Massive memory leak org.htmlunit.corejs.javascript.Arguments$ThrowTypeError #943

Using latest 4.10.0 the plain vanilla code below leaks the above objects when running with Javascript enabled for longer periods of time. The silent error handler and exception suppression do not help. Memory leaked is about 200M / hour / JS executor. Different websites tried.

webClient = new WebClient(BrowserVersion.FIREFOX); page = webClient.getPage(url);