Exception for expax (section 3.5)

Specification

\[710 > a \cdot x\]

\[\begin{array}{l} \\ e^{a \cdot x} - 1 \end{array} \]

(FPCore (a x) :precision binary64 (- (exp (* a x)) 1.0))

double code(double a, double x) {
	return exp((a * x)) - 1.0;
}

real(8) function code(a, x)
    real(8), intent (in) :: a
    real(8), intent (in) :: x
    code = exp((a * x)) - 1.0d0
end function

public static double code(double a, double x) {
	return Math.exp((a * x)) - 1.0;
}

def code(a, x):
	return math.exp((a * x)) - 1.0

function code(a, x)
	return Float64(exp(Float64(a * x)) - 1.0)
end

function tmp = code(a, x)
	tmp = exp((a * x)) - 1.0;
end

code[a_, x_] := N[(N[Exp[N[(a * x), $MachinePrecision]], $MachinePrecision] - 1.0), $MachinePrecision]

\begin{array}{l}

\\
e^{a \cdot x} - 1
\end{array}

Reproduce

herbie shell --seed 2024170 
(FPCore (a x)
  :name "expax (section 3.5)"
  :precision binary64
  :pre (> 710.0 (* a x))

  :alt
  (! :herbie-platform default (expm1 (* a x)))

  (- (exp (* a x)) 1.0))

Please file a bug report with this information.

Backtrace

timeline-push!: contract violation expected: jsexpr? given: '#hash((#t . 0.062438979744911194) (unknown . 0.8741457164287567) (precondition . 0.0009763240814208984) (valid . 0.062438979744911194)) in: the repeated argument of (-> symbol? jsexpr? ... void?) contract from: <pkgs>/herbie/timeline.rkt blaming: <pkgs>/herbie/searchreals.rkt (assuming the contract is correct) at: <pkgs>/herbie/timeline.rkt:10:3		L	C
raise-blame-error	/usr/local/racket/collects/racket/contract/private/blame.rkt	346	0
loop	/usr/local/racket/collects/racket/contract/private/list.rkt	991	12
(unnamed)	.../private/arrow-val-first.rkt	486	18
find-intervals	/home/nightlies/herbie/zane-job-abstraction3/src/searchreals.rkt	86	0
make-sampler	/home/nightlies/herbie/zane-job-abstraction3/src/sampling.rkt	110	0
sample-points	/home/nightlies/herbie/zane-job-abstraction3/src/sampling.rkt	244	0
setup-context!	/home/nightlies/herbie/zane-job-abstraction3/src/mainloop.rkt	45	0
get-alternatives/report	/home/nightlies/herbie/zane-job-abstraction3/src/sandbox.rkt	166	0
(unnamed)	/home/nightlies/herbie/zane-job-abstraction3/src/sandbox.rkt	260	6
(unnamed)	/usr/local/racket/share/pkgs/profile-lib/main.rkt	40	10
profile-thunk	/usr/local/racket/share/pkgs/profile-lib/main.rkt	9	0
(unnamed)	/usr/local/racket/collects/racket/engine.rkt	42	24