tests/ui/parser/pat-tuple-1.rs - third_party/rust - Git at Google

 fn main() {
     match (0, 1) {
         (, ..) => {} //~ ERROR expected pattern, found `,`
     }
 }
	fn main() {
	match (0, 1) {
	(, ..) => {} //~ ERROR expected pattern, found `,`
	}
	}