Notebook gets stuck after deleting and undoing a cell while running

[DavidKutu]

Does this issue occur when all extensions are disabled?: No

• Version: 1.61.0-insider (user setup)
• Commit: 8d30d4d
• Date: 2021-09-24T09:00:59.405Z
• Electron: 13.4.0
• Chrome: 91.0.4472.164
• Node.js: 14.16.0
• V8: 9.1.269.39-electron.0
• OS: Windows_NT x64 10.0.19043

Steps to Reproduce:

1. Run a cell
2. Delete it while its running
3. press ctrl+z
4. when the cell comes back, it thinks its still running and it can't be interrupted, even if the extension restarts or interrupts the kernel
   

[roblourens]

Were you working on this last week @DavidKutu, is there anything we want to do for September?

[DavidKutu]

I just handled the debug session on the extension, but this still happens with the editor on VS Code's side.

[roblourens]

This is part of #125668 basically

[roblourens]

Is now fixed in #125668

[IanMatthewHuff]

Looks good to me. In the log I can see an error when the cell is deleted but it's an error for a cancelled future when waiting for replies which seems appropriate for this situation.

After cmd+z the cell is back in a ready to execute state and the cell can be run.