#vulnerable code 
                              public static final boolean isTracedEval(Map<String, Object> env) {
    return (boolean) getInstance(env).getOption(Options.TRACE_EVAL);
  } 
                            #location 2 
                            #vulnerability type NULL_DEREFERENCE
#fixed code
                              public static final boolean isTracedEval(Map<String, Object> env) {
    return getInstance(env).getOption(Options.TRACE_EVAL) == Boolean.TRUE;
  }