Crash 'Unable to cast object of type 'System.__ComObject' to type 'ITfThreadMgr'.' #6463

jim-jiang-github · 2022-04-20T11:55:46Z

.NET Core Version: 3.1
Windows version: (Windows 10 Pro 19043.1645)
Does the bug reproduce also in WPF for .NET Framework 4.8?: Unknow
Is this bug related specifically to tooling in Visual Studio (e.g. XAML Designer, Code editing, etc...)? No.
Security issues and bugs should be reported privately, learn more via our responsible disclosure guidelines.

Problem description:
Unknown cause.
1.We used WebView2 (1.3.153.51) in our project, We are using WebView2 when the crash happens. I'm not sure if it has anything to do with this.
2.Is it possible that the problem is caused by the Chinese input ?

Actual behavior:

App crash at Dispatcher.GetMessagePump()

It looks like the ‘threadManager’ value is of the wrong type?

Expected behavior:

Minimal repro:

The text was updated successfully, but these errors were encountered:

lindexi · 2022-04-20T13:20:42Z

Could you add the demo ?

jim-jiang-github · 2022-04-20T13:44:39Z

Could you add the demo ?

This crash happened in our company's project, I can't disclose it, it's a once bug found by QA, we can't reproduce this problem at present

singhashish-wpf · 2022-04-25T07:26:31Z

A sample/minimal repro will be required to check this further.

miloush · 2022-04-26T11:05:20Z

The comment in the WPF code suggests this might be due to IME configuration issues which might be challenging to reproduce on other machines.

2.Is it possible that the problem is caused by the Chinese input ?

Yes, Cicero is a text services framework that deals with IMEs.

jim-jiang-github · 2022-04-26T12:13:52Z

The comment in the WPF code suggests this might be due to IME configuration issues which might be challenging to reproduce on other machines.

2.Is it possible that the problem is caused by the Chinese input ?

Yes, Cicero is a text services framework that deals with IMEs.

Is there any way we can catch this exception so far? Or is there any Workaround that can ignore this exception？

lindexi · 2022-04-26T13:07:27Z

Or is there any Workaround that can ignore this exception？

@jim-jiang-github You can disable it by Disable Thread Input Manager. But it is not the good ideas.

How to Disable Thread Input Manager? See https://social.msdn.microsoft.com/Forums/en-US/b464ecfa-1673-4f06-bba0-bf3eacaae9fc/how-do-you-turn-off-the-automation-features-of-windows-speech-recognition?forum=netfxbcl

HKEY_CURRENT_USER\Software\Microsoft\CTF "Disable Thread Input Manager"=dword:00000001

           string keyPath = @"Software\Microsoft\CTF";

            using (RegistryKey key = Registry.CurrentUser.OpenSubKey(keyPath, true))
            {
                key.SetValue("Disable Thread Input Manager", 1);
            }

Why it is not the good ideas? Because the IME can not work or work well after disable Thread Input Manager.

jim-jiang-github · 2022-04-26T13:34:00Z

Or is there any Workaround that can ignore this exception？

@jim-jiang-github You can disable it by Disable Thread Input Manager. But it is not the good ideas.

How to Disable Thread Input Manager? See https://social.msdn.microsoft.com/Forums/en-US/b464ecfa-1673-4f06-bba0-bf3eacaae9fc/how-do-you-turn-off-the-automation-features-of-windows-speech-recognition?forum=netfxbcl

HKEY_CURRENT_USER\Software\Microsoft\CTF "Disable Thread Input Manager"=dword:00000001
           string keyPath = @"Software\Microsoft\CTF";

            using (RegistryKey key = Registry.CurrentUser.OpenSubKey(keyPath, true))
            {
                key.SetValue("Disable Thread Input Manager", 1);
            }
Why it is not the good ideas? Because the IME can not work or work well after disable Thread Input Manager.

Thank you very much, I will try this solution.
And another question is this a bug in WPF?

miloush · 2022-04-26T15:09:20Z

Can you tell us which input methods you enabled or installed? Which OS is this?

lindexi · 2022-04-27T00:32:51Z

And another question is this a bug in WPF?

I don't think so. IME has a hundred ways to crash applications.

miloush · 2022-04-27T00:37:53Z

@lindexi If the IME is valid but does not implement ITfThreadMgr then that is probably for WPF to deal with.

lindexi · 2022-04-27T00:41:04Z

@miloush Sorry, I means that we should not catch it. Because it can crash the application in any code which call the IME. Such as my call stack:

Exception: System.AccessViolationException
   in Lindexi.TextEditor.Editing.ImeNative+ITfThreadMgr.SetFocus(IntPtr)
   in Lindexi.TextEditor.Editing.ImeSupport.CreateContext()
   in Lindexi.TextEditor.Editing.ImeSupport.<.ctor>b__7_0(System.Object, System.Windows.Input.KeyboardFocusChangedEventArgs)
   in System.Windows.Input.KeyboardFocusChangedEventArgs.InvokeEventHandler(System.Delegate, System.Object)
   in System.Windows.RoutedEventArgs.InvokeHandler(System.Delegate, System.Object)
   in System.Windows.RoutedEventHandlerInfo.InvokeHandler(System.Object, System.Windows.RoutedEventArgs)
   in System.Windows.EventRoute.InvokeHandlersImpl(System.Object, System.Windows.RoutedEventArgs, Boolean)
   in System.Windows.UIElement.RaiseEventImpl(System.Windows.DependencyObject, System.Windows.RoutedEventArgs)
   in System.Windows.UIElement.RaiseTrustedEvent(System.Windows.RoutedEventArgs)
   in System.Windows.UIElement.RaiseEvent(System.Windows.RoutedEventArgs, Boolean)
   in System.Windows.Input.InputManager.ProcessStagingArea()
   in System.Windows.Input.InputManager.ProcessInput(System.Windows.Input.InputEventArgs)
   in System.Windows.Input.KeyboardDevice.ChangeFocus(System.Windows.DependencyObject, Int32)
   in System.Windows.Input.KeyboardDevice.TryChangeFocus(System.Windows.DependencyObject, System.Windows.Input.IKeyboardInputProvider, Boolean, Boolean, Boolean)
   in System.Windows.Input.KeyboardDevice.Focus(System.Windows.DependencyObject, Boolean, Boolean, Boolean)
   in System.Windows.Input.KeyboardDevice.Focus(System.Windows.IInputElement)
   in System.Windows.UIElement.Focus()
   in Lindexi.TextEditor.TextEditor.EnterEdit()
   in Lindexi.TextEditor.TextEditor.ChangeIsEditableInner(Boolean)
   in Lindexi.TextEditor.TextEditor.OnIsEditableChanged(System.Windows.DependencyObject, System.Windows.DependencyPropertyChangedEventArgs)
   in System.Windows.DependencyObject.OnPropertyChanged(System.Windows.DependencyPropertyChangedEventArgs)
   in System.Windows.FrameworkElement.OnPropertyChanged(System.Windows.DependencyPropertyChangedEventArgs)
   in Lindexi.TextEditor.TextEditor.OnPropertyChanged(System.Windows.DependencyPropertyChangedEventArgs)
   in System.Windows.DependencyObject.NotifyPropertyChange(System.Windows.DependencyPropertyChangedEventArgs)
   in System.Windows.DependencyObject.UpdateEffectiveValue(System.Windows.EntryIndex, System.Windows.DependencyProperty, System.Windows.PropertyMetadata, System.Windows.EffectiveValueEntry, System.Windows.EffectiveValueEntry ByRef, Boolean, Boolean, System.Windows.OperationType)
   in System.Windows.DependencyObject.SetValueCommon(System.Windows.DependencyProperty, System.Object, System.Windows.PropertyMetadata, Boolean, Boolean, System.Windows.OperationType, Boolean)
   in Lindexi.Doubi.Extensions.NodeContainer.EditText()
   in Lindexi.Doubi.Extensions.SubjectNode.EditText()
   in Lindexi.Doubi.Extensions.DoubiDevice.NodeClick(System.Windows.Input.InputEventArgs, System.Windows.Point)
   in Lindexi.Doubi.Extensions.DoubiDevice.HandleDown(System.Windows.Input.InputEventArgs, System.Windows.Point)
   in Lindexi.Doubi.Extensions.DoubiDevice.Node_OnMouseDown(System.Object, System.Windows.Input.MouseButtonEventArgs)
   in System.Windows.Input.MouseButtonEventArgs.InvokeEventHandler(System.Delegate, System.Object)
   in System.Windows.RoutedEventArgs.InvokeHandler(System.Delegate, System.Object)
   in System.Windows.RoutedEventHandlerInfo.InvokeHandler(System.Object, System.Windows.RoutedEventArgs)
   in System.Windows.EventRoute.InvokeHandlersImpl(System.Object, System.Windows.RoutedEventArgs, Boolean)
   in System.Windows.UIElement.ReRaiseEventAs(System.Windows.DependencyObject, System.Windows.RoutedEventArgs, System.Windows.RoutedEvent)
   in System.Windows.UIElement.OnMouseDownThunk(System.Object, System.Windows.Input.MouseButtonEventArgs)
   in System.Windows.Input.MouseButtonEventArgs.InvokeEventHandler(System.Delegate, System.Object)
   in System.Windows.RoutedEventArgs.InvokeHandler(System.Delegate, System.Object)
   in System.Windows.RoutedEventHandlerInfo.InvokeHandler(System.Object, System.Windows.RoutedEventArgs)
   in System.Windows.EventRoute.InvokeHandlersImpl(System.Object, System.Windows.RoutedEventArgs, Boolean)
   in System.Windows.UIElement.RaiseEventImpl(System.Windows.DependencyObject, System.Windows.RoutedEventArgs)
   in System.Windows.UIElement.RaiseTrustedEvent(System.Windows.RoutedEventArgs)
   in System.Windows.UIElement.RaiseEvent(System.Windows.RoutedEventArgs, Boolean)
   in System.Windows.Input.InputManager.ProcessStagingArea()
   in System.Windows.Input.InputManager.ProcessInput(System.Windows.Input.InputEventArgs)
   in System.Windows.Input.InputProviderSite.ReportInput(System.Windows.Input.InputReport)
   in System.Windows.Interop.HwndMouseInputProvider.ReportInput(IntPtr, System.Windows.Input.InputMode, Int32, System.Windows.Input.RawMouseActions, Int32, Int32, Int32)
   in System.Windows.Interop.HwndMouseInputProvider.FilterMessage(IntPtr, MS.Internal.Interop.WindowMessage, IntPtr, IntPtr, Boolean ByRef)
   in System.Windows.Interop.HwndSource.InputFilterMessage(IntPtr, Int32, IntPtr, IntPtr, Boolean ByRef)
   in MS.Win32.HwndWrapper.WndProc(IntPtr, Int32, IntPtr, IntPtr, Boolean ByRef)
   in MS.Win32.HwndSubclass.DispatcherCallbackOperation(System.Object)
   in System.Windows.Threading.ExceptionWrapper.InternalRealCall(System.Delegate, System.Object, Int32)
   in System.Windows.Threading.ExceptionWrapper.TryCatchWhen(System.Object, System.Delegate, System.Object, Int32, System.Delegate)
   in System.Windows.Threading.Dispatcher.LegacyInvokeImpl(System.Windows.Threading.DispatcherPriority, System.TimeSpan, System.Delegate, System.Object, Int32)
   in MS.Win32.HwndSubclass.SubclassWndProc(IntPtr, Int32, IntPtr, IntPtr)
   in MS.Win32.UnsafeNativeMethods.DispatchMessage(System.Windows.Interop.MSG ByRef)
   in System.Windows.Threading.Dispatcher.PushFrameImpl(System.Windows.Threading.DispatcherFrame)
   in System.Windows.Threading.Dispatcher.PushFrame(System.Windows.Threading.DispatcherFrame)
   in System.Windows.Application.RunDispatcher(System.Object)
   in System.Windows.Application.RunInternal(System.Windows.Window)
   in System.Windows.Application.Run(System.Windows.Window)
   in Lindexi.Doubi.Shell.Program.Main(System.String[])
   in Lindexi.Doubi.Program.Main(System.String[])

See my Chinese blog: https://blog.lindexi.com/post/WPF-%E8%A2%AB%E8%BE%93%E5%85%A5%E6%B3%95%E5%B8%A6%E5%B4%A9%E8%BF%9B%E7%A8%8B.html

jim-jiang-github · 2022-04-27T02:16:39Z

Can you tell us which input methods you enabled or installed? Which OS is this?

We installed Microsoft Chinese input, but we are not sure whether the Chinese input method was enabled when crash happened.

miloush · 2022-05-06T11:24:42Z

@lindexi so do you have a repro? I tried to type into a TextBox using Microsoft Pinyin and nothing happened.

lindexi · 2022-05-06T11:41:30Z

@miloush It's hard to give you a repro... Unless I find a user's computer for you remotely

miloush · 2022-05-06T11:43:09Z

@lindexi which input method at least?

lindexi · 2022-05-06T11:45:34Z

@miloush As my blog says, the Sogou input (搜狗输入法) may crash the application.

kant2002 · 2022-05-20T13:40:06Z

@lindexi I have only one idea, how can ITfThreadMgr maybe not implemented, and at the same time everything working for the user. Maybe Sogou input implement only ITfThreadMgr2 ? If you can try call TF_CreateThreadMgr and try to convert _ComObject to ITfThreadMgr2 ?

miloush · 2022-05-20T13:46:25Z

@kant2002 Doesn't ITfThreadMgr2 implement ITfThreadMgr?

kant2002 · 2022-05-20T13:57:32Z

If you implement properly, you usually implement 2 interfaces (IID), one for ITfThreadMgr and one for ITfThreadMgr2, but that not required strictly speaking. And if MS implement text services to query ITfThreadMgr2 first and fallback to old compatibility mode if it's missing, maybe that's make sense. That's pretty wild guess on my side, but we have pretty strange issue.

ThomasGoulet73 · 2022-06-23T02:43:56Z

According to the Windows SDK, ITfThreadMgr2 does not implement ITfThreadMgr (They do not share the same vtbl). It seems that even though ITfThreadMgr2 does not implement ITfThreadMgr, you can call QueryInterface with ITfThreadMgr2 on a ITfThreadMgr pointer. So if the pointer returned by TF_CreateThreadMgr is ITfThreadMgr2 it could cause this type of exception. I don't know if this is the case here because it would be very weird since TF_CreateThreadMgr returns ITfThreadMgr according to the SDK. I'm not setup to try it since it looks like it requires specific input but if anyone can try to cast everything to ITfThreadMgr2 before using the instance of the COM object it would be great.

lindexi · 2022-07-29T03:11:03Z

I find the other call stack break the application

   at System.Environment.FailFast(System.String)
   at MS.Internal.Invariant.FailFast(System.String, System.String)
   at System.Windows.Documents.TextStore.OnUpdateComposition(ITfCompositionView, ITfRange)
   at MS.Win32.UnsafeNativeMethods+ITextStoreACPSink.OnLockGranted(LockFlags)
   at System.Windows.Documents.TextStore.GrantLock()
   at System.Windows.Documents.TextStore.GrantLockWorker(LockFlags)
   at System.Windows.Documents.TextStore.RequestLock(LockFlags, Int32 ByRef)
   at MS.Win32.UnsafeNativeMethods+ITfKeystrokeMgr.TestKeyDown(Int32, Int32, Boolean ByRef)
   at System.Windows.Input.TextServicesContext.Keystroke(Int32, Int32, KeyOp)
   at System.Windows.Input.TextServicesManager.TextServicesKeystroke(System.Windows.Input.TextServicesContext, System.Windows.Input.KeyEventArgs, Boolean)
   at System.Windows.Input.TextServicesManager.PreProcessInput(System.Object, System.Windows.Input.PreProcessInputEventArgs)
   at System.Windows.Input.InputManager.ProcessStagingArea()
   at System.Windows.Input.InputManager.ProcessInput(System.Windows.Input.InputEventArgs)

jim-jiang-github · 2022-08-01T08:17:44Z

I found another crash error info here.

And stack:
at System.StubHelpers.StubHelpers.GetCOMIPFromRCW(Object objSrc, IntPtr pCPCMD, IntPtr& ppTarget, Boolean& pfNeedsRelease)
at MS.Win32.UnsafeNativeMethods.ITextStoreACPSink.OnLayoutChange(TsLayoutCode lcode, Int32 viewCookie)
at System.Windows.Documents.TextStore.OnLayoutUpdated()
at System.Windows.Documents.TextEditor.OnTextViewUpdatedWorker(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.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 System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
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()

Norc89 · 2023-04-04T06:01:57Z

Hi,
Is here any improvement i start getting similar crashes after we make redesign of our app.

CurrentDomainOnUnhandledException The application is terminating.:Exception message:Unable to cast object of type 'System.__ComObject' to type 'ITfThreadMgr'. Exception stackTrace: at System.StubHelpers.StubHelpers.GetCOMIPFromRCW(Object objSrc, IntPtr pCPCMD, IntPtr& ppTarget, Boolean& pfNeedsRelease) at MS.Win32.UnsafeNativeMethods.ITfThreadMgr.Deactivate() at System.Windows.Input.TextServicesContext.Uninitialize(Boolean appDomainShutdown) at System.Windows.Input.TextServicesContext.TextServicesContextShutDownListener.OnShutDown(Object target, Object sender, EventArgs e) at MS.Internal.ShutDownListener.HandleShutDown(Object sender, EventArgs e) at System.EventHandler.Invoke(Object sender, EventArgs e) at System.Windows.Threading.Dispatcher.ShutdownImplInSecurityContext(Object state) at MS.Internal.CulturePreservingExecutionContext.CallbackWrapper(Object obj) at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx) at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx) at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state) at MS.Internal.CulturePreservingExecutionContext.Run(CulturePreservingExecutionContext executionContext, ContextCallback callback, Object state) at System.Windows.Threading.Dispatcher.ShutdownImpl() 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 MsaBrowserWPF.App.Main()

And

   CurrentOnDispatcherUnhandledException :Exception message:Error HRESULT E_FAIL has been returned from a call to a COM component.
Exception stackTrace:   at MS.Win32.UnsafeNativeMethods.ITfDocumentMgr.Pop(PopFlags flags)
   at System.Windows.Documents.TextServicesHost.OnUnregisterTextStore(Object arg)
   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)

According to previuse version off application i have made update of WPF Material Design.

lindexi · 2023-04-04T06:21:55Z

@Norc89 What is your IME ?

Norc89 · 2023-04-04T07:01:09Z

We are using TabTipAutomation to connect Virtual keyboard with our system.

TabTipAutomation.IgnoreHardwareKeyboard = HardwareKeyboardIgnoreOptions.IgnoreAll; TabTipAutomation.BindTo<TextBox>(); TabTipAutomation.BindTo<RichTextBox>(); TabTipAutomation.ExceptionCatched += TabTipAutomation_ExceptionCatched; TabTip.Closed += TabTip_Closed; TabTip.Opened += WpfTabTipTouch_Opened;

And check if virtualApp is running.
public static bool StartKeyboardApp(bool force) { try { var runningProcessByName = Process.GetProcessesByName("TabTip"); _logger.Error("TabTip instances count:" + runningProcessByName.Length + " Force:" + force.ToString()); if (runningProcessByName.Length == 0 || force) { _logger.Error("TabTip started try to start"); var result = Process.Start(@"C:\Program Files\Common Files\microsoft shared\ink\TabTip.exe"); _logger.Error("TabTip started"); return true; } else _logger.Error("TabTip is already running:"); } catch (Exception exc) { _logger.Error("TabTip exception on start" + exc.ToString()); } return false; }

lindexi · 2023-04-04T07:12:18Z

@Norc89 This is an interesting way, because I never thought about Virtual keyboard.

Norc89 · 2023-04-04T07:19:37Z

@Norc89 This is an interesting way, because I never thought about Virtual keyboard.

Yes we have touch application, this is the reason why we user virtual keyboard.

lindexi · 2023-04-05T09:59:09Z

@Norc89 Sorry, I can not reproduce it by virtual keyboard. I think I need to try more devices and systems.

Norc89 · 2023-04-12T11:15:58Z

y, I means that we should not catch it. Because it can crash the application in any code which call the IME. Such as my call stack:

Does you have in mind any work around for this ? Because error happen on production machines after some time of use. It's not possible to reproduce it in office.

lindexi · 2023-04-12T11:49:10Z

@Norc89 Sorry I don't know how to fix this isseus except to change the IME

jim-jiang-github · 2023-05-07T01:59:28Z

@lindexi
The root cause of the problem we ultimately discovered was that we used 'CoInitialize' and 'UnCoInitialize' in C++ and called them through C++/CLI, but they did not appear in pairs, which ultimately led to this crash.

lindexi · 2023-05-07T02:03:46Z

@jim-jiang-github Do you mean call the CoInitialize twice without call the UnCoInitialize?

jim-jiang-github · 2023-05-07T02:05:57Z

@jim-jiang-github Do you mean call the CoInitialize twice without call the UnCoInitialize?

Yes. Alternatively, you can reproduce this issue by making multiple calls to CoInitialize in the code.

jim-jiang-github added Requires WPF team triage Untriaged labels Apr 20, 2022

singhashish-wpf added Needs minimal repro project and removed Untriaged Requires WPF team triage labels Apr 25, 2022

lindexi mentioned this issue May 20, 2022

First stab at ComWrappers usage in the WPF #6606

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AutoCompleteTextBox 中文输入会崩溃 HandyOrg/HandyControl#1160

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WPF IPimcManager2.GetTablet throw COMException #5774

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karelz added this to the Future milestone Sep 15, 2023

lindexi mentioned this issue Feb 20, 2024

Crash occurs when building RichTextBox instances in the NetCore 3.1 environment on Windows 11 #8827

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Crash 'Unable to cast object of type 'System.__ComObject' to type 'ITfThreadMgr'.' #6463

Crash 'Unable to cast object of type 'System.__ComObject' to type 'ITfThreadMgr'.' #6463

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Crash 'Unable to cast object of type 'System.__ComObject' to type 'ITfThreadMgr'.' #6463

Crash 'Unable to cast object of type 'System.__ComObject' to type 'ITfThreadMgr'.' #6463

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