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[aspectj-users] cflowbelow does not work in constructor?

I have an aspect A and a java class C like the following. I want to do something (in my example, it is printing out a message) ONCE after an instnace of C is constructed. Because I just want this thing be done ONCE, I use !cflowbelow to prevent things done when a constuctor invocation is called by top level constructor. However, it does not work. The printing message is printed twice.  Does cflowbelow not work in constructor? Or what I do is wrong?

aspect A {
   
    // TODO why does cflowbelow not behavior correctly on constructor like on method?
    pointcut construction(C c):
        execution(C.new(..)) &&
        this(c);
   
    after(C c) returning:
            construction(c) &&
            !cflowbelow(construction(C)) {
        System.out.println("a C instance constructed");
    }   
}

class C {
  private int n;

  public C() {
     this(1);
  }

  public C(int n) {
     this.n = n;
  }

    public static void main(String[] args) {
        C c = new C();
    }
}

Regards,
Rice