error[E0061]: this function takes 1 parameter but 2 parameters were supplied
  --> $DIR/issue-4935.rs:15:17
   |
13 | fn foo(a: usize) {}
   | ------------------- defined here
14 | //~^ defined here
15 | fn main() { foo(5, 6) }
   |                 ^^^^ expected 1 parameter

error: aborting due to previous error