228       _tail = prev;

   228       _tail = prev;

   229     } else {

   229     } else {

   230       assert(_tail != curr, "%s", hrs_ext_msg(this, "invariant").buffer());

   230       assert(_tail != curr, "%s", hrs_ext_msg(this, "invariant").buffer());

   231       next->set_prev(prev);

   231       next->set_prev(prev);

   232     }

   232     }

   234       _last = NULL;

   234       _last = NULL;

   235     }

   235     }

   236 

   236 

   237     curr->set_next(NULL);

   237     curr->set_next(NULL);

   238     curr->set_prev(NULL);

   238     curr->set_prev(NULL);