Exception for Diagrams.Solve.Polynomial:quartForm from diagrams-solve-0.1, D

Math

\[\frac{x \cdot y}{2} - \frac{z}{8}\]

C

double f(double x, double y, double z) {
        double r8230 = x;
        double r8231 = y;
        double r8232 = r8230 * r8231;
        double r8233 = 2.0;
        double r8234 = r8232 / r8233;
        double r8235 = z;
        double r8236 = 8.0;
        double r8237 = r8235 / r8236;
        double r8238 = r8234 - r8237;
        return r8238;
}

Reproduce

Please include this information when filing a bug report:

herbie shell --seed 2019191 
(FPCore (x y z)
  :name "Diagrams.Solve.Polynomial:quartForm  from diagrams-solve-0.1, D"
  (- (/ (* x y) 2.0) (/ z 8.0)))

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