cbworkloadgen against non-default buckets throws parsing error

./cbworkloadgen -n 10.3.2.41:8091 -b bucket-0 -p password -r 100

Traceback (most recent call last):
File "/usr/lib64/python2.4/threading.py", line 442, in __bootstrap
self.run()
File "/usr/lib64/python2.4/threading.py", line 422, in run
self._target(*self.args, **self._kwargs)
File "/opt/couchbase/lib/python/couchbase/couchbaseclient.py", line 713, in _start_streaming
response = urlopener.open("http://%s:%s/pools/default/bucketsS"
File "/usr/lib64/python2.4/urllib.py", line 190, in open
return getattr(self, name)(url)
File "/usr/lib64/python2.4/urllib.py", line 322, in open_http
return self.http_error(url, fp, errcode, errmsg, headers)
File "/usr/lib64/python2.4/urllib.py", line 335, in http_error
result = method(url, fp, errcode, errmsg, headers)
File "/usr/lib64/python2.4/urllib.py", line 656, in http_error_401
return getattr(self,name)(url, realm)
File "/usr/lib64/python2.4/urllib.py", line 664, in retry_http_basic_auth
user, passwd = self.get_user_passwd(host, realm, i)
File "/usr/lib64/python2.4/urllib.py", line 690, in get_user_passwd
user, passwd = self.prompt_user_passwd(host, realm)
TypeError: <lambda>() takes no arguments (2 given)