ref: 4c09eaec1c1f81e175b6e8b6266e8a2c9aa7afaa dir: /tests/execute/0109-struct.c/
struct S1 { int x; }; struct S2 { struct S1 s1; }; int main() { struct S2 s2; s2.s1.x = 1; return 0; }