error: implementation of `Y` is not general enough
  --> $DIR/impl-fn-ignore-binder-via-bottom.rs:30:14
   |
LL |     let _x = <fn(&())>::make_f();
   |              ^^^^^^^^^^^^^^^^^^^ implementation of `Y` is not general enough
   |
   = note: `Y` would have to be implemented for the type `for<'a> fn(&'a ())`
   = note: ...but `Y` is actually implemented for the type `fn(&'0 ())`, for some specific lifetime `'0`

error: implementation of `Y` is not general enough
  --> $DIR/impl-fn-ignore-binder-via-bottom.rs:30:14
   |
LL |     let _x = <fn(&())>::make_f();
   |              ^^^^^^^^^^^^^^^^^^^ implementation of `Y` is not general enough
   |
   = note: `Y` would have to be implemented for the type `for<'a> fn(&'a ())`
   = note: ...but `Y` is actually implemented for the type `fn(&'0 ())`, for some specific lifetime `'0`

error: implementation of `Y` is not general enough
  --> $DIR/impl-fn-ignore-binder-via-bottom.rs:30:14
   |
LL |     let _x = <fn(&())>::make_f();
   |              ^^^^^^^^^^^^^^^^^^^ implementation of `Y` is not general enough
   |
   = note: `Y` would have to be implemented for the type `for<'a> fn(&'a ())`
   = note: ...but `Y` is actually implemented for the type `fn(&'0 ())`, for some specific lifetime `'0`

error: aborting due to 3 previous errors