while (count_this--)
    {
        OH_iterator save_iterator = reap_iterator;

        UObject* obj = (*save_iterator).second.get();

        // We want the objecthash to be the holder of the last reference to an
        // object when it is deleted - hence the ref_counted_count() check.
        if (obj->orphan() && obj->ref_counted_count() == 1)
        {
            dirty_deleted.insert( cfBEu32(obj->serial_ext) );
            hash.erase( save_iterator );
        }

        if (++reap_iterator == hash.end())
        {
            reap_iterator = hash.begin();
            if (reap_iterator == hash.end())
                break;
        }
    }