Function foo

    line 444
    FAILED to compute RF
      line 519
      FAILED to compute RF
        line 889
        FAILED to compute RF
        line 83
        FAILED to compute RF
          line 466
          FAILED to compute RF
            line 460
            FAILED to compute RF
          line 395
          FAILED to compute RF
            line 389
            FAILED to compute RF
          line 61
          FAILED to compute RF
        line 31
        FAILED to compute RF
        line 921
        FAILED to compute RF
        line 519
        FAILED to compute RF
    line 633
    FAILED to compute RF
      line 796
      FAILED to compute RF