Flutter CustomScrollView Bug

main.dart

import 'dart:async';

import 'package:flutter/material.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      home: Scaffold(
        appBar: AppBar(title: Text("App"),),
        body: MyHomePage(),
      )
    );
  }
}

class MyHomePage extends StatelessWidget {
  MyHomePage({Key key, this.title}) : super(key: key);

  final streamController = StreamController();

  final String title;

  @override
  Widget build(BuildContext context) {
    // Add some data
    streamController.sink.add(1);

    return CustomScrollView(
      slivers: <Widget>[
        // If we comment this SliverBoxAdapter, error "'center.parent == this': is not true" shows up
        // Error disappears on hot reload. To see error, comment SliverBoxAdapter, stop app and start.
        // SliverToBoxAdapter(child: Center(child: Icon(Icons.error),),),
        StreamBuilder(
          stream: streamController.stream,
          builder: (context,snapshot){
              if(snapshot.hasData) {
                return SliverList(
                  delegate: SliverChildListDelegate(<Widget>[Text("hi")]),
                );
              }
              return SliverFillRemaining(child: Center(child: Icon(Icons.error),),);
          },
        )
      ],
    );
  }
}