Exception for math.exp on complex, real part

• Could not converge on a ground truth

  1. re = -18135223916146.61
  2. im = 1.724946001130143e+148

• 25.1% of points produce a very large (infinite) output. You may want to add a precondition.

Specification

Math

\[\begin{array}{l} \\ e^{re} \cdot \cos im \end{array} \]

FPCore

(FPCore (re im) :precision binary64 (* (exp re) (cos im)))

C

double code(double re, double im) {
	return exp(re) * cos(im);
}

Fortran

real(8) function code(re, im)
    real(8), intent (in) :: re
    real(8), intent (in) :: im
    code = exp(re) * cos(im)
end function

Java

public static double code(double re, double im) {
	return Math.exp(re) * Math.cos(im);
}

Python

def code(re, im):
	return math.exp(re) * math.cos(im)

Julia

function code(re, im)
	return Float64(exp(re) * cos(im))
end

MATLAB

function tmp = code(re, im)
	tmp = exp(re) * cos(im);
end

Wolfram

code[re_, im_] := N[(N[Exp[re], $MachinePrecision] * N[Cos[im], $MachinePrecision]), $MachinePrecision]

Reproduce

herbie shell --seed 2024257 
(FPCore (re im)
  :name "math.exp on complex, real part"
  :precision binary64
  (* (exp re) (cos im)))

Please file a bug report with this information.

Backtrace

first: contract violation expected: (and/c list? (not/c empty?)) given: #f		L	C
run-egg	/home/nightlies/herbie/eclass-test-rev/src/core/egg-herbie.rkt	1179	0
simplify-batch	/home/nightlies/herbie/eclass-test-rev/src/core/simplify.rkt	21	0
(unnamed)	/usr/local/racket/collects/racket/contract/private/arrow-higher-order.rkt	379	33
final-simplify!	/home/nightlies/herbie/eclass-test-rev/src/core/mainloop.rkt	362	0
extract!	/home/nightlies/herbie/eclass-test-rev/src/core/mainloop.rkt	77	0
run-improve!	/home/nightlies/herbie/eclass-test-rev/src/core/mainloop.rkt	43	0
get-alternatives/report	/home/nightlies/herbie/eclass-test-rev/src/api/sandbox.rkt	187	0
(unnamed)	/home/nightlies/herbie/eclass-test-rev/src/api/sandbox.rkt	283	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