ref: 8105290a1e8cc4bda9b9bb7e9583b9282fcb1cb1 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; }