Several crashes of Visual Studio 2015 when editing cs file

[schuettecarsten]

Version Used:

Visual Studio Enterprise 2015 v14.0.25123.00 Update 2
Roslyn Insider v1.3.0.60510 from nightly feed

Steps to Reproduce:

Several crashes of Visual Studio 2015 Update 2 when editing file.

Expected Behavior:

Visual Studio 2015 should not crash

Actual Behavior:

Anwendung: devenv.exe
Frameworkversion: v4.0.30319
Beschreibung: Die Anwendung forderte die Beendigung des Prozesses durch System.Environment.FailFast(Zeichenfolgenmeldung) an.
Meldung: System.AggregateException: One or more errors occurred. ---> System.ArgumentException: SyntaxTree 'namespace App.Uap10.Services.DataSources
{
    using System;
    using System.Diagnostics;
    using System.Threading.Tasks;
    using App.Uap10.Services.DataSources.Base;
    using App.Commons.Annotations;
    using App.Commons.Logging;
    using App.Commons.Template10;

    public class BackgroundLoadingObservableCollection<T> : BaseDataSourceObservableCollection<T>
    {
        private static readonly ILogger logger = LogManager.GetLogger<BackgroundLoadingObservableCollection<T>>();
        private readonly TaskCompletionSource<int> firstPageCompletionSource;
        private readonly TaskCompletionSource<int> loadingTaskCompletionSource;

        /// <summary>
        /// Initializes a new instance of the <see cref="BackgroundLoadingObservableCollection{T}"/> class.
        /// </summary>
        public BackgroundLoadingObservableCollection()
        {
            this.firstPageCompletionSource = new TaskCompletionSource<int>();
            this.loadingTaskCompletionSource = new TaskCompletionSource<int>();
        }

        /// <summary>
        /// Initializes a new instance of the <see cref="BackgroundLoadingObservableCollection{T}"/> class.
        /// </summary>
        public BackgroundLoadingObservableCollection(BaseIncrementalLoadingDataSource<T> dataSource)
            : this()
        {
            // Do not pass DataSource to base constructor to make sure that loadingTaskCompletionSource is initialized!
            this.DataSource = dataSource;
        }

        /// <summary>
        /// Gets the first page task.
        /// </summary>
        [PublicAPI]
        public Task<int> FirstPageTask
        {
            [DebuggerStepThrough]
            get { return this.firstPageCompletionSource.Task; }
        }

        /// <summary>
        /// Gets the loading task.
        /// </summary>
        [PublicAPI]
        public Task<int> LoadingTask
        {
            [DebuggerStepThrough]
            get { return this.loadingTaskCompletionSource.Task; }
        }

        /// <summary>
        /// Waits for loading completed.
        /// </summary>
        [PublicAPI]
        public async Task<int> WaitForLoadingCompleted()
        {
            return await this.loadingTaskCompletionSource.Task.ConfigureAwait(false);
        }

        #region Overrides of BaseDataSourceObservableCollection<T>

        /// <summary>
        /// Called when the data source was updated.
        /// </summary>
        protected override void UpdateDataSource()
        {
            base.UpdateDataSource();

            Task.Run(async delegate
            {
                int count = 0;
                bool isFirstPage = true;
                try
                {
                    while (this.DataSource.HasMoreItems)
                    {
                        count = count + await this.DataSource.DoLoadMoreItemsAsync(this.Items).ConfigureAwait(false);
                        if ((count > 0) && isFirstPage)
                        {
                            isFirstPage = false;
                            await this.NotifyChangedAsync(this.DataSource).ConfigureAwait(f);
                            this.firstPageCompletionSource.TrySetResult(count);
                        }
                        await Task.Delay(1);
                    }
                    this.loadingTaskCompletionSource.TrySetResult(count);
                }
                catch (Exception ex)
                {
                    if (!ex.IsOperationCanceledException())
                    {
                        logger.WarnException(ex.Message, ex);
                        this.loadingTaskCompletionSource.TrySetException(ex);
                        if (isFirstPage)
                        {
                            this.NotifyChanged(this.DataSource);
                            this.firstPageCompletionSource.TrySetException(ex);
                        }
                    }
                    else
                    {
                        this.loadingTaskCompletionSource.TrySetResult(count);
                        if (isFirstPage)
                        {
                            this.NotifyChanged(this.DataSource);
                            this.firstPageCompletionSource.TrySetResult(count);
                        }
                    }
                }
            });
        }

        #endregion
    }
}' not found to remove
Parameter name: syntaxTree
   at Microsoft.CodeAnalysis.CSharp.CSharpCompilation.GetSemanticModel(SyntaxTree syntaxTree, Boolean ignoreAccessibility)
   at Microsoft.CodeAnalysis.CSharp.CSharpCompilation.CommonGetSemanticModel(SyntaxTree syntaxTree, Boolean ignoreAccessibility)
   at Microsoft.CodeAnalysis.SymbolId.GetInteriorSymbols(ISymbol containingSymbol, List`1 symbols)
   at Microsoft.CodeAnalysis.SymbolId.GetInteriorSymbolOccurrence(ISymbol symbol)
   at Microsoft.CodeAnalysis.SymbolId.Generator.VisitLocal(ILocalSymbol symbol)
   at Microsoft.CodeAnalysis.SymbolId.Generator.Visit(ISymbol symbol)
   at Microsoft.CodeAnalysis.SymbolId.CreateId(ISymbol symbol)
   at Microsoft.CodeAnalysis.Completion.Providers.SymbolCompletionItem.EncodeSymbols(IReadOnlyList`1 symbols)
   at Microsoft.CodeAnalysis.Completion.Providers.SymbolCompletionItem.Create(String displayText, TextSpan span, IReadOnlyList`1 symbols, Int32 contextPosition, Int32 descriptionPosition, String sortText, String insertionText, Nullable`1 glyph, String filterText, Boolean preselect, SupportedPlatformData supportedPlatforms, Boolean isArgumentName, ImmutableDictionary`2 properties, ImmutableArray`1 tags, CompletionItemRules rules)
   at Microsoft.CodeAnalysis.Completion.Providers.AbstractSymbolCompletionProvider.CreateItem(String displayText, String insertionText, Int32 position, List`1 symbols, AbstractSyntaxContext context, TextSpan span, Boolean preselect, SupportedPlatformData supportedPlatformData)
   at Microsoft.CodeAnalysis.Completion.Providers.AbstractSymbolCompletionProvider.CreateItem(String displayText, String insertionText, Int32 position, List`1 symbols, AbstractSyntaxContext context, TextSpan span, Dictionary`2 invalidProjectMap, List`1 totalProjects, Boolean preselect)
   at Microsoft.CodeAnalysis.Completion.Providers.AbstractSymbolCompletionProvider.<>c__DisplayClass6_0.<CreateItems>b__3(IGrouping`2 g)
   at System.Linq.Enumerable.WhereSelectEnumerableIterator`2.MoveNext()
   at System.Collections.Generic.List`1..ctor(IEnumerable`1 collection)
   at System.Linq.Enumerable.ToList[TSource](IEnumerable`1 source)
   at Microsoft.CodeAnalysis.Completion.Providers.AbstractSymbolCompletionProvider.CreateItems(Int32 position, IEnumerable`1 symbols, TextSpan span, AbstractSyntaxContext context, Dictionary`2 invalidProjectMap, List`1 totalProjects, Boolean preselect)
   at Microsoft.CodeAnalysis.Completion.Providers.AbstractSymbolCompletionProvider.<GetItemsWorkerAsync>d__15.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.CodeAnalysis.Completion.Providers.AbstractSymbolCompletionProvider.<ProvideCompletionsAsync>d__14.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.CodeAnalysis.Completion.CompletionServiceWithProviders.<GetProviderCompletionsAsync>d__24.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd(Task task)
   at Microsoft.CodeAnalysis.Completion.CompletionServiceWithProviders.<GetCompletionsAsync>d__18.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.CodeAnalysis.Editor.Implementation.IntelliSense.Completion.Controller.Session.ModelComputer.<GetCompletionListAsync>d__14.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.CodeAnalysis.Editor.Implementation.IntelliSense.Completion.Controller.Session.ModelComputer.<DoInBackgroundAsync>d__13.MoveNext()
   --- End of inner exception stack trace ---
---> (Inner Exception #0) System.ArgumentException: SyntaxTree 'namespace App.Uap10.Services.DataSources
{
    using System;
    using System.Diagnostics;
    using System.Threading.Tasks;
    using App.Uap10.Services.DataSources.Base;
    using App.Commons.Annotations;
    using App.Commons.Logging;
    using App.Commons.Template10;

    public class BackgroundLoadingObservableCollection<T> : BaseDataSourceObservableCollection<T>
    {
        private static readonly ILogger logger = LogManager.GetLogger<BackgroundLoadingObservableCollection<T>>();
        private readonly TaskCompletionSource<int> firstPageCompletionSource;
        private readonly TaskCompletionSource<int> loadingTaskCompletionSource;

        /// <summary>
        /// Initializes a new instance of the <see cref="BackgroundLoadingObservableCollection{T}"/> class.
        /// </summary>
        public BackgroundLoadingObservableCollection()
        {
            this.firstPageCompletionSource = new TaskCompletionSource<int>();
            this.loadingTaskCompletionSource = new TaskCompletionSource<int>();
        }

        /// <summary>
        /// Initializes a new instance of the <see cref="BackgroundLoadingObservableCollection{T}"/> class.
        /// </summary>
        public BackgroundLoadingObservableCollection(BaseIncrementalLoadingDataSource<T> dataSource)
            : this()
        {
            // Do not pass DataSource to base constructor to make sure that loadingTaskCompletionSource is initialized!
            this.DataSource = dataSource;
        }

        /// <summary>
        /// Gets the first page task.
        /// </summary>
        [PublicAPI]
        public Task<int> FirstPageTask
        {
            [DebuggerStepThrough]
            get { return this.firstPageCompletionSource.Task; }
        }

        /// <summary>
        /// Gets the loading task.
        /// </summary>
        [PublicAPI]
        public Task<int> LoadingTask
        {
            [DebuggerStepThrough]
            get { return this.loadingTaskCompletionSource.Task; }
        }

        /// <summary>
        /// Waits for loading completed.
        /// </summary>
        [PublicAPI]
        public async Task<int> WaitForLoadingCompleted()
        {
            return await this.loadingTaskCompletionSource.Task.ConfigureAwait(false);
        }

        #region Overrides of BaseDataSourceObservableCollection<T>

        /// <summary>
        /// Called when the data source was updated.
        /// </summary>
        protected override void UpdateDataSource()
        {
            base.UpdateDataSource();

            Task.Run(async delegate
            {
                int count = 0;
                bool isFirstPage = true;
                try
                {
                    while (this.DataSource.HasMoreItems)
                    {
                        count = count + await this.DataSource.DoLoadMoreItemsAsync(this.Items).ConfigureAwait(false);
                        if ((count > 0) && isFirstPage)
                        {
                            isFirstPage = false;
                            await this.NotifyChangedAsync(this.DataSource).ConfigureAwait(f);
                            this.firstPageCompletionSource.TrySetResult(count);
                        }
                        await Task.Delay(1);
                    }
                    this.loadingTaskCompletionSource.TrySetResult(count);
                }
                catch (Exception ex)
                {
                    if (!ex.IsOperationCanceledException())
                    {
                        logger.WarnException(ex.Message, ex);
                        this.loadingTaskCompletionSource.TrySetException(ex);
                        if (isFirstPage)
                        {
                            this.NotifyChanged(this.DataSource);
                            this.firstPageCompletionSource.TrySetException(ex);
                        }
                    }
                    else
                    {
                        this.loadingTaskCompletionSource.TrySetResult(count);
                        if (isFirstPage)
                        {
                            this.NotifyChanged(this.DataSource);
                            this.firstPageCompletionSource.TrySetResult(count);
                        }
                    }
                }
            });
        }

        #endregion
    }
}' not found to remove
Parameter name: syntaxTree
   at Microsoft.CodeAnalysis.CSharp.CSharpCompilation.GetSemanticModel(SyntaxTree syntaxTree, Boolean ignoreAccessibility)
   at Microsoft.CodeAnalysis.CSharp.CSharpCompilation.CommonGetSemanticModel(SyntaxTree syntaxTree, Boolean ignoreAccessibility)
   at Microsoft.CodeAnalysis.SymbolId.GetInteriorSymbols(ISymbol containingSymbol, List`1 symbols)
   at Microsoft.CodeAnalysis.SymbolId.GetInteriorSymbolOccurrence(ISymbol symbol)
   at Microsoft.CodeAnalysis.SymbolId.Generator.VisitLocal(ILocalSymbol symbol)
   at Microsoft.CodeAnalysis.SymbolId.Generator.Visit(ISymbol symbol)
   at Microsoft.CodeAnalysis.SymbolId.CreateId(ISymbol symbol)
   at Microsoft.CodeAnalysis.Completion.Providers.SymbolCompletionItem.EncodeSymbols(IReadOnlyList`1 symbols)
   at Microsoft.CodeAnalysis.Completion.Providers.SymbolCompletionItem.Create(String displayText, TextSpan span, IReadOnlyList`1 symbols, Int32 contextPosition, Int32 descriptionPosition, String sortText, String insertionText, Nullable`1 glyph, String filterText, Boolean preselect, SupportedPlatformData supportedPlatforms, Boolean isArgumentName, ImmutableDictionary`2 properties, ImmutableArray`1 tags, CompletionItemRules rules)
   at Microsoft.CodeAnalysis.Completion.Providers.AbstractSymbolCompletionProvider.CreateItem(String displayText, String insertionText, Int32 position, List`1 symbols, AbstractSyntaxContext context, TextSpan span, Boolean preselect, SupportedPlatformData supportedPlatformData)
   at Microsoft.CodeAnalysis.Completion.Providers.AbstractSymbolCompletionProvider.CreateItem(String displayText, String insertionText, Int32 position, List`1 symbols, AbstractSyntaxContext context, TextSpan span, Dictionary`2 invalidProjectMap, List`1 totalProjects, Boolean preselect)
   at Microsoft.CodeAnalysis.Completion.Providers.AbstractSymbolCompletionProvider.<>c__DisplayClass6_0.<CreateItems>b__3(IGrouping`2 g)
   at System.Linq.Enumerable.WhereSelectEnumerableIterator`2.MoveNext()
   at System.Collections.Generic.List`1..ctor(IEnumerable`1 collection)
   at System.Linq.Enumerable.ToList[TSource](IEnumerable`1 source)
   at Microsoft.CodeAnalysis.Completion.Providers.AbstractSymbolCompletionProvider.CreateItems(Int32 position, IEnumerable`1 symbols, TextSpan span, AbstractSyntaxContext context, Dictionary`2 invalidProjectMap, List`1 totalProjects, Boolean preselect)
   at Microsoft.CodeAnalysis.Completion.Providers.AbstractSymbolCompletionProvider.<GetItemsWorkerAsync>d__15.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.CodeAnalysis.Completion.Providers.AbstractSymbolCompletionProvider.<ProvideCompletionsAsync>d__14.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.CodeAnalysis.Completion.CompletionServiceWithProviders.<GetProviderCompletionsAsync>d__24.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd(Task task)
   at Microsoft.CodeAnalysis.Completion.CompletionServiceWithProviders.<GetCompletionsAsync>d__18.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.CodeAnalysis.Editor.Implementation.IntelliSense.Completion.Controller.Session.ModelComputer.<GetCompletionListAsync>d__14.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.CodeAnalysis.Editor.Implementation.IntelliSense.Completion.Controller.Session.ModelComputer.<DoInBackgroundAsync>d__13.MoveNext()<---

Stapel:
   bei System.Environment.FailFast(System.String, System.Exception)
   bei Microsoft.CodeAnalysis.FailFast.OnFatalException(System.Exception)
   bei Microsoft.CodeAnalysis.ErrorReporting.FatalError.Report(System.Exception, System.Action`1<System.Exception>)
   bei Microsoft.CodeAnalysis.ErrorReporting.FatalError.Report(System.Exception)
   bei Roslyn.Utilities.TaskExtensions.ReportFatalErrorWorker(System.Threading.Tasks.Task, System.Object)
   bei System.Threading.Tasks.ContinuationTaskFromTask.InnerInvoke()
   bei System.Threading.Tasks.Task.Execute()
   bei System.Threading.Tasks.Task.ExecutionContextCallback(System.Object)
   bei System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean)
   bei System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean)
   bei System.Threading.Tasks.Task.ExecuteWithThreadLocal(System.Threading.Tasks.Task ByRef)
   bei System.Threading.Tasks.Task.ExecuteEntry(Boolean)
   bei System.Threading.Tasks.ThreadPoolTaskScheduler.TryExecuteTaskInline(System.Threading.Tasks.Task, Boolean)
   bei System.Threading.Tasks.TaskScheduler.TryRunInline(System.Threading.Tasks.Task, Boolean)
   bei System.Threading.Tasks.TaskContinuation.InlineIfPossibleOrElseQueue(System.Threading.Tasks.Task, Boolean)
   bei System.Threading.Tasks.StandardTaskContinuation.Run(System.Threading.Tasks.Task, Boolean)
   bei System.Threading.Tasks.Task.ContinueWithCore(System.Threading.Tasks.Task, System.Threading.Tasks.TaskScheduler, System.Threading.CancellationToken, System.Threading.Tasks.TaskContinuationOptions)
   bei System.Threading.Tasks.Task.ContinueWith(System.Action`2<System.Threading.Tasks.Task,System.Object>, System.Object, System.Threading.Tasks.TaskScheduler, System.Threading.CancellationToken, System.Threading.Tasks.TaskContinuationOptions, System.Threading.StackCrawlMark ByRef)
   bei System.Threading.Tasks.Task.ContinueWith(System.Action`2<System.Threading.Tasks.Task,System.Object>, System.Object, System.Threading.CancellationToken, System.Threading.Tasks.TaskContinuationOptions, System.Threading.Tasks.TaskScheduler)
   bei Roslyn.Utilities.TaskExtensions.ReportFatalError(System.Threading.Tasks.Task, System.Object)
   bei System.Threading.Tasks.ContinuationTaskFromResultTask`1[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].InnerInvoke()
   bei System.Threading.Tasks.Task.Execute()
   bei System.Threading.Tasks.Task.ExecutionContextCallback(System.Object)
   bei System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean)
   bei System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean)
   bei System.Threading.Tasks.Task.ExecuteWithThreadLocal(System.Threading.Tasks.Task ByRef)
   bei System.Threading.Tasks.Task.ExecuteEntry(Boolean)
   bei System.Threading.Tasks.ThreadPoolTaskScheduler.TryExecuteTaskInline(System.Threading.Tasks.Task, Boolean)
   bei System.Threading.Tasks.TaskScheduler.TryRunInline(System.Threading.Tasks.Task, Boolean)
   bei System.Threading.Tasks.TaskContinuation.InlineIfPossibleOrElseQueue(System.Threading.Tasks.Task, Boolean)
   bei System.Threading.Tasks.StandardTaskContinuation.Run(System.Threading.Tasks.Task, Boolean)
   bei System.Threading.Tasks.Task.FinishContinuations()
   bei System.Threading.Tasks.Task.FinishStageThree()
   bei System.Threading.Tasks.Task.FinishStageTwo()
   bei System.Threading.Tasks.Task.Finish(Boolean)
   bei System.Threading.Tasks.Task`1[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].TrySetException(System.Object)
   bei System.Threading.Tasks.UnwrapPromise`1[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].TrySetFromTask(System.Threading.Tasks.Task, Boolean)
   bei System.Threading.Tasks.UnwrapPromise`1[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].ProcessInnerTask(System.Threading.Tasks.Task)
   bei System.Threading.Tasks.UnwrapPromise`1[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].ProcessCompletedOuterTask(System.Threading.Tasks.Task)
   bei System.Threading.Tasks.UnwrapPromise`1[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].Invoke(System.Threading.Tasks.Task)
   bei System.Threading.Tasks.Task.FinishContinuations()
   bei System.Threading.Tasks.Task.FinishStageThree()
   bei System.Threading.Tasks.Task.FinishStageTwo()
   bei System.Threading.Tasks.Task.Finish(Boolean)
   bei System.Threading.Tasks.Task.ExecuteWithThreadLocal(System.Threading.Tasks.Task ByRef)
   bei System.Threading.Tasks.Task.ExecuteEntry(Boolean)
   bei System.Threading.Tasks.TaskScheduler.TryExecuteTask(System.Threading.Tasks.Task)
   bei Microsoft.CodeAnalysis.Editor.Implementation.IntelliSense.Completion.PrioritizedTaskScheduler.ThreadStart()
   bei System.Threading.ThreadHelper.ThreadStart_Context(System.Object)
   bei System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean)
   bei System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean)
   bei System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object)
   bei System.Threading.ThreadHelper.ThreadStart()

[jmarolf]

Thanks for the bug report! Looks related to #11193

[Pilchie]

I believe this is a dupe of #11193, can you confirm?

[rchande]

Yes, that's the same stack.

[rchande]

@schuettecarsten: This is fixed in recent builds of Master--should be resolved if you install a new VSIX.