src/test/ui/uninhabited/uninhabited-enum-cast.rs - third_party/rust - Git at Google

 enum E {}

 fn f(e: E) {
     println!("{}", (e as isize).to_string());   //~ ERROR non-primitive cast
 }

 fn main() {}
	enum E {}

	fn f(e: E) {
	println!("{}", (e as isize).to_string()); //~ ERROR non-primitive cast
	}

	fn main() {}