Traceback (most recent call last):
  File "/usr/sbin/update-apt-xapian-index", line 102, in <module>
    indexer.incrementalUpdate()
  File "/usr/lib/python2.7/dist-packages/axi/indexer.py", line 669, in incrementalUpdate
    self.updateIndex(dbpath)
  File "/usr/lib/python2.7/dist-packages/axi/indexer.py", line 651, in updateIndex
    db.add_document(self.get_document_from_apt(pkg))
  File "/usr/lib/python2.7/dist-packages/axi/indexer.py", line 531, in get_document_from_apt
    addon.obj.index(document, pkg)
  File "/usr/share/apt-xapian-index/plugins/software-center.py", line 113, in index
    url = get_distro().get_downloadable_icon_url(ver.uri, icon)
  File "/usr/lib/python2.7/dist-packages/apt/package.py", line 531, in uri
    return iter(self._uris()).next()
StopIteration