src/test/ui/impl-trait/issue-57201.stderr

error: lifetimes in impl Trait types in bindings are not currently supported
  --> $DIR/issue-57201.rs:11:13
   |
LL |     let f: &impl Fn(&'a T) -> &'b T = &|x| x;
   |             ^^^^^^^^^^^^^^^^^^^^^^^

error: aborting due to previous error