[Mailman-Developers] Error occurs when subscribers send emails to list_name-leave

[Leon]

Hi developers.

Subscribers who sent emails to list-leave at XXX got unsubscribe confirmation
email, but they are still in the member list.

Error log of mailman:

Nov 22 02:28:50 2016 (12315) deque: do_confirm_verify
Traceback (most recent call last):
  File "/opt/mailman/git/mailman/src/mailman/app/workflow.py", line 69, in
__next__
    return step()
  File "/opt/mailman/git/mailman/src/mailman/app/subscriptions.py", line
402, in _step_send_confirmation
    raise StopIteration
StopIteration
Nov 22 02:30:03 2016 (12315) Uncaught runner exception: None
Nov 22 02:30:03 2016 (12315) Traceback (most recent call last):
  File "/opt/mailman/git/mailman/src/mailman/core/runner.py", line 159, in
_one_iteration
    self._process_one_file(msg, msgdata)
  File "/opt/mailman/git/mailman/src/mailman/core/runner.py", line 252, in
_process_one_file
    keepqueued = self._dispose(mlist, msg, msgdata)
  File "/opt/mailman/git/mailman/src/mailman/runners/command.py", line 196,
in _dispose
    mlist, msg, msgdata, parts, results)
  File "/opt/mailman/git/mailman/src/mailman/commands/eml_confirm.py", line
56, in process
    assert member is not None, member
AssertionError: None

-- 
Best wishes,
Leon