Description Vincenz Braun 2007-07-28 21:12:59 EDT

It may be a duplicate of 134425. But the setting is not that similar.
Take this example:

public interface Marker {

	String toString();
}

public class Foo {
	
	public static void main(String[] args) {
		System.err.println(new Foo().toString());
	}
}

public aspect MarkerAspect  {

	declare parents: Foo implements Marker;

	public String Marker.toString() {
		new Runnable() {
			public void run() {
				Marker.super.toString();
			}
		}.run();
		return super.toString();
	}
}

You will get an:
Exception in thread "main" java.lang.IncompatibleClassChangeError
	at test.MarkerAspect$1.run(MarkerAspect.aj:10)
	at test.MarkerAspect.ajc$interMethod$test_MarkerAspect$test_Marker$toString(MarkerAspect.aj:12)
	at test.Foo.toString(Foo.java:1)
	at test.Foo.main(Foo.java:6)

Slightly changing MarkerAspect:
public aspect MarkerAspect  {

	declare parents: Foo implements Marker;

	public String Foo.toString() {
		new Runnable() {
			public void run() {
				Foo.super.toString();
			}
		}.run();
		return super.toString();
	}
}	
And you will get:
Exception in thread "main" java.lang.VerifyError: (class: test/MarkerAspect$1, method: run signature: ()V) Incompatible object argument for function call
	at test.MarkerAspect.ajc$interMethod$test_MarkerAspect$test_Foo$toString(MarkerAspect.aj:8)
	at test.Foo.toString(Foo.java:1)
	at test.MarkerAspect.ajc$interMethodDispatch1$test_MarkerAspect$test_Foo$toString(MarkerAspect.aj)
	at test.Foo.main(Foo.java:6)