{

            // Is a map for a specific place trying to place a unique which
            // somehow already got created?
            if (place.map.place.is_valid()
                && !invalid_monster_class(monster_type_thing.mid)
                && mons_is_unique(monster_type_thing.mid)
                && you.unique_creatures[monster_type_thing.mid])
            {
                mprf(MSGCH_ERROR, "ERROR: %s already generated somewhere "
                     "else; please file a bug report.",
                     mons_type_name(monster_type_thing.mid,
                                    DESC_CAP_THE).c_str());
                // Force it to be generated anyways.
                you.unique_creatures[monster_type_thing.mid] = false;
            }
        }