【异常报告】（1.35.17）未将对象引用设置到对象的实例

产生：任意包含“输出到变量”的模块，用tab选择到“输出到变量”中的下拉列表，按↓键，提示异常。（但是按→键可正常弹出新建变量的菜单）

演示：（为了方便演示使用屏幕键盘，与异常本身无关）

错误截图：

任务管理器截图：

调试信息：

NullReferenceException
   在 DotNetKit.Windows.Controls.AutoCompleteComboBox.zPu0gUnBEf()
   在 DotNetKit.Windows.Controls.AutoCompleteComboBox.eIe0NAqB7r(Predicate`1  , Boolean  )
   在 DotNetKit.Windows.Controls.AutoCompleteComboBox.rJH0xLPGsh()
   在 DotNetKit.Windows.Controls.AutoCompleteComboBox.iiq0dh8WJi(Object  , KeyEventArgs  )
   在 System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)
   在 System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs)
   在 System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
   在 System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args)
   在 System.Windows.UIElement.RaiseTrustedEvent(RoutedEventArgs args)
   在 System.Windows.Input.InputManager.ProcessStagingArea()
   在 System.Windows.Input.InputManager.ProcessInput(InputEventArgs input)
   在 System.Windows.Input.InputProviderSite.ReportInput(InputReport inputReport)
   在 System.Windows.Interop.HwndKeyboardInputProvider.ReportInput(IntPtr hwnd, InputMode mode, Int32 timestamp, RawKeyboardActions actions, Int32 scanCode, Boolean isExtendedKey, Boolean isSystemKey, Int32 virtualKey)
   在 System.Windows.Interop.HwndKeyboardInputProvider.ProcessKeyAction(MSG& msg, Boolean& handled)
   在 System.Windows.Interop.HwndSource.CriticalTranslateAccelerator(MSG& msg, ModifierKeys modifiers)
   在 System.Windows.Interop.HwndSource.OnPreprocessMessage(Object param)
   在 System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
   在 System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)