在 dartpad 颤振中使用 BorderRadius 时出现问题

Question

我正在尝试使用DartPad Flutter 创建一些在颤振中使用容器的示例。一切正常，直到我使用了出现这些错误的 BorderRadius 属性：

---

错误：断言失败：file:///Users/brettmorgan/Documents/GitHub/dart-services/flutter/packages/flutter/lib/src/foundation/stack_frame.dart:115:12 匹配！= null “预期 DartError@https://storage.googleapis.com/compilation_artifacts/2.9.0-21.10.beta/dart_sdk.js:5956:7 匹配 RegExp/^(.+) (\d+):(\d+)\ s+(.+)$/."错误：错误：断言失败：file:///Users/brettmorgan/Documents/GitHub/dart-services/flutter/packages/flutter/lib/src/foundation/stack_frame.dart:115 :12 匹配！= null “预期 DartError@https://storage.googleapis.com/compilation_artifacts/2.9.0-21.10.beta/dart_sdk.js:5956:7 匹配 RegExp/^(.+) (\d+):(\d+)\ s+(.+)$/."

---

源码为：

import 'package:flutter/material.dart';

final Color blue = Colors.blue;

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      theme: ThemeData.dark().copyWith(scaffoldBackgroundColor: blue),
      debugShowCheckedModeBanner: false,
      home: Scaffold(         
        body: Center(
          child: MyWidget(),
        ),
      ),
    );
  }
}

class MyWidget extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Center(
  child: Container(
     
    decoration: const BoxDecoration(
      border: Border(
        top: BorderSide(width: 5.0, color: Color(0xFFFFDFDFFF)),
        left: BorderSide(width: 5.0, color: Color(0xFFFFDFDFFF)),
        right: BorderSide(width: 5.0, color: Color(0xFFFF7F7F88)),
        bottom: BorderSide(width: 5.0, color: Color(0xFFFF7F7F88)),
      ),
      borderRadius: BorderRadius.all(   Radius.circular(10)),
     color: Color(0xFFBFBFCC),
    ),
    margin: const EdgeInsets.all(20.0),
    padding: const EdgeInsets.all(10.0),
        
    child: Text('The Battle of containers',style : TextStyle(color:Colors.black)),
    width: 200.0,
    height: 100.0,
  ),
);
  }
}

那么，DartPad 不支持 BorderRadius 吗？

Answer 1

我发现问题出在“const”关键字上： 装饰：const BoxDecoration(line. 当我删除它时，它可以正常工作。