backend_helper.py crashed with Depends in _run(): python3-distupgrade (= 1:0.165) but it is not installed

[col reilly]

tried a cli update via apt.
error happened. tried it via the gui. following error:

The following packages have unmet dependencies:
python3-update-manager: Depends: python3-distupgrade but it is not installed
ubuntu-release-upgrader-core: Depends: python3-distupgrade (= 1:0.165) but it is not installed
ubuntu-release-upgrader-gtk: Depends: ubuntu-release-upgrader-core (= 1:0.165) but 1:0.165 is installed
Depends: python3-distupgrade (= 1:0.165) but it is not installed

apt-get install -f seems to fix it

ProblemType: Crash
DistroRelease: Ubuntu 12.10
Package: update-notifier-common 0.119ubuntu15
ProcVersionSignature: Ubuntu 3.5.0-2.2-generic 3.5.0-rc4
Uname: Linux 3.5.0-2-generic x86_64
ApportVersion: 2.2.5-0ubuntu1
Architecture: amd64
Date: Mon Jul 2 19:56:09 2012
ExecutablePath: /usr/lib/update-notifier/backend_helper.py
InstallationMedia: Xubuntu 12.10 "Quantal Quetzal" - Alpha amd64 (20120620)
InterpreterPath: /usr/bin/python2.7
PackageArchitecture: all
ProcCmdline: /usr/bin/python /usr/lib/update-notifier/backend_helper.py install_all_updates
ProcEnviron:
 LANGUAGE=en_GB:en
 PATH=(custom, no user)
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
PythonArgs: ['/usr/lib/update-notifier/backend_helper.py', 'install_all_updates']
SourcePackage: update-notifier
Title: backend_helper.py crashed with Depends in _run(): python3-distupgrade (= 1:0.165) but it is not installed
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Paul White (paulw2u)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. We are sorry that we do not always have the capacity to review all reported bugs in a timely manner.

Ubuntu 12.10 (quantal) reached end-of-life on May 16, 2014.

I'm setting the status of this bug to 'Incomplete' as it's not seen any activity for some time. If this is still an issue when using a currently maintained release of Ubuntu then please let us know which one(s) otherwise this bug report can be left to expire in approximately 60 days time.

[Launchpad Janitor (janitor)]

[Expired for update-notifier (Ubuntu) because there has been no activity for 60 days.]