class Color {
  const Color(this.value);

  final int value;
}

class ColorSwatch<T> extends Color {
  const ColorSwatch(super.primary);
}


// 🔥 error: Evaluation of this constant expression throws an exception. (const_eval_throws_exception at [test] lib/pure_dart.dart:13)
const ColorSwatch<int> blue = ColorSwatch<int>(0xFF2196F3);

void main() {
  print(blue);
}