I was introducing a const and WHAM!! ReSharper 3.1 Version=3.1.584.3, Edition=Csharp, Built=2007-12-20T19:16:46, Configuration=ReSharper_AddIn, VsVersion=9.0 JetBrains.Util.InternalErrorException: typeDeclaration != null at JetBrains.Util.InternalErrorException..ctor(String, Exception) in c:\A\work\be08dc054b0f1225\Platform\src\JetBrains.Util\src\InternalErrorException.cs:line 29 column 7 at JetBrains.Util.Logger.Fail(String) in c:\A\work\be08dc054b0f1225\Platform\src\JetBrains.Util\src\Logger\Logger.cs:line 135 column 5 at JetBrains.Util.Logger.Assert(Boolean, String) in c:\A\work\be08dc054b0f1225\Platform\src\JetBrains.Util\src\Logger\Logger.cs:line 110 column 3 at JetBrains.ReSharper.Refactorings.Conflicts.ElementProcessor..ctor(TypeMemberQualifier) in c:\A\work\be08dc054b0f1225\src\NewRefactorings\src\Conflicts\TypeMemberQualifier.cs:line 84 column 9 at JetBrains.ReSharper.Refactorings.Conflicts.TypeMemberQualifier.Collect() in c:\A\work\be08dc054b0f1225\src\NewRefactorings\src\Conflicts\TypeMemberQualifier.cs:line 60 column 7 at JetBrains.ReSharper.Refactorings.CSharp.IntroduceVariable.CSharpIntroduceVariable.ExecuteRefactoring(IExpression, IExpression[], IType, String, Boolean) in c:\A\work\be08dc054b0f1225\src\Refactorings.CSharp\src\IntroduceVariable\CSharpIntroduceVariable.cs:line 90 column 7 at JetBrains.ReSharper.Refactorings.IntroduceVariable.IntroduceVariableRefactoring.Execute() in c:\A\work\be08dc054b0f1225\src\NewRefactorings\src\IntroduceVariable\IntroduceVariableRefactoring.cs:line 131 column 5 at SafeDevelop.RGreatEx.Refactoring.IntroduceLocalConstantWorkflow.Execute(IProgressIndicator) in D:\Repository\SafeDevelop\Projects\RGreatEx\3.0\trunk\SafeDevelop.RGreatEx\Refactoring\IntroduceLocalConstantWorkflow.cs:line 70 column 13 at JetBrains.ReSharper.Refactorings.Workflow.RefactoringExecutor.Execute(IProgressIndicator) in c:\A\work\be08dc054b0f1225\src\NewRefactorings\src\Workflow\WorkflowProcessor.cs:line 651 column 13 at JetBrains.UI.Shell.Progress.TaskHelper.Run() in c:\A\work\be08dc054b0f1225\Platform\src\JetBrains.UI\src\Shell\Progress\UITaskExecutor.cs:line 178 column 13 at JetBrains.UI.Shell.Progress.UITaskExecutor.DoRun(TaskHelper) in c:\A\work\be08dc054b0f1225\Platform\src\JetBrains.UI\src\Shell\Progress\UITaskExecutor.cs:line 264 column 5 at JetBrains.UI.Shell.Progress.UITaskExecutor.ExecuteTask(TaskHelper, String, Boolean, Boolean&) in c:\A\work\be08dc054b0f1225\Platform\src\JetBrains.UI\src\Shell\Progress\UITaskExecutor.cs:line 106 column 9 at JetBrains.UI.Shell.Progress.UITaskExecutor.ExecuteTask(TaskWithProgress, String, Boolean&) in c:\A\work\be08dc054b0f1225\Platform\src\JetBrains.UI\src\Shell\Progress\UITaskExecutor.cs:line 123 column 7 at JetBrains.ReSharper.Refactorings.Workflow.TaskExecutorWrapper.ExecuteTask(TaskWithProgress, String, Boolean&) in c:\A\work\be08dc054b0f1225\src\NewRefactorings\src\Workflow\WorkflowProcessor.cs:line 698 column 9 at JetBrains.ReSharper.Refactorings.Workflow.WorkflowProcessor.ExecuteRefactoring(Object[]) in c:\A\work\be08dc054b0f1225\src\NewRefactorings\src\Workflow\WorkflowProcessor.cs:line 448 column 9 at JetBrains.ReSharper.Psi.Impl.PsiManagerImpl.PsiManagerImpl.DoTransaction(TransactionHandler, Object[]) in c:\A\work\be08dc054b0f1225\src\Psi\src\impl\PsiManager\PsiManagerImpl.cs:line 354 column 9 at JetBrains.ReSharper.Refactorings.Workflow.WorkflowProcessor.TryExecuteRefactoring() in c:\A\work\be08dc054b0f1225\src\NewRefactorings\src\Workflow\WorkflowProcessor.cs:line 293 column 9 at JetBrains.ReSharper.Refactorings.Workflow.WorkflowProcessor.ShowNextPage() in c:\A\work\be08dc054b0f1225\src\NewRefactorings\src\Workflow\WorkflowProcessor.cs:line 189 column 13 at JetBrains.ReSharper.Refactorings.Workflow.WorkflowProcessor.MyForm_OnContinueClicked(Object, EventArgs) in c:\A\work\be08dc054b0f1225\src\NewRefactorings\src\Workflow\WorkflowProcessor.cs:line 118 column 5 at JetBrains.ReSharper.Refactorings.Workflow.RefactoringWizardForm.myContinueButton_Click(Object, EventArgs) in c:\A\work\be08dc054b0f1225\src\NewRefactorings\src\Workflow\RefactoringWizardForm.cs:line 513 column 6 at System.Windows.Forms.Control.OnClick(EventArgs) at System.Windows.Forms.Button.OnClick(EventArgs) at System.Windows.Forms.Button.OnMouseUp(MouseEventArgs) at System.Windows.Forms.Control.WmMouseUp(Message&, MouseButtons, Int32) at System.Windows.Forms.Control.WndProc(Message&) at System.Windows.Forms.ButtonBase.WndProc(Message&) at System.Windows.Forms.Button.WndProc(Message&) at System.Windows.Forms.ControlNativeWindow.OnMessage(Message&) at System.Windows.Forms.ControlNativeWindow.WndProc(Message&) at System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr, Int32, IntPtr, IntPtr) at JetBrains.Util.Logger.Fail(String messageText) in c:\A\work\be08dc054b0f1225\Platform\src\JetBrains.Util\src\Logger\Logger.cs:line 135