crash in removeolduploads.py from nntplib

2018-12-19 +0000 13:41:39,230 DEBUG [debexpo.lib.email] Fetching messages 37263 to 37263 on gmane.linux.debian.backports.changes
Traceback (most recent call last):
  File "/var/www/debexpo/bin/debexpo_worker.py", line 233, in <module>
    worker.run()
  File "/var/www/debexpo/bin/debexpo_worker.py", line 216, in run
    self.jobs[job]['module'].invoke()
  File "/home/expo/debexpo/debexpo/cronjobs/removeolduploads.py", line 129, in invoke
    self._remove_uploaded_packages()
  File "/home/expo/debexpo/debexpo/cronjobs/removeolduploads.py", line 98, in _remove_uploaded_packages
    for message in self.mailer.unread_messages(list_name.code, list_name.value):
  File "/home/expo/debexpo/debexpo/lib/email.py", line 204, in unread_messages
    (_, messages) = self.nntp.xover(str(changed_since), str(last))
  File "/usr/lib/python2.7/nntplib.py", line 487, in xover
    resp, lines = self.longcmd('XOVER ' + start + '-' + end, file)
  File "/usr/lib/python2.7/nntplib.py", line 273, in longcmd
    return self.getlongresp(file)
  File "/usr/lib/python2.7/nntplib.py", line 244, in getlongresp
    resp = self.getresp()
  File "/usr/lib/python2.7/nntplib.py", line 223, in getresp
    resp = self.getline()
  File "/usr/lib/python2.7/nntplib.py", line 215, in getline
    if not line: raise EOFError
EOFError
=== Command terminated with exit status 1 (Thu Dec 20 15:02:26 2018) ===