WPF in .net core 6.0 or 8.0, process terminated error occured and exit program unexpectly when type korean(IME) character fast in DataGrid.

_This issue has been moved from [a ticket on Developer Community](https://developercommunity.visualstudio.com/t/WPF-in-net-core-60-or-80-process-ter/10750211)._

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[severity:I'm unable to use this version]
[WpfApp1.zip](https://aka.ms/dc/file?name=Bc1b609617e314e2595f62c543cb01215638624260989001388_WpfApp1.zip&tid=c1b609617e314e2595f62c543cb01215638624260989001388)

## instruction
there is very simple code, a sample of datagrid and databinding.

quickly enter Korean while switching cells in datagrid, a 'process terminated' error occurs.

I already post this issue in [microsoft learn](https://learn.microsoft.com/ko-kr/answers/questions/2073836/windows-11-pc-wpf-datagrid?page=1&orderby=Helpful&comment=answer-1833878#newest-answer-comment), but I think o this is lowlevel problem between WPF framework and IME.

Currently, datagrid must be used for development, and the program is easily terminated, which is a problem.

## how to reproduce
1. With the Korean IME running, enter any number of Korean characters (any character does not matter) into a cell of the datagrid.

2. Click another cell and enter Korean again.

3. If an error does not occur, repeat the above actions.

## environments
tested on 3 PC.

occured OS : window 11 home, professional

occured .net version : 6.0.16, 8.0

## error message
```
Application: WpfApp1.exe

CoreCLR Version: 6.0.1623.17311

.NET Version: 6.0.16

Description: The application requested process termination through System.Environment.FailFast(string message).

Message: 복구할 수 없는 시스템 오류입니다.

Stack:

at System.Environment.FailFast(System.String)

at System.Windows.Documents.TextStore.VerifyTextStoreConsistency()

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+ITextStoreACPSink.OnSelectionChange()

at MS. Win32.UnsafeNativeMethods+ITextStoreACPSink.OnSelectionChange()

at System.Windows.Documents.TextStore.OnSelectionChanged()

at System.Windows.Documents.TextSelection.System.Windows.Documents.ITextRange.NotifyChanged(Boolean, Boolean)

at System.Windows.Documents.TextRangeBase.EndChange(System.Windows.Documents.ITextRange, Boolean, Boolean)

at System.Windows.Documents.TextRange.System.Windows.Documents.ITextRange.EndChange(Boolean, Boolean)

at System.Windows.Documents.TextRange+ChangeBlock.System.IDisposable.Dispose()

at System.Windows.Documents.TextEditorTyping.DoTextInput(System.Windows.Documents.TextEditor, System.String, Boolean, Boolean)

at System.Windows.Documents.TextEditorTyping+TextInputItem.Do()

at System.Windows.Documents.TextEditorTyping.ScheduleInput(System.Windows.Documents.TextEditor, InputItem)

at System.Windows.Documents.TextEditorTyping.OnTextInput(System.Object, System.Windows.Input.TextCompositionEventArgs)

at System.Windows.Controls.Primitives.TextBoxBase.OnTextInput(System.Windows.Input.TextCompositionEventArgs)

at System.Windows.UIElement.OnTextInputThunk(System.Object, System.Windows.Input.TextCompositionEventArgs)

at System.Windows.Input.TextCompositionEventArgs.InvokeEventHandler(System.Delegate, System.Object)

at System.Windows.RoutedEventArgs.InvokeHandler(System.Delegate, System.Object)

at System.Windows.EventRoute.InvokeHandlersImpl(System.Object, System.Windows.RoutedEventArgs, Boolean)

at System.Windows.UIElement.RaiseEventImpl(System.Windows.DependencyObject, System.Windows.RoutedEventArgs)

at System.Windows.UIElement.RaiseTrustedEvent(System.Windows.RoutedEventArgs)

at System.Windows.Input.InputManager.ProcessStagingArea()

at System.Windows.Input.TextCompositionManager.UnsafeCompleteComposition(System.Windows.Input.TextComposition)

at System.Windows.Input.DefaultTextStore.OnTransitoryExtensionUpdated(ITfContext, Int32, ITfRange, ITfRange, Boolean ByRef)

at MS. Win32.UnsafeNativeMethods+ITfThreadMgr.SetFocus(ITfDocumentMgr)

at MS. Win32.UnsafeNativeMethods+ITfThreadMgr.SetFocus(ITfDocumentMgr)

at System.Windows.Documents.TextStore.OnGotFocus()

at System.Windows.Documents.TextServicesHost._RegisterTextStore(System.Windows.Documents.TextStore)

at System.Windows.Documents.TextStore.OnAttach()

at System.Windows.Documents.TextEditor.InitTextStore(System.Object)

at System.Windows.Threading.ExceptionWrapper.InternalRealCall(System.Delegate, System.Object, Int32)

at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(System.Object, System.Delegate, System.Object, Int32, System.Delegate)

at System.Windows.Threading.DispatcherOperation.InvokeImpl()

at MS. Internal.CulturePreservingExecutionContext.CallbackWrapper(System.Object)

at System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object)

at MS. Internal.CulturePreservingExecutionContext.Run(MS. Internal.CulturePreservingExecutionContext, System.Threading.ContextCallback, System.Object)

at System.Windows.Threading.DispatcherOperation.Invoke()

at System.Windows.Threading.Dispatcher.ProcessQueue()

at System.Windows.Threading.Dispatcher.WndProcHook(IntPtr, Int32, IntPtr, IntPtr, Boolean ByRef)

at MS. Win32.HwndWrapper.WndProc(IntPtr, Int32, IntPtr, IntPtr, Boolean ByRef)

at MS. Win32.HwndSubclass.DispatcherCallbackOperation(System.Object)

at System.Windows.Threading.ExceptionWrapper.InternalRealCall(System.Delegate, System.Object, Int32)

at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(System.Object, System.Delegate, System.Object, Int32, System.Delegate)

at System.Windows.Threading.Dispatcher.LegacyInvokeImpl(System.Windows.Threading.DispatcherPriority, System.TimeSpan, System.Delegate, System.Object, Int32)

at MS. Win32.HwndSubclass.SubclassWndProc(IntPtr, Int32, IntPtr, IntPtr)

at MS. Win32.UnsafeNativeMethods.DispatchMessage(System.Windows.Interop.MSG ByRef)

at MS. Win32.UnsafeNativeMethods.DispatchMessage(System.Windows.Interop.MSG ByRef)

at System.Windows.Threading.Dispatcher.PushFrameImpl(System.Windows.Threading.DispatcherFrame)

at System.Windows.Threading.Dispatcher.PushFrame(System.Windows.Threading.DispatcherFrame)

at System.Windows.Threading.DispatcherOperation.Wait(System.TimeSpan)

at System.Windows.Threading.Dispatcher.InvokeImpl(System.Windows.Threading.DispatcherOperation, System.Threading.CancellationToken, System.TimeSpan)

at System.Windows.Threading.Dispatcher.Invoke(System.Action, System.Windows.Threading.DispatcherPriority, System.Threading.CancellationToken, System.TimeSpan)

at System.Windows.Threading.Dispatcher.Invoke(System.Action, System.Windows.Threading.DispatcherPriority)

at System.Windows.Controls.DataGridTextColumn.OnInput(System.Windows.Input.InputEventArgs)

at System.Windows.Controls.DataGridCell.OnPreviewKeyDown(System.Windows.Input.KeyEventArgs)

at System.Windows.UIElement.OnPreviewKeyDownThunk(System.Object, System.Windows.Input.KeyEventArgs)

at System.Windows.Input.KeyEventArgs.InvokeEventHandler(System.Delegate, System.Object)

at System.Windows.RoutedEventArgs.InvokeHandler(System.Delegate, System.Object)

at System.Windows.EventRoute.InvokeHandlersImpl(System.Object, System.Windows.RoutedEventArgs, Boolean)

at System.Windows.UIElement.RaiseEventImpl(System.Windows.DependencyObject, System.Windows.RoutedEventArgs)

at System.Windows.UIElement.RaiseTrustedEvent(System.Windows.RoutedEventArgs)

at System.Windows.Input.InputManager.ProcessStagingArea()

at System.Windows.Input.InputProviderSite.ReportInput(System.Windows.Input.InputReport)

at System.Windows.Interop.HwndKeyboardInputProvider.ReportInput(IntPtr, System.Windows.Input.InputMode, Int32, System.Windows.Input.RawKeyboardActions, Int32, Boolean, Boolean, Int32)

at System.Windows.Interop.HwndKeyboardInputProvider.ProcessKeyAction(System.Windows.Interop.MSG ByRef, Boolean ByRef)

at System.Windows.Interop.HwndSource.CriticalTranslateAccelerator(System.Windows.Interop.MSG ByRef, System.Windows.Input.ModifierKeys)

at System.Windows.Interop.HwndSource.OnPreprocessMessage(System.Object)

at System.Windows.Threading.ExceptionWrapper.InternalRealCall(System.Delegate, System.Object, Int32)

at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(System.Object, System.Delegate, System.Object, Int32, System.Delegate)

at System.Windows.Threading.Dispatcher.LegacyInvokeImpl(System.Windows.Threading.DispatcherPriority, System.TimeSpan, System.Delegate, System.Object, Int32)

at System.Windows.Interop.HwndSource.OnPreprocessMessageThunk(System.Windows.Interop.MSG ByRef, Boolean ByRef)

at System.Windows.Interop.ComponentDispatcherThread.RaiseThreadMessage(System.Windows.Interop.MSG ByRef)

at System.Windows.Threading.Dispatcher.PushFrameImpl(System.Windows.Threading.DispatcherFrame)

at System.Windows.Threading.Dispatcher.PushFrame(System.Windows.Threading.DispatcherFrame)

at System.Windows.Threading.Dispatcher.Run()

at System.Windows.Application.RunDispatcher(System.Object)

at System.Windows.Application.RunInternal(System.Windows.Window)

at System.Windows.Application.Run()

at WpfApp1.App.Main()
```

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### Original Comments

#### Feedback Bot on 23/9/2024, 07:51 AM:

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