Incremental compilation with computed property conflicting with type parameter causes spurious error

[webstrand]

Bug Report

🔎 Search Terms

incremental compilation computed property reference type parameter

🕗 Version & Regression Information

• This changed between versions 3.8.3 and 3.9.7

⏯ Playground Link

Playground link with relevant code

💻 Code

declare const O: unique symbol;
declare class Bar<O> {
  [O]: number  // A computed property name cannot reference a type parameter from its containing type.
}

// DELETE THIS LINE TO TRIGGER ERROR

The playground exhibits the issue, as does tsc --watch.

🙁 Actual behavior

After deleting the comment line and triggering incremental compilation, the error message

src/test.ts:4:4 - error TS2467: A computed property name cannot reference a type parameter from its containing type.

3 [O]: number // A computed property name cannot reference a type parameter from its containing type.

appears.

🙂 Expected behavior

No error should appear after deleting the comment or triggering incremental compilation.