'EcmaScript.NET.EcmaScriptRuntimeException'{"syntax error"}

[crwagner]

I'm getting this exception when proccessing the following javascript function

arrayGroupBy: function(xs, key) {
    return xs.reduce(function(rv, x) {
        var v = key instanceof Function ? key(x) : x[key];
        // this line below throws the exception
        var el = rv.find((r) => r && r.key === v);
        if (el) {
            el.values.push(x);
        } else {
            rv.push({ key: v, values: [x] });
        }
        return rv;
    }, []);
}

[AlexCuse]

What version are you using? This is likely a YUI / ECMAScript issue that might be resolved by updating SquishIt.

I usually prefer YUI but you can also try using the AjaxMin minifiers.