[Bug 1121171] Re: update-manager crashed with AttributeError in update(): 'NoneType' object has no attribute 'saveDistUpgrade'

[Steve Langasek]

I encountered an update-manager failure, and apport redirected me to
this bug.  It had nothing to do with a kernel panic.  update-manager was
interrupted (hard) mid-upgrade, and I had to 'dpkg --configure -a' to
clean up after the interrupt; after that, update-manager started
normally on the second time, either because of the dpkg cleanup or
because of its own cache cleaning.

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https://bugs.launchpad.net/bugs/1121171

Title:
  update-manager crashed with AttributeError in update(): 'NoneType'
  object has no attribute 'saveDistUpgrade'

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

Bug description:
  Total kernel panic when trying to do latest update to system.
  Total system failure.

  ProblemType: Crash
  DistroRelease: Ubuntu 13.04
  Package: update-manager 1:0.181
  ProcVersionSignature: Ubuntu 3.8.0-2.6-generic 3.8.0-rc4
  Uname: Linux 3.8.0-2-generic x86_64
  ApportVersion: 2.8-0ubuntu4
  Aptdaemon:
   
  Architecture: amd64
  Date: Sun Feb 10 08:02:53 2013
  ExecutablePath: /usr/bin/update-manager
  GsettingsChanges:
   b'com.ubuntu.update-manager' b'first-run' b'false'
   b'com.ubuntu.update-manager' b'launch-time' b'1360504947'
   b'com.ubuntu.update-manager' b'show-details' b'true'
   b'com.ubuntu.update-manager' b'window-height' b'315'
   b'com.ubuntu.update-manager' b'window-width' b'640'
  InstallationDate: Installed on 2012-10-23 (109 days ago)
  InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121017.5)
  InterpreterPath: /usr/bin/python3.3
  MarkForUpload: True
  PackageArchitecture: all
  ProcCmdline: /usr/bin/python3 /usr/bin/update-manager --no-update --no-focus-on-map
  ProcEnviron:
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  PythonArgs: ['/usr/bin/update-manager', '--no-update', '--no-focus-on-map']
  SourcePackage: update-manager
  Title: update-manager crashed with AttributeError in update(): 'NoneType' object has no attribute 'saveDistUpgrade'
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo

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