[Low Priority] System.InvalidCastException: Unable to cast object of type 'System.Security.Principal.SecurityIdentifier' to type 'System.Security.Principal.NTAccount'.

[Tha14]

Hello, I am using alpha 6(also tested with alpha 7) and I get the below error for compact gui:

Application: CompactGUI.exe
CoreCLR Version: 6.0.522.21309
.NET Version: 6.0.5
Description: The process was terminated due to an unhandled exception.
Exception Info: System.InvalidCastException: Unable to cast object of type 'System.Security.Principal.SecurityIdentifier' to type 'System.Security.Principal.NTAccount'.
   at CompactGUI.Core.Analyser.HasDirectoryWritePermission()
   at CompactGUI.MainViewModel.AnalyseBegin()
   at System.Threading.Tasks.Task.<>c.<ThrowAsync>b__128_0(Object state)
   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.DispatcherOperation.InvokeImpl()
   at MS.Internal.CulturePreservingExecutionContext.CallbackWrapper(Object obj)
   at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)
--- End of stack trace from previous location ---
   at MS.Internal.CulturePreservingExecutionContext.Run(CulturePreservingExecutionContext executionContext, ContextCallback callback, Object state)
   at System.Windows.Threading.DispatcherOperation.Invoke()
   at System.Windows.Threading.Dispatcher.ProcessQueue()
   at System.Windows.Threading.Dispatcher.WndProcHook(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.Threading.Dispatcher.Run()
   at System.Windows.Application.RunDispatcher(Object ignore)
   at System.Windows.Application.RunInternal(Window window)
   at System.Windows.Application.Run()
   at CompactGUI.Application.Main()

I read the code and I think this just needs proper handling. The error occurs for a drive letter only so I am not sure what's different at the moment in order to fix my core issue. Cheers

[Tha14]

Found out why it happened. It turns out in the drive's permissions I had an "Account unknown {SID}". After I removed that account compact gui allowed me to analyze my directories. Would be good to have a messagebox with information shown when System.Security.Principal.SecurityIdentifier is returned if there is no easy way to handle this. Cheers @ImminentFate

[Iridium-IO]

Thank you so much for this, I spent hours trying to work out what could be causing the error but couldn't replicate it.