NoSuchElementException in PropertyMapIterator

[Ahmed Ashour]

Hi all,
I believe there is a bug in next() of PropertyMap.PropertyMapIterator, where 'iter' may not have more elements.
The line should be changed from "property = iter.next();" to "property = iter.hasNext() ? iter.next() : null;".
This checking is done in the constructor and in skipNotEnumerable(), but not in next().
Below is a complete test case, that fails in jdk8 and jdk9 code bases.
Thanks a lot,Ahmed Ashour
public class PropertyMapTest {
    @Test    public  void iterator() {        ScriptObject scriptObject = new ObjectConstructor();        for (Object o : scriptObject.getMap()) {        }    }
    public static final class ObjectConstructor extends ScriptObject {        private ScriptFunction addEventListener;
        public ScriptFunction G$addEventListener() {            return addEventListener;        }
        public void S$addEventListener(final ScriptFunction function) {            this.addEventListener = function;        }
        {            final List<Property> list = new ArrayList<>(1);            list.add(AccessorProperty.create("addEventListener", Property.WRITABLE_ENUMERABLE_CONFIGURABLE,                     virtualHandle("G$addEventListener", ScriptFunction.class),                    virtualHandle("S$addEventListener", void.class, ScriptFunction.class)));            setMap(PropertyMap.newMap(list));        }
        private static MethodHandle virtualHandle(final String name, final Class<?> rtype, final Class<?>... ptypes) {            try {                return MethodHandles.lookup().findVirtual(ObjectConstructor.class, name,                        MethodType.methodType(rtype, ptypes));            }            catch (final ReflectiveOperationException e) {                throw new IllegalStateException(e);            }        }    }}