error: parameter defaults are not supported
  --> $DIR/param-default.rs:1:15
   |
LL | fn foo(x: i32 = 1) {}
   |               ^^^

error: parameter defaults are not supported
  --> $DIR/param-default.rs:3:19
   |
LL | type Foo = fn(i32 = 0);
   |                   ^^^

error: aborting due to 2 previous errors