'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.