[Expired for software-center (Ubuntu) because there has been no activity
for 60 days.]

** Changed in: software-center (Ubuntu)
       Status: Incomplete => Expired

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https://bugs.launchpad.net/bugs/967048

Title:
  Crashes on startup in guest session

Status in “software-center” package in Ubuntu:
  Expired

Bug description:
  software-center 5.1.13.2, Ubuntu Pangolin

  1. Switch to a guest session.
  2. Launch USC.

  What happens: The window opens, then it crashes.

  guest-GuzJZu@mpt-MacBook:~$ software-center
  2012-03-28 12:36:31,496 - softwarecenter.ui.gtk3.app - INFO - setting up 
proxy 'None'
  2012-03-28 12:36:31,595 - softwarecenter.db.database - INFO - open() 
database: path=None use_axi=True use_agent=True
  2012-03-28 12:36:33,635 - softwarecenter.backend.reviews - WARNING - Could 
not get usefulness from server, no username in config file
  Traceback (most recent call last):
    File 
"/usr/share/software-center/softwarecenter/db/pkginfo_impl/aptcache.py", line 
242, in open
      self._cache = apt.Cache(GtkMainIterationProgress())
    File "/usr/lib/python2.7/dist-packages/apt/cache.py", line 102, in __init__
      self.open(progress)
    File "/usr/lib/python2.7/dist-packages/apt/cache.py", line 149, in open
      self._list.read_main_list()
  SystemError: E:Opening 
/etc/apt/sources.list.d/private-ppa.launchpad.net_commercial-ppa-uploaders_drumpads_ubuntu.list
 - ifstream::ifstream (13: Permission denied)
  2012-03-28 12:36:43,901 - softwarecenter.db.enquire - ERROR - 
_get_estimate_nr_apps_and_nr_pkgs failed
  Traceback (most recent call last):
    File "/usr/share/software-center/softwarecenter/db/enquire.py", line 115, 
in _get_estimate_nr_apps_and_nr_pkgs
      tmp_matches = enquire.get_mset(0, len(self.db), None, xfilter)
    File "/usr/share/software-center/softwarecenter/db/appfilter.py", line 89, 
in __call__
      if (not pkgname in self.cache and
    File 
"/usr/share/software-center/softwarecenter/db/pkginfo_impl/aptcache.py", line 
262, in __contains__
      return self._cache.__contains__(k)
  AttributeError: 'NoneType' object has no attribute '__contains__'
  Traceback (most recent call last):
    File "/usr/bin/software-center", line 176, in <module>
      app.run(args)
    File "/usr/share/software-center/softwarecenter/ui/gtk3/app.py", line 1342, 
in run
      self.show_available_packages(args)
    File "/usr/share/software-center/softwarecenter/ui/gtk3/app.py", line 1271, 
in show_available_packages
      self.view_manager.set_active_view(ViewPages.AVAILABLE)
    File 
"/usr/share/software-center/softwarecenter/ui/gtk3/session/viewmanager.py", 
line 149, in set_active_view
      view_widget.init_view()
    File 
"/usr/share/software-center/softwarecenter/ui/gtk3/panes/availablepane.py", 
line 165, in init_view
      self.apps_filter)
    File 
"/usr/share/software-center/softwarecenter/ui/gtk3/views/catview_gtk.py", line 
240, in __init__
      self.build(desktopdir)
    File 
"/usr/share/software-center/softwarecenter/ui/gtk3/views/catview_gtk.py", line 
491, in build
      self._build_homepage_view()
    File 
"/usr/share/software-center/softwarecenter/ui/gtk3/views/catview_gtk.py", line 
266, in _build_homepage_view
      self._append_whats_new()
    File 
"/usr/share/software-center/softwarecenter/ui/gtk3/views/catview_gtk.py", line 
430, in _append_whats_new
      whats_new_cat = self._update_whats_new_content()
    File 
"/usr/share/software-center/softwarecenter/ui/gtk3/views/catview_gtk.py", line 
419, in _update_whats_new_content
      docs = whats_new_cat.get_documents(self.db)
    File "/usr/share/software-center/softwarecenter/db/categories.py", line 
124, in get_documents
      nonblocking_load=False)
    File "/usr/share/software-center/softwarecenter/db/enquire.py", line 317, 
in set_query
      self._blocking_perform_search()
    File "/usr/share/software-center/softwarecenter/db/enquire.py", line 212, 
in _blocking_perform_search
      matches = enquire.get_mset(0, self.limit, None, xfilter)
    File "/usr/share/software-center/softwarecenter/db/appfilter.py", line 89, 
in __call__
      if (not pkgname in self.cache and
    File 
"/usr/share/software-center/softwarecenter/db/pkginfo_impl/aptcache.py", line 
262, in __contains__
      return self._cache.__contains__(k)
  AttributeError: 'NoneType' object has no attribute '__contains__'

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