Exception for Graphics.Rendering.Chart.Plot.AreaSpots:renderSpotLegend from Chart-1.5.3

Specification

\[\begin{array}{l} \\ x + \frac{\left|y - x\right|}{2} \end{array} \]

(FPCore (x y) :precision binary64 (+ x (/ (fabs (- y x)) 2.0)))

double code(double x, double y) {
	return x + (fabs((y - x)) / 2.0);
}

real(8) function code(x, y)
    real(8), intent (in) :: x
    real(8), intent (in) :: y
    code = x + (abs((y - x)) / 2.0d0)
end function

public static double code(double x, double y) {
	return x + (Math.abs((y - x)) / 2.0);
}

def code(x, y):
	return x + (math.fabs((y - x)) / 2.0)

function code(x, y)
	return Float64(x + Float64(abs(Float64(y - x)) / 2.0))
end

function tmp = code(x, y)
	tmp = x + (abs((y - x)) / 2.0);
end

code[x_, y_] := N[(x + N[(N[Abs[N[(y - x), $MachinePrecision]], $MachinePrecision] / 2.0), $MachinePrecision]), $MachinePrecision]

\begin{array}{l}

\\
x + \frac{\left|y - x\right|}{2}
\end{array}

Reproduce

herbie shell --seed 2024238 
(FPCore (x y)
  :name "Graphics.Rendering.Chart.Plot.AreaSpots:renderSpotLegend from Chart-1.5.3"
  :precision binary64
  (+ x (/ (fabs (- y x)) 2.0)))

Please file a bug report with this information.

Backtrace

error: contract violation expected: string? given: 'fabs.f64		L	C
f345	.../match/compiler.rkt	559	40
loop	.../private/map.rkt	40	19
loop	.../private/map.rkt	40	19
loop	.../private/map.rkt	40	19
loop	.../private/map.rkt	40	19
loop	.../private/map.rkt	40	19
compile-expr	/home/nightlies/herbie/bhargav-log-space/src/core/explain.rkt	70	0
explain	/home/nightlies/herbie/bhargav-log-space/src/core/explain.rkt	614	0
explain!	/home/nightlies/herbie/bhargav-log-space/src/core/mainloop.rkt	321	0
run-improve!	/home/nightlies/herbie/bhargav-log-space/src/core/mainloop.rkt	43	0
get-alternatives/report	/home/nightlies/herbie/bhargav-log-space/src/api/sandbox.rkt	184	0
(unnamed)	/home/nightlies/herbie/bhargav-log-space/src/api/sandbox.rkt	280	6
(unnamed)	/usr/local/racket/share/pkgs/profile-lib/main.rkt	40	10
profile-thunk	/usr/local/racket/share/pkgs/profile-lib/main.rkt	9	0
(unnamed)	/usr/local/racket/collects/racket/engine.rkt	42	24