ref: 9f947ff3f1e8e418d43e9f201d2f293d3187a3a0 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; }