BUG! exception in phase 'semantic analysis'

@groovy.transform.InheritConstructors
class Tuple<E> extends ArrayList<E> {

   public ListIterator<E> listIterator(final int index) {
        return new ListIterator<E>() {
            private final ListIterator<? extends E> i = Tuple.super.listIterator(index)

            public boolean hasNext()     {return i.hasNext();}
            public E next()              {return i.next();}
            public boolean hasPrevious() {return i.hasPrevious();}
            public E previous()          {return i.previous();}
            public int nextIndex()       {return i.nextIndex();}
            public int previousIndex()   {return i.previousIndex();}

            public void remove() {
                throw new UnsupportedOperationException();
            }
            public void set(E e) {
                throw new UnsupportedOperationException();
            }
            public void add(E e) {
                throw new UnsupportedOperationException();
            }
        };
    }
}