error[E0580]: `main` function has wrong type
  --> $DIR/auxiliary/bad_main_functions.rs:1:1
   |
LL | pub fn boilerplate(x: u8) {}
   | ^^^^^^^^^^^^^^^^^^^^^^^^^ incorrect number of function parameters
   |
   = note: expected signature `fn()`
              found signature `fn(u8)`

error: aborting due to previous error

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