Comment 41 for bug 147429

This is a me-too.

After a half-dozen packages upgraded (including libc6):
  Could not install 'debconf'
  subprocess post-installation script killed by signal (Segmentation fault), core dumped
  (saw prior mention of "perl stack squashed")

Continuing the upgrade fails on each additional package. Went through roughly four,
including xorg, then the installer hangs.

Workaround:

kill adept process (running in python interpreter)
# dpkg --configure -a
# apt-get dist-upgrade
# apt-get -f dist-upgrade

Nothing unusual was removed as a result of the -f upgrade, so it looks and
works like a clean gutsy system once those commands complete (1077 packages
are installed).

I really wish I found this bug before I clicked to upgrade my distribution though.

from kubuntu/gutsy,
-edfardos