[bugfix] don't melt base header into *backword* free chunk as well.

2015-07-16 17:11:55 +09:00
parent ebcf6d00fb
commit 6fdd5ef05d
1 changed files with 1 additions and 1 deletions
@@ -203,7 +203,7 @@ heap_free(pic_state *pic, void *ap)
  } else {
    bp->s.ptr = p->s.ptr;
  }
-  if (p + p->s.size == bp) {
+  if (p + p->s.size == bp && bp->s.size > 0) { /* don't melt base header */
    p->s.size += bp->s.size;
    p->s.ptr = bp->s.ptr;
  } else {