Nealder-Mead fails for Goldman-Price

[tornord]

Any idea why nealder-mead fails for the Goldman-Price function?

Goldman-Price is well behavied and it's usually used as test function.
https://en.wikipedia.org/wiki/Test_functions_for_optimization

var fmin = require("fmin");

// https://en.wikipedia.org/wiki/File:Goldstein_Price_function.pdf
function goldsteinPrice(x, y) {
    return (
        (1 + Math.pow(x + y + 1, 2) * (19 - 14 * x + 3 * x * x - 14 * y + 6 * x * x + 3 * y * y)) * (30 + Math.pow(2 * x - 3 * y, 2) * (18 - 32 * x + 12 * x * x + 48 * y - 36 * x * y + 27 * y * y))
    );
}

// var res = fmin.nelderMead((x) => goldsteinPrice(x[0], x[1]), [0.2, -0.18]); // Works
var res = fmin.nelderMead((x) => goldsteinPrice(x[0], x[1]), [0.2, -0.17]); // Fails
console.log(JSON.stringify(res)); // Should be x=0, y=-1