Exception for jeff quadratic root 2

Math

\[\begin{array}{l} \mathbf{if}\;b \geq 0:\\ \;\;\;\;\frac{2 \cdot c}{\left(-b\right) - \sqrt{b \cdot b - \left(4 \cdot a\right) \cdot c}}\\ \mathbf{else}:\\ \;\;\;\;\frac{\left(-b\right) + \sqrt{b \cdot b - \left(4 \cdot a\right) \cdot c}}{2 \cdot a}\\ \end{array}\]

FPCore

(FPCore (a b c)
 :precision binary64
 (if (>= b 0.0)
   (/ (* 2.0 c) (- (- b) (sqrt (- (* b b) (* (* 4.0 a) c)))))
   (/ (+ (- b) (sqrt (- (* b b) (* (* 4.0 a) c)))) (* 2.0 a))))

C

double code(double a, double b, double c) {
	double tmp;
	if (b >= 0.0) {
		tmp = (2.0 * c) / (-b - sqrt((b * b) - ((4.0 * a) * c)));
	} else {
		tmp = (-b + sqrt((b * b) - ((4.0 * a) * c))) / (2.0 * a);
	}
	return tmp;
}

Reproduce

Please include this information when filing a bug report:

herbie shell --seed 2021174 
(FPCore (a b c)
  :name "jeff quadratic root 2"
  :precision binary64
  (if (>= b 0.0) (/ (* 2.0 c) (- (- b) (sqrt (- (* b b) (* (* 4.0 a) c))))) (/ (+ (- b) (sqrt (- (* b b) (* (* 4.0 a) c)))) (* 2.0 a))))

Backtrace

hash-ref: no value found for key key: '(>=.f64 b 0)		L	C
loop	/data/pavpan/nightlies/herbie/master/src/core/localize.rkt	79	7
loop	/data/pavpan/nightlies/herbie/master/src/core/localize.rkt	79	7
localize-error	/data/pavpan/nightlies/herbie/master/src/core/localize.rkt	65	0
localize!	/data/pavpan/nightlies/herbie/master/src/mainloop.rkt	171	0
for-loop	/data/pavpan/nightlies/herbie/master/src/mainloop.rkt	478	4
run-iter!	/data/pavpan/nightlies/herbie/master/src/mainloop.rkt	472	0
run-improve	/data/pavpan/nightlies/herbie/master/src/mainloop.rkt	503	0
(unnamed)	/data/pavpan/nightlies/herbie/master/src/sandbox.rkt	56	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