output: #fixed code
                               @Test
  	public void TestNullGeom() throws Exception {
          ArrayList<Object> stuff = new ArrayList<Object>();
  		Properties proptab = new Properties();
  		proptab.setProperty(HiveShims.serdeConstants.LIST_COLUMNS, "shape");
  		proptab.setProperty(HiveShims.serdeConstants.LIST_COLUMN_TYPES, "binary");
  		SerDe jserde = mkSerDe(proptab);
          StructObjectInspector rowOI = (StructObjectInspector)jserde.getObjectInspector();
  
          //value.set("{\"properties\":{},\"geometry\":{\"type\":\"Point\",\"coordinates\":[15.0,5.0]}}");
          addWritable(stuff, new Point(15.0, 5.0));
  		Object row = runSerDe(stuff, jserde, rowOI);
  		Object fieldData = getField("shape", row, rowOI);
  		ckPoint(new Point(15.0, 5.0), (BytesWritable)fieldData);
  
          //value.set("{\"properties\":{},\"coordinates\":null}");
  		stuff.set(0, null);
  		row = runSerDe(stuff, jserde, rowOI);
  		fieldData = getField("shape", row, rowOI);
  		Assert.assertNull(fieldData);
  	}
input: #vulnerable code 
                               @Test
  	public void TestNullGeom() throws Exception {
  		Configuration config = new Configuration();
  		Text value = new Text();
  
  		SerDe jserde = new GeoJsonSerDe();
  		Properties proptab = new Properties();
  		proptab.setProperty(HiveShims.serdeConstants.LIST_COLUMNS, "shape");
  		proptab.setProperty(HiveShims.serdeConstants.LIST_COLUMN_TYPES, "binary");
  		jserde.initialize(config, proptab);
          StructObjectInspector rowOI = (StructObjectInspector)jserde.getObjectInspector();
  
          value.set("{\"properties\":{},\"geometry\":{\"type\":\"Point\",\"coordinates\":[15.0,5.0]}}");
  		Object row = jserde.deserialize(value);
  		StructField f0 = rowOI.getStructFieldRef("shape");
  		Object fieldData = rowOI.getStructFieldData(row, f0);
  		ckPoint(new Point(15.0, 5.0), (BytesWritable)fieldData);
  
          value.set("{\"properties\":{},\"coordinates\":null}");
          row = jserde.deserialize(value);
  		f0 = rowOI.getStructFieldRef("shape");
  		fieldData = rowOI.getStructFieldData(row, f0);
  		Assert.assertEquals(null, fieldData);
  	} 
                              #location 15 
                              #vulnerability type NULL_DEREFERENCE