>         self.assertIn('contained a cycle', pants_run.stderr_data)
                     E         AssertionError: u'contained a cycle' not found in u'.INFO] killing nailgun server pid=81937\nException caught: (<class \'pants.build_graph.build_graph.CycleException\'>)\n  File "/Users/peiyu/github/pants/src/python/pants/bin/pants_exe.py", line 50, in <module>\n    main()\n