Sometimes TypeScript Inlay Hints Are Off

[hediet]

Sometimes inlay hints are off for a short amount of time:

It happens randomly and fixes itself quickly:

I cannot reproduce it in isolation or in the monaco editor playground, but I see it very often when working in the VS Code repo.

I think this is what happens:

• I type somewhere to trigger a delayed update
• I wait until the delay completes and the provider is asked
• I add new lines
• The provider comes back, but does not consider the edits in between
• The inlay hints are off

I'm not sure if this is an issue of the inlay hints feature or typescripts implementation.

[jrieken]

/duplicate of #145377

[vscodenpa]

Thanks for creating this issue! We figured it's covering the same as another one we already have. Thus, we closed this one as a duplicate. You can search for similar existing issues. See also our issue reporting guidelines.

Happy Coding!

[hediet]

I still do think is buggy behavior and not a problem of delays.
The initial screenshot should not be observed, regardless of delays.

I'm not sure though if this is a typescript bug or inlay hint bug.

And I can still reproduce it by doing random edits (took me some minutes though):

[jrieken]

@hediet this is still a duplicate of #145377

[hediet]

Repro steps:

• Open Monaco Editor
• Wait for 4 seconds, notice the inlay hint afer 1
• Press enter in line 1
• Wait for 1 second
• Press enter in line 1 every 100 ms
• Notice that after 3 seconds there are invalid inline suggestions

Validation:

• In the playground, click on "Compare with latest dev"
• Verify that there are no invalid inline suggestions after doing the steps again