This is exactly what I do: --- klass = classPool.makeClass("java.lang.Object", null); --- When this is called the class is created but when I see bytecode System.out.println(klass.getSuperclass()) ->> java.lang.Object ---- public class java.lang.Object extends java.lang.Object { .... } -- or when try to run proguard that is using this classe It goes into stackOverflowError parsing it. -- There should be a special case to handle the java.lang.Object class! View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4133978#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...