error[E0580]: main function has wrong type
  --> $DIR/bad-main.rs:11:1
   |
LL | fn main(x: isize) { } //~ ERROR: main function has wrong type [E0580]
   | ^^^^^^^^^^^^^^^^^ incorrect number of function parameters
   |
   = note: expected type `fn()`
              found type `fn(isize)`

error: aborting due to previous error

For more information about this error, try `rustc --explain E0580`.