Diagrams.Solve.Polynomial:cubForm from diagrams-solve-0.1, G

Specification

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\[\begin{array}{l} \\ \frac{1}{2} \cdot \left(x + y\right) \end{array} \]
(FPCore (x y) :precision binary64 (* (/ 1.0 2.0) (+ x y)))
double code(double x, double y) {
	return (1.0 / 2.0) * (x + y);
}
real(8) function code(x, y)
    real(8), intent (in) :: x
    real(8), intent (in) :: y
    code = (1.0d0 / 2.0d0) * (x + y)
end function
public static double code(double x, double y) {
	return (1.0 / 2.0) * (x + y);
}
def code(x, y):
	return (1.0 / 2.0) * (x + y)
function code(x, y)
	return Float64(Float64(1.0 / 2.0) * Float64(x + y))
end
function tmp = code(x, y)
	tmp = (1.0 / 2.0) * (x + y);
end
code[x_, y_] := N[(N[(1.0 / 2.0), $MachinePrecision] * N[(x + y), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}

\\
\frac{1}{2} \cdot \left(x + y\right)
\end{array}

Reproduce

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herbie shell --seed 2024246 
(FPCore (x y)
  :name "Diagrams.Solve.Polynomial:cubForm  from diagrams-solve-0.1, G"
  :precision binary64

  :alt
  (! :herbie-platform default (/ (+ x y) 2))

  (* (/ 1.0 2.0) (+ x y)))

Please file a bug report with this information.

Backtrace

map: contract violation expected: list? given: '(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 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