HandleError问题

    [HandleFtmsError]
    public ActionResult PerformanceChart(ChartViewModel chart)
    {
        var x = 1;
        var y = 0;
        var z = x/y;
        return Json("");
    }

HaneleFtmsError

public class HandleFtmsErrorAttribute : System.Web.Mvc.HandleErrorAttribute
{
    public override void OnException(ExceptionContext context)
    {
        base.OnException(context);
        if (context.ExceptionHandled)
            RaiseErrorSignal(context.Exception);
    }

    private static void RaiseErrorSignal(Exception e)
    {
        var context = HttpContext.Current;
        ErrorSignal.FromContext(context).Raise(e, context);
    }
}