Exception for Kahan's exp quotient

Math

\[\frac{e^{x} - 1}{x}\]

C

double code(double x) {
	return ((double) (((double) (((double) exp(x)) - 1.0)) / x));
}

Reproduce

Please include this information when filing a bug report:

herbie shell --seed 2020169 
(FPCore (x)
  :name "Kahan's exp quotient"
  :precision binary64

  :herbie-target
  (if (and (< x 1.0) (> x -1.0)) (/ (- (exp x) 1.0) (log (exp x))) (/ (- (exp x) 1.0) x))

  (/ (- (exp x) 1.0) x))

Backtrace

match-define: no matching clause for '(== branch341 -3.673075940125942e-06)		L	C
match:error	/opt/racket-7.5/collects/racket/match/runtime.rkt	24	0
program-body	/data/pavpan/nightlies/herbie/ival-find-range/src/programs.rkt	25	0
(unnamed)	/opt/racket-7.5/collects/racket/contract/private/arrow-higher-order.rkt	379	33
prepare-points	/data/pavpan/nightlies/herbie/ival-find-range/src/points.rkt	130	0
pred	/data/pavpan/nightlies/herbie/ival-find-range/src/core/regimes.rkt	204	4
.../more-scheme.rkt:261:28	unknown
for-loop	/data/pavpan/nightlies/herbie/ival-find-range/src/core/regimes.rkt	240	3
sindices->spoints	/data/pavpan/nightlies/herbie/ival-find-range/src/core/regimes.rkt	194	0
f37	unknown
get-final-combination	/data/pavpan/nightlies/herbie/ival-find-range/src/mainloop.rkt	389	0
.../more-scheme.rkt:261:28	unknown
run	/opt/racket-7.5/share/pkgs/profile-lib/main.rkt	39	2
profile-thunk16	/opt/racket-7.5/share/pkgs/profile-lib/main.rkt	9	0
(unnamed)	/opt/racket-7.5/collects/racket/private/more-scheme.rkt	261	28

Reproduce

herbie shell --seed 2020169 
(FPCore (x)
  :name "Kahan's exp quotient"
  :precision binary64

  :herbie-target
  (if (and (< x 1.0) (> x -1.0)) (/ (- (exp x) 1.0) (log (exp x))) (/ (- (exp x) 1.0) x))

  (/ (- (exp x) 1.0) x))