Add crashing bug for issue 9602.

tests/language/issue9602_test.dart

Index: tests/language/issue9602_test.dart
diff --git a/tests/language/private_selector_test.dart b/tests/language/issue9602_test.dart
similarity index 61%
copy from tests/language/private_selector_test.dart
copy to tests/language/issue9602_test.dart
index 53dca839f573e49af123c18824b063bb9a3ee64d..88ef87af0aca6dd3faa9e2eaa6537b8c7b7fd752 100644
--- a/tests/language/private_selector_test.dart
+++ b/tests/language/issue9602_test.dart
@@ -2,14 +2,13 @@
 // 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.
 
-library private_selector_test;
+// Regression test case for http://dartbug.com/9602
+library issue9602;
+import 'issue9602_other.dart';
 
-import 'private_selector_lib.dart';
-
-class B extends A {
+class C extends Object with M {
 }
 
 main() {
-  new A().public();
-  Expect.isTrue(executed);
+  new C();
 }