// issue: 114145 #![feature(return_position_impl_trait_in_trait)] trait Iterable { type Item<'a> where Self: 'a; fn iter(&self) -> impl '_ + Iterator>; } impl<'a, I: 'a + Iterable> Iterable for &'a I { type Item<'b> = I::Item<'a> where 'b: 'a; //~^ ERROR impl has stricter requirements than trait fn iter(&self) -> impl 'a + Iterator> { (*self).iter() } } fn main() {}