Hello. This is my first report, sorry if I won't do it right.
I found a bug in cookielib, which looks like this(a traceback):

"""C:\Python31\lib\http\cookiejar.py:1586: UserWarning: http.cookiejar bug!
Traceback (most recent call last):
  File "C:\Python31\lib\http\cookiejar.py", line 1584, in make_cookies
    parse_ns_headers(ns_hdrs), request)
  File "C:\Python31\lib\http\cookiejar.py", line 1541, in _cookies_from_attrs_se
t
    cookie = self._cookie_from_cookie_tuple(tup, request)
  File "C:\Python31\lib\http\cookiejar.py", line 1460, in _cookie_from_cookie_tu
ple
    version = int(version)
ValueError: invalid literal for int() with base 10: '1.0'

  _warn_unhandled_exception()"""

Thanks for your report. Can you copy the code provoking the bug?

"""                CHttp.__init__(self,1,proxy = shared.setts.currentGoogleProxy)
                self.timeout = shared.setts.cGglHttpTimeout

                self.proxy = globShare.currentGoogleProxy[globShare.currentGoogleIndex]
                if self.proxy:
                        proxy_support = urllib.request.ProxyHandler({'http':self.proxy,'https':self.proxy,'ftp':self.proxy})
                else:
                        proxy_support = urllib.request.ProxyHandler({})
                #socket.setdefaulttimeout(30)

                        #self._cp = urllib.request.HTTPCookieProcessor(http.cookiejar.CookieJar())

                self._cj = http.cookiejar.MozillaCookieJar()
                self._opener1 = urllib.request.build_opener(proxy_support,self._cp)
..... openedUrl = self._opener1.open(req)"""

The script was a crawler that searches for pdf's on internet. One thread printed the untreated exception.

Could you provide a minimal usable script? We can’t run your excerpt to
reproduce the bug, and reproducing is the first step to debugging. I
think we’ll also need the site address, or the cookie header, or the
cookies file that provoke the bug.

This is a duplicate of issue3924