When renaming an identifier using Visual Studio keyboard shortcut Ctrl+R,R, the extension crash due to a NullReferenceException

[walterlv]

Installed product versions

• Visual Studio: 2019 Professional
• This extension: 1.0.43

Description

When renaming an identifier using Visual Studio keyboard shortcut Ctrl+R,R, the extension crash due to a NullReferenceException.

Steps to recreate

1. Press Ctrl+R, R to rename an identifier
2. type a new identifier
3. during the typing, you'll find that the visual studio hang for a while
4. After the hanging, we can see that Visual Studio detected an exception
5. View the log file and find that NamR crashes.

Current behavior

This is the exception below.

System.NullReferenceException:

NamR.CompletionCommandHandler.TriggerCompletion()
NamR.CompletionCommandHandler.Exec(Guid& pguidCmdGroup, UInt32 nCmdID, UInt32 nCmdexecopt, IntPtr pvaIn, IntPtr pvaOut)
Microsoft.VisualStudio.Editor.Implementation.CommandChainNode.InnerExec(Guid& pguidCmdGroup, UInt32 nCmdID, UInt32 nCmdexecopt, IntPtr pvaIn, IntPtr pvaOut)
Microsoft.VisualStudio.Editor.Implementation.CommandChainNode.Exec(Guid& pguidCmdGroup, UInt32 nCmdID, UInt32 nCmdexecopt, IntPtr pvaIn, IntPtr pvaOut)
Microsoft.VisualStudio.Editor.Implementation.Intellisense.MultiCaretPreemptingFilterProvider.MultiCaretPreemptingFilter.Exec(Guid& pguidCmdGroup, UInt32 nCmdID, UInt32 nCmdexecopt, IntPtr pvaIn, IntPtr pvaOut)
Microsoft.VisualStudio.Editor.Implementation.CommandChainNode.InnerExec(Guid& pguidCmdGroup, UInt32 nCmdID, UInt32 nCmdexecopt, IntPtr pvaIn, IntPtr pvaOut)
Microsoft.VisualStudio.Editor.Implementation.CommandChainNode.InnerExec(Guid& pguidCmdGroup, UInt32 nCmdID, UInt32 nCmdexecopt, IntPtr pvaIn, IntPtr pvaOut)
Microsoft.VisualStudio.Editor.Implementation.SimpleTextViewWindow.Exec(Guid& pguidCmdGroup, UInt32 nCmdID, UInt32 nCmdexecopt, IntPtr pvaIn, IntPtr pvaOut)
Microsoft.VisualStudio.Editor.Implementation.VsKeyboardFilter.SendCommand(Guid cmdGroup, UInt32 cmdID, Object inParam)
Microsoft.VisualStudio.Editor.Implementation.VsKeyboardFilter.TextInput(TextCompositionEventArgs args)
Microsoft.VisualStudio.Text.Editor.Implementation.KeyProcessorDispatcher.<><DispatchTextInputEvents>b__6_0(KeyProcessor p, TextCompositionEventArgs args)
Microsoft.VisualStudio.Text.Editor.Implementation.KeyProcessorDispatcher.<>c__DisplayClass10_1`1.<Dispatch>b__0()
Microsoft.VisualStudio.Text.Utilities.GuardedOperations.CallExtensionPoint(Object errorSource, Action call)
Microsoft.VisualStudio.Telemetry.WindowsErrorReporting.WatsonReport.GetClrWatsonExceptionInfo(Exception exceptionObject)

Expected behavior

No exception.

[walterlv]

I didn't view your code but I guess that the main reason is that I'm editing multiple places but you only handle one.

If you need, I'll view the code and fix it myself.

[GKotfis]

Similar behavior when trying to use refactorings like 'Extract to method' or snippets 'propfull'.
VS2019 16.1.5
Exception:

System.NullReferenceException: Object reference not set to an instance of an object.
   at NamR.CompletionCommandHandler.TriggerCompletion()
   at NamR.CompletionCommandHandler.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.Intellisense.MultiCaretPreemptingFilterProvider.MultiCaretPreemptingFilter.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.InnerExec(Guid& pguidCmdGroup, UInt32 nCmdID, UInt32 nCmdexecopt, IntPtr pvaIn, IntPtr pvaOut)
   at Microsoft.VisualStudio.Editor.Implementation.SimpleTextViewWindow.Exec(Guid& pguidCmdGroup, UInt32 nCmdID, UInt32 nCmdexecopt, IntPtr pvaIn, IntPtr pvaOut)
   at Microsoft.VisualStudio.Editor.Implementation.VsKeyboardFilter.SendCommand(Guid cmdGroup, UInt32 cmdID, Object inParam)
   at Microsoft.VisualStudio.Editor.Implementation.VsKeyboardFilter.TextInput(TextCompositionEventArgs args)
   at Microsoft.VisualStudio.Text.Editor.Implementation.KeyProcessorDispatcher.<>c.<DispatchTextInputEvents>b__6_0(KeyProcessor p, TextCompositionEventArgs args)
   at Microsoft.VisualStudio.Text.Editor.Implementation.KeyProcessorDispatcher.<>c__DisplayClass10_1`1.<Dispatch>b__0()
   at Microsoft.VisualStudio.Text.Utilities.GuardedOperations.CallExtensionPoint(Object errorSource, Action call)
--- End of stack trace from previous location where exception was thrown ---
   at Microsoft.VisualStudio.Telemetry.WindowsErrorReporting.WatsonReport.GetClrWatsonExceptionInfo(Exception exceptionObject)

Right now I need to disable it :(