should writing native arrays work in Mapper?

[Mark Struberg]

new MapperBuilder().build().writeArray(new short[] { 1, 2 }, baos);

This currently blows up with 
java.lang.ClassCastException: [S cannot be cast to [Ljava.lang.Object;
    at org.apache.johnzon.mapper.Mapper.writeArray(Mapper.java:72)
    at org.apache.johnzon.mapper.MapperTest.writeArray(MapperTest.java:491)
    

I assume it is intended that this should work, right?
LieGrue,strub