Exception for logq (problem 3.4.3)

Math

\[\log \left(\frac{1 - \varepsilon}{1 + \varepsilon}\right)\]

C

double f(double eps) {
        double r8172 = 1.0;
        double r8173 = eps;
        double r8174 = r8172 - r8173;
        double r8175 = r8172 + r8173;
        double r8176 = r8174 / r8175;
        double r8177 = log(r8176);
        return r8177;
}

Reproduce

Please include this information when filing a bug report:

herbie shell --seed 2019191 
(FPCore (eps)
  :name "logq (problem 3.4.3)"

  :herbie-target
  (* -2.0 (+ (+ eps (/ (pow eps 3.0) 3.0)) (/ (pow eps 5.0) 5.0)))

  (log (/ (- 1.0 eps) (+ 1.0 eps))))

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