Visual Studio 17 Preview 3.1 locked up in F# project

[vsfeedback]

This issue has been moved from a ticket on Developer Community.

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I'm not sure what exactly triggered it, I had the git diff of a .fsx file open.

! [image.png] (https://aka.ms/dc/image?name=Ba1e418d045ba4fd58f8b5b6c0f73f59c637653357123632815_20210823-191511-image.png&tid=a1e418d045ba4fd58f8b5b6c0f73f59c637653357123632815)

! [image.png] (https://aka.ms/dc/image?name=B077d6802e45c46379d50521c82d6061f637653357339150573_20210823-191532-image.png&tid=077d6802e45c46379d50521c82d6061f637653357339150573)

Main Thread

 	[Waiting on lock owned by Thread 17980, double-click or press enter to switch to thread]	
 	FSharp.Editor.dll! <StartupCode$FSharp-Editor>.$SingleFileWorkspaceMap.-ctor@219-18.Invoke(Microsoft.CodeAnalysis.DocumentEventArgs args) Line 225	F#
>	FSharp.Core.dll!Microsoft.FSharp.Core.CompilerServices.RuntimeHelpers.h@346<Microsoft.CodeAnalysis.DocumentEventArgs>. Invoke(object _arg1, Microsoft.CodeAnalysis.DocumentEventArgs args) Line 346	F#
 	Microsoft.CodeAnalysis.Workspaces.dll! Roslyn.Utilities.EventMap.Registry<System.__Canon>. Invoke(System.Action<System.__Canon> invoker)	Unknown
 	Microsoft.CodeAnalysis.Workspaces.dll! Roslyn.Utilities.EventMap.EventHandlerSet<System.EventHandler<Microsoft.CodeAnalysis.DocumentEventArgs>>. RaiseEvent(System.Action<System.EventHandler<Microsoft.CodeAnalysis.DocumentEventArgs>> invoker)	Unknown
 	Microsoft.CodeAnalysis.Workspaces.dll! Roslyn.Utilities.TaskExtensions.SafeContinueWith.__continuationFunction|0(System.Threading.Tasks.Task antecedent)	Unknown
 	Microsoft.CodeAnalysis.Workspaces.dll! Roslyn.Utilities.TaskExtensions.SafeContinueWith.__outerFunction|0(System.Threading.Tasks.Task t)	Unknown
 	mscorlib.dll! System.Threading.Tasks.ContinuationResultTaskFromTask<bool>. InnerInvoke()	Unknown
 	mscorlib.dll! System.Threading.Tasks.Task.Execute()	Unknown
 	mscorlib.dll! System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state, bool preserveSyncCtx)	Unknown
 	mscorlib.dll! System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state, bool preserveSyncCtx)	Unknown
 	mscorlib.dll! System.Threading.Tasks.Task.ExecuteWithThreadLocal(ref System.Threading.Tasks.Task currentTaskSlot)	Unknown
 	mscorlib.dll! System.Threading.Tasks.Task.ExecuteEntry(bool bPreventDoubleExecution)	Unknown
 	Microsoft.CodeAnalysis.EditorFeatures.dll! Microsoft.CodeAnalysis.Editor.Shared.Utilities.ThreadingContextTaskSchedulerProvider.JoinableTaskFactoryTaskScheduler.QueueTask.AnonymousMethod__0()	Unknown
 	[Resuming Async Method]	
 	mscorlib.dll! System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state, bool preserveSyncCtx)	Unknown
 	mscorlib.dll! System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state, bool preserveSyncCtx)	Unknown
 	mscorlib.dll!System.Runtime.CompilerServices.AsyncMethodBuilderCore.MoveNextRunner.Run()	Unknown
 	Microsoft.VisualStudio.Threading.dll! Microsoft.VisualStudio.Threading.JoinableTaskFactory.SingleExecuteProtector.TryExecute()	Unknown
 	WindowsBase.dll! System.Windows.Threading.ExceptionWrapper.InternalRealCall(System.Delegate callback, object args, int numArgs)	Unknown
 	WindowsBase.dll! System.Windows.Threading.ExceptionWrapper.TryCatchWhen(object source, System.Delegate callback, object args, int numArgs, System.Delegate catchHandler)	Unknown
 	WindowsBase.dll! System.Windows.Threading.DispatcherOperation.InvokeImpl()	Unknown
 	WindowsBase.dll! System.Windows.Threading.DispatcherOperation.Invoke()	Unknown
 	WindowsBase.dll! System.Windows.Threading.Dispatcher.ProcessQueue()	Unknown
 	WindowsBase.dll! System.Windows.Threading.Dispatcher.WndProcHook(System.IntPtr hwnd, int msg, System.IntPtr wParam, System.IntPtr lParam, ref bool handled)	Unknown
 	WindowsBase.dll!MS. Win32.HwndWrapper.WndProc(System.IntPtr hwnd, int msg, System.IntPtr wParam, System.IntPtr lParam, ref bool handled)	Unknown
 	WindowsBase.dll!MS. Win32.HwndSubclass.DispatcherCallbackOperation(object o)	Unknown
 	WindowsBase.dll! System.Windows.Threading.ExceptionWrapper.InternalRealCall(System.Delegate callback, object args, int numArgs)	Unknown
 	WindowsBase.dll! System.Windows.Threading.ExceptionWrapper.TryCatchWhen(object source, System.Delegate callback, object args, int numArgs, System.Delegate catchHandler)	Unknown
 	WindowsBase.dll! System.Windows.Threading.Dispatcher.LegacyInvokeImpl(System.Windows.Threading.DispatcherPriority priority, System.TimeSpan timeout, System.Delegate method, object args, int numArgs)	Unknown
 	WindowsBase.dll!MS. Win32.HwndSubclass.SubclassWndProc(System.IntPtr hwnd, int msg, System.IntPtr wParam, System.IntPtr lParam)	Unknown
 	[Async Call Stack]	
 	[Async] Microsoft.VisualStudio.Threading.dll! Microsoft.VisualStudio.Threading.JoinableTask.SetWrappedTask.AnonymousMethod__87_0(System.Threading.Tasks.Task t, object s)	Unknown

Thread 17980

 	mscorlib.dll! System.Threading.ManualResetEventSlim.Wait(int millisecondsTimeout, System.Threading.CancellationToken cancellationToken)	Unknown
 	mscorlib.dll! System.Threading.Tasks.Task.SpinThenBlockingWait(int millisecondsTimeout, System.Threading.CancellationToken cancellationToken)	Unknown
 	mscorlib.dll! System.Threading.Tasks.Task.InternalWait(int millisecondsTimeout, System.Threading.CancellationToken cancellationToken)	Unknown
 	mscorlib.dll! System.Threading.Tasks.Task.Wait(int millisecondsTimeout, System.Threading.CancellationToken cancellationToken)	Unknown
 	mscorlib.dll! System.Threading.Tasks.Task.Wait(System.TimeSpan timeout)	Unknown
 	[Waiting on Async Operation, double-click or press enter to view Async Call Stacks]	
 	Microsoft.VisualStudio.Threading.dll! Microsoft.VisualStudio.Threading.JoinableTaskFactory.WaitSynchronouslyCore(System.Threading.Tasks.Task task)	Unknown
 	Microsoft.VisualStudio.Threading.dll! Microsoft.VisualStudio.Threading.JoinableTaskFactory.WaitSynchronously(System.Threading.Tasks.Task task)	Unknown
 	Microsoft.VisualStudio.Threading.dll!Microsoft.VisualStudio.Threading.JoinableTask.CompleteOnCurrentThread()	Unknown
 	Microsoft.VisualStudio.Threading.dll! Microsoft.VisualStudio.Threading.JoinableTask<Microsoft.VisualStudio.LanguageServices.ProjectSystem.IWorkspaceProjectContext>. CompleteOnCurrentThread()	Unknown
 	Microsoft.VisualStudio.LanguageServices.Implementation.dll! Microsoft.VisualStudio.LanguageServices.Implementation.ProjectSystem.CPS.CPSProjectFactory.Microsoft.VisualStudio.LanguageServices.ProjectSystem.IWorkspaceProjectContextFactory.CreateProjectContext(string languageName, string projectUniqueName, string projectFilePath, System.Guid projectGuid, object hierarchy, string binOutputPath)	Unknown
>	FSharp.Editor.dll! Microsoft.VisualStudio.FSharp.Editor.FSharpWorkspaceProjectContextFactory.Microsoft.VisualStudio.FSharp.Editor.IFSharpWorkspaceProjectContextFactory.CreateProjectContext(string filePath) Line 136	F#
 	FSharp.Editor.dll! <StartupCode$FSharp-Editor>.$SingleFileWorkspaceMap.action@1(Microsoft.VisualStudio.FSharp.Editor.FSharpMiscellaneousFileService this, string[] refSourceFiles, Microsoft.FSharp.Core.FSharpRef<Microsoft.VisualStudio.FSharp.Editor.IFSharpWorkspaceProjectContext> projectContext, Microsoft.FSharp.Core.Unit unitVar0) Line 199	F#
 	FSharp.Editor.dll! <StartupCode$FSharp-Editor>.$SingleFileWorkspaceMap.-ctor@178-13.Invoke(FSharp.Compiler.CodeAnalysis.FSharpProjectOptions scriptProjectOptions) Line 195	F#
 	FSharp.Editor.dll! <StartupCode$FSharp-Editor>.$FSharpProjectOptionsManager[Redacted]@[Redacted]System.Tuple<FSharp.Compiler.CodeAnalysis.FSharpProjectOptions, Microsoft.FSharp.Collections.FSharpList<FSharp.Compiler.Diagnostics.FSharpDiagnostic>> _arg3) Line 191	F#
 	FSharp.Core.dll! <StartupCode$FSharp-Core>.$Async[Redacted]@[Redacted]object _arg3, bool timeOut) Line 1667	F#
 	mscorlib.dll! System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state, bool preserveSyncCtx)	Unknown
 	mscorlib.dll! System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state, bool preserveSyncCtx)	Unknown
 	mscorlib.dll! System.Threading._ThreadPoolWaitOrTimerCallback.PerformWaitOrTimerCallback(object state, bool timedOut)	Unknown

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Original Comments

Feedback Bot on 8/23/2021, 08:13 PM:

We have directed your feedback to the appropriate engineering team for further evaluation. The team will review the feedback and notify you about the next steps.

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Original Solutions

(no solutions)

[TIHan]

This one is a bit weird, but we do have a lock in the SingleFileWorkspaceMap - that's probably what is causing it.

[dsyme]

Thanks for looking into this. I can help you review the code if you like

[TIHan]

Fix has been merged.