removed = HT_REMOVE(cache_map, &cache_root, resolve);

    if (removed != resolve) {

      log_err(LD_BUG, "The expired resolve we purged didn't match any in"

              " the cache. Tried to purge %s; instead got %s.",

              resolve->address, removed ? removed->address : "NULL");

              " the cache. Tried to purge %s (%p); instead got %s (%p.",

              resolve->address, resolve,

              removed ? removed->address : "NULL", remove);

    }

    tor_assert(removed == resolve);

    resolve->magic = 0xF0BBF0BB;