Bouland and Aaronson, Equation (26)

Specification

?
\[\begin{array}{l} \\ \left({\left(a \cdot a + b \cdot b\right)}^{2} + 4 \cdot \left(b \cdot b\right)\right) - 1 \end{array} \]
(FPCore (a b)
 :precision binary64
 (- (+ (pow (+ (* a a) (* b b)) 2.0) (* 4.0 (* b b))) 1.0))
double code(double a, double b) {
	return (pow(((a * a) + (b * b)), 2.0) + (4.0 * (b * b))) - 1.0;
}

real(8) function code(a, b)
    real(8), intent (in) :: a
    real(8), intent (in) :: b
    code = ((((a * a) + (b * b)) ** 2.0d0) + (4.0d0 * (b * b))) - 1.0d0
end function

public static double code(double a, double b) {
	return (Math.pow(((a * a) + (b * b)), 2.0) + (4.0 * (b * b))) - 1.0;
}

def code(a, b):
	return (math.pow(((a * a) + (b * b)), 2.0) + (4.0 * (b * b))) - 1.0

function code(a, b)
	return Float64(Float64((Float64(Float64(a * a) + Float64(b * b)) ^ 2.0) + Float64(4.0 * Float64(b * b))) - 1.0)
end

function tmp = code(a, b)
	tmp = ((((a * a) + (b * b)) ^ 2.0) + (4.0 * (b * b))) - 1.0;
end

code[a_, b_] := N[(N[(N[Power[N[(N[(a * a), $MachinePrecision] + N[(b * b), $MachinePrecision]), $MachinePrecision], 2.0], $MachinePrecision] + N[(4.0 * N[(b * b), $MachinePrecision]), $MachinePrecision]), $MachinePrecision] - 1.0), $MachinePrecision]

\begin{array}{l}

\\
\left({\left(a \cdot a + b \cdot b\right)}^{2} + 4 \cdot \left(b \cdot b\right)\right) - 1
\end{array}

Reproduce

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herbie shell --seed 2024257 
(FPCore (a b)
  :name "Bouland and Aaronson, Equation (26)"
  :precision binary64
  (- (+ (pow (+ (* a a) (* b b)) 2.0) (* 4.0 (* b b))) 1.0))

Please file a bug report with this information.

Backtrace

first: contract violation expected: (and/c list? (not/c empty?)) given: #fLC
run-egg/home/nightlies/herbie/eclass-test-rev/src/core/egg-herbie.rkt11790
simplify-batch/home/nightlies/herbie/eclass-test-rev/src/core/simplify.rkt210
(unnamed)/usr/local/racket/collects/racket/contract/private/arrow-higher-order.rkt37933
lower-approximations/home/nightlies/herbie/eclass-test-rev/src/core/patch.rkt200
generate-candidates/home/nightlies/herbie/eclass-test-rev/src/core/patch.rkt1450
run-iter!/home/nightlies/herbie/eclass-test-rev/src/core/mainloop.rkt660
run-improve!/home/nightlies/herbie/eclass-test-rev/src/core/mainloop.rkt430
get-alternatives/report/home/nightlies/herbie/eclass-test-rev/src/api/sandbox.rkt1870
(unnamed)/home/nightlies/herbie/eclass-test-rev/src/api/sandbox.rkt2836
(unnamed)/usr/local/racket/share/pkgs/profile-lib/main.rkt4010
profile-thunk/usr/local/racket/share/pkgs/profile-lib/main.rkt90
(unnamed)/usr/local/racket/collects/racket/engine.rkt4224