ref: cb1b6c86fe82527f4c3c5f8f11ea4f5e4ae6a350 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; }