Handle synthetic nodes use to throw exceptions

pkg/compiler/lib/src/js_backend/backend.dart

Index: pkg/compiler/lib/src/js_backend/backend.dart
diff --git a/pkg/compiler/lib/src/js_backend/backend.dart b/pkg/compiler/lib/src/js_backend/backend.dart
index c4d156b6fff79f526518e27ab4964ba7a696a188..811096b1c8c3555b1044be11b568b4606a5acd15 100644
--- a/pkg/compiler/lib/src/js_backend/backend.dart
+++ b/pkg/compiler/lib/src/js_backend/backend.dart
@@ -748,6 +748,10 @@ class JavaScriptBackend extends Backend {
         element == coreClasses.stringClass) {
       // TODO(johnniwinther): Avoid these.
       return true;
+    } else if (element == helpers.genericNoSuchMethod ||
+        element == helpers.unresolvedConstructorError ||
+        element == helpers.malformedTypeError) {
+      return true;
     }
     return false;
   }