sunfora

Version

Deno 2.7.11

Repro Code

Consider test.js:

export class Example {
  static at() {
    const ex = new Example();
    ex.deep();
  }
  
  deep() {
    this.#unused();
  }

  broken(x) {
    const x = 1;
  }

  #unused() {
  }
}

Run with:

deno run -A test.js

Actual Result

error: Uncaught SyntaxError: Private field '#unused' must be declared in an enclosing class
    this.#unused();
        ^
    at <anonymous> (file:///home/ivan/Projects/bug_report/test.js:8:9)

Expected Result

There should be a SyntaxError on the redeclaration of x inside broken(x), not a misleading error about #unused.

error: Uncaught SyntaxError: Identifier 'x' has already been declared
    const x = 1;
          ^
    at <anonymous> (file:///home/ivan/Projects/bug_report/test.js:12:11)

Notes

• If you rename #unused to unused, then it works fine.
• This significantly misleads users and hides the real problem.

---

okay, it seems to be an already known issue since Jan 2025: https://issues.chromium.org/issues/386463462