More equivalence testing

tests/compiler/dart2js/equivalence/check_helpers.dart

Index: tests/compiler/dart2js/equivalence/check_helpers.dart
diff --git a/tests/compiler/dart2js/equivalence/check_helpers.dart b/tests/compiler/dart2js/equivalence/check_helpers.dart
index 4983620b3f37cdb3768b8c6bc1494c0a1606bdf1..f1af1f9a9ba3c19be35241f631692c72fac5b277 100644
--- a/tests/compiler/dart2js/equivalence/check_helpers.dart
+++ b/tests/compiler/dart2js/equivalence/check_helpers.dart
@@ -406,7 +406,7 @@ void checkLists(
     sb.write("\n Extra: \n  ${extra.map(elementToString).join('\n  ')}");
   }
   String message = sb.toString();
-  if (mismatch.isNotEmpty) {
+  if (mismatch.isNotEmpty || unfound.isNotEmpty || extra.isNotEmpty) {
     Expect.fail(message);
   } else if (verbose) {
     print(message);