ref: a5cc4b7b763e9587dd1d91bd9214df6d6fcc1217 dir: /tests/execute/0043-union.c/
int main() { union { int a; int b; } u; u.a = 1; u.b = 3; if (u.a != 3 || u.b != 3) return 1; return 0; }