ref: 3c6c5a02710e4d7a3da6121e9bfb8d2bc0d786dd dir: /tests/cc/execute/0019-selfrefstruct.c/
int main() { struct S { struct S *p; int x; } s; s.x = 0; s.p = &s; return s.p->p->p->p->p->x; }