ref: c0384f10ac950085bdb5b6f2a5650b3421636d9b dir: /tests/0007-forstmt.c/
int main() { int x; x = 1; for(x = 10; x; x = x - 1) ; if(x) return 1; x = 10; for (;x;) x = x - 1; return x; }