Traceback (most recent call last):


 "…/Vcs/otree-core-private/.venv/bin/tox", line 11, in <module>

load_entry_point('tox', 'console_scripts', 'tox')()


 "…/Vcs/tox/src/tox/session/__init__.py", line 44, in cmdline

main(args)


 "…/Vcs/tox/src/tox/session/__init__.py", line 68, in main

exit_code = session.runcommand()


 "…/Vcs/tox/src/tox/session/__init__.py", line 187, in runcommand

self.showenvs(all_envs=False, description=show_description)


 "…/Vcs/tox/src/tox/session/__init__.py", line 291, in showenvs

show_envs(self.config, all_envs=all_envs, description=description)


 "…/Vcs/tox/src/tox/session/commands/show_env.py", line 14, in show_envs

max_length = max(len(env) for env in (default + extra))
ValueError: max() arg is an empty sequence


Traceback (most recent call last):

 "/home/travis/build/GoogleCloudPlatform/gcloud-python/system_tests/storage.py", line 181, in test_copy_existing_file
new_blob = self.bucket.copy_blob(blob, self.bucket, 'CloudLogoCopy')

 "/home/travis/build/GoogleCloudPlatform/gcloud-python/.tox/system-tests/lib/python2.7/site-packages/gcloud/storage/bucket.py", line 460, in copy_blob
method='POST', path=api_path, _target_object=new_blob)

 "/home/travis/build/GoogleCloudPlatform/gcloud-python/.tox/system-tests/lib/python2.7/site-packages/gcloud/connection.py", line 337, in api_request
error_info=method + ' ' + url)

 "/home/travis/build/GoogleCloudPlatform/gcloud-python/.tox/system-tests/lib/python2.7/site-packages/gcloud/exceptions.py", line 185, in make_exception
payload = json.loads(content)

 "/opt/python/2.7.9/lib/python2.7/json/__init__.py", line 338, in loads
return _default_decoder.decode(s)

 "/opt/python/2.7.9/lib/python2.7/json/decoder.py", line 366, in decode
obj, end = self.raw_decode(s, idx=_w(s, 0).end())

 "/opt/python/2.7.9/lib/python2.7/json/decoder.py", line 384, in raw_decode
raise ValueError("No JSON object could be decoded")
ValueError: No JSON object could be decoded