error[E0057]: this function takes 2 arguments but 1 argument was supplied
  --> $DIR/issue-98897.rs:2:5
   |
LL |     (|_, ()| ())([return, ()]);
   |     ^^^^^^^^^^^^-------------- an argument of type `()` is missing
   |
note: closure defined here
  --> $DIR/issue-98897.rs:2:6
   |
LL |     (|_, ()| ())([return, ()]);
   |      ^^^^^^^
help: provide the argument
   |
LL |     (|_, ()| ())([return, ()], ());
   |                 ~~~~~~~~~~~~~~~~~~

error: aborting due to 1 previous error

For more information about this error, try `rustc --explain E0057`.