\[\frac{\left(\left(\left(x \cdot y + z\right) \cdot y + 27464.7644704999984242022037506103515625\right) \cdot y + 230661.5106160000141244381666183471679688\right) \cdot y + t}{\left(\left(\left(y + a\right) \cdot y + b\right) \cdot y + c\right) \cdot y + i}\]

\frac{\left(\left(\left(x \cdot y + z\right) \cdot y + 27464.7644704999984242022037506103515625\right) \cdot y + 230661.5106160000141244381666183471679688\right) \cdot y + t}{\left(\left(\left(y + a\right) \cdot y + b\right) \cdot y + c\right) \cdot y + i}

double f(double x, double y, double z, double t, double a, double b, double c, double i) {
        double r6309846 = x;
        double r6309847 = y;
        double r6309848 = r6309846 * r6309847;
        double r6309849 = z;
        double r6309850 = r6309848 + r6309849;
        double r6309851 = r6309850 * r6309847;
        double r6309852 = 27464.7644705;
        double r6309853 = r6309851 + r6309852;
        double r6309854 = r6309853 * r6309847;
        double r6309855 = 230661.510616;
        double r6309856 = r6309854 + r6309855;
        double r6309857 = r6309856 * r6309847;
        double r6309858 = t;
        double r6309859 = r6309857 + r6309858;
        double r6309860 = a;
        double r6309861 = r6309847 + r6309860;
        double r6309862 = r6309861 * r6309847;
        double r6309863 = b;
        double r6309864 = r6309862 + r6309863;
        double r6309865 = r6309864 * r6309847;
        double r6309866 = c;
        double r6309867 = r6309865 + r6309866;
        double r6309868 = r6309867 * r6309847;
        double r6309869 = i;
        double r6309870 = r6309868 + r6309869;
        double r6309871 = r6309859 / r6309870;
        return r6309871;
}

Reproduce

Please include this information when filing a bug report:

herbie shell --seed 2019173 +o rules:numerics
(FPCore (x y z t a b c i)
  :name "Numeric.SpecFunctions:logGamma from math-functions-0.1.5.2"
  (/ (+ (* (+ (* (+ (* (+ (* x y) z) y) 27464.7644705) y) 230661.510616) y) t) (+ (* (+ (* (+ (* (+ y a) y) b) y) c) y) i)))

Backtrace

hash-ref: no value found for key key: #<enode 426(426)>		L	C
for-loop	/data/pavpan/nightlies/herbie/various-cleanup/src/core/simplify.rkt	197	2
extractor-extract	/data/pavpan/nightlies/herbie/various-cleanup/src/core/simplify.rkt	196	0
for-loop	/data/pavpan/nightlies/herbie/various-cleanup/src/core/simplify.rkt	35	2
(unnamed)	/data/pavpan/nightlies/herbie/various-cleanup/src/core/simplify.rkt	26	0
simplify!	/data/pavpan/nightlies/herbie/various-cleanup/src/mainloop.rkt	217	0
run-iter!	/data/pavpan/nightlies/herbie/various-cleanup/src/mainloop.rkt	320	0
for-loop	/data/pavpan/nightlies/herbie/various-cleanup/src/mainloop.rkt	354	4
run-improve43	/data/pavpan/nightlies/herbie/various-cleanup/src/mainloop.rkt	339	0
(unnamed)	/opt/racket-7.0/collects/racket/private/more-scheme.rkt	261	28
run	/opt/racket-7.0/share/pkgs/profile-lib/main.rkt	39	2
profile-thunk16	/opt/racket-7.0/share/pkgs/profile-lib/main.rkt	9	0
(unnamed)	/opt/racket-7.0/collects/racket/private/more-scheme.rkt	261	28