Exception for ENA, Section 1.4, Mentioned, A

Specification

\[-0.01 \leq x \land x \leq 0.01\]

Math

\[\begin{array}{l} \\ 1 - \cos x \end{array} \]

FPCore

(FPCore (x) :precision binary64 (- 1.0 (cos x)))

C

double code(double x) {
	return 1.0 - cos(x);
}

Fortran

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

Java

public static double code(double x) {
	return 1.0 - Math.cos(x);
}

Python

def code(x):
	return 1.0 - math.cos(x)

Julia

function code(x)
	return Float64(1.0 - cos(x))
end

MATLAB

function tmp = code(x)
	tmp = 1.0 - cos(x);
end

Wolfram

code[x_] := N[(1.0 - N[Cos[x], $MachinePrecision]), $MachinePrecision]

Reproduce

herbie shell --seed 2024054 
(FPCore (x)
  :name "ENA, Section 1.4, Mentioned, A"
  :precision binary64
  :pre (and (<= -0.01 x) (<= x 0.01))

  :alt
  (/ (* (sin x) (sin x)) (+ 1.0 (cos x)))

  (- 1.0 (cos x)))

Please file a bug report with this information.

Backtrace

precision: undefined; cannot use before initialization		L	C
ival-eval	/home/nightlies/herbie/longer-taylor/src/ground-truth.rkt	69	0
batch-prepare-points	/home/nightlies/herbie/longer-taylor/src/sampling.rkt	113	0
sample-points	/home/nightlies/herbie/longer-taylor/src/sampling.rkt	159	0
setup-context!	/home/nightlies/herbie/longer-taylor/src/mainloop.rkt	300	0
get-alternatives/report	/home/nightlies/herbie/longer-taylor/src/sandbox.rkt	169	0
(unnamed)	/home/nightlies/herbie/longer-taylor/src/sandbox.rkt	262	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