Rump's expression from Stadtherr's award speech

Specification

?
\[x = 77617 \land y = 33096\]
\[\begin{array}{l} \\ -0.8273960599468214 \end{array} \]
(FPCore (x y) :precision binary64 -0.8273960599468214)
double code(double x, double y) {
	return -0.8273960599468214;
}

real(8) function code(x, y)
    real(8), intent (in) :: x
    real(8), intent (in) :: y
    code = -0.8273960599468214d0
end function

public static double code(double x, double y) {
	return -0.8273960599468214;
}

def code(x, y):
	return -0.8273960599468214

function code(x, y)
	return -0.8273960599468214
end

function tmp = code(x, y)
	tmp = -0.8273960599468214;
end

code[x_, y_] := -0.8273960599468214

\begin{array}{l}

\\
-0.8273960599468214
\end{array}

Reproduce

?
herbie shell --seed 2024211 
(FPCore (x y)
  :name "Rump's expression from Stadtherr's award speech"
  :precision binary64
  :pre (and (== x 77617.0) (== y 33096.0))
  (+ (+ (+ (* 333.75 (pow y 6.0)) (* (* x x) (- (- (- (* (* (* (* 11.0 x) x) y) y) (pow y 6.0)) (* 121.0 (pow y 4.0))) 2.0))) (* 5.5 (pow y 8.0))) (/ x (* 2.0 y))))

Please file a bug report with this information.

Backtrace

alt-event: contract violation expected: alt? given: '(#<alt (* -2 (pow x 2))> . #<representation binary64>)LC
alt-eventunknown
get-starting-expr/home/nightlies/herbie/egraph-no-simplify/src/core/mainloop.rkt2572
reconstruct!/home/nightlies/herbie/egraph-no-simplify/src/core/mainloop.rkt2550
run-iter!/home/nightlies/herbie/egraph-no-simplify/src/core/mainloop.rkt890
mutate!/home/nightlies/herbie/egraph-no-simplify/src/core/mainloop.rkt810
run-improve!/home/nightlies/herbie/egraph-no-simplify/src/core/mainloop.rkt660
get-alternatives/report/home/nightlies/herbie/egraph-no-simplify/src/api/sandbox.rkt1620
(unnamed)/home/nightlies/herbie/egraph-no-simplify/src/api/sandbox.rkt2576
(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