grab can't load valid cookiefile about grab HOT 5 CLOSED

>>> g=Grab(cookiefile='/tmp/jar')
>>> g.go('http://google.com')
Traceback (most recent call last):
  File "<input>", line 1, in <module>
  File "grab/base.py", line 381, in go
    return self.request(url=url, **kwargs)
  File "grab/base.py", line 449, in request
    self.prepare_request(**kwargs)
  File "grab/base.py", line 409, in prepare_request
    self.transport.process_config(self)
  File "grab/transport/curl.py", line 306, in process_config
    self.process_cookie_options(grab, request_url)
  File "grab/transport/curl.py", line 384, in process_cookie_options
    self.curl.setopt(pycurl.COOKIELIST, b'Set-Cookie: ' + encoded + tail)
TypeError: invalid arguments to setopt
>>> import grab
>>> grab.version_info
(0, 4, 13)