#vulnerable code 
                             @Test
	public void parseXml_data() {
		ICalParameters params = new ICalParameters();

		Element element = xcalPropertyElement(marshaller, "<binary>" + Base64.encodeBase64String("data".getBytes()) + "</binary>");
		Result<Attachment> result = marshaller.parseXml(element, params);

		Attachment prop = result.getValue();
		assertNull(prop.getUri());
		assertArrayEquals("data".getBytes(), prop.getData());

		assertWarnings(0, result.getWarnings());
	} 
                            #location 6 
                            #vulnerability type NULL_DEREFERENCE
#fixed code
                             @Test
	public void parseXml_data() {
		Result<Attachment> result = parseXCalProperty("<binary>" + Base64.encodeBase64String("data".getBytes()) + "</binary>", marshaller);

		Attachment prop = result.getValue();
		assertNull(prop.getUri());
		assertArrayEquals("data".getBytes(), prop.getData());

		assertWarnings(0, result.getWarnings());
	}