Comment 2 for bug 755600

Happened just now too while removing a library. Maybe because of removing several files at once:

Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/apt/cache.py", line 441, in install_archives
    install_progress.startUpdate()
AttributeError: 'DaemonInstallProgress' object has no attribute 'startUpdate'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/aptdaemon/worker.py", line 332, in _process_transaction
    self.commit_packages(trans, *trans.packages)
  File "/usr/lib/python3/dist-packages/aptdaemon/worker.py", line 394, in commit_packages
    self._apply_changes(trans)
  File "/usr/lib/python3/dist-packages/aptdaemon/pkcompat.py", line 2900, in _apply_changes
    install_range)
  File "/usr/lib/python3/dist-packages/aptdaemon/worker.py", line 1132, in _apply_changes
    self._cache.commit(fetch_progress, inst_progress)
  File "/usr/lib/python3/dist-packages/apt/cache.py", line 481, in commit
    res = self.install_archives(pm, install_progress)
  File "/usr/lib/python3/dist-packages/apt/cache.py", line 443, in install_archives
    install_progress.start_update()
  File "/usr/lib/python3/dist-packages/aptdaemon/progress.py", line 640, in start_update
    lock.status_lock.release()
  File "/usr/lib/python3/dist-packages/aptdaemon/lock.py", line 83, in release
    os.close(self.fd)
OSError: [Errno 9] Bad file descriptor