ref: 9cdf8d4b4c9ecf24e8e065fdbf9a6aea48d5f4af dir: /tests/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; }