2019-04-17 13:37:26 tornado.application:ERROR Future exception was never retrieved: Traceback (most recent call last):


 "/usr/local/lib/python2.7/dist-packages/tornado/gen.py", line 307, in wrapper

result = func(*args, **kwargs)


 "/usr/local/lib/python2.7/dist-packages/thumbor/handlers/__init__.py", line 436, in finish_request

callback=inner,


 "/usr/local/lib/python2.7/dist-packages/thumbor/context.py", line 292, in queue

self._execute_in_foreground(operation, callback)


 "/usr/local/lib/python2.7/dist-packages/thumbor/context.py", line 283, in _execute_in_foreground

callback(result)


 "/usr/local/lib/python2.7/dist-packages/thumbor/handlers/__init__.py", line 429, in inner

self._write_results_to_client(results, content_type)


 "/usr/local/lib/python2.7/dist-packages/thumbor/handlers/__init__.py", line 453, in _write_results_to_client

self.set_header('Content-Type', content_type)


 "/usr/local/lib/python2.7/dist-packages/tornado/web.py", line 342, in set_header

self._headers[name] = self._convert_header_value(value)


 "/usr/local/lib/python2.7/dist-packages/tornado/web.py", line 387, in _convert_header_value

raise TypeError("Unsupported header value %r" % value)
TypeError: Unsupported header value None


Traceback (most recent call last):



 "<string>", line 1, in <module>



 "/tmp/pip-install-0hw4x1jt/twisted_a4baab3373b442278dcbb3bd8bb7e512/setup.py", line 89


print """You seem to be running a very old version of setuptools.


^


SyntaxError: Missing parentheses in call to 'print'. Did you mean print("""You seem to be running a very old version of setuptools.)?

