Traceback (most recent call last):
  File "/usr/bin/software-center", line 169, in <module>
    app.run(args)
  File "/usr/share/software-center/softwarecenter/ui/gtk3/app.py", line 1234, in run
    self.show_available_packages(args)
  File "/usr/share/software-center/softwarecenter/ui/gtk3/app.py", line 1177, in show_available_packages
    show_app(self, app)
  File "/usr/share/software-center/softwarecenter/utils.py", line 109, in wrapper
    f(*args, **kwargs)
  File "/usr/share/software-center/softwarecenter/ui/gtk3/app.py", line 1176, in show_app
    self.available_pane.show_app(app)
  File "/usr/share/software-center/softwarecenter/ui/gtk3/panes/softwarepane.py", line 330, in show_app
    self.on_application_activated(None, app)
  File "/usr/share/software-center/softwarecenter/utils.py", line 109, in wrapper
    f(*args, **kwargs)
  File "/usr/share/software-center/softwarecenter/ui/gtk3/panes/availablepane.py", line 603, in on_application_activated
    self.display_details_page)
  File "/usr/share/software-center/softwarecenter/ui/gtk3/session/viewmanager.py", line 159, in display_page
    callback(page, view_state)
  File "/usr/share/software-center/softwarecenter/ui/gtk3/panes/availablepane.py", line 537, in display_details_page
    SoftwarePane.display_details_page(self, page, view_state)
  File "/usr/share/software-center/softwarecenter/ui/gtk3/panes/softwarepane.py", line 677, in display_details_page
    self.app_details_view.show_app(view_state.application)
  File "/usr/share/software-center/softwarecenter/ui/gtk3/views/appdetailsview_gtk.py", line 1417, in show_app
    skip_update_addons=(type(self.app)==DebFileApplication))
  File "/usr/share/software-center/softwarecenter/ui/gtk3/views/appdetailsview_gtk.py", line 1228, in _update_all
    self._update_pkg_info_table(app_details)
  File "/usr/share/software-center/softwarecenter/ui/gtk3/views/appdetailsview_gtk.py", line 1165, in _update_pkg_info_table
    if app_details.license:
  File "/usr/share/software-center/softwarecenter/db/application.py", line 339, in license
    xapian_license = self._doc.get_value(XapianValues.LICENSE)
AttributeError: 'NoneType' object has no attribute 'get_value'