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 2024246 
(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

map: contract violation expected: list? given: '((*.f64 (*.f64 (*.f64 #s(literal 11 binary64) x) x) y) . #hasheq((errs . (1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 ...LC
gen-map/usr/local/racket/collects/racket/private/map.rkt2572
actual-errors/home/nightlies/herbie/zane-concrete-values/src/core/explain.rkt350
generate-timelines/home/nightlies/herbie/zane-concrete-values/src/core/explain.rkt4930
explain!/home/nightlies/herbie/zane-concrete-values/src/core/mainloop.rkt3220
run-improve!/home/nightlies/herbie/zane-concrete-values/src/core/mainloop.rkt440
get-alternatives/report/home/nightlies/herbie/zane-concrete-values/src/api/sandbox.rkt1860
(unnamed)/home/nightlies/herbie/zane-concrete-values/src/api/sandbox.rkt2826
(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