output: #fixed code
                                  @SuppressWarnings("unchecked")
      private static Deserializer deserializer(File file, PoijiOptions options) {
          final PoijiStream poiParser = new PoijiStream(file);
          final PoiWorkbook workbook = PoiWorkbook.workbook(Files.getExtension(file.getName()), poiParser);
          return Deserializer.instance(workbook, options);
      }
input: #vulnerable code 
                                  @SuppressWarnings("unchecked")
      private static Deserializer deserializer(File file, PoijiOptions options) throws FileNotFoundException {
          final PoijiStream poiParser = new PoijiStream(fileInputStream(file));
          final PoiWorkbook workbook = PoiWorkbook.workbook(Files.getExtension(file.getName()), poiParser);
          return Deserializer.instance(workbook, options);
      } 
                              #location 4 
                              #vulnerability type RESOURCE_LEAK