[Bug 659438] Updated

[Sebastian Heinlein]

In Precise the issue doesn't appear since there is a race between the
simulate() and the run() method which eats the exception. This race
situation has been fixed in trunk recently that hasn't been uploaded
yet.

Furthermore aptdaemon trunk now catches the exception in the
apt.cache.Cache.required_download call and lets the transaction fail
with an ERROR_INCOMPLETE_INSTALL. So we won't get any bug reports of
this anymore - although the issue isn't fixed on the lower level
(debconf/apt).

Unfortunately software-center doesn't handle the
ERROR_INCOMPLETE_INSTALL correctly yet. It just displays the error
message but doesn't offer to run the FixIncompleteInstall() method of
aptdaemon which would basically run "dpkg --configure -a" and fix the
system.

Additionally the current error message doesn't contain any hind to run
sudo dpkg --configure -a manually.

But it seems to be a first step to resolve the issue. I will try to
create a working patch for s-c in the next days.

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https://bugs.launchpad.net/bugs/659438

Title:
  Installation/Removal fails because of package which could not be
  located (failure in apt.Cache.required_download)

Status in Aptdaemon:
  Fix Committed
Status in “apt” package in Ubuntu:
  Triaged
Status in “aptdaemon” package in Ubuntu:
  Triaged
Status in “python-apt” package in Ubuntu:
  Invalid
Status in “apt” source package in Maverick:
  Confirmed
Status in “aptdaemon” source package in Maverick:
  Fix Released
Status in “python-apt” source package in Maverick:
  Invalid

Bug description:
  Steps to reproduce:

  1. Run apt-get nstall ms-ttcorefonts-installer in a terminal
  2. Close the terminal window at the EULA question (apt-get/dpkg/debconf) will sting hang in the background and lock the system)
  3. Reboot


  Traceback (most recent call last):
    File "/usr/lib/python2.6/dist-packages/aptdaemon/worker.py", line 768, in simulate
      return self._simulate_helper(trans, status_path)
    File "/usr/lib/python2.6/dist-packages/aptdaemon/worker.py", line 936, in _simulate_helper
      return depends, status, self._cache.required_download, \
    File "/usr/lib/python2.6/dist-packages/apt/cache.py", line 218, in required_download
      pm.get_archives(fetcher, self._list, self._records)
  SystemError: E:I wasn't able to locate file for the liblua50 package. This might mean you need to manually fix this package.

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