Precise to Quantal upgrade failed: do-release-upgrade -d failed with ImportError: No module named janitor.plugincore.manager in DistUpgradeQuirks.py

This also happens with it's graphical brother:
update-manager -d

This bug was fixed in the package ubuntu-release-upgrader - 1:0.166

---------------
ubuntu-release-upgrader (1:0.166) quantal; urgency=low

  * Fix release upgrade tarball to include some UpdateManager that it
    may need during upgrade. LP: #1020462
 -- Michael Terry <email address hidden> Fri, 06 Jul 2012 09:25:03 -0400

Tried to upgrade (the gpg is at this time available) but encounter with other error. The bug report:
https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1021778

Bug still present on ubuntu-release-upgrader-core 1:0.170ubuntu1

Guy, can you double check that with latest ubuntu-release-upgrader and report a new bug if there is still a problem?

It now starts with today's build, will report back when it finishes upgrade.

On Mon, Jul 23, 2012 at 1:46 PM, Michael Terry
<email address hidden>wrote:

> Guy, can you double check that with latest ubuntu-release-upgrader and
> report a new bug if there is still a problem?
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1020462
>
> Title:
> Precise to Quantal upgrade failed: do-release-upgrade -d failed with
> ImportError: No module named janitor.plugincore.manager in
> DistUpgradeQuirks.py
>
> Status in “ubuntu-release-upgrader” package in Ubuntu:
> Fix Released
> Status in “ubuntu-release-upgrader” source package in Quantal:
> Fix Released
>
> Bug description:
> Automated desktop upgrade test from Precise to Quantal failed in
> Jenkins, it crashes when upgrding from the command line with: do-
> release-upgrade -d
>
> Link to failed build:
>
> https://jenkins.qa.ubuntu.com/view/Quantal/view/All%20Quantal/job/quantal-upgrade-precise-desktop/ARCH=i386,LTS=non-lts,PROFILE=desktop,label=upgrade-test/51/
>
> Findings in log file of the test(refer to comment #1 for detail) :
> .......
> .......
> Get:2 Upgrade tool [1,128 kB]
>
> 2% 4,636 B/s 3min 57s
> 100% [Working] 4,636 B/s 0s
> Fetched 1,128 kB in 6s (4,636 B/s)
> authenticate 'quantal.tar.gz' against 'quantal.tar.gz.gpg'
> extracting 'quantal.tar.gz'
> Traceback (most recent call last):
> File "/tmp/update-manager-yKyOGK/quantal", line 6, in <module>
> from DistUpgrade.DistUpgradeMain import main
> File "/tmp/update-manager-yKyOGK/DistUpgrade/DistUpgradeMain.py", line
> 56, in <module>
> from .DistUpgradeController import DistUpgradeController
> File
> "/tmp/update-manager-yKyOGK/DistUpgrade/DistUpgradeController.py", line 65,
> in <module>
> from .DistUpgradeQuirks import DistUpgradeQuirks
> File "/tmp/update-manager-yKyOGK/DistUpgrade/DistUpgradeQuirks.py",
> line 40, in <module>
> from janitor.plugincore.manager import PluginManager
> ImportError: No module named janitor.plugincore.manager
> scp: /var/log/dist-upgrade/*: No such file or directory
>
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>