#vulnerable code 
                             @Test
	public void parseXml_data_type() {
		TextPropertyMarshallerImpl marshaller = new TextPropertyMarshallerImpl(Value.CAL_ADDRESS);
		ICalParameters params = new ICalParameters();

		Element element = xcalPropertyElement(marshaller, "<cal-address>mailto:johndoe@example.com</cal-address>");
		Result<TextPropertyImpl> result = marshaller.parseXml(element, params);

		TextPropertyImpl prop = result.getValue();
		assertEquals("mailto:johndoe@example.com", prop.getValue());
		assertWarnings(0, result.getWarnings());
	} 
                            #location 7 
                            #vulnerability type NULL_DEREFERENCE
#fixed code
                             @Test
	public void parseXml_data_type() {
		TextPropertyMarshallerImpl marshaller = new TextPropertyMarshallerImpl(Value.CAL_ADDRESS);
		Result<TextPropertyImpl> result = parseXCalProperty("<cal-address>mailto:johndoe@example.com</cal-address>", marshaller);

		TextPropertyImpl prop = result.getValue();
		assertEquals("mailto:johndoe@example.com", prop.getValue());
		assertWarnings(0, result.getWarnings());
	}