B2 tqdm error

gistfile1.txt

Traceback (most recent call last):
  File "./b2", line 1993, in <module>
    main()
  File "./b2", line 1979, in main
    ct.upload_file(args)
  File "./b2", line 1708, in upload_file
    quiet=quiet,
  File "./b2", line 594, in upload_file
    response = post_file(upload_url, headers, local_file, progress_bar=not quiet,)
  File "./b2", line 1425, in post_file
    with OpenUrl(url, data_file, headers) as response_file:
  File "./b2", line 1294, in __enter__
    self.file = urllib2.urlopen(request)
  File "/usr/local/Cellar/python/2.7.11/Frameworks/Python.framework/Versions/2.7/lib/python2.7/urllib2.py", line 154, in urlopen
    return opener.open(url, data, timeout)
  File "/usr/local/Cellar/python/2.7.11/Frameworks/Python.framework/Versions/2.7/lib/python2.7/urllib2.py", line 431, in open
    response = self._open(req, data)
  File "/usr/local/Cellar/python/2.7.11/Frameworks/Python.framework/Versions/2.7/lib/python2.7/urllib2.py", line 449, in _open
    '_open', req)
  File "/usr/local/Cellar/python/2.7.11/Frameworks/Python.framework/Versions/2.7/lib/python2.7/urllib2.py", line 409, in _call_chain
    result = func(*args)
  File "/usr/local/Cellar/python/2.7.11/Frameworks/Python.framework/Versions/2.7/lib/python2.7/urllib2.py", line 1240, in https_open
    context=self._context)
  File "/usr/local/Cellar/python/2.7.11/Frameworks/Python.framework/Versions/2.7/lib/python2.7/urllib2.py", line 1194, in do_open
    h.request(req.get_method(), req.get_selector(), req.data, headers)
  File "/usr/local/Cellar/python/2.7.11/Frameworks/Python.framework/Versions/2.7/lib/python2.7/httplib.py", line 1057, in request
    self._send_request(method, url, body, headers)
  File "/usr/local/Cellar/python/2.7.11/Frameworks/Python.framework/Versions/2.7/lib/python2.7/httplib.py", line 1097, in _send_request
    self.endheaders(body)
  File "/usr/local/Cellar/python/2.7.11/Frameworks/Python.framework/Versions/2.7/lib/python2.7/httplib.py", line 1053, in endheaders
    self._send_output(message_body)
  File "/usr/local/Cellar/python/2.7.11/Frameworks/Python.framework/Versions/2.7/lib/python2.7/httplib.py", line 901, in _send_output
    self.send(message_body)
  File "/usr/local/Cellar/python/2.7.11/Frameworks/Python.framework/Versions/2.7/lib/python2.7/httplib.py", line 871, in send
    datablock = data.read(blocksize)
  File "./b2", line 1407, in read
    self.update(len(data))
  File "/Users/bfindlay/.virtualenvs/tqdm/lib/python2.7/site-packages/tqdm/_tqdm.py", line 534, in update
    raise ValueError("n ({0}) cannot be less than 1".format(n))
ValueError: n (0) cannot be less than 1