error[E0631]: type mismatch in closure arguments
  --> $DIR/expect-fn-supply-fn.rs:30:5
   |
LL | fn with_closure_expecting_fn_with_free_region<F>(_: F)
   |    ------------------------------------------
LL |     where F: for<'a> FnOnce(fn(&'a u32), &i32)
   |                      ------------------------- required by this bound in `with_closure_expecting_fn_with_free_region`
...
LL |     with_closure_expecting_fn_with_free_region(|x: fn(&u32), y| {});
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ---------------- found signature of `fn(for<'r> fn(&'r u32), _) -> _`
   |     |
   |     expected signature of `fn(fn(&'a u32), &i32) -> _`

error[E0631]: type mismatch in closure arguments
  --> $DIR/expect-fn-supply-fn.rs:37:5
   |
LL | fn with_closure_expecting_fn_with_bound_region<F>(_: F)
   |    -------------------------------------------
LL |     where F: FnOnce(fn(&u32), &i32)
   |              ---------------------- required by this bound in `with_closure_expecting_fn_with_bound_region`
...
LL |     with_closure_expecting_fn_with_bound_region(|x: fn(&'x u32), y| {});
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ------------------- found signature of `fn(fn(&'x u32), _) -> _`
   |     |
   |     expected signature of `fn(for<'r> fn(&'r u32), &i32) -> _`

error[E0631]: type mismatch in closure arguments
  --> $DIR/expect-fn-supply-fn.rs:46:5
   |
LL | fn with_closure_expecting_fn_with_bound_region<F>(_: F)
   |    -------------------------------------------
LL |     where F: FnOnce(fn(&u32), &i32)
   |              ---------------------- required by this bound in `with_closure_expecting_fn_with_bound_region`
...
LL |     with_closure_expecting_fn_with_bound_region(|x: Foo<'_>, y| {
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ --------------- found signature of `for<'r> fn(fn(&'r u32), _) -> _`
   |     |
   |     expected signature of `fn(for<'r> fn(&'r u32), &i32) -> _`

error: aborting due to 3 previous errors

For more information about this error, try `rustc --explain E0631`.