?

\[x + \frac{y \cdot \left(z - t\right)}{a - t} \]
(FPCore (x y z t a) :precision binary64 (+ x (/ (* y (- z t)) (- a t))))
double code(double x, double y, double z, double t, double a) {
	return x + ((y * (z - t)) / (a - t));
}
real(8) function code(x, y, z, t, a)
    real(8), intent (in) :: x
    real(8), intent (in) :: y
    real(8), intent (in) :: z
    real(8), intent (in) :: t
    real(8), intent (in) :: a
    code = x + ((y * (z - t)) / (a - t))
end function
public static double code(double x, double y, double z, double t, double a) {
	return x + ((y * (z - t)) / (a - t));
}
def code(x, y, z, t, a):
	return x + ((y * (z - t)) / (a - t))
function code(x, y, z, t, a)
	return Float64(x + Float64(Float64(y * Float64(z - t)) / Float64(a - t)))
end
function tmp = code(x, y, z, t, a)
	tmp = x + ((y * (z - t)) / (a - t));
end
code[x_, y_, z_, t_, a_] := N[(x + N[(N[(y * N[(z - t), $MachinePrecision]), $MachinePrecision] / N[(a - t), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]
x + \frac{y \cdot \left(z - t\right)}{a - t}

Reproduce?

Please include this information when filing a bug report:

herbie shell --seed 2023033 
(FPCore (x y z t a)
  :name "Graphics.Rendering.Plot.Render.Plot.Axis:renderAxisTicks from plot-0.2.3.4, B"
  :precision binary64

  :herbie-target
  (+ x (/ y (/ (- a t) (- z t))))

  (+ x (/ (* y (- z t)) (- a t))))

Backtrace

map: contract violation expected: list? given: #<eof>LC
gen-map/usr/share/racket/collects/racket/private/map.rkt2572
run-egglog/home/nightlies/herbie/oflatt-egglog-ctx/src/egglog/run-egglog.rkt14560
run-simplify-input/home/nightlies/herbie/oflatt-egglog-ctx/src/core/simplify.rkt730
simplify-batch/home/nightlies/herbie/oflatt-egglog-ctx/src/core/simplify.rkt480
(unnamed)/usr/share/racket/collects/racket/contract/private/arrow-higher-order.rkt37933
simplify!/home/nightlies/herbie/oflatt-egglog-ctx/src/patch.rkt2460
patch-table-run/home/nightlies/herbie/oflatt-egglog-ctx/src/patch.rkt3180
(unnamed)/usr/share/racket/collects/racket/contract/private/arrow-val-first.rkt48618
run-iter!/home/nightlies/herbie/oflatt-egglog-ctx/src/mainloop.rkt2620
mutate!/home/nightlies/herbie/oflatt-egglog-ctx/src/mainloop.rkt3720
run-improve!/home/nightlies/herbie/oflatt-egglog-ctx/src/mainloop.rkt3200
run-herbie/home/nightlies/herbie/oflatt-egglog-ctx/src/sandbox.rkt570
(unnamed)/home/nightlies/herbie/oflatt-egglog-ctx/src/sandbox.rkt1336
(unnamed)/usr/share/racket/pkgs/profile-lib/main.rkt4010
profile-thunk/usr/share/racket/pkgs/profile-lib/main.rkt90
(unnamed)/usr/share/racket/collects/racket/engine.rkt4224