ref: b7f42e58b25d64fa8a03e8ac06a5f5e5e92c552a 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; }