Exception for Exp of sum of logs

Specification

Math

\[\begin{array}{l} \\ e^{\log a + \log b} \end{array} \]

FPCore

(FPCore (a b) :precision binary64 (exp (+ (log a) (log b))))

C

double code(double a, double b) {
	return exp((log(a) + log(b)));
}

Fortran

real(8) function code(a, b)
    real(8), intent (in) :: a
    real(8), intent (in) :: b
    code = exp((log(a) + log(b)))
end function

Java

public static double code(double a, double b) {
	return Math.exp((Math.log(a) + Math.log(b)));
}

Python

def code(a, b):
	return math.exp((math.log(a) + math.log(b)))

Julia

function code(a, b)
	return exp(Float64(log(a) + log(b)))
end

MATLAB

function tmp = code(a, b)
	tmp = exp((log(a) + log(b)));
end

Wolfram

code[a_, b_] := N[Exp[N[(N[Log[a], $MachinePrecision] + N[Log[b], $MachinePrecision]), $MachinePrecision]], $MachinePrecision]

Reproduce

herbie shell --seed 2024238 
(FPCore (a b)
  :name "Exp of sum of logs"
  :precision binary64

  :alt
  (! :herbie-platform default (* a b))

  (exp (+ (log a) (log b))))

Please file a bug report with this information.

Backtrace

flexp2: contract violation expected: flonum? given: 0.043952488503085974+0.0i in: the 1st argument of (-> flonum? any) contract from: <pkgs>/math-lib/math/private/flonum/flonum-exp.rkt blaming: <pkgs>/herbie/core/logspace.rkt (assuming the contract is correct) at: <pkgs>/math-lib/math/private/flonum/flonum-exp.rkt:99:11		L	C
raise-blame-error	/usr/local/racket/collects/racket/contract/private/blame.rkt	346	0
(unnamed)	/usr/local/racket/collects/racket/contract/private/arrow-higher-order.rkt	379	33
log+	/home/nightlies/herbie/bhargav-log-space/src/core/logspace.rkt	52	0
compiled-prog	/home/nightlies/herbie/bhargav-log-space/src/core/compiler.rkt	26	2
predict-errors	/home/nightlies/herbie/bhargav-log-space/src/core/explain.rkt	88	0
explain	/home/nightlies/herbie/bhargav-log-space/src/core/explain.rkt	614	0
explain!	/home/nightlies/herbie/bhargav-log-space/src/core/mainloop.rkt	321	0
run-improve!	/home/nightlies/herbie/bhargav-log-space/src/core/mainloop.rkt	43	0
get-alternatives/report	/home/nightlies/herbie/bhargav-log-space/src/api/sandbox.rkt	184	0
(unnamed)	/home/nightlies/herbie/bhargav-log-space/src/api/sandbox.rkt	280	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