Checking patch malloc/malloc.c...
error: while searching for:
			CHUNK_HDR_SZ | PREV_INUSE);
              set_foot (chunk_at_offset (old_top, old_size), CHUNK_HDR_SZ);
              set_head (old_top, old_size | PREV_INUSE | NON_MAIN_ARENA);
              _int_free (av, old_top, 1);
            }
          else
            {

error: patch failed: malloc/malloc.c:2646
error: malloc/malloc.c: patch does not apply