Only propagate reload errors when there are Dart frames on the stack.

runtime/observatory/tests/service/bad_reload/v2/main.dart

Index: runtime/observatory/tests/service/bad_reload/v2/main.dart
diff --git a/runtime/observatory/tests/service/bad_reload/v2/main.dart b/runtime/observatory/tests/service/bad_reload/v2/main.dart
new file mode 100644
index 0000000000000000000000000000000000000000..26172910c4df542ed25bee3c492172d8b67fe798
--- /dev/null
+++ b/runtime/observatory/tests/service/bad_reload/v2/main.dart
@@ -0,0 +1,14 @@
+// Copyright (c) 2017, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+// VMOptions=--error_on_bad_type --error_on_bad_override
+
+import 'dart:isolate';
+import 'library_isnt_here_man';
+
+test() => 'apple';
+
+main() {
+  RawReceivePort keepAlive = new RawReceivePort();
+  print('slave isolate running');
+}