Weird error message when running flutter run - flutter

Question

Yesterday I updated my flutter version for the beta channel from 1.14.6 to 1.15.17. My app was running successfully yesterday. Now, the command flutter run gives me error message
How can I solve it??

Answer 1

There is an open issue of flushbar
https://github.com/AndreHaueisen/flushbar/issues/113#issuecomment-599857258
This is workaround you can use before release
dependencies:
flutter:
sdk: flutter
flushbar:
git:
url: https://github.com/AndreHaueisen/flushbar.git
ref: 13c55a8
full test code
import 'package:flutter/material.dart';
import 'package:flushbar/flushbar.dart';
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
#override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: MyHomePage(title: 'Flutter Demo Home Page'),
);
}
}
class MyHomePage extends StatefulWidget {
MyHomePage({Key key, this.title}) : super(key: key);
final String title;
#override
_MyHomePageState createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
int _counter = 0;
void _incrementCounter() {
Flushbar(
title: "Hey Ninja",
message:
"Lorem Ipsum is simply dummy text of the printing and typesetting industry",
flushbarPosition: FlushbarPosition.TOP,
flushbarStyle: FlushbarStyle.FLOATING,
reverseAnimationCurve: Curves.decelerate,
forwardAnimationCurve: Curves.elasticOut,
backgroundColor: Colors.red,
boxShadows: [
BoxShadow(
color: Colors.blue[800], offset: Offset(0.0, 2.0), blurRadius: 3.0)
],
backgroundGradient:
LinearGradient(colors: [Colors.blueGrey, Colors.black]),
isDismissible: true,
duration: Duration(seconds: 10),
icon: Icon(
Icons.check,
color: Colors.greenAccent,
),
mainButton: FlatButton(
onPressed: () {
print("clap");
},
child: Text(
"CLAP",
style: TextStyle(color: Colors.amber),
),
),
showProgressIndicator: true,
progressIndicatorBackgroundColor: Colors.blueGrey,
titleText: Text(
"Hello Hero",
style: TextStyle(
fontWeight: FontWeight.bold,
fontSize: 20.0,
color: Colors.yellow[600],
fontFamily: "ShadowsIntoLightTwo"),
),
messageText: Text(
"You killed that giant monster in the city. Congratulations!",
style: TextStyle(
fontSize: 18.0,
color: Colors.green,
fontFamily: "ShadowsIntoLightTwo"),
),
)..show(context);
setState(() {
_counter++;
});
}
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(widget.title),
),
body: Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
Text(
'You have pushed the button this many times:',
),
Text(
'$_counter',
style: Theme.of(context).textTheme.display1,
),
],
),
),
floatingActionButton: FloatingActionButton(
onPressed: _incrementCounter,
tooltip: 'Increment',
child: Icon(Icons.add),
),
);
}
}