First hover is no longer syntax-highlighted again

[Gama11]

Recently, I've been noticing the exact same issue as described in #53723 again. Possibly this has regressed in the 1.37 release.

[alexr00]

Leaving for @aeschli.

[aeschli]

I'm able to reproduce with the haxe sample.

@alexandrudima I believe the problem is here:

vscode/src/vs/workbench/services/textMate/browser/abstractTextMateService.ts

Line 231 in b0d58e4

this._tokenizersRegistrations.push(TokenizationRegistry.registerPromise(modeId, promise));

The _tokenizersRegistrations promise is only registered once the _getOrCreateGrammarFactory is completed. It also needs to go in the promise.

I can do the fix, if thats ok for you.

[alexdima]

@aeschli I think this was a regressions from my recent refactorings. I'd like to understand it...

[alexdima]

Repro steps:

1. Open a fresh VS Code with a .js file.
2. Be sure to not open by accident a TS file before or in parallel
3. Hover over something in the .js file
4. The first hover is not colored: