src/test/ui/parser/pat-tuple-3.rs - third_party/rust - Git at Google

 fn main() {
     match 0 {
         (.., pat, ..) => {} //~ ERROR `..` can only be used once per tuple or tuple struct pattern
     }
 }
	fn main() {
	match 0 {
	(.., pat, ..) => {} //~ ERROR `..` can only be used once per tuple or tuple struct pattern
	}
	}