Consider the work-in-progress changes in flutter/flutter#30646 in which I change Flutter's Row widget to have a const constructor.

In the associated test, I have the following code:

testWidgets('Row is const constructable', (WidgetTester tester) async {
  const Row(
    children: <Widget>[
      Text('Billable Hours'),
    ],
  );
});

When run over that code, the analyzer produces the following error:

  error • Evaluation of this constant expression throws an exception • test/widgets/row_test.dart:32:5 • const_eval_throws_exception

Yet when I run the test, it passes:

$ flutter test test/widgets/row_test.dart 
00:05 +28: All tests passed!                                  

• Dart VM version: 2.2.1-dev.3.0.flutter-None (Tue Apr 2 13:54:28 2019 +0000) on "macos_x64"