Description jerome 2003-01-30 10:44:58 EST

This problem can be reproduced easily. Here is the code:
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public interface TopInterface extends Cloneable {
    public Object clone();
}
public interface SubInterface extends TopInterface {
}
public class ConcreteClass implements SubInterface {
    public Object clone() {
	ConcreteClass clone = null;
	try {
	    clone = (ConcreteClass)super.clone();
	} catch (CloneNotSupportedException e) {
	    return null;
	}
	return clone;
    }
	
    public String toString() {
	return "Concrete Class: " + getClass().getName();
    }
}
public class  TestClass {
    public static void main(String[] args) {
	SubInterface sub = new ConcreteClass();
	SubInterface sub2 = (SubInterface)sub.clone();
	System.out.println(sub2.toString());
    }
}
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Now compile this using AspectJ with JDK1.3.1_04 or JDK1.4.0, ANT 1.5. (my 
command line looks like this: java org.aspectj.tools.ant.taskdefs.Ajc ......)

And run the TestClass above:
- with JRE1.3.1_04 you get "Concrete Class: ConcreteClass"
- with JRE1.4.0 you get "java.lang.AbstractMethodError at TestClass.main
(TestClass.java:4)"

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I don't know if this is a bug in the compilation or in the VM (as it's a 
runtime problem), but I tested compiling the test with JDK javac (1.3.0_04 and 
1.4.0) and then it worked fine. So I guess this has to do with AspectJ.