Exception for Numeric.SpecFunctions:invIncompleteBetaWorker from math-functions-0.1.5.2, H

• 24.5% of points produce a very large (infinite) output. You may want to add a precondition.

Specification

Math

\[\begin{array}{l} \\ \frac{x \cdot x - 3}{6} \end{array} \]

FPCore

(FPCore (x) :precision binary64 (/ (- (* x x) 3.0) 6.0))

C

double code(double x) {
	return ((x * x) - 3.0) / 6.0;
}

Fortran

real(8) function code(x)
    real(8), intent (in) :: x
    code = ((x * x) - 3.0d0) / 6.0d0
end function

Java

public static double code(double x) {
	return ((x * x) - 3.0) / 6.0;
}

Python

def code(x):
	return ((x * x) - 3.0) / 6.0

Julia

function code(x)
	return Float64(Float64(Float64(x * x) - 3.0) / 6.0)
end

MATLAB

function tmp = code(x)
	tmp = ((x * x) - 3.0) / 6.0;
end

Wolfram

code[x_] := N[(N[(N[(x * x), $MachinePrecision] - 3.0), $MachinePrecision] / 6.0), $MachinePrecision]

Reproduce

herbie shell --seed 2024276 
(FPCore (x)
  :name "Numeric.SpecFunctions:invIncompleteBetaWorker from math-functions-0.1.5.2, H"
  :precision binary64
  (/ (- (* x x) 3.0) 6.0))

Please file a bug report with this information.

Backtrace

match-define: no matching clause for (ddlf +nan.0 +nan.0 #t 1275.9304264640693 1.1460180160558566e-14)		L	C
logabs	/home/nightlies/herbie/bhargav-log-space/src/core/logspace.rkt	189	0
representable?	/home/nightlies/herbie/bhargav-log-space/src/core/logspace.rkt	65	0
f149	.../match/compiler.rkt	559	40
predict-errors	/home/nightlies/herbie/bhargav-log-space/src/core/explain.rkt	102	0
explain	/home/nightlies/herbie/bhargav-log-space/src/core/explain.rkt	712	0
explain!	/home/nightlies/herbie/bhargav-log-space/src/core/mainloop.rkt	323	0
run-improve!	/home/nightlies/herbie/bhargav-log-space/src/core/mainloop.rkt	45	0
get-alternatives/report	/home/nightlies/herbie/bhargav-log-space/src/api/sandbox.rkt	186	0
(unnamed)	/home/nightlies/herbie/bhargav-log-space/src/api/sandbox.rkt	282	6
(unnamed)	/usr/share/racket/pkgs/profile-lib/main.rkt	40	10
profile-thunk	/usr/share/racket/pkgs/profile-lib/main.rkt	9	0
(unnamed)	/usr/share/racket/collects/racket/engine.rkt	42	24