Function foo

    line 374
    FAILED to compute RF
      line 441
      FAILED to compute RF
        line 803
        FAILED to compute RF
        line 83
        FAILED to compute RF
          line 394
          FAILED to compute RF
            line 390
            FAILED to compute RF
          line 331
          FAILED to compute RF
            line 327
            FAILED to compute RF
          line 61
          FAILED to compute RF
        line 31
        FAILED to compute RF
        line 833
        FAILED to compute RF
        line 441
        FAILED to compute RF
    line 551
    FAILED to compute RF
      line 710
      FAILED to compute RF