do-release-upgrade fails libc quantal -> raring

[David Austin]

The upgrade has aborted. Your system could be in an unusable state. A
recovery will run now (dpkg --configure -a).

Please report this bug in a browser at
http://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+filebug
and attach the files in /var/log/dist-upgrade/ to the bug report.
installArchives() failed

dpkg: dependency problems prevent configuration of libudev1:amd64:
 libudev1:amd64 depends on libc6 (>= 2.17); however:
  Version of libc6:amd64 on system is 2.15-0ubuntu20.1.

dpkg: error processing libudev1:amd64 (--configure):
 dependency problems - leaving unconfigured
Errors were encountered while processing:
 libudev1:amd64

Upgrade complete

[David Austin (david-d-austin)]

Seems to be fixed by

  apt-get -f install

  The following extra packages will be installed:
    libc-dev-bin libc6 libc6:i386 libc6-dev libnih-dbus1 libnih1
  Suggested packages:
    glibc-doc glibc-doc:i386 locales:i386
  The following packages will be upgraded:
    libc-dev-bin libc6 libc6:i386 libc6-dev libnih-dbus1 libnih1
  6 upgraded, 0 newly installed, 0 to remove and 1046 not upgraded.

and then

  apt-get dist-upgrade

did lots of work - and failed with more errors.

Looks like my mdadm array stayed mounted on /mnt (fuse - not my mount) after earlier failures,
causing issues for base-files:

  Unpacking replacement base-files ...
  dpkg: error processing /var/cache/apt/archives/base-files_6.12ubuntu2_amd64.deb (--unpack):
   unable to stat `./mnt' (which I was about to install): Input/output error

Manually unmounted /mnt and then was able to complete apt-get dist-upgrade

David