Exception for FastMath test1

Math

\[d \cdot 10 + d \cdot 20\]

C

double f(double d) {
        double r8862 = d;
        double r8863 = 10.0;
        double r8864 = r8862 * r8863;
        double r8865 = 20.0;
        double r8866 = r8862 * r8865;
        double r8867 = r8864 + r8866;
        return r8867;
}

Reproduce

Please include this information when filing a bug report:

herbie shell --seed 2019191 
(FPCore (d)
  :name "FastMath test1"

  :herbie-target
  (* d 30.0)

  (+ (* d 10.0) (* d 20.0)))

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