type Error = E;
fn foo(&self, stream: &<Self::Error as Error>::Span) {
todo!()
}
}
pub trait Error {
type Span;
}
fn main() {}