output: #fixed code
                                @Test
    public void testSpecialStyles() throws Exception {
      File f = new File("src/test/resources/special_types.xlsx");
  
      Map<Integer, List<Cell>> contents = new HashMap<>();
      try(Workbook wb = StreamingReader.builder().open(f)) {
        for(Row row : wb.getSheetAt(0)) {
          contents.put(row.getRowNum(), new ArrayList<Cell>());
          for(Cell c : row) {
            if(c.getColumnIndex() > 0) {
              contents.get(row.getRowNum()).add(c);
            }
          }
        }
      }
  
      SimpleDateFormat df = new SimpleDateFormat("dd/MM/yyyy");
  
      assertThat(contents.size(), equalTo(2));
      assertThat(contents.get(0).size(), equalTo(4));
      assertThat(contents.get(0).get(0).getStringCellValue(), equalTo("Thu\", \"Dec 25\", \"14"));
      assertThat(contents.get(0).get(0).getDateCellValue(), equalTo(df.parse("25/12/2014")));
      assertThat(contents.get(0).get(1).getStringCellValue(), equalTo("02/04/15"));
      assertThat(contents.get(0).get(1).getDateCellValue(), equalTo(df.parse("04/02/2015")));
      assertThat(contents.get(0).get(2).getStringCellValue(), equalTo("14\". \"Mar\". \"2015"));
      assertThat(contents.get(0).get(2).getDateCellValue(), equalTo(df.parse("14/03/2015")));
      assertThat(contents.get(0).get(3).getStringCellValue(), equalTo("2015-05-05"));
      assertThat(contents.get(0).get(3).getDateCellValue(), equalTo(df.parse("05/05/2015")));
  
      assertThat(contents.get(1).size(), equalTo(4));
      assertThat(contents.get(1).get(0).getStringCellValue(), equalTo("3.12"));
      assertThat(contents.get(1).get(0).getNumericCellValue(), equalTo(3.12312312312));
      assertThat(contents.get(1).get(1).getStringCellValue(), equalTo("1,023,042"));
      assertThat(contents.get(1).get(1).getNumericCellValue(), equalTo(1023042.0));
      assertThat(contents.get(1).get(2).getStringCellValue(), equalTo("-312,231.12"));
      assertThat(contents.get(1).get(2).getNumericCellValue(), equalTo(-312231.12123145));
      assertThat(contents.get(1).get(3).getStringCellValue(), equalTo("(132)"));
      assertThat(contents.get(1).get(3).getNumericCellValue(), equalTo(-132.0));
    }
input: #vulnerable code 
                                @Test
    public void testSpecialStyles() throws Exception {
      File f = new File("src/test/resources/special_types.xlsx");
  
      Map<Integer, List<Cell>> contents = new HashMap<>();
      try(StreamingReader reader = StreamingReader.builder().read(f)) {
        for(Row row : reader) {
          contents.put(row.getRowNum(), new ArrayList<Cell>());
          for(Cell c : row) {
            if(c.getColumnIndex() > 0) {
              contents.get(row.getRowNum()).add(c);
            }
          }
        }
      }
  
      SimpleDateFormat df = new SimpleDateFormat("dd/MM/yyyy");
  
      assertThat(contents.size(), equalTo(2));
      assertThat(contents.get(0).size(), equalTo(4));
      assertThat(contents.get(0).get(0).getStringCellValue(), equalTo("Thu\", \"Dec 25\", \"14"));
      assertThat(contents.get(0).get(0).getDateCellValue(), equalTo(df.parse("25/12/2014")));
      assertThat(contents.get(0).get(1).getStringCellValue(), equalTo("02/04/15"));
      assertThat(contents.get(0).get(1).getDateCellValue(), equalTo(df.parse("04/02/2015")));
      assertThat(contents.get(0).get(2).getStringCellValue(), equalTo("14\". \"Mar\". \"2015"));
      assertThat(contents.get(0).get(2).getDateCellValue(), equalTo(df.parse("14/03/2015")));
      assertThat(contents.get(0).get(3).getStringCellValue(), equalTo("2015-05-05"));
      assertThat(contents.get(0).get(3).getDateCellValue(), equalTo(df.parse("05/05/2015")));
  
      assertThat(contents.get(1).size(), equalTo(4));
      assertThat(contents.get(1).get(0).getStringCellValue(), equalTo("3.12"));
      assertThat(contents.get(1).get(0).getNumericCellValue(), equalTo(3.12312312312));
      assertThat(contents.get(1).get(1).getStringCellValue(), equalTo("1,023,042"));
      assertThat(contents.get(1).get(1).getNumericCellValue(), equalTo(1023042.0));
      assertThat(contents.get(1).get(2).getStringCellValue(), equalTo("-312,231.12"));
      assertThat(contents.get(1).get(2).getNumericCellValue(), equalTo(-312231.12123145));
      assertThat(contents.get(1).get(3).getStringCellValue(), equalTo("(132)"));
      assertThat(contents.get(1).get(3).getNumericCellValue(), equalTo(-132.0));
    } 
                              #location 31 
                              #vulnerability type NULL_DEREFERENCE