src/test/ui/trait-method-number-parameters.rs

   1 trait Foo {
   2     fn foo(&mut self, x: i32, y: i32) -> i32;
   3 }
   4
   5 impl Foo for i32 {
   6     fn foo(
   7         &mut self, //~ ERROR
   8         x: i32,
   9     ) {
  10     }
  11 }
  12
  13 fn main() {}