What is the output of this program?

EggsToast.java

// What is the output of this program?
// a) x = 2
// b) x = 3
// c) compile-error
// d) runtime exception
// e) something else _____
abstract class Eggs {
  abstract void m();

  Eggs() {
    m();
  }
}

class Toast extends Eggs {
  private int x = 2;

  Toast() {
    m();
    x = 3;
    m();
  }

  public void m() {
    System.out.println("x = " + x);
    try {
	    throw new Throwable();
    } catch (Throwable t) {
	    t.printStackTrace();
    }
  }

  public static void main(String[] args) {
    new Toast();
  }
}

The output for reference

$ java Toast 
x = 0
java.lang.Throwable
    at Toast.m(EggsToast.java:27)
    at Eggs.<init>(EggsToast.java:11)
    at Toast.<init>(EggsToast.java:18)
    at Toast.main(EggsToast.java:34)
x = 2
java.lang.Throwable
    at Toast.m(EggsToast.java:27)
    at Toast.<init>(EggsToast.java:19)
    at Toast.main(EggsToast.java:34)
x = 3
java.lang.Throwable
    at Toast.m(EggsToast.java:27)
    at Toast.<init>(EggsToast.java:21)
    at Toast.main(EggsToast.java:34)