Making named arguments quick fix results in invalid code

[stephane-archer]

class _InfoSection extends StatelessWidget {
  final FCPLibrary _finalCutLibrary;
  final Future<int> _finalCutLibrarySize;
  final Future<int> _renderFilesSize;
  final Future<int> _proxyMediaSize;
  final Future<int> _optimizedMediaSize;
  final Future<int> _opticalFLowFilesSize;

  const _InfoSection(
    this._finalCutLibrary,
    this._finalCutLibrarySize,
    this._renderFilesSize,
    this._proxyMediaSize,
    this._optimizedMediaSize,
    this._opticalFLowFilesSize,
  );
...
}

Making named arguments quick fix results in invalid code

expected code:

class _InfoSection extends StatelessWidget {
  final FCPLibrary _finalCutLibrary;
  final Future<int> _finalCutLibrarySize;
  final Future<int> _renderFilesSize;
  final Future<int> _proxyMediaSize;
  final Future<int> _optimizedMediaSize;
  final Future<int> _opticalFLowFilesSize;

  const _InfoSection({
    required FCPLibrary finalCutLibrary,
    required Future<int> finalCutLibrarySize,
    required Future<int> renderFilesSize,
    required Future<int> proxyMediaSize,
    required Future<int> optimizedMediaSize,
    required Future<int> opticalFLowFilesSize,
  })  : _opticalFLowFilesSize = opticalFLowFilesSize,
        _optimizedMediaSize = optimizedMediaSize,
        _proxyMediaSize = proxyMediaSize,
        _renderFilesSize = renderFilesSize,
        _finalCutLibrarySize = finalCutLibrarySize,
        _finalCutLibrary = finalCutLibrary;
...
}

[bwilkerson]

The current behavior is to convert each parameter to the form required this._finalCutLibrary. I'm guessing that the concern is that private named parameters can't be referenced outside the library in which the parameter is defined.

But in this case the class is private, so the constructor also can't be invokes outside the library, so the code is actually valid.

Is there a different problem that I'm not seeing?

[FMorschel]

@bwilkerson, the code above (and the following after this.) trigger private_optional_parameter:

class A {
  final int _field;
  A({required this._field});
}

Named parameters can't start with an underscore. dart private_optional_parameter

[bwilkerson]

I thought I had a use case earlier where there was a private named parameter and there was no diagnostic. I can't reproduce that behavior now, so I must have done something other than what I thought I had.