added assert on invalid mark
@@ -563,9 +563,7 @@ resume:
if( avail > p->free_blocks ) p->free_blocks = avail;
avail = 0;
next += bits - 1;
-# ifdef GC_DEBUG
if( p->sizes[next] == 0 ) hl_fatal("assert");
-# endif
next += p->sizes[next];
if( next + nblocks > p->max_blocks ) {
p->next_block = next;
