Exception for bug500, discussion (missed optimization)

Specification

\[\begin{array}{l} \\ \log \left(\frac{\sinh x}{x}\right) \end{array} \]

(FPCore (x) :precision binary64 (log (/ (sinh x) x)))

double code(double x) {
	return log((sinh(x) / x));
}

real(8) function code(x)
    real(8), intent (in) :: x
    code = log((sinh(x) / x))
end function

public static double code(double x) {
	return Math.log((Math.sinh(x) / x));
}

def code(x):
	return math.log((math.sinh(x) / x))

function code(x)
	return log(Float64(sinh(x) / x))
end

function tmp = code(x)
	tmp = log((sinh(x) / x));
end

code[x_] := N[Log[N[(N[Sinh[x], $MachinePrecision] / x), $MachinePrecision]], $MachinePrecision]

\begin{array}{l}

\\
\log \left(\frac{\sinh x}{x}\right)
\end{array}

Reproduce

herbie shell --seed 2024196 
(FPCore (x)
  :name "bug500, discussion (missed optimization)"
  :precision binary64

  :alt
  (! :herbie-platform default (if (< (fabs x) 17/200) (let ((x2 (* x x))) (* x2 (fma (fma (fma -1/37800 x2 1/2835) x2 -1/180) x2 1/6))) (log (/ (sinh x) x))))

  (log (/ (sinh x) x)))

Please file a bug report with this information.

Backtrace

vector-set!: contract violation expected: exact-nonnegative-integer? given: -1 argument position: 2nd first argument...: '#(#f #t #f #f #f)		L	C
backward-pass	/home/nightlies/rival/main/eval/adjust.rkt	8	0
rival-machine-adjust	/home/nightlies/rival/main/eval/run.rkt	98	0
rival-machine-full	/home/nightlies/rival/main/eval/main.rkt	16	0
rival-apply	/home/nightlies/rival/main/eval/main.rkt	56	0
(unnamed)	/usr/local/racket/collects/racket/contract/private/arrow-val-first.rkt	486	18
(unnamed)	/home/nightlies/herbie/zane-odyssey-timeline/src/sampling.rkt	159	4
ival-eval	/home/nightlies/herbie/zane-odyssey-timeline/src/sampling.rkt	153	0
<eval-prog-real>	/home/nightlies/herbie/zane-odyssey-timeline/src/sampling.rkt	188	2
predict-errors	/home/nightlies/herbie/zane-odyssey-timeline/src/explain.rkt	86	0
explain	/home/nightlies/herbie/zane-odyssey-timeline/src/explain.rkt	736	0
explain!	/home/nightlies/herbie/zane-odyssey-timeline/src/mainloop.rkt	339	0
mutate!	/home/nightlies/herbie/zane-odyssey-timeline/src/mainloop.rkt	62	0
run-improve!	/home/nightlies/herbie/zane-odyssey-timeline/src/mainloop.rkt	48	0
get-alternatives/report	/home/nightlies/herbie/zane-odyssey-timeline/src/sandbox.rkt	167	0
(unnamed)	/home/nightlies/herbie/zane-odyssey-timeline/src/sandbox.rkt	261	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

Could not converge on a ground truth

Specification

Reproduce

Backtrace