\[\frac{841}{108} \cdot x + \frac{4}{29}\]

\frac{841}{108} \cdot x + \frac{4}{29}

double f(double x) {
        double r8140 = 841.0;
        double r8141 = 108.0;
        double r8142 = r8140 / r8141;
        double r8143 = x;
        double r8144 = r8142 * r8143;
        double r8145 = 4.0;
        double r8146 = 29.0;
        double r8147 = r8145 / r8146;
        double r8148 = r8144 + r8147;
        return r8148;
}

Reproduce

Please include this information when filing a bug report:

herbie shell --seed 2019191 
(FPCore (x)
  :name "Data.Colour.CIE:cieLABView from colour-2.3.3, A"
  (+ (* (/ 841.0 108.0) x) (/ 4.0 29.0)))

Backtrace

get-representation: Unknown representation #f		L	C
loop	/data/pavpan/nightlies/herbie/interface2/src/points.rkt	122	4
prepare-points	/data/pavpan/nightlies/herbie/interface2/src/points.rkt	146	0
setup-prog!34	/data/pavpan/nightlies/herbie/interface2/src/mainloop.rkt	67	0
run-improve43	/data/pavpan/nightlies/herbie/interface2/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