return self._subs_tree() == other File "/usr/local/lib/python2.7/site-packages/typing.py", line 831, in __eq__ return self._subs_tree() == other File "/usr/local/lib/python2.7/site-packages/typing.py", line 831, in __eq__ return self._subs_tree() == other File "/usr/local/lib/python2.7/site-packages/typing.py", line 831, in __eq__ return self._subs_tree() == other RuntimeError: maximum recursion depth exceeded while calling a Python object ERROR: Build failed: exit code 1