tests/ui/parser/match-arrows-block-then-binop.rs - toolchain/rustc - Git at Google

 fn main() {
     let _ = match 0 {
       0 => {
         0
       } + 5 //~ ERROR expected pattern, found `+`
     };
 }
	fn main() {
	let _ = match 0 {
	0 => {
	0
	} + 5 //~ ERROR expected pattern, found `+`
	};
	}