render_flex_children_have_non_zero_flex - broken.dart

Widget brokenCodeRenderFlexError =
  Column(
    /// A Column's default is "mainAxisSize: MainAxisSize.max,"
    /// This means it will try to take all the height it's allowed to.
    children: <Widget>[
      Container(
        height: 300,
        width: double.infinity,
        color: Colors.red,
      ),
      /// The next container is trying to be infinitely large
      Container(
        height: double.infinity,
        color: Colors.green,
      ),
    ],
  );