ref: 8e4b3c54d194d6daec84a696cfd9c3b8dd16d96f 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; }