[Bug 912626] Re: software-properties-gtk crashed with AttributeError in on_treeview_sources_cursor_changed(): 'NoneType' object has no attribute 'get_selected'

[Apport retracing service]

*** This bug is a duplicate of bug 911834 ***
    https://bugs.launchpad.net/bugs/911834

Thank you for taking the time to report this crash and helping to make
this software better.  This particular crash has already been reported
and is a duplicate of bug #911834, so is being marked as such.  Please
look at the other bug report to see if there is any missing information
that you can provide, or to see if there is a workaround for the bug.
Additionally, any further discussion regarding the bug should occur in
the other report.  Please continue to report any other bugs you may
find.

** Tags removed: need-duplicate-check

** Attachment removed: "Dependencies.txt"
   https://bugs.launchpad.net/bugs/912626/+attachment/2659535/+files/Dependencies.txt

** Attachment removed: "ProcStatus.txt"
   https://bugs.launchpad.net/bugs/912626/+attachment/2659537/+files/ProcStatus.txt

** Visibility changed to: Public

** This bug has been marked a duplicate of private bug 911834

** Visibility changed to: Public

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https://bugs.launchpad.net/bugs/912626

Title:
  software-properties-gtk crashed with AttributeError in
  on_treeview_sources_cursor_changed(): 'NoneType' object has no
  attribute 'get_selected'

Status in “software-properties” package in Ubuntu:
  New

Bug description:
  I opened Software Sources from System Settings and this crash popped
  up.

  ProblemType: Crash
  DistroRelease: Ubuntu 12.04
  Package: software-properties-gtk 0.82
  ProcVersionSignature: Ubuntu 3.2.0-7.13-generic 3.2.0-rc7
  Uname: Linux 3.2.0-7-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 1.90-0ubuntu1
  Architecture: amd64
  Date: Thu Jan  5 21:56:20 2012
  DuplicateOf: https://bugs.launchpad.net/bugs/911834
  ExecutablePath: /usr/bin/software-properties-gtk
  InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Alpha amd64 (20120104)
  InterpreterPath: /usr/bin/python2.7
  PackageArchitecture: all
  ProcCmdline: /usr/bin/python /usr/bin/software-properties-gtk
  ProcEnviron:
   SHELL=/bin/bash
   PATH=(custom, no user)
   LANG=en_US.UTF-8
  PythonArgs: ['/usr/bin/software-properties-gtk']
  SourcePackage: software-properties
  Title: software-properties-gtk crashed with AttributeError in on_treeview_sources_cursor_changed(): 'NoneType' object has no attribute 'get_selected'
  Traceback:
   Traceback (most recent call last):
     File "/usr/lib/python2.7/dist-packages/softwareproperties/gtk/SoftwarePropertiesGtk.py", line 820, in on_treeview_sources_cursor_changed
       (model, iter) = sel.get_selected()
   AttributeError: 'NoneType' object has no attribute 'get_selected'
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo

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