RSRP-290600: Object reference not set to an instance of an object.

  at Microsoft.VisualStudio.Editor.Implementation.VsTextBufferAdapter.EnumMarkers(Int32 iPos, Int32 iLen, Int32 iMarkerType, UInt32 dwFlags, IVsEnumStreamMarkers& ppEnum)
     at JetBrains.VsIntegration.Interop.Shim.TextManager.IVsTextBuffer.EnumMarkersCore(Int32 iPos, Int32 iLen, MARKERTYPE iMarkerType, ENUMMARKERFLAGS dwFlags, IVsEnumStreamMarkers& en, Int32& enumitems) in c:\BuildAgent\work\1939c01d7b25093a\Platform\src\VisualStudio\Core\src\Interop\Shim\TextManager\IVsTextBuffer.cs:line 633
     at JetBrains.VsIntegration.Interop.Shim.TextManager.IVsTextBuffer.EnumMarkers_Count(Int32 iPos, Int32 iLen, MARKERTYPE iMarkerType, ENUMMARKERFLAGS dwFlags) in c:\BuildAgent\work\1939c01d7b25093a\Platform\src\VisualStudio\Core\src\Interop\Shim\TextManager\IVsTextBuffer.cs:line 261
     at JetBrains.VsIntegration.DocumentModel.VsDocumentOperationsHandlerWhidbey.JetBrains.VsIntegration.Whidbey.DocumentModel.IDocumentOperationsHandlerWhidbey.ContainsReadOnlyRegions() in c:\BuildAgent\work\1939c01d7b25093a\Platform\src\VisualStudio\Core\src\DocumentModel\Whidbey\VsDocumentOperationsHandlerWhidbey.cs:line 454
     at JetBrains.VsIntegration.DocumentModel.Whidbey.VsDocumentWhidbey.ContainsReadOnlyRegions() in c:\BuildAgent\work\1939c01d7b25093a\Platform\src\VisualStudio\Core\src\DocumentModel\Whidbey\VsDocumentWhidbey.cs:line 199
     at JetBrains.VsIntegration.DevTen.ProjectModel.VsEnsureWritableHandlerDevTen.QueryIsWritable(IProjectFile profile) in c:\BuildAgent\work\1939c01d7b25093a\Platform\src\VisualStudio\v10.v11\Src\ProjectModel\VsEnsureWritableHandlerDevTen.cs:line 50
     at JetBrains.ProjectModel.Model2.Transaction.EnsureWritableHandler.IsWritable(IProjectFile projectFile) in c:\BuildAgent\work\1939c01d7b25093a\Platform\src\Projects\src\model2\Transaction\EnsureWritableHandler.cs:line 250
     at JetBrains.ProjectModel.Model2.Transaction.EnsureWritableHandler.<CreateCookie>b__4(IProjectFile projectFile) in c:\BuildAgent\work\1939c01d7b25093a\Platform\src\Projects\src\model2\Transaction\EnsureWritableHandler.cs:line 58
     at System.Linq.Enumerable.WhereListIterator`1.MoveNext()
     at System.Collections.Generic.List`1.InsertRange(Int32 index, IEnumerable`1 collection)
     at System.Collections.Generic.List`1.AddRange(IEnumerable`1 collection)
     at JetBrains.ProjectModel.Model2.Transaction.EnsureWritableHandler.CreateCookie(EnsureWritableCollection collection, ICollection`1 doNotOpenOnBefore) in c:\BuildAgent\work\1939c01d7b25093a\Platform\src\Projects\src\model2\Transaction\EnsureWritableHandler.cs:line 58
     at JetBrains.ProjectModel.Model2.Transaction.EnsureWritableCollection.CreateCookie(ICollection`1 doNotOpenOnBefore) in c:\BuildAgent\work\1939c01d7b25093a\Platform\src\Projects\src\model2\Transaction\EnsureWritableCollection.cs:line 16
     at JetBrains.DocumentManagers.Transactions.SolutionProjectDocumentTransaction.CreateEnsureWritableCoockie(IList`1& affectedDocuments) in c:\BuildAgent\work\1939c01d7b25093a\Platform\src\ProjectDocuments\src\Transactions\SolutionProjectDocumentTransaction.cs:line 86
     at JetBrains.DocumentModel.Transactions.DocumentTransaction.Commit(IProgressIndicator pi) in c:\BuildAgent\work\1939c01d7b25093a\Platform\src\Documents\src\Transactions\DocumentTransaction.cs:line 133

  at JetBrains.DocumentModel.Transactions.DocumentTransaction.Commit(IProgressIndicator pi) in c:\BuildAgent\work\1939c01d7b25093a\Platform\src\Documents\src\Transactions\DocumentTransaction.cs:line 200
     at JetBrains.DocumentModel.Transactions.DocumentTransactionManager.CommitTransaction(IUndoRedoHandler undoRedoHandler, IProgressIndicator pi) in c:\BuildAgent\work\1939c01d7b25093a\Platform\src\Documents\src\Transactions\DocumentTransactionManager.cs:line 71
     at JetBrains.DocumentModel.Transactions.DocumentTransactionCookie.Commit(IProgressIndicator pi) in c:\BuildAgent\work\1939c01d7b25093a\Platform\src\Documents\src\Transactions\DocumentTransactionCookie.cs:line 72
     at JetBrains.ProjectModel.ProjectModelTransactionFactory.ProjectModelTransactionCookie.Commit(IProgressIndicator pi) in c:\BuildAgent\work\1939c01d7b25093a\Platform\src\ProjectDocuments\src\Transactions\ProjectModelTransactionFactory.cs:line 47
     at JetBrains.ReSharper.Refactorings.WorkflowNew.WorkflowExecuter.<>c__DisplayClass18.<>c__DisplayClass1a.<InitPage>b__d(IProjectModelTransactionCookie c) in c:\BuildAgent\work\1939c01d7b25093a\Psi.Features\src\Refactorings\_Core\src\WorkflowNew\WorkflowExecuter.cs:line 319
     at JetBrains.Util.Special.GeneralUtil.IfNotNull[TInput,TResult](TInput object, Func`2 functor, TResult default) in c:\BuildAgent\work\1939c01d7b25093a\Platform\src\Util\src\GeneralUtil.cs:line 58
     at JetBrains.ReSharper.Refactorings.WorkflowNew.WorkflowExecuter.<>c__DisplayClass18.<InitPage>b__c(IProgressIndicator pi) in c:\BuildAgent\work\1939c01d7b25093a\Psi.Features\src\Refactorings\_Core\src\WorkflowNew\WorkflowExecuter.cs:line 319
     at JetBrains.ReSharper.Refactorings.WorkflowNew.FunctionWrapper`1.ExecuteAction(IProgressIndicator pi) in c:\BuildAgent\work\1939c01d7b25093a\Psi.Features\src\Refactorings\_Core\src\WorkflowNew\FunctionWrapper.cs:line 33
     at JetBrains.UI.Application.Progress.UITaskExecutorRun.RunStartTaskCallTaskAction(IProperty`1 isDone, ProgressIndicator progressIndicator, TaskThreadAffinity taskThreadAffinity, Action`1 FTask, JetDispatcher dispatcherPrimary) in c:\BuildAgent\work\1939c01d7b25093a\Platform\src\UI\src\Progress\UITaskExecutorRun.cs:line 315
     at JetBrains.UI.Application.Progress.UITaskExecutorRun.<>c__DisplayClass3.<RunCore>b__0(Lifetime lifetime) in c:\BuildAgent\work\1939c01d7b25093a\Platform\src\UI\src\Progress\UITaskExecutorRun.cs:line 139
     at JetBrains.DataFlow.Lifetimes.Using[TRetVal](Func`2 F) in c:\BuildAgent\work\1939c01d7b25093a\Platform\src\Util\src\DataFlow\Lifetime\Lifetimes.cs:line 41
     at JetBrains.UI.Application.Progress.UITaskExecutorRun.RunCore(TaskThreadAffinity taskThreadAffinity, Action`1 FTask, Func`3 FAttachUi, ProgressIndicator progressIndicator, IWin32Window parentWindow, IThreading threading, Boolean enforceModalityState) in c:\BuildAgent\work\1939c01d7b25093a\Platform\src\UI\src\Progress\UITaskExecutorRun.cs:line 84
     at JetBrains.UI.Application.Progress.UITaskExecutorRun.Run(TaskThreadAffinity taskThreadAffinity, Action`1 task, Func`3 FAttachUi, ProgressIndicator indicator, IWin32Window parentWindow, IThreading threading, Boolean enforceModalityState) in c:\BuildAgent\work\1939c01d7b25093a\Platform\src\UI\src\Progress\UITaskExecutorRun.cs:line 45
     at JetBrains.ReSharper.Refactorings.Workflow.RefactoringsTaskExecutor.JetBrains.Application.Progress.ITaskExecutor.ExecuteTask(String name, TaskCancelable cancelable, Action`1 task) in c:\BuildAgent\work\1939c01d7b25093a\Psi.Features\src\Refactorings\_Core\src\Workflow\RefactoringsTaskExecutor.cs:line 54
     at JetBrains.ReSharper.Refactorings.WorkflowNew.WorkflowExecuter.RunWithProgress[TResult](Func`2 action, String taskName, TResult& result) in c:\BuildAgent\work\1939c01d7b25093a\Psi.Features\src\Refactorings\_Core\src\WorkflowNew\WorkflowExecuter.cs:line 382
     at JetBrains.ReSharper.Refactorings.WorkflowNew.WorkflowExecuter.InitPage(IRefactoringPage page) in c:\BuildAgent\work\1939c01d7b25093a\Psi.Features\src\Refactorings\_Core\src\WorkflowNew\WorkflowExecuter.cs:line 323
     at JetBrains.ReSharper.Refactorings.WorkflowNew.WorkflowExecuter.NextPage(IRefactoringPage currentPage) in c:\BuildAgent\work\1939c01d7b25093a\Psi.Features\src\Refactorings\_Core\src\WorkflowNew\WorkflowExecuter.cs:line 268
     at JetBrains.ReSharper.Refactorings.WorkflowNew.WorkflowExecuter.MoveToNextPage() in c:\BuildAgent\work\1939c01d7b25093a\Psi.Features\src\Refactorings\_Core\src\WorkflowNew\WorkflowExecuter.cs:line 167
     at JetBrains.ReSharper.Refactorings.WorkflowNew.WorkflowHostWithWizardForm.<NextClick>b__a() in c:\BuildAgent\work\1939c01d7b25093a\Psi.Features\src\Refactorings\_Core\src\WorkflowNew\WorkflowHostWithWizardForm.cs:line 161
     at JetBrains.Threading.ReentrancyGuard.Execute(String name, Action action) in c:\BuildAgent\work\1939c01d7b25093a\Platform\src\Util\src\Concurrency\ReentrancyGuard.cs:line 266
     at JetBrains.Threading.ReentrancyGuard.ExecuteOrQueue(String name, Action action) in c:\BuildAgent\work\1939c01d7b25093a\Platform\src\Util\src\Concurrency\ReentrancyGuard.cs:line 304
     at JetBrains.ReSharper.Refactorings.WorkflowNew.WorkflowHostWithWizardForm.NextClick(Object sender, EventArgs e) in c:\BuildAgent\work\1939c01d7b25093a\Psi.Features\src\Refactorings\_Core\src\WorkflowNew\WorkflowHostWithWizardForm.cs:line 162
     at JetBrains.ReSharper.Refactorings.WorkflowW.RefactoringWizardForm.myContinueButton_Click(Object sender, EventArgs e) in c:\BuildAgent\work\1939c01d7b25093a\Psi.Features\src\Refactorings\_Core\src\WorkflowW\RefactoringWizardForm.cs:line 569
     at System.Windows.Forms.Control.OnClick(EventArgs e)
     at System.Windows.Forms.Button.OnClick(EventArgs e)
     at System.Windows.Forms.Button.OnMouseUp(MouseEventArgs mevent)
     at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
     at System.Windows.Forms.Control.WndProc(Message& m)
     at System.Windows.Forms.ButtonBase.WndProc(Message& m)
     at System.Windows.Forms.Button.WndProc(Message& m)
     at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
     at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
     at System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)