在Flutter中使用LayoutBuilder时，BoxConstraints会强制无限宽度

Question

将width类的container中提取的constraints.biggest赋予LayoutBuilder时，出现错误。我制作了一个ResponsiveSafeArea类，其中LayoutBuilder包裹在SafeArea周围，以便在需要时使用它

════════ Exception caught by rendering library ═════════════════════════════════
BoxConstraints forces an infinite width.

下面是代码

class HomePage extends StatelessWidget {
   static List foodItemInfoList = [ ... ];
   ScrollController _scrollController = new ScrollController();


  @override
  Widget build(BuildContext context) {
    return ResponsiveSafeArea(
      builder: (context, widgetSize ) =>

      Stack(
        fit: StackFit.loose,
        children: <Widget>[
          CustomScrollView(
            controller: _scrollController,
            slivers: <Widget>[
             
              SliverPersistentHeader( ... ),
              
              SliverToBoxAdapter(
                child: Column(
                  children: <Widget>[
                    Container( ... ),

/// ~~~~~~~~~~~~~~~~ BELOW CONTAINER IS CULPRIT
                    Container(
                      height: widgetSize.height * 0.12,
                      color: Colors.pink,
                      child: FoodCategorySlider(),
                    ),

                  ],
                ),
              ),
            ],
          ),
        ],
      ),
    }
  }

class FoodCategorysectionItem extends StatelessWidget {
  FoodCategorysectionItem(this.foodCtgItem);
  final Map foodCtgItem; 
  
@override
  Widget build(BuildContext context) {
    return ResponsiveSafeArea(
      builder: (context, widgetSize) => Container(
        color: Colors.orange,
    
        width: widgetSize.width * 0.4,  // ---------------------------- HERE GIVING WIDTH GIVEs ERROR 
           ),
        );
     }
  }

class FoodCategorySlider extends StatelessWidget {
  // List for testing
  static List FoodCatgSectionItemList = [ ... ];

  @override
  Widget build(BuildContext context) {
  
    return ResponsiveSafeArea(
      builder: (context, widgetSize) => Container(
        height: widgetSize.height,
        child: ListView.builder(
          scrollDirection: Axis.horizontal,
          itemCount: FoodCatgSectionItemList.length, 
          itemBuilder: (context, index) {
            return FoodCategorysectionItem(FoodCatgSectionItemList[index]);
          },
        ),
      ),
    );
  }
}

import 'package:flutter/material.dart';
typedef ResponsiveBuilder = Widget Function(
  BuildContext context,
  Size,
);

class ResponsiveSafeArea extends StatelessWidget {
  final ResponsiveBuilder responsiveBuilder;

  const ResponsiveSafeArea({
    Key key,
    @required ResponsiveBuilder builder,
  })  : responsiveBuilder = builder,
        super(key: key);

  @override
  Widget build(BuildContext context) {
    return SafeArea(
      child: LayoutBuilder(
        builder: (context, constraints) {
          return responsiveBuilder(
            context,
            constraints.biggest,
          );
        },
      ),
    );
  }
}