Incorrect TS1111 when using private generator function in JS

[Ecco]

🔎 Search Terms

An error TS1111 is raised when (properly) using a private generator function. I'm using VSCode, and it will report Private field '#iterate' must be declared in an enclosing class. when calling child.#iterate().

🕗 Version & Regression Information

• I'm hitting this in VSCode 1.135.0

💻 Code

class Foo {
  *iterate() {
    yield* this.#iterate()
  }

  *#iterate() {
    const child = this.child
    if (child instanceof this.constructor) {
      yield* child.#iterate()
    }
  }
}

let f = new Foo()
for (const i of f.iterate()) {

}

🙁 Actual behavior

An error TS1111 is raised.

🙂 Expected behavior

There should be no error.

Additional information about the issue

1. The error disappears if I call this.#iterate(), but of course that's not the point.
2. I can also clear the error by adding assert(#iterate in child) before the call

[nmain]

Could you make sure your example is complete? When I copy your code to a playground I get a few TS2339 but no TS1111.