1 error[E0207]: the lifetime parameter `'a` is not constrained by the impl trait, self type, or predicates
2 --> $DIR/assoc-type-lifetime-unconstrained.rs:20:6
4 LL | impl<'a, I> UnwrapItemsExt for I {
5 | ^^ unconstrained lifetime parameter
7 error: aborting due to previous error
9 For more information about this error, try `rustc --explain E0207`.