src/test/groovy/bugs/Groovy6841Bug.groovy

/*
 *  Licensed to the Apache Software Foundation (ASF) under one
 *  or more contributor license agreements.  See the NOTICE file
 *  distributed with this work for additional information
 *  regarding copyright ownership.  The ASF licenses this file
 *  to you under the Apache License, Version 2.0 (the
 *  "License"); you may not use this file except in compliance
 *  with the License.  You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing,
 *  software distributed under the License is distributed on an
 *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 *  KIND, either express or implied.  See the License for the
 *  specific language governing permissions and limitations
 *  under the License.
 */
package groovy.bugs

import groovy.test.GroovyTestCase

class Groovy6841Bug extends GroovyTestCase {
    void testShouldNotThrowNPEduringCompilation() {
        assertScript '''
@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();
            }
        };
    }
}
Tuple
'''
    }
}