Ceph » rgw

iter->key is accessed even if iter == objs.end():

  while (iter != objs.end() || pref_iter != common_prefixes.end()) {
    bool do_pref = false;
    bool do_objs = false;
    rgw_obj_key& key = iter->key;
    if (pref_iter == common_prefixes.end())
      do_objs = true;
    else if (iter == objs.end())
      do_pref = true;
    else if (key.name.compare(pref_iter->first) == 0) {
      do_objs = true;
      ++pref_iter;
    } else if (key.name.compare(pref_iter->first) <= 0)
      do_objs = true;
    else
      do_pref = true;

This caused an issue in another branch where we don't take a ref to iter->key, but copy it. We should avoid accessing it anyway.