Getting Outlines.Count throws TargetInvocationException and Inner Exception: Destination Array expected.

[Cobse]

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Resources

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Reporting an Issue Here

Expected Behavior

When trying to get the bookmark count I expect to get some kind of PdfOutlineCollection object (maybe nested?). Instead I get an exception. See the attached picture.

Actual Behavior

System.Reflection.TargetInvocationException

Inner Exception 1: Exception: Destination Array expected

Call stack:

System.Reflection.TargetInvocationException
  HResult=0x80131604
  Message=Exception has been thrown by the target of an invocation.
  Source=mscorlib
  StackTrace:
   at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor)
   at System.Reflection.RuntimeConstructorInfo.Invoke(BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
   at PdfSharp.Pdf.PdfDictionary.DictionaryElements.CreateDictionary(Type type, PdfDictionary oldDictionary)
   at PdfSharp.Pdf.PdfDictionary.DictionaryElements.GetValue(String key, VCF options)
   at PdfSharp.Pdf.Advanced.PdfCatalog.get_Outlines()
   at PdfSharp.Pdf.PdfDocument.get_Outlines()
   at PdfTools.Models.PdfSharpHelper.MergePDFsWithBookmarks(String targetPath, String[] pdfs) in E:\GitHub\PdfTools\Models\PdfSharpHelper.cs:line 52
   at PdfTools.ViewModels.MainViewModel.MergePdfs() in E:\GitHub\PdfTools\ViewModels\MainViewModel.cs:line 40
   at PdfTools.ViewModels.MainViewModel.<get_MergePdfsCommand>b__14_0() in E:\GitHub\PdfTools\ViewModels\MainViewModel.cs:line 32
   at Utilities.CommandHandler.Execute(Object parameter) in E:\GitHub\Utilities\Utils\Commands.cs:line 31
   at MS.Internal.Commands.CommandHelpers.CriticalExecuteCommandSource(ICommandSource commandSource, Boolean userInitiated)
   at System.Windows.Controls.Primitives.ButtonBase.OnClick()
   at System.Windows.Controls.Button.OnClick()
   at System.Windows.Controls.Primitives.ButtonBase.OnMouseLeftButtonUp(MouseButtonEventArgs e)
   at System.Windows.UIElement.OnMouseLeftButtonUpThunk(Object sender, MouseButtonEventArgs e)
   at System.Windows.Input.MouseButtonEventArgs.InvokeEventHandler(Delegate genericHandler, Object genericTarget)
   at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)
   at System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs)
   at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
   at System.Windows.UIElement.ReRaiseEventAs(DependencyObject sender, RoutedEventArgs args, RoutedEvent newEvent)
   at System.Windows.UIElement.OnMouseUpThunk(Object sender, MouseButtonEventArgs e)
   at System.Windows.Input.MouseButtonEventArgs.InvokeEventHandler(Delegate genericHandler, Object genericTarget)
   at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)
   at System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs)
   at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
   at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args)
   at System.Windows.UIElement.RaiseTrustedEvent(RoutedEventArgs args)
   at System.Windows.UIElement.RaiseEvent(RoutedEventArgs args, Boolean trusted)
   at System.Windows.Input.InputManager.ProcessStagingArea()
   at System.Windows.Input.InputManager.ProcessInput(InputEventArgs input)
   at System.Windows.Input.InputProviderSite.ReportInput(InputReport inputReport)
   at System.Windows.Interop.HwndMouseInputProvider.ReportInput(IntPtr hwnd, InputMode mode, Int32 timestamp, RawMouseActions actions, Int32 x, Int32 y, Int32 wheel)
   at System.Windows.Interop.HwndMouseInputProvider.FilterMessage(IntPtr hwnd, WindowMessage msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
   at System.Windows.Interop.HwndSource.InputFilterMessage(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
   at MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
   at MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o)
   at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
   at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)
   at System.Windows.Threading.Dispatcher.LegacyInvokeImpl(DispatcherPriority priority, TimeSpan timeout, Delegate method, Object args, Int32 numArgs)
   at MS.Win32.HwndSubclass.SubclassWndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam)
   at MS.Win32.UnsafeNativeMethods.DispatchMessage(MSG& msg)
   at System.Windows.Threading.Dispatcher.PushFrameImpl(DispatcherFrame frame)
   at System.Windows.Threading.Dispatcher.PushFrame(DispatcherFrame frame)
   at System.Windows.Application.RunDispatcher(Object ignore)
   at System.Windows.Application.RunInternal(Window window)
   at System.Windows.Application.Run(Window window)
   at System.Windows.Application.Run()
   at PdfTools.App.Main()

  This exception was originally thrown at this call stack:
    PdfSharp.Pdf.PdfOutline.Initialize()
    PdfSharp.Pdf.PdfOutline.InitializeChildren()
    PdfSharp.Pdf.PdfOutline.Initialize()
    PdfSharp.Pdf.PdfOutline.PdfOutline(PdfSharp.Pdf.PdfDictionary)

Inner Exception 1:
Exception: Destination Array expected.

Steps to Reproduce the Behavior

The pdf is something I've received externally and can't share it. It is produced with Python and TeX somehow. Maybe LaTeX or some other engine.

We strongly recommend using the IssueSubmissionTemplate to make sure we can replicate the issue.
https://docs.pdfsharp.net/General/IssueReporting.html

[Cobse]

I will try to use the template to provide better test oppurtunities.

[Cobse]

document.pdf

This pdf throws the same error.

[Cobse]

Code to reproduce.

var pdfPath = "document.pdf";
PdfDocument inputDocument = PdfReader.Open(pdfPath, PdfDocumentOpenMode.Import);
var outlinesCount = inputDocument.Outlines.Count;
 

[Kombuchelada]

I'm also seeing this issue when I try to do doc.Outlines.Clear() on some similar PDFs.

[Kombuchelada]

Some more info for the person that works on this. The issue in my case presents when attempting to open then immediately clear the outline when the pdf being opened has a very large number of oultine entries. If I await Task.Delay(500); before clearing outlines, the issue goes away.