I just noticed that this is reporducible consistently with the python
requests[1] module, if you route your request through a proxy. I was wondering
whether I should report this as a 'requests' bug or would this be the right
place to add a 'me too' ? Here's the reporducer:

[steve@localhost ~/venvs]$ mkdir requests_bug
[steve@localhost ~/venvs]$ cd requests_bug/
[steve@localhost ~/venvs/requests_bug]$ virtualenv .
New python executable in ./bin/python
Installing Setuptools..............................................................................................................................................................................................................................done.
Installing Pip.....................................................................................................................................................................................................................................................................................................................................done.
[steve@localhost ~/venvs/requests_bug]$ . bin/activate
(requests_bug)[steve@localhost ~/venvs/requests_bug]$ pip install requests
Downloading/unpacking requests
  Downloading requests-2.2.0.tar.gz (421kB): 421kB downloaded
  Running setup.py egg_info for package requests

Installing collected packages: requests
  Running setup.py install for requests

Successfully installed requests
Cleaning up...
(requests_bug)[steve@localhost ~/venvs/requests_bug]$ python
Python 2.7.5 (default, Nov 12 2013, 16:18:42)
[GCC 4.8.2 20131017 (Red Hat 4.8.2-1)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
You've got color, tab completion and pretty-printing. History will be saved
in /home/steve/.pyhistory when you exit.

Typing '\e' will open your $EDITOR with the last executed statement

>>> import requests
>>> requests.get('https://www.google.com/', verify=False)
<Response [200]>
>>> requests.get('https://www.google.com/', verify=False, proxies={'https':'https://192.168.117.157:443'})
Traceback (most recent call last):
  File "<console>", line 1, in <module>
  File "/home/steve/venvs/requests_bug/lib/python2.7/site-packages/requests/api.py", line 55, in get
    return request('get', url, **kwargs)
  File "/home/steve/venvs/requests_bug/lib/python2.7/site-packages/requests/api.py", line 44, in request
    return session.request(method=method, url=url, **kwargs)
  File "/home/steve/venvs/requests_bug/lib/python2.7/site-packages/requests/sessions.py", line 383, in request
    resp = self.send(prep, **send_kwargs)
  File "/home/steve/venvs/requests_bug/lib/python2.7/site-packages/requests/sessions.py", line 486, in send
    r = adapter.send(request, **kwargs)
  File "/home/steve/venvs/requests_bug/lib/python2.7/site-packages/requests/adapters.py", line 334, in send
    timeout=timeout
  File "/home/steve/venvs/requests_bug/lib/python2.7/site-packages/requests/packages/urllib3/connectionpool.py", line 475, in urlopen
    conn = self._get_conn(timeout=pool_timeout)
  File "/home/steve/venvs/requests_bug/lib/python2.7/site-packages/requests/packages/urllib3/connectionpool.py", line 217, in _get_conn
    return conn or self._new_conn()
  File "/home/steve/venvs/requests_bug/lib/python2.7/site-packages/requests/packages/urllib3/connectionpool.py", line 656, in _new_conn
    return self._prepare_conn(conn)
  File "/home/steve/venvs/requests_bug/lib/python2.7/site-packages/requests/packages/urllib3/connectionpool.py", line 625, in _prepare_conn
    conn.connect()
  File "/home/steve/venvs/requests_bug/lib/python2.7/site-packages/requests/packages/urllib3/connection.py", line 90, in connect
    self._tunnel()
  File "/usr/lib64/python2.7/httplib.py", line 759, in _tunnel
    line = response.fp.readline(_MAXLINE + 1)
TypeError: readline() takes exactly 1 argument (2 given)
>>>

cheers,
- steve

[1] requests-2.2.0