OverlayEntry should dispose _overlayEntryStateNotifier.

[polina-c]

While comment is stating that disposal should happen in _didUnmount, it does not happen in the test: #133921

  void dispose() {
    assert(!_disposedByOwner);
    assert(_overlay == null, 'An OverlayEntry must first be removed from the Overlay before dispose is called.');
    _disposedByOwner = true;
    if (!mounted) {
      // If we're still mounted when disposed, then this will be disposed in
      // _didUnmount, to allow notifications to occur until the entry is
      // unmounted.
      _overlayEntryStateNotifier?.dispose();
      _overlayEntryStateNotifier = null;
    }
  }

[polina-c]

If the test both remove and dispose overlay, the issue disappears:

    late OverlayEntry overlayEntry;
    addTearDown(() => overlayEntry..remove()..dispose());

Added doc: dart-lang/leak_tracker#142

[github-actions]

This thread has been automatically locked since there has not been any recent activity after it was closed. If you are still experiencing a similar issue, please open a new bug, including the output of flutter doctor -v and a minimal reproduction of the issue.