scc

 1int
 2main()
 3{
 4	struct T { int x; } s1;
 5	s1.x = 1;
 6	{
 7		struct T { int y; } s2;
 8		s2.y = 1;
 9		if (s1.x - s2.y != 0)
10			return 1;
11	}
12	return 0;
13}