function* foo() {
  var a = yield wat(),
      b = 2;
  var c = yield a = b;
  yield a, yield b;
  yield a = b;
  return yield 1 || yield 2;
}

@@ -118,26 +118,30 @@
 urn 
+(
 yield 1
+)
  %7C%7C 
+(
 yield 2
+)
 ;%0A%7D%0A

Fix failing test