[Mailman] Cron <mailman at lists> /usr/lib/mailman/cron/mailpasswds

[Cron Daemon]

Traceback (most recent call last):
  File "/usr/lib/mailman/cron/mailpasswds", line 242, in ?
    main()
  File "/usr/lib/mailman/cron/mailpasswds", line 208, in main
    header = tounicode(header, enc)
UnboundLocalError: local variable 'header' referenced before assignment