ActionScript 3.0 :: Get URL From LoaderInfo IOErrorEvent

I'm loading an image with Loader class, adding a listener to its LoaderInfo object like this:

ActionScript Code:
var loader:Loader = new Loader();
loader.contentLoaderInfo.addEventListener(IOErrorEvent.IO_ERROR, ioErrorHandler);
var req:URLRequest = new URLRequest("myUrl.jpg");
loader.load(req);

Then of course I have a function ioErrorHandler. How can I get the url within that error handler?

The IOErrorEvent doesn't have something like a url property, nore does the LoaderInfo has one. Well, I just though of getting my Loader object back within the error handler like this:

ActionScript Code:
function ioErrorHandler(event:Event){
trace(event.target.loader);
}

But well... I get runtime error #2099. The Loader object is not available in ioErrorEvent. Do I really need to parse the url from IOErrorEvent.message?