Exception for Hyperbolic secant

Specification

\[\begin{array}{l} \\ \frac{2}{e^{x} + e^{-x}} \end{array} \]

(FPCore (x) :precision binary64 (/ 2.0 (+ (exp x) (exp (- x)))))

double code(double x) {
	return 2.0 / (exp(x) + exp(-x));
}

real(8) function code(x)
    real(8), intent (in) :: x
    code = 2.0d0 / (exp(x) + exp(-x))
end function

public static double code(double x) {
	return 2.0 / (Math.exp(x) + Math.exp(-x));
}

def code(x):
	return 2.0 / (math.exp(x) + math.exp(-x))

function code(x)
	return Float64(2.0 / Float64(exp(x) + exp(Float64(-x))))
end

function tmp = code(x)
	tmp = 2.0 / (exp(x) + exp(-x));
end

code[x_] := N[(2.0 / N[(N[Exp[x], $MachinePrecision] + N[Exp[(-x)], $MachinePrecision]), $MachinePrecision]), $MachinePrecision]

\begin{array}{l}

\\
\frac{2}{e^{x} + e^{-x}}
\end{array}

herbie shell --seed 2024246 
(FPCore (x)
  :name "Hyperbolic secant"
  :precision binary64
  (/ 2.0 (+ (exp x) (exp (- x)))))

Please file a bug report with this information.

map: contract violation expected: list? given: '((exp.f64 (neg.f64 x)) . #hasheq((errs . (1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 ...		L	C
gen-map	/usr/local/racket/collects/racket/private/map.rkt	257	2
actual-errors	/home/nightlies/herbie/zane-concrete-values/src/core/explain.rkt	35	0
generate-timelines	/home/nightlies/herbie/zane-concrete-values/src/core/explain.rkt	493	0
explain!	/home/nightlies/herbie/zane-concrete-values/src/core/mainloop.rkt	322	0
run-improve!	/home/nightlies/herbie/zane-concrete-values/src/core/mainloop.rkt	44	0
get-alternatives/report	/home/nightlies/herbie/zane-concrete-values/src/api/sandbox.rkt	186	0
(unnamed)	/home/nightlies/herbie/zane-concrete-values/src/api/sandbox.rkt	282	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