software-center crashed with AttributeError in clear_model(): 'NoneType' object has no attribute 'set_value'

[Hammad Masood]

I open Software center and closed immediately and receive this error

ProblemType: Crash
DistroRelease: Ubuntu 11.10
Package: software-center 5.0
ProcVersionSignature: Ubuntu 3.0.0-12.19-generic 3.0.4
Uname: Linux 3.0.0-12-generic i686
ApportVersion: 1.23-0ubuntu2
Architecture: i386
Date: Fri Sep 30 16:51:02 2011
ExecutablePath: /usr/share/software-center/software-center
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release i386 (20110427.1)
InterpreterPath: /usr/bin/python2.7
PackageArchitecture: all
ProcCmdline: /usr/bin/python /usr/bin/software-center
PythonArgs: ['/usr/bin/software-center']
SourcePackage: software-center
Title: software-center crashed with AttributeError in clear_model(): 'NoneType' object has no attribute 'set_value'
UpgradeStatus: Upgraded to oneiric on 2011-09-28 (1 days ago)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare

[Launchpad Janitor (janitor)]

This bug was fixed in the package software-center - 5.0.1

---------------
software-center (5.0.1) oneiric; urgency=low

  [ Michael Vogt ]
  * softwarecenter/ui/gtk3/widgets/reviews.py:
    - Fix i18n bug in the error string for the reviews. This
      adds two new strings for a rare error message in the UI that
      was previously not translatable. Thanks to David Planella
  * softwarecenter/db/database.py:
    - when adding a new database (e.g. on reinstall-previous purchases)
      trigger a "reopen" to ensure that the db docids are reinitialized
  * apt-xapian-index-plugin/software-center.py:
    - do not crash if a apt.Package.candidate has no url (LP: #819907)
  * softwarecenter/ui/gtk3/views/catview_gtk.py:
    - only show the frame with new apps if we actually have information
      about new applications (LP: #862382)

  [ Robert Roth ]
  * softwarecenter/ui/gtk3/widgets/apptreeview.py:
    - fix crash in clear_model() (LP: #863233)

  [ Gary Lasker ]
  * debian/control:
    - add dependency on python-gobject-cairo to prevent crash
      at startup (LP: #829067)
  * softwarecenter/db/application.py,
    softwarecenter/db/update.py,
    softwarecenter/distro/Ubuntu.py,
    softwarecenter/enums.py:
    - display the correct license type for commercial apps as
      specified via the software-center-agent (LP: #864706)

  [ Matthew McGowan ]
  * lp:~mmcg069/software-center/bug855666:
    - add missing linewrap (LP: #855666)
  * lp:~mmcg069/software-center/bug858639 :
    - fix crash when data can not be parsed from the remote reviews server
      LP: #858639
 -- Michael Vogt <email address hidden> Wed, 05 Oct 2011 11:24:05 +0200