[Bug 1203534] Re: update-manager crashes when trying to upgrade to 13.10

[Mark Bennison]

Just to add to this, I also get a message in the terminal that says
"Real-time signal 0".

Note also that after 3 attempts to do this, it got a little further and
then crashed again. The terminal output is:

Checking for a new Ubuntu release
WARNING:root:fetch result != continue (2)
Traceback (most recent call last):
  File "/usr/bin/do-release-upgrade", line 152, in <module>
    fetcher.run()
  File "/usr/lib/python3/dist-packages/DistUpgrade/DistUpgradeFetcherCore.py", line 278, in run
    _("Fetching the upgrade failed. There may be a network "
  File "/usr/lib/python3/dist-packages/DistUpgrade/DistUpgradeFetcher.py", line 50, in error
    return error(self.window_main.window_main, summary, message)
AttributeError: 'NoneType' object has no attribute 'window_main'

Also I sent an apport error, but it didn't offer to show raise a bug,
Note sure if this is wholly related to this bug, but I am posting here
for those more knowledgeable to advise!

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https://bugs.launchpad.net/bugs/1203534

Title:
  update-manager crashes when trying to upgrade to 13.10

Status in “update-manager” package in Ubuntu:
  Confirmed

Bug description:
  The update manager segfaults when trying to upgrade from 13.04 to
  13.10.

  Steps to reproduce:
  1. $ sudo update-manager -c -d
  2. Press the 'Upgrade...' button.

  Expected result:
  Another window appears asking to confirm the upgrade.

  Actual result:
  After message on checking the availability of a new Ubuntu release I get a Segmentation fault (core dumped) message.

  ProblemType: Bug
  DistroRelease: Ubuntu 13.04
  Package: update-manager 1:0.186.1
  ProcVersionSignature: Ubuntu 3.8.0-22.33-generic 3.8.11
  Uname: Linux 3.8.0-22-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 2.9.2-0ubuntu8.3
  Architecture: amd64
  Date: Sun Jul 21 18:14:09 2013
  GsettingsChanges:
   b'com.ubuntu.update-manager' b'first-run' b'false'
   b'com.ubuntu.update-manager' b'launch-time' b'1374423191'
   b'com.ubuntu.update-manager' b'show-details' b'true'
   b'com.ubuntu.update-manager' b'window-height' b'600'
   b'com.ubuntu.update-manager' b'window-width' b'617'
  InstallationDate: Installed on 2013-05-25 (56 days ago)
  InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release amd64 (20130424)
  MarkForUpload: True
  PackageArchitecture: all
  SourcePackage: update-manager
  UpgradeStatus: No upgrade log present (probably fresh install)

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