ref: c1b4b8354a76cc8c9aa13757e8b3db8d1b5a7c39 dir: /tests/cc/execute/0109-struct.c/
struct S1 { int x; }; struct S2 { struct S1 s1; }; int main() { struct S2 s2; s2.s1.x = 1; return 0; }