Bug, sharing serializers gives an error

[okrische]

This test will fail with a RuntimeException:

    @Test
    public void testShareSerializers() {
        final LongSerializer serializer = new LongSerializer();
        final SerializerFactory factory = () -> new NFTypeSerializer[] { serializer };
        final FastBlobStateEngine engine = new FastBlobStateEngine(factory);
        final FastBlobStateEngine other = new FastBlobStateEngine(factory);     
    }