Steps to reproduce

1. Have a DatePickerDialog in your app that can reach its narrow form, and have M3 enabled
2. Run the app (I tried macOS, CanvasKit, and skwasm)
3. Open the date picker if necessary
4. Adjust screen so DatePicker can be in its narrow mode
5. Switch to a month that has 6 rows, such as December 2023
6. Move mouse around within dates view to see scroll bar

Expected results

Since all rows can be displayed just fine in the dialog, no scroll bar should be there when moving the mouse. No scrolling is possible anyway.

Actual results

A scrollbar that does nothing shows up in weeks with 6 rows.

Code sample

import 'package:flutter/material.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        body: Center(
          child: DatePickerDialog(
            initialDate: DateTime(2023, DateTime.december, 25),
            firstDate: DateTime.utc(2010),
            lastDate: DateTime.utc(2030),
          ),
        ),
      ),
    );
  }
}

Screenshots

Flutter version info

Flutter 3.19.0-3.0.pre.43 • channel main • https://github.com/flutter/flutter
Framework • revision f961fdf2ba (4 hours ago) • 2024-01-10 17:37:07 -0500
Engine • revision a045134c91
Tools • Dart 3.4.0 (build 3.4.0-14.0.dev) • DevTools 2.31.0