dl_set_next       224 gc/finalize.c      dl_set_next(new_dl, dl_head[index]);
dl_set_next       255 gc/finalize.c                  dl_set_next(prev_dl, dl_next(curr_dl));
dl_set_next       261 gc/finalize.c  	      dl_set_next(curr_dl, 0);
dl_set_next       566 gc/finalize.c                  dl_set_next(prev_dl, next_dl);
dl_set_next       657 gc/finalize.c                  dl_set_next(prev_dl, next_dl);