Pdfmod is crashing when opening the attached document:

    [1 Debug 09:28:40.824] Loaded /home/largo/tmp/dkr.pdf
    Exception in Gtk# callback delegate
      Note: Applications can use GLib.ExceptionManager.UnhandledException to handle the exception.
    System.InvalidOperationException: Indirect reference without value.
      at PdfSharp.Pdf.PdfDictionary+DictionaryElements.GetValue (System.String key, VCF options) [0x00000] in <filename unknown>:0
      at PdfSharp.Pdf.Advanced.PdfCatalog.get_Outlines () [0x00000] in <filename unknown>:0
      at PdfSharp.Pdf.PdfDocument.get_Outlines () [0x00000] in <filename unknown>:0
      at PdfMod.Gui.BookmarkView.SetDocument (PdfMod.Pdf.Document new_doc) [0x00000] in <filename unknown>:0
      at PdfMod.Gui.Client+<LoadPath>c__AnonStorey10.<>m__22 () [0x00000] in <filename unknown>:0
      at Hyena.ThreadAssist+<BlockingProxyToMain>c__AnonStoreyF.<>m__4 () [0x00000] in <filename unknown>:0
      at PdfMod.Gui.Client+<RunIdle>c__AnonStorey14.<>m__21 () [0x00000] in <filename unknown>:0
      at GLib.Idle+IdleProxy.Handler () [0x00000] in <filename unknown>:0
       at GLib.ExceptionManager.RaiseUnhandledException(System.Exception e, Boolean is_terminal)
       at GLib.Idle+IdleProxy.Handler()
       at Gtk.Application.gtk_main()
       at Gtk.Application.Run()
       at PdfMod.Gui.Client..ctor(Boolean loadFiles)
       at PdfMod.PdfMod.Main(System.String[] args)
    drichard@linux-xmvz:/usr/local/bin>