Editor stuck in out of sync state, all services are broken

[Peter-Juhasz]

VS 17.13 P2.1

Potentially a new occurrence of #10759, at least the symptoms are the same, but don't know how to reproduce.

20250113-2050-11.5206610.mp4

This is the only log I got:

[LSP][LanguageServer.Semantic.LSPCSharpSemanticTokensProvider] [21:45:27.3641380] We are behind the C# version which is surprising. Could be an old request that wasn't cancelled, but if not, expect most future requests to fail. We were wanting 251 but C# is at 254.

Reopening the file resets and solves the issue.

[Peter-Juhasz]

[Peter-Juhasz]

I still get this from time to time, this is today with VS 17.14 P2:

[Peter-Juhasz]

Finally, here is a repro:

As soon as I commit the completion Name it is game over.

20250325-1037-13.5825862.mp4

It works if I type like super slowly, but if I type with normal speed, it messes up everything.

[davidwengier]

Thanks @Peter-Juhasz!!! I can repro this, and in fact for me it happens just before I commit the completion, just while typing the property name, as completion pops up. Timing is crucial though, and it is a little tricky, but its a start to investigate at least.

[davidwengier]

Well, you called it out in your original post, and I should have paid more attention to it: This is also caused by provisional completion. I think, somewhat hilariously, that we've actually made things faster enough that we're now hitting good enough timing to surface these bugs 🤦‍♂️