RSRP-294242: Object reference not set to an instance of an object.

  at JetBrains.ProjectModel.ProjectImpl.AssertIsValid() in c:\BuildAgent\work\3355b838ddaf4e5c\Platform\src\Projects\src\model2\ProjectImplementation\ProjectImpl.cs:line 241
     at JetBrains.ProjectModel.Impl.GuidProjectReference.AssertIsValid() in c:\BuildAgent\work\3355b838ddaf4e5c\Platform\src\Projects\src\model2\References\Impl\GuidProjectReference.cs:line 100
     at JetBrains.ProjectModel.Model2.Assemblies.Impl.ModuleReferencesResolveStore.TryResolve(IProjectToProjectReference projectToProjectReference) in c:\BuildAgent\work\3355b838ddaf4e5c\Platform\src\Projects\src\model2\Assemblies\Impl\ModuleReferencesResolveStore.cs:line 208
     at JetBrains.ProjectModel.Model2.Assemblies.Impl.ModuleReferencesResolveStore.<UpdateUnresolved>b__18(IProjectToProjectReference projectUnresolvedReference) in c:\BuildAgent\work\3355b838ddaf4e5c\Platform\src\Projects\src\model2\Assemblies\Impl\ModuleReferencesResolveStore.cs:line 288
     at System.Linq.Enumerable.WhereSelectEnumerableIterator`2.MoveNext()
     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 JetBrains.ProjectModel.Model2.Assemblies.Impl.ModuleReferencesResolveStore.UpdateUnresolved() in c:\BuildAgent\work\3355b838ddaf4e5c\Platform\src\Projects\src\model2\Assemblies\Impl\ModuleReferencesResolveStore.cs:line 287
     at JetBrains.ProjectModel.Model2.Assemblies.Impl.ModuleReferencesResolveStore.FireProjectAdded(IProject project) in c:\BuildAgent\work\3355b838ddaf4e5c\Platform\src\Projects\src\model2\Assemblies\Impl\ModuleReferencesResolveStore.cs:line 318
     at JetBrains.ProjectModel.Assemblies.Impl.ModuleReferenceResolveSync.MyVisitor.VisitDelta(ProjectModelChange changeDelta) in c:\BuildAgent\work\3355b838ddaf4e5c\Platform\src\Projects\src\model2\Assemblies\Impl\ModuleReferenceResolveSync.cs:line 167
     at JetBrains.ProjectModel.RecursiveProjectModelChangeDeltaVisitor.VisitItemDelta(ProjectItemChange change) in c:\BuildAgent\work\3355b838ddaf4e5c\Platform\src\Projects\src\changes\RecursiveProjectModelChangeDeltaVisitor.cs:line 37
     at JetBrains.ProjectModel.ProjectItemChange.Accept(IProjectModelChangeDeltaVisitor visitor) in c:\BuildAgent\work\3355b838ddaf4e5c\Platform\src\Projects\src\changes\ProjectItemChange.cs:line 49
     at JetBrains.ProjectModel.RecursiveProjectModelChangeDeltaVisitor.VisitDelta(ProjectModelChange changeDelta) in c:\BuildAgent\work\3355b838ddaf4e5c\Platform\src\Projects\src\changes\RecursiveProjectModelChangeDeltaVisitor.cs:line 30
     at JetBrains.ProjectModel.Assemblies.Impl.ModuleReferenceResolveSync.MyVisitor.VisitDelta(ProjectModelChange changeDelta) in c:\BuildAgent\work\3355b838ddaf4e5c\Platform\src\Projects\src\model2\Assemblies\Impl\ModuleReferenceResolveSync.cs:line 160
     at JetBrains.ProjectModel.RecursiveProjectModelChangeDeltaVisitor.VisitSolutionDelta(SolutionChange change) in c:\BuildAgent\work\3355b838ddaf4e5c\Platform\src\Projects\src\changes\RecursiveProjectModelChangeDeltaVisitor.cs:line 52
     at JetBrains.ProjectModel.SolutionChange.Accept(IProjectModelChangeDeltaVisitor visitor) in c:\BuildAgent\work\3355b838ddaf4e5c\Platform\src\Projects\src\changes\SolutionChange.cs:line 30
     at JetBrains.ProjectModel.Assemblies.Impl.ModuleReferenceResolveSync.Execute(IChangeMap changeMap) in c:\BuildAgent\work\3355b838ddaf4e5c\Platform\src\Projects\src\model2\Assemblies\Impl\ModuleReferenceResolveSync.cs:line 128
     at JetBrains.Application.Changes.ChangeManagerImpl.<>c__DisplayClassb.<InvokeOrderedDependentProviders>b__a(IProgressIndicator pro) in c:\BuildAgent\work\3355b838ddaf4e5c\Platform\src\Shell\src\changes\ChangeManagerImpl.cs:line 262

  at JetBrains.Application.Changes.ChangeManagerImpl.<>c__DisplayClassb.<InvokeOrderedDependentProviders>b__a(IProgressIndicator pro) in c:\BuildAgent\work\3355b838ddaf4e5c\Platform\src\Shell\src\changes\ChangeManagerImpl.cs:line 266
     at JetBrains.Application.Progress.SimpleTaskExecutor.ExecuteTask(String name, TaskCancelable cancelable, Action`1 task) in c:\BuildAgent\work\3355b838ddaf4e5c\Platform\src\Shell\src\Progress\SimpleTaskExecutor.cs:line 66
     at JetBrains.Application.Changes.ChangeManagerImpl.InvokeOrderedDependentProviders(ITaskExecutor executor, IEnumerable`1 dependentProviders, ChangeMap changeMap) in c:\BuildAgent\work\3355b838ddaf4e5c\Platform\src\Shell\src\changes\ChangeManagerImpl.cs:line 280
     at JetBrains.Application.Changes.ChangeManagerImpl.OnProviderChanged(IChangeProvider changeProvider, Object change, ITaskExecutor executor) in c:\BuildAgent\work\3355b838ddaf4e5c\Platform\src\Shell\src\changes\ChangeManagerImpl.cs:line 218
     at JetBrains.ProjectModel.Transaction.ProjectModelBatchChangeManager.EndTransaction(ProjectModelBatchChange projectModelBatchChange, ITaskExecutor executor) in c:\BuildAgent\work\3355b838ddaf4e5c\Platform\src\Projects\src\model2\Transaction\ProjectModelBatchChangeManager.cs:line 49
     at JetBrains.ProjectModel.Impl.ProjectModelBatchChange.Commit(ITaskExecutor executor) in c:\BuildAgent\work\3355b838ddaf4e5c\Platform\src\Projects\src\model2\Transaction\ProjectModelBatchChange.cs:line 51
     at JetBrains.ProjectModel.Transaction.ProjectModelBatchChangeCookie.Dispose() in c:\BuildAgent\work\3355b838ddaf4e5c\Platform\src\Projects\src\Transaction\ProjectModelBatchChangeCookie.cs:line 25
     at JetBrains.VsIntegration.ProjectModel.ProjectModelSynchronizer.HandleAdd(Int32 cFiles, IVsProject[] rgpProjects, Int32[] rgFirstIndices, String[] rgpszMkDocuments, Boolean files) in c:\BuildAgent\work\3355b838ddaf4e5c\Platform\src\VisualStudio\Core\src\ProjectModel\ProjectModelSynchronizer.cs:line 821
     at JetBrains.VsIntegration.ProjectModel.ProjectModelSynchronizer.TryGetOrCreateProjectItemByHierarchyItem_MiscFile(VsHierarchyItem hitem) in c:\BuildAgent\work\3355b838ddaf4e5c\Platform\src\VisualStudio\Core\src\ProjectModel\ProjectModelSynchronizer.cs:line 485
     at JetBrains.VsIntegration.ProjectModel.ProjectModelSynchronizer.TryGetOrCreateProjectItemByHierarchyItem(VsHierarchyItem hitem) in c:\BuildAgent\work\3355b838ddaf4e5c\Platform\src\VisualStudio\Core\src\ProjectModel\ProjectModelSynchronizer.cs:line 441
     at JetBrains.VsIntegration.Whidbey.DocumentModel.VsDocumentManagerWhidbey.OnRegisterTextBuffer(VsTextBufferData textBufferData) in c:\BuildAgent\work\3355b838ddaf4e5c\Platform\src\VisualStudio\Core\src\DocumentModel\Whidbey\VsDocumentManagerWhidbey.cs:line 440
     at JetBrains.VsIntegration.Whidbey.DocumentModel.VsDocumentManagerWhidbey.<>c__DisplayClass1d.<OnRdtAfterFirstDocumentLock>b__1c() in c:\BuildAgent\work\3355b838ddaf4e5c\Platform\src\VisualStudio\Core\src\DocumentModel\Whidbey\VsDocumentManagerWhidbey.cs:line 368
     at JetBrains.Application.IShellLocksEx.ExecuteWithReadLock(IShellLocks thіs, Action F) in c:\BuildAgent\work\3355b838ddaf4e5c\Platform\src\Shell\src\Threading\ShellLocks.cs:line 989
     at JetBrains.VsIntegration.Whidbey.DocumentModel.VsDocumentManagerWhidbey.<>c__DisplayClass1d.<OnRdtAfterFirstDocumentLock>b__1b() in c:\BuildAgent\work\3355b838ddaf4e5c\Platform\src\VisualStudio\Core\src\DocumentModel\Whidbey\VsDocumentManagerWhidbey.cs:line 361
     at JetBrains.Util.LogCookie.Execute(String comment, Action F) in c:\BuildAgent\work\3355b838ddaf4e5c\Platform\src\Util\src\Logger\LogCookie.cs:line 37
     at JetBrains.VsIntegration.Whidbey.DocumentModel.VsDocumentManagerWhidbey.<>c__DisplayClass1d.<OnRdtAfterFirstDocumentLock>b__1a() in c:\BuildAgent\work\3355b838ddaf4e5c\Platform\src\VisualStudio\Core\src\DocumentModel\Whidbey\VsDocumentManagerWhidbey.cs:line 361
     at JetBrains.Util.Concurrency.UnguardedCallbackMerger.<>c__DisplayClass3.<ExecuteOrQueueOrMerge>b__0() in c:\BuildAgent\work\3355b838ddaf4e5c\Platform\src\Util\src\Concurrency\UnguardedCallbackMerger.cs:line 139
     at JetBrains.Threading.ReentrancyGuard.Execute(String name, Action action) in c:\BuildAgent\work\3355b838ddaf4e5c\Platform\src\Util\src\Concurrency\ReentrancyGuard.cs:line 266
     at JetBrains.Threading.ReentrancyGuard.TryExecute(String name, Action action) in c:\BuildAgent\work\3355b838ddaf4e5c\Platform\src\Util\src\Concurrency\ReentrancyGuard.cs:line 415
     at JetBrains.Threading.ReentrancyGuardEx.ExecuteOrQueue(ReentrancyGuard thіs, Lifetime lifetime, String name, Action F) in c:\BuildAgent\work\3355b838ddaf4e5c\Platform\src\Util\src\Concurrency\ReentrancyGuardEx.cs:line 64
     at JetBrains.Util.Concurrency.UnguardedCallbackMerger.ExecuteOrQueueOrMerge(Lifetime lifetimeQueue, String name, Action F) in c:\BuildAgent\work\3355b838ddaf4e5c\Platform\src\Util\src\Concurrency\UnguardedCallbackMerger.cs:line 136
     at JetBrains.VsIntegration.Whidbey.DocumentModel.VsDocumentManagerWhidbey.OnRdtAfterFirstDocumentLock(EventArgs`1 args) in c:\BuildAgent\work\3355b838ddaf4e5c\Platform\src\VisualStudio\Core\src\DocumentModel\Whidbey\VsDocumentManagerWhidbey.cs:line 361
     at JetBrains.DataFlow.Signal`1.NotifySinks(TValue payload) in c:\BuildAgent\work\3355b838ddaf4e5c\Platform\src\Util\src\DataFlow\Signal!1.cs:line 363
     at JetBrains.DataFlow.Signal`1.Fire(TValue value, Object cookie) in c:\BuildAgent\work\3355b838ddaf4e5c\Platform\src\Util\src\DataFlow\Signal!1.cs:line 524
     at JetBrains.DataFlow.Signal`1.Fire(TValue value) in c:\BuildAgent\work\3355b838ddaf4e5c\Platform\src\Util\src\DataFlow\Signal!1.cs:line 473
     at JetBrains.VsIntegration.Interop.Events.VsRunningDocumentTableEvents.Sink.Microsoft.VisualStudio.Shell.Interop.IVsRunningDocTableEvents.OnAfterFirstDocumentLock(UInt32 docCookie, UInt32 dwRDTLockType1, UInt32 dwReadLocksRemaining, UInt32 dwEditLocksRemaining) in c:\BuildAgent\work\3355b838ddaf4e5c\Platform\src\VisualStudio\Core\src\Interop\Events\VsRunningDocumentTableEvents.cs:line 288
     at Microsoft.VisualStudio.Shell.Interop.IVsRunningDocumentTable2.FindOrRegisterAndLockDocument(UInt32 grfRDTLockType, String pszMkDocument, IVsHierarchy pHierPreferred, UInt32 itemidPreferred, IntPtr punkDocData, IVsHierarchy& ppHierActual, UInt32& pitemidActual, IntPtr& ppunkDocDataActual, UInt32& pdwCookie)
     at Microsoft.VisualStudio.Platform.WindowManagement.Rdt.FindOrRegisterAndLockDocument(RdtFlags flags, String moniker, IVsHierarchy hier, UInt32 itemID, IntPtr punkDocData, RdtLock& rdtLock)
     at Microsoft.VisualStudio.Platform.WindowManagement.DocumentObjectSite.RegisterAndLockDocData(String lpstrMkDoc, RdtFlags rdtLockType, Object docData)
     at Microsoft.VisualStudio.Platform.WindowManagement.WindowFrame.set_DocumentSite(DocumentObjectSite value)
     at Microsoft.VisualStudio.Platform.WindowManagement.WindowManagerService.CreateContentPane(String pszName, Int32 fDockViewOn, Int32 fDocument, String lpstrMkDoc, UInt32 eCreateWindowFlags, UInt32 dwToolWinId, Object punkView, Object punkData, IServiceProvider pServiceProvider, IVsUIHierarchy pUIHierarchy, UInt32 vsid, Int32& pfDefaultPosition, Guid& rguidCmdUI, IVsWindowFrame& ppWindowFrame)
     at Microsoft.VisualStudio.OLE.Interop.IOleCommandTarget.Exec(Guid& pguidCmdGroup, UInt32 nCmdID, UInt32 nCmdexecopt, IntPtr pvaIn, IntPtr pvaOut)
     at Microsoft.VisualStudio.Editor.Implementation.CommandChainNode.InnerExec(Guid& pguidCmdGroup, UInt32 nCmdID, UInt32 nCmdexecopt, IntPtr pvaIn, IntPtr pvaOut)
     at Microsoft.VisualStudio.Editor.Implementation.CommandChainNode.Exec(Guid& pguidCmdGroup, UInt32 nCmdID, UInt32 nCmdexecopt, IntPtr pvaIn, IntPtr pvaOut)
     at Microsoft.VisualStudio.Editor.Implementation.CommandFilterWrapper.Exec(Guid& pguidCmdGroup, UInt32 nCmdID, UInt32 nCmdexecopt, IntPtr pvaIn, IntPtr pvaOut)
     at Microsoft.VisualStudio.Editor.Implementation.CommandChainNode.InnerExec(Guid& pguidCmdGroup, UInt32 nCmdID, UInt32 nCmdexecopt, IntPtr pvaIn, IntPtr pvaOut)
     at Microsoft.VisualStudio.Editor.Implementation.VsTextViewAdapter.Exec(Guid& pguidCmdGroup, UInt32 nCmdID, UInt32 nCmdexecopt, IntPtr pvaIn, IntPtr pvaOut)
     at Microsoft.VisualStudio.Editor.Implementation.VsMouseProcessor.HandleClick(MouseButtonEventArgs e)
     at Microsoft.VisualStudio.Editor.Implementation.VsMouseProcessor.PreprocessMouseLeftButtonDown(MouseButtonEventArgs e)
     at Microsoft.VisualStudio.Text.Utilities.WpfMouseProcessor.<>c__DisplayClassf.<UIElement_MouseLeftButtonDown>b__a()
     at Microsoft.VisualStudio.Text.Utilities.GuardedOperations.CallExtensionPoint(Object errorSource, Action call)
     at Microsoft.VisualStudio.Text.Utilities.WpfMouseProcessor.UIElement_MouseLeftButtonDown(Object sender, MouseButtonEventArgs e)
     at System.Windows.Input.MouseButtonEventArgs.InvokeEventHandler(Delegate genericHandler, Object genericTarget)
     at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)
     at System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs)
     at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
     at System.Windows.UIElement.ReRaiseEventAs(DependencyObject sender, RoutedEventArgs args, RoutedEvent newEvent)
     at System.Windows.UIElement.OnMouseDownThunk(Object sender, MouseButtonEventArgs e)
     at System.Windows.Input.MouseButtonEventArgs.InvokeEventHandler(Delegate genericHandler, Object genericTarget)
     at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)
     at System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs)
     at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
     at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args)
     at System.Windows.UIElement.RaiseTrustedEvent(RoutedEventArgs args)
     at System.Windows.UIElement.RaiseEvent(RoutedEventArgs args, Boolean trusted)
     at System.Windows.Input.InputManager.ProcessStagingArea()
     at System.Windows.Input.InputManager.ProcessInput(InputEventArgs input)
     at System.Windows.Input.InputProviderSite.ReportInput(InputReport inputReport)
     at System.Windows.Interop.HwndMouseInputProvider.ReportInput(IntPtr hwnd, InputMode mode, Int32 timestamp, RawMouseActions actions, Int32 x, Int32 y, Int32 wheel)
     at System.Windows.Interop.HwndMouseInputProvider.FilterMessage(IntPtr hwnd, WindowMessage msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
     at System.Windows.Interop.HwndSource.InputFilterMessage(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 MS.Internal.Threading.ExceptionFilterHelper.TryCatchWhen(Object source, Delegate method, Object args, Int32 numArgs, Delegate catchHandler)
     at System.Windows.Threading.DispatcherOperation.InvokeImpl()
     at System.Windows.Threading.DispatcherOperation.InvokeInSecurityContext(Object state)
     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 System.Windows.Threading.DispatcherOperation.Invoke()
     at System.Windows.Threading.Dispatcher.InvokeImpl(DispatcherOperation operation, CancellationToken cancellationToken, TimeSpan timeout)
     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.CallWindowProc(IntPtr wndProc, IntPtr hWnd, Int32 msg, IntPtr wParam, IntPtr lParam)
     at MS.Win32.HwndSubclass.SubclassWndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam)