Eto.Wpf.Drawing.FontHandler.Dispose throws System.NullReferenceException

NullReferenceException.cs

using System;
using Eto.Forms;
using Eto.Drawing;
using System.Diagnostics;
using System.Threading;
using System.Globalization;

namespace ConsoleApplication22
{
    class MyForm : Form
    {
        public MyForm()
        {
            this.ClientSize = new Eto.Drawing.Size(500, 500);
            this.Title = "Hello, Eto.Forms " + Platform.ID;

            var drawable = new Drawable { Size = new Size(700, 600) };

            drawable.Paint += (sender, e) =>
            {
                try
                {
                    var g = e.Graphics;
                    g.Clear(Brushes.White);

                    var brush = new SolidBrush(Colors.Black);
                    var font = new Font("Arial", 14f);
                    g.DrawText(font, brush, new PointF(100f, 100f), "Test");

                    brush.Dispose();
                    font.Dispose();
                }
                catch (Exception ex)
                {
                    Debug.Print(ex.Message);
                    Debug.Print(ex.StackTrace);
                }
            };
            var layout = new PixelLayout();
            layout.Add(drawable, 0, 0);

            Content = layout;
        }
    }

    class Program
    {
        [STAThread]
        static void Main(string[] args)
        {
            new Application(Eto.Platforms.Wpf).Run(new MyForm());
        }
    }
}