Exception for math.arg on complex

Math

\[\tan^{-1}_* \frac{im}{re} \]

FPCore

(FPCore (re im) :precision binary64 (atan2 im re))

C

double code(double re, double im) {
	return atan2(im, re);
}

Fortran

real(8) function code(re, im)
    real(8), intent (in) :: re
    real(8), intent (in) :: im
    code = atan2(im, re)
end function

Java

public static double code(double re, double im) {
	return Math.atan2(im, re);
}

Python

def code(re, im):
	return math.atan2(im, re)

Julia

function code(re, im)
	return atan(im, re)
end

MATLAB

function tmp = code(re, im)
	tmp = atan2(im, re);
end

Wolfram

code[re_, im_] := N[ArcTan[im / re], $MachinePrecision]

Reproduce

Please include this information when filing a bug report:

herbie shell --seed 2023241 
(FPCore (re im)
  :name "math.arg on complex"
  :precision binary64
  (atan2 im re))

Backtrace

inexact?: contract violation expected: number? given: (ival (bf "-2.098578716467387692404358116883839070632e323228496") (bf "2.098578716467387692404358116883839070632e323228496"))		L	C
real->bigfloat	/usr/share/racket/pkgs/math-lib/math/private/bigfloat/mpfr.rkt	470	0
...row-higher-order.rkt:375:33	/usr/share/racket/collects/racket/contract/private/arrow-higher-order.rkt	375	33
arg->precision	/home/nightlies/herbie/arb-support/src/programs.rkt	138	11
f	/home/nightlies/herbie/arb-support/src/programs.rkt	190	2
(unnamed)	/home/nightlies/herbie/arb-support/src/ground-truth.rkt	23	2
search-step	/home/nightlies/herbie/arb-support/src/searchreals.rkt	37	0
find-intervals	/home/nightlies/herbie/arb-support/src/searchreals.rkt	87	0
make-sampler	/home/nightlies/herbie/arb-support/src/sampling.rkt	94	0
sample-points	/home/nightlies/herbie/arb-support/src/ground-truth.rkt	64	0
setup-context!	/home/nightlies/herbie/arb-support/src/mainloop.rkt	293	0
get-alternatives/report	/home/nightlies/herbie/arb-support/src/sandbox.rkt	148	0
(unnamed)	/home/nightlies/herbie/arb-support/src/sandbox.rkt	247	6
(unnamed)	/usr/share/racket/pkgs/profile-lib/main.rkt	40	10
profile-thunk	/usr/share/racket/pkgs/profile-lib/main.rkt	9	0
(unnamed)	/usr/share/racket/collects/racket/engine.rkt	42	24