VS2022 Colouring is broken when resetting "Fonts and Colors" to default values

[vzarytovskii]

DISCLAIMER: Please, don't try reproducing it on your VS 17.4+ instance, since you will likely have a broken colouring till the fix is released.

When resetting fonts and colors to default values (Tools -> Options -> Environment -> Fonts and Colors), reloading VS and deleting .vs, VS treats everything as plain text (except keywords):

[vzarytovskii]

It does not reproduce in 17.3

[0101]

Caused by new preview feature in VS: dotnet/roslyn#64168

Fix at the moment is disabling C#/VB LSP semantic tokens experience under Environment -> Preview Features.

[psfinaki]

@vzarytovskii so this still repros with the above preview feature on.

The matching roslyn issue is here. In the light of LSP 👀 , I'd say it would be enough if this VS setting just doesn't have an effect on F# (as opposed to trying to somehow propagate the logic thru the Roslyn interfaces) - do you agree?

[psfinaki]

We talked with @dibarbet about this one:

• LSP is not going to be enabled in the near future
• Roslyn doesn't plan to implement F# support for this really
• It also shouldn't effect the F# colorization based on the implementation
• The whole thing doesn't reproduce for David

On the other hand, I get disappearing colorization quite often, but only when working with our repo - and also it then randomly appears again, so my case might be unrelated.

Based on this and low activity here for the 2 years, I'll deprio this to Medium for now.