Traceback (most recent call last):
  File "/usr/share/software-center/softwarecenter/utils.py", line 112, in wrapper
    f(*args, **kwargs)
  File "/usr/share/software-center/softwarecenter/ui/gtk3/panes/availablepane.py", line 685, in on_application_activated
    self.display_details_page)
  File "/usr/share/software-center/softwarecenter/ui/gtk3/session/viewmanager.py", line 182, in display_page
    callback(page, view_state)
  File "/usr/share/software-center/softwarecenter/ui/gtk3/panes/availablepane.py", line 619, in display_details_page
    SoftwarePane.display_details_page(self, page, view_state)
  File "/usr/share/software-center/softwarecenter/ui/gtk3/panes/softwarepane.py", line 483, in display_details_page
    self.app_details_view.show_app(view_state.application)
  File "/usr/share/software-center/softwarecenter/ui/gtk3/views/appdetailsview.py", line 1743, in show_app
    skip_update_addons=(type(self.app)==DebFileApplication))
  File "/usr/share/software-center/softwarecenter/ui/gtk3/views/appdetailsview.py", line 1551, in _update_all
    self._update_addons(app_details)
  File "/usr/share/software-center/softwarecenter/ui/gtk3/views/appdetailsview.py", line 1504, in _update_addons
    self.addons_manager.configure(app_details.pkgname)
  File "/usr/share/software-center/softwarecenter/ui/gtk3/views/appdetailsview.py", line 778, in configure
    self.addons = self.view.cache.get_addons(pkgname)
  File "/usr/share/software-center/softwarecenter/db/pkginfo_impl/aptcache.py", line 703, in get_addons
    pkgdep_rec =  self._get_recommends(pkgdep)
  File "/usr/share/software-center/softwarecenter/db/pkginfo_impl/aptcache.py", line 388, in _get_recommends
    return self._get_depends_by_type_str(pkg, self.RECOMMENDS_TYPES)
  File "/usr/share/software-center/softwarecenter/db/pkginfo_impl/aptcache.py", line 374, in _get_depends_by_type_str
    deps = self._get_depends_by_type(pkg, *types)
  File "/usr/share/software-center/softwarecenter/db/pkginfo_impl/aptcache.py", line 54, in _converted
    return f(self, pkg, *args)
  File "/usr/share/software-center/softwarecenter/db/pkginfo_impl/aptcache.py", line 367, in _get_depends_by_type
    return version.get_dependencies(*types)
AttributeError: 'NoneType' object has no attribute 'get_dependencies'