\[\sqrt[3]{\frac{1}{2 \cdot a} \cdot \left(\left(-g\right) + \sqrt{g \cdot g - h \cdot h}\right)} + \sqrt[3]{\frac{1}{2 \cdot a} \cdot \left(\left(-g\right) - \sqrt{g \cdot g - h \cdot h}\right)}\]

\sqrt[3]{\frac{1}{2 \cdot a} \cdot \left(\left(-g\right) + \sqrt{g \cdot g - h \cdot h}\right)} + \sqrt[3]{\frac{1}{2 \cdot a} \cdot \left(\left(-g\right) - \sqrt{g \cdot g - h \cdot h}\right)}

(FPCore (g h a)
 :precision binary64
 (+
  (cbrt (* (/ 1.0 (* 2.0 a)) (+ (- g) (sqrt (- (* g g) (* h h))))))
  (cbrt (* (/ 1.0 (* 2.0 a)) (- (- g) (sqrt (- (* g g) (* h h))))))))

double code(double g, double h, double a) {
	return cbrt((1.0 / (2.0 * a)) * (-g + sqrt((g * g) - (h * h)))) + cbrt((1.0 / (2.0 * a)) * (-g - sqrt((g * g) - (h * h))));
}

Reproduce

Please include this information when filing a bug report:

herbie shell --seed 2021067 
(FPCore (g h a)
  :name "2-ancestry mixing, positive discriminant"
  :precision binary64
  (+ (cbrt (* (/ 1.0 (* 2.0 a)) (+ (- g) (sqrt (- (* g g) (* h h)))))) (cbrt (* (/ 1.0 (* 2.0 a)) (- (- g) (sqrt (- (* g g) (* h h))))))))

Backtrace

simplify-batch: contract violation expected keyword argument #:precompute in: (-> (listof (or/c (listof any/c) symbol? value? real?)) #:precompute boolean? #:rules (listof rule?) (listof (listof (or/c (listof any/c) symbol? value? real?)))) contract from: (function simplify-batch) blaming: <pkgs>/herbie/core/simplify.rkt (assuming the contract is correct) at: <pkgs>/herbie/core/simplify.rkt:68.18		L	C
raise-blame-error	/opt/racket-7.9/collects/racket/contract/private/blame.rkt	347	0
for-loop	/opt/racket-7.9/collects/racket/contract/private/arrow-higher-order.rkt	508	13
kwd-checker	/opt/racket-7.9/collects/racket/contract/private/arrow-higher-order.rkt	496	11
connected-components	/data/pavpan/nightlies/herbie/egg-interface-fixes/src/symmetry.rkt	17	0
run-improve	/data/pavpan/nightlies/herbie/egg-interface-fixes/src/mainloop.rkt	387	0
(unnamed)	/data/pavpan/nightlies/herbie/egg-interface-fixes/src/sandbox.rkt	54	6
run	/opt/racket-7.9/share/pkgs/profile-lib/main.rkt	39	2
profile-thunk	/opt/racket-7.9/share/pkgs/profile-lib/main.rkt	9	0
(unnamed)	/opt/racket-7.9/collects/racket/engine.rkt	42	24