Comment 5 for bug 1799097

Exception caught in process_line:
Traceback (most recent call last):
  File "/usr/lib/ubiquity/ubiquity/filteredcommand.py", line 145, in process_line
    return self.dbfilter.process_line()
  File "/usr/lib/ubiquity/ubiquity/debconffilter.py", line 343, in process_line
    progress_title)
  File "/usr/lib/ubiquity/ubiquity/filteredcommand.py", line 440, in progress_start
    progress_min, progress_max, self.description(progress_title))
  File "/usr/lib/ubiquity/ubiquity/filteredcommand.py", line 324, in description
    return misc.utf8(self.db.metaget(question, 'description'),
  File "/usr/lib/python3/dist-packages/debconf.py", line 83, in <lambda>
    lambda *args, **kw: self.command(command, *args, **kw))
  File "/usr/lib/python3/dist-packages/debconf.py", line 87, in command
    self.write.write("%s %s\n" % (command, ' '.join(map(str, params))))
ValueError: I/O operation on closed file.