1 error[E0207]: the lifetime parameter `'a` is not constrained by the impl trait, self type, or predicates
2 --> $DIR/impl-unused-rps-in-assoc-type.rs:21:6
4 21 | impl<'a> Fun for Holder { //~ ERROR E0207
5 | ^^ unconstrained lifetime parameter
7 error: aborting due to previous error