Exception for xlohi (overflows)

Specification

\[lo < -1 \cdot 10^{+308} \land hi > 10^{+308}\]

\[\begin{array}{l} \\ \frac{x - lo}{hi - lo} \end{array} \]

(FPCore (lo hi x) :precision binary64 (/ (- x lo) (- hi lo)))

double code(double lo, double hi, double x) {
	return (x - lo) / (hi - lo);
}

real(8) function code(lo, hi, x)
    real(8), intent (in) :: lo
    real(8), intent (in) :: hi
    real(8), intent (in) :: x
    code = (x - lo) / (hi - lo)
end function

public static double code(double lo, double hi, double x) {
	return (x - lo) / (hi - lo);
}

def code(lo, hi, x):
	return (x - lo) / (hi - lo)

function code(lo, hi, x)
	return Float64(Float64(x - lo) / Float64(hi - lo))
end

function tmp = code(lo, hi, x)
	tmp = (x - lo) / (hi - lo);
end

code[lo_, hi_, x_] := N[(N[(x - lo), $MachinePrecision] / N[(hi - lo), $MachinePrecision]), $MachinePrecision]

\begin{array}{l}

\\
\frac{x - lo}{hi - lo}
\end{array}

Reproduce

herbie shell --seed 2024039 
(FPCore (lo hi x)
  :name "xlohi (overflows)"
  :precision binary64
  :pre (and (< lo -1e+308) (> hi 1e+308))
  (/ (- x lo) (- hi lo)))

Please file a bug report with this information.

Backtrace

member: not a proper list in: 1		L	C
gather-multiplicative-terms	/home/nightlies/herbie/sound-rules/src/core/reduce.rkt	125	0
simplify-node*	/home/nightlies/herbie/sound-rules/src/core/reduce.rkt	84	0
hash-ref!	/usr/local/racket/collects/racket/private/more-scheme.rkt	377	2
hash-ref!	/usr/local/racket/collects/racket/private/more-scheme.rkt	377	2
approximate	/home/nightlies/herbie/sound-rules/src/core/taylor.rkt	7	0
taylor-expr	/home/nightlies/herbie/sound-rules/src/patch.rkt	89	0
taylor-alt	/home/nightlies/herbie/sound-rules/src/patch.rkt	96	0
gen-series!	/home/nightlies/herbie/sound-rules/src/patch.rkt	109	0
patch-table-run	/home/nightlies/herbie/sound-rules/src/patch.rkt	257	0
(unnamed)	/usr/local/racket/collects/racket/contract/private/arrow-val-first.rkt	486	18
run-iter!	/home/nightlies/herbie/sound-rules/src/mainloop.rkt	288	0
mutate!	/home/nightlies/herbie/sound-rules/src/mainloop.rkt	340	0
run-improve!	/home/nightlies/herbie/sound-rules/src/mainloop.rkt	326	0
get-alternatives/report	/home/nightlies/herbie/sound-rules/src/sandbox.rkt	169	0
(unnamed)	/home/nightlies/herbie/sound-rules/src/sandbox.rkt	262	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