3992
3993
self._converting_to_rich_root = False
3993
3994
# See <https://launchpad.net/bugs/456077> asking for a warning here
3994
3995
if self.source._format.network_name() != self.target._format.network_name():
3997
3999
revision_ids = self.target.search_missing_revision_ids(self.source,
3998
4000
revision_id, find_ghosts=find_ghosts).get_keys()