ref: 4eb0595fdcfb5064a5f81b1ffe4fb2de4c6a3dd3 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; }