MiniJava test case

crazy.java

class Main {
    public static void main(String[] a){
        System.out.println(1);
    }
}

class M extends Main {
    Main m;
    public Main man(int a) 
    {
        m = new Main();
        return (new Main());
    }

}

class N extends M
{
    public int doit()
    {
        m = new M();
        m = new N();
        m = new Main();
        return 1;
    }
}

class A {
    int aa;
    public int a() {
        return 0;
    }

    public boolean af()
    {
        return false && true;
    }
}

class B extends A {
    int bb;
    public int b() {
        aa = 1;
        return 1;
    }

    public boolean bf()
    {
        return true && (this.af());
    }
}

class C extends B {
    int cc;
    public int c() { 
        return 2;
    }
}


class D extends C {
    int dd;
    public int d(A a, B b)
    {
        B bbb;
        bbb = new D();
        return 1;
    }

    public int d1()
    {
        int x;
        int y;
        int z;
        A a;
        B b;
        C c;
        x = this.d (new A(), new B());
        x = this.d (new A(), new C());
        x = this.d (new A(), new D());
        x = this.d (new A(), new F());
        x = this.d (new B(), new B());
        x = this.d (new B(), new C());
        x = this.d (new B(), new D());
        x = this.d (new B(), new F());
        x = this.d (new C(), new B());
        x = this.d (new C(), new C());
        x = this.d (new C(), new D());
        x = this.d (new C(), new F());
        x = this.d (new D(), new B());
        x = this.d (new D(), new C());
        x = this.d (new D(), new D());
        x = this.d (new D(), new F());
        aa = this.b();
        bb = this.c();
        bb = a.a();
        bb = b.a();
        bb = c.c();
        bb = c.a();
        bb = c.b();
        bb = c.c();
        cc = 1;
        dd = 1;
        dd = 1;
        aa = 1;
        bb = 1;
        cc = 1;

        return 1;
    }
}

class F extends D {
 //   E e; // no error here
    A a;
    D d;
    int fff;
    int[] ar;
    boolean x;
    
    public int f()
    {
        //int x;
        x = true;
        x = false;
        x = true && false;
        x = true && true;
        x = false && false;
        x = (this.af()) && (this.bf());
        fff = 1 + 2;
        fff = 3 * 2;
        aa = ar[0];
        aa = ar[(this.a())];
        aa = ar[((new D()).a())];
        fff = this.a();
        fff = this.b();
        fff = this.c();
        fff = this.d1();
        return 1;
    }

    public int[] aaarrr()
    {
        int x;
        x = 1;
        return (new int[4]);
    }
}

class G extends F{
    int[] a;
    // no error here
    public int g()
    {
        //E e;
        a = this.aaarrr();
        return (new C()).a();
    }
}