tests/python/pants_test/engine/exp/test_engine.py::EngineTest::test_rerun_with_cache Process Process-25:
                     Traceback (most recent call last):
                       File "/usr/lib/python2.7/multiprocessing/process.py", line 258, in _bootstrap
                         self.run()
                       File "/usr/lib/python2.7/multiprocessing/process.py", line 114, in run
                         self._target(*self._args, **self._kwargs)
                       File "/home/travis/build/pantsbuild/pants/.pants.d/python-setup/chroots/b06d768230d95db8675f2b397f5d6c843bdc341a/pants/engine/exp/processing.py", line 22, in _stateful_pool_loop
                         result = function(states, item)
                       File "/home/travis/build/pantsbuild/pants/.pants.d/python-setup/chroots/b06d768230d95db8675f2b397f5d6c843bdc341a/pants/engine/exp/engine.py", line 159, in _execute_step
                         resolved_request = storage.resolve_request(step)
                       File "/home/travis/build/pantsbuild/pants/.pants.d/python-setup/chroots/b06d768230d95db8675f2b397f5d6c843bdc341a/pants/engine/exp/storage.py", line 269, in resolve_request
                         dependencies[self._from_key(dep)] = self._from_key(state)
                       File "/home/travis/build/pantsbuild/pants/.pants.d/python-setup/chroots/b06d768230d95db8675f2b397f5d6c843bdc341a/pants/engine/exp/storage.py", line 285, in _from_key
                         return self.get(obj)
                       File "/home/travis/build/pantsbuild/pants/.pants.d/python-setup/chroots/b06d768230d95db8675f2b397f5d6c843bdc341a/pants/engine/exp/storage.py", line 210, in get
                         return self._assert_type_matches(pickle.load(value), key.type)
                     UnpicklingError: pickle data was truncated