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Failed assertion: line 2283 pos 14: '_debugSubtreeRelayoutRootAlreadyMarkedNeedsLayout()': is not true
Steps to reproduce
I have attached a sample code to reproduce the bug. Click the "crash me!" button twice. This issue seems to disappear when the layout builder is removed.
Expected results
The counter should increment without any crashes.
Actual results
A crash occurs.
Code sample
Code sample
import 'package:flutter/material.dart';
import 'package:flutter_bloc/flutter_bloc.dart';
import 'package:go_router/go_router.dart';
final GlobalKey<NavigatorState> _rootNavigatorKey =
GlobalKey<NavigatorState>(debugLabel: 'root');
final GlobalKey<NavigatorState> _sectionANavigatorKey =
GlobalKey<NavigatorState>(debugLabel: 'sectionANav');
class BlocState {
final int counter;
BlocState(this.counter);
}
class BlocEvent {
final int counter;
BlocEvent(this.counter);
}
class BlocCounter extends Bloc<BlocEvent, BlocState> {
BlocCounter() : super(BlocState(0)) {
on<BlocEvent>(_changeCounter);
}
_changeCounter(BlocEvent event, Emitter<BlocState> emit) {
emit(BlocState(event.counter));
}
}
final blocInstance = BlocCounter();
void main() {
runApp(NestedTabNavigationExampleApp());
}
/// An example demonstrating how to use nested navigators
class NestedTabNavigationExampleApp extends StatelessWidget {
/// Creates a NestedTabNavigationExampleApp
NestedTabNavigationExampleApp({super.key});
final GoRouter _router = GoRouter(
navigatorKey: _rootNavigatorKey,
initialLocation: '/a/details',
routes: <RouteBase>[
StatefulShellRoute.indexedStack(
builder: (BuildContext context, GoRouterState state,
StatefulNavigationShell navigationShell) {
// Return the widget that implements the custom shell (in this case
// using a BottomNavigationBar). The StatefulNavigationShell is passed
// to be able access the state of the shell and to navigate to other
// branches in a stateful way.
return ScaffoldWithNavBar(navigationShell: navigationShell);
},
branches: <StatefulShellBranch>[
// The route branch for the first tab of the bottom navigation bar.
StatefulShellBranch(
navigatorKey: _sectionANavigatorKey,
routes: <RouteBase>[
GoRoute(
// The screen to display as the root in the first tab of the
// bottom navigation bar.
path: '/a',
builder: (BuildContext context, GoRouterState state) =>
const RootScreen(label: 'A', detailsPath: '/a/details'),
routes: <RouteBase>[
// The details screen to display stacked on navigator of the
// first tab. This will cover screen A but not the application
// shell (bottom navigation bar).
GoRoute(
path: 'details',
builder: (BuildContext context, GoRouterState state) =>
const DetailsScreen(label: 'A'),
),
],
),
],
),
// The route branch for the second tab of the bottom navigation bar.
StatefulShellBranch(
// It's not necessary to provide a navigatorKey if it isn't also
// needed elsewhere. If not provided, a default key will be used.
routes: <RouteBase>[
GoRoute(
// The screen to display as the root in the second tab of the
// bottom navigation bar.
path: '/b',
builder: (BuildContext context, GoRouterState state) =>
const RootScreen(
label: 'B',
detailsPath: '/b/details/1',
secondDetailsPath: '/b/details/2',
),
routes: <RouteBase>[
GoRoute(
path: 'details/:param',
builder: (BuildContext context, GoRouterState state) =>
DetailsScreen(
label: 'B',
param: state.pathParameters['param'],
),
),
],
),
],
),
// The route branch for the third tab of the bottom navigation bar.
StatefulShellBranch(
routes: <RouteBase>[
GoRoute(
// The screen to display as the root in the third tab of the
// bottom navigation bar.
path: '/c',
builder: (BuildContext context, GoRouterState state) =>
const RootScreen(
label: 'C',
detailsPath: '/c/details',
),
routes: <RouteBase>[
GoRoute(
path: 'details',
builder: (BuildContext context, GoRouterState state) =>
DetailsScreen(
label: 'C',
extra: state.extra,
),
),
],
),
],
),
],
),
],
);
@override
Widget build(BuildContext context) {
return BlocProvider(
create: (context) => blocInstance,
child: MaterialApp.router(
title: 'Flutter Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
),
routerConfig: _router,
),
);
}
}
/// Builds the "shell" for the app by building a Scaffold with a
/// BottomNavigationBar, where [child] is placed in the body of the Scaffold.
class ScaffoldWithNavBar extends StatelessWidget {
/// Constructs an [ScaffoldWithNavBar].
const ScaffoldWithNavBar({
required this.navigationShell,
Key? key,
}) : super(key: key ?? const ValueKey<String>('ScaffoldWithNavBar'));
/// The navigation shell and container for the branch Navigators.
final StatefulNavigationShell navigationShell;
@override
Widget build(BuildContext context) {
final counterState = context.watch<BlocCounter>().state;
return LayoutBuilder(
builder: (BuildContext context, BoxConstraints constraint) {
double width = constraint.maxWidth;
final Widget narrowContent = ConstrainedBox(
constraints: BoxConstraints(
minHeight: MediaQuery.of(context).size.height,
),
child: navigationShell,
);
late final Widget body;
if (counterState.counter.isEven) {
body = Stack(children: [
Positioned.fill(child: narrowContent),
]);
} else {
body = Column(children: [Expanded(child: narrowContent)]);
}
final Widget rightArea = SafeArea(
// key: const Key('right_area'),
child: Align(
alignment: Alignment.center,
child: ConstrainedBox(
constraints: const BoxConstraints(
maxWidth: 800,
),
child: body,
),
),
);
return Scaffold(
body: rightArea,
bottomNavigationBar: BottomNavigationBar(
// Here, the items of BottomNavigationBar are hard coded. In a real
// world scenario, the items would most likely be generated from the
// branches of the shell route, which can be fetched using
// `navigationShell.route.branches`.
items: const <BottomNavigationBarItem>[
BottomNavigationBarItem(
icon: Icon(Icons.home), label: 'Section A'),
BottomNavigationBarItem(
icon: Icon(Icons.work), label: 'Section B'),
BottomNavigationBarItem(
icon: Icon(Icons.tab), label: 'Section C'),
],
currentIndex: navigationShell.currentIndex,
onTap: (int index) => _onTap(context, index),
),
);
},
);
}
/// Navigate to the current location of the branch at the provided index when
/// tapping an item in the BottomNavigationBar.
void _onTap(BuildContext context, int index) {
// When navigating to a new branch, it's recommended to use the goBranch
// method, as doing so makes sure the last navigation state of the
// Navigator for the branch is restored.
navigationShell.goBranch(
index,
// A common pattern when using bottom navigation bars is to support
// navigating to the initial location when tapping the item that is
// already active. This example demonstrates how to support this behavior,
// using the initialLocation parameter of goBranch.
initialLocation: index == navigationShell.currentIndex,
);
}
}
/// Widget for the root/initial pages in the bottom navigation bar.
class RootScreen extends StatelessWidget {
/// Creates a RootScreen
const RootScreen({
required this.label,
required this.detailsPath,
this.secondDetailsPath,
super.key,
});
/// The label
final String label;
/// The path to the detail page
final String detailsPath;
/// The path to another detail page
final String? secondDetailsPath;
@override
Widget build(BuildContext context) {
final counterState = context.watch<BlocCounter>().state;
if (counterState.counter.isEven) {
return Scaffold(body: const CircularProgressIndicator());
} else {
return Text('Screen $label',
style: Theme.of(context).textTheme.titleLarge);
}
}
}
/// The details screen for either the A or B screen.
class DetailsScreen extends StatefulWidget {
/// Constructs a [DetailsScreen].
const DetailsScreen({
required this.label,
this.param,
this.extra,
this.withScaffold = true,
super.key,
});
/// The label to display in the center of the screen.
final String label;
/// Optional param
final String? param;
/// Optional extra object
final Object? extra;
/// Wrap in scaffold
final bool withScaffold;
@override
State<StatefulWidget> createState() => DetailsScreenState();
}
/// The state for DetailsScreen
class DetailsScreenState extends State<DetailsScreen> {
int _counter = 0;
@override
Widget build(BuildContext context) {
if (widget.withScaffold) {
return Scaffold(
appBar: AppBar(
title: Text('Details Screen - ${widget.label}'),
),
body: _build(context),
);
} else {
return ColoredBox(
color: Theme.of(context).scaffoldBackgroundColor,
child: _build(context),
);
}
}
Widget _build(BuildContext context) {
final counterState = context.watch<BlocCounter>().state;
return Center(
child: Column(
mainAxisSize: MainAxisSize.min,
children: <Widget>[
Text('Details for ${widget.label} - Counter: ${counterState.counter}',
style: Theme.of(context).textTheme.titleLarge),
const Padding(padding: EdgeInsets.all(4)),
TextButton(
onPressed: () {
setState(() {
blocInstance.add(BlocEvent(blocInstance.state.counter + 1));
});
},
child: const Text('Crash me!'),
),
const Padding(padding: EdgeInsets.all(8)),
if (widget.param != null)
Text('Parameter: ${widget.param!}',
style: Theme.of(context).textTheme.titleMedium),
const Padding(padding: EdgeInsets.all(8)),
if (widget.extra != null)
Text('Extra: ${widget.extra!}',
style: Theme.of(context).textTheme.titleMedium),
if (!widget.withScaffold) ...<Widget>[
const Padding(padding: EdgeInsets.all(16)),
TextButton(
onPressed: () {
GoRouter.of(context).pop();
},
child: const Text('< Back',
style: TextStyle(fontWeight: FontWeight.bold, fontSize: 18)),
),
]
],
),
);
}
}
Pubspec
name: go_router_bug
description: "A new Flutter project."
# Prevent accidental publishing to pub.dev.
publish_to: 'none'
version: 1.0.0+1
environment:
sdk: '>=3.3.4 <4.0.0'
dependencies:
go_router: ^14.0.0
flutter_bloc: ^8.1.5
flutter:
sdk: flutter
flutter_localizations:
sdk: flutter
dev_dependencies:
flutter_test:
sdk: flutter
flutter_lints: ^3.0.0
flutter:
uses-material-design: true
# Enable generation of localized Strings from arb files.
generate: true
assets:
# Add assets from the images directory to the application.
- assets/images/
Screenshots or Video
Screenshots / Video demonstration
[Upload media here]
Logs
Logs
======== Exception caught by widgets library =======================================================
The following assertion was thrown building RootScreen(dependencies: [_InheritedProviderScope<BlocCounter?>, _InheritedTheme, _LocalizationsScope-[GlobalKey#10e8b]]):
'package:flutter/src/rendering/object.dart': Failed assertion: line 2283 pos 14: '_debugSubtreeRelayoutRootAlreadyMarkedNeedsLayout()': is not true.
Either the assertion indicates an error in the framework itself, or we should provide substantially more information in this error message to help you determine and fix the underlying cause.
In either case, please report this assertion by filing a bug on GitHub:
https://github.com/flutter/flutter/issues/new?template=2_bug.yml
The relevant error-causing widget was:
RootScreen RootScreen:file:///Users/shady/Projects/go_router_bug/lib/main.dart:66:27
When the exception was thrown, this was the stack:
#2 RenderObject.markNeedsLayout (package:flutter/src/rendering/object.dart:2283:14)
#3 RenderBox.markNeedsLayout (package:flutter/src/rendering/box.dart:2379:11)
#4 RenderObject.dropChild (package:flutter/src/rendering/object.dart:1863:5)
#5 RenderObjectWithChildMixin.child= (package:flutter/src/rendering/object.dart:4051:7)
#6 SingleChildRenderObjectElement.removeRenderObjectChild (package:flutter/src/widgets/framework.dart:6787:18)
#7 RenderObjectElement.detachRenderObject (package:flutter/src/widgets/framework.dart:6601:37)
#8 Element.detachRenderObject.<anonymous closure> (package:flutter/src/widgets/framework.dart:4202:13)
#9 ComponentElement.visitChildren (package:flutter/src/widgets/framework.dart:5532:14)
#10 Element.detachRenderObject (package:flutter/src/widgets/framework.dart:4201:5)
#11 Element.deactivateChild (package:flutter/src/widgets/framework.dart:4376:11)
#12 Element.updateChild (package:flutter/src/widgets/framework.dart:3835:9)
#13 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5505:16)
#14 Element.rebuild (package:flutter/src/widgets/framework.dart:5196:7)
#15 BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:2904:19)
#16 WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:989:21)
#17 RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:448:5)
#18 SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1386:15)
#19 SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1311:9)
#20 SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:1169:5)
#21 _invoke (dart:ui/hooks.dart:312:13)
#22 PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:399:5)
#23 _drawFrame (dart:ui/hooks.dart:283:31)
(elided 2 frames from class _AssertionError)
====================================================================================================
Flutter Doctor output
Doctor output
flutter doctor -v
[✓] Flutter (Channel stable, 3.19.6, on macOS 14.4.1 23E224 darwin-x64, locale en-AU)
• Flutter version 3.19.6 on channel stable at /Applications/flutter
• Upstream repository https://github.com/flutter/flutter.git
• Framework revision 54e66469a9 (9 days ago), 2024-04-17 13:08:03 -0700
• Engine revision c4cd48e186
• Dart version 3.3.4
• DevTools version 2.31.1
[✓] Android toolchain - develop for Android devices (Android SDK version 32.1.0-rc1)
• Android SDK at /Users/shady/Library/Android/sdk
• Platform android-33, build-tools 32.1.0-rc1
• Java binary at: /Applications/Android Studio.app/Contents/jre/Contents/Home/bin/java
• Java version OpenJDK Runtime Environment (build 11.0.11+0-b60-7590822)
• All Android licenses accepted.
[✓] Xcode - develop for iOS and macOS (Xcode 15.2)
• Xcode at /Applications/Xcode.app/Contents/Developer
• Build 15C500b
• CocoaPods version 1.15.2
[✓] Chrome - develop for the web
• Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome
[✓] Android Studio (version 2021.1)
• Android Studio at /Applications/Android Studio.app/Contents
• Flutter plugin can be installed from:
🔨 https://plugins.jetbrains.com/plugin/9212-flutter
• Dart plugin can be installed from:
🔨 https://plugins.jetbrains.com/plugin/6351-dart
• Java version OpenJDK Runtime Environment (build 11.0.11+0-b60-7590822)
[✓] IntelliJ IDEA Ultimate Edition (version 2024.1)
• IntelliJ at /Users/shady/Applications/IntelliJ IDEA Ultimate.app
• Flutter plugin version 79.0.3
• Dart plugin version 241.15845
[✓] VS Code (version 1.88.1)
• VS Code at /Applications/Visual Studio Code.app/Contents
• Flutter extension can be installed from:
🔨 https://marketplace.visualstudio.com/items?itemName=Dart-Code.flutter
[✓] VS Code (version 1.86.0-insider)
• VS Code at /Applications/Visual Studio Code - Insiders.app/Contents
• Flutter extension can be installed from:
🔨 https://marketplace.visualstudio.com/items?itemName=Dart-Code.flutter
[✓] Connected device (4 available)
• Shady’s Shenanigans (mobile) • 00008110-001129523C09801E • ios • iOS 17.4.1 21E236
• iPad Pro (12.9-inch) (6th generation) (mobile) • 71A2390D-33E0-40A6-965A-17475C5A5527 • ios • com.apple.CoreSimulator.SimRuntime.iOS-17-2 (simulator)
• macOS (desktop) • macos • darwin-x64 • macOS 14.4.1 23E224 darwin-x64
• Chrome (web) • chrome • web-javascript • Google Chrome 124.0.6367.91
[✓] Network resources
• All expected network resources are available.
• No issues found!
@premiumbiscuit You are using flutter_bloc which is community package. In order to properly address the issue, please narrow down the code sample to minimal but complete and without community package implementation, that still triggers the reported exception.
Thanks @darshankawar for looking into this. I have replaced flutter_bloc with a StreamController, please see the code below. Ultimately, anything that causes re-rendering will produce the bug for some reason.
Code sample
import 'dart:async';
import 'package:flutter/material.dart';
import 'package:go_router/go_router.dart';
final GlobalKey<NavigatorState> _rootNavigatorKey =
GlobalKey<NavigatorState>(debugLabel: 'root');
final GlobalKey<NavigatorState> _sectionANavigatorKey =
GlobalKey<NavigatorState>(debugLabel: 'sectionANav');
class CounterStream {
final _stateController = StreamController<int>.broadcast();
int _counter = 0;
Stream<int> get stateStream => _stateController.stream.asBroadcastStream();
void increment() {
_stateController.sink.add(++_counter);
}
void dispose() {
_stateController.close();
}
}
final CounterStream counterStream = CounterStream();
void main() {
runApp(NestedTabNavigationExampleApp());
}
/// An example demonstrating how to use nested navigators
class NestedTabNavigationExampleApp extends StatelessWidget {
/// Creates a NestedTabNavigationExampleApp
NestedTabNavigationExampleApp({super.key});
final GoRouter _router = GoRouter(
navigatorKey: _rootNavigatorKey,
initialLocation: '/a/details',
routes: <RouteBase>[
StatefulShellRoute.indexedStack(
builder: (BuildContext context, GoRouterState state,
StatefulNavigationShell navigationShell) {
// Return the widget that implements the custom shell (in this case
// using a BottomNavigationBar). The StatefulNavigationShell is passed
// to be able access the state of the shell and to navigate to other
// branches in a stateful way.
return ScaffoldWithNavBar(navigationShell: navigationShell);
},
branches: <StatefulShellBranch>[
// The route branch for the first tab of the bottom navigation bar.
StatefulShellBranch(
navigatorKey: _sectionANavigatorKey,
routes: <RouteBase>[
GoRoute(
// The screen to display as the root in the first tab of the
// bottom navigation bar.
path: '/a',
builder: (BuildContext context, GoRouterState state) =>
const RootScreen(label: 'A', detailsPath: '/a/details'),
routes: <RouteBase>[
// The details screen to display stacked on navigator of the
// first tab. This will cover screen A but not the application
// shell (bottom navigation bar).
GoRoute(
path: 'details',
builder: (BuildContext context, GoRouterState state) =>
const DetailsScreen(label: 'A'),
),
],
),
],
),
],
),
],
);
@override
Widget build(BuildContext context) {
return MaterialApp.router(
title: 'Flutter Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
),
routerConfig: _router,
);
}
}
/// Builds the "shell" for the app by building a Scaffold with a
/// BottomNavigationBar, where [child] is placed in the body of the Scaffold.
class ScaffoldWithNavBar extends StatefulWidget {
/// Constructs an [ScaffoldWithNavBar].
const ScaffoldWithNavBar({
required this.navigationShell,
Key? key,
}) : super(key: key ?? const ValueKey<String>('ScaffoldWithNavBar'));
/// The navigation shell and container for the branch Navigators.
final StatefulNavigationShell navigationShell;
@override
State<ScaffoldWithNavBar> createState() => _ScaffoldWithNavBarState();
}
class _ScaffoldWithNavBarState extends State<ScaffoldWithNavBar> {
late StreamSubscription<int> _stateSubscription;
int _currentState = 0;
@override
void initState() {
super.initState();
_stateSubscription = counterStream.stateStream.listen((state) {
setState(() {
_currentState = state;
});
});
}
@override
void dispose() {
_stateSubscription.cancel();
super.dispose();
}
@override
Widget build(BuildContext context) {
return LayoutBuilder(
builder: (BuildContext context, BoxConstraints constraint) {
double width = constraint.maxWidth;
final Widget narrowContent = ConstrainedBox(
constraints: BoxConstraints(
minHeight: MediaQuery.of(context).size.height,
),
child: widget.navigationShell,
);
late final Widget body;
if (_currentState.isEven) {
body = Stack(children: [
Positioned.fill(child: narrowContent),
]);
} else {
body = Column(children: [Expanded(child: narrowContent)]);
}
final Widget rightArea = SafeArea(
// key: const Key('right_area'),
child: Align(
alignment: Alignment.center,
child: ConstrainedBox(
constraints: const BoxConstraints(
maxWidth: 800,
),
child: body,
),
),
);
return Scaffold(
body: rightArea,
bottomNavigationBar: BottomNavigationBar(
// Here, the items of BottomNavigationBar are hard coded. In a real
// world scenario, the items would most likely be generated from the
// branches of the shell route, which can be fetched using
// `navigationShell.route.branches`.
items: const <BottomNavigationBarItem>[
BottomNavigationBarItem(
icon: Icon(Icons.home), label: 'Section A'),
BottomNavigationBarItem(
icon: Icon(Icons.work), label: 'Section B'),
BottomNavigationBarItem(
icon: Icon(Icons.tab), label: 'Section C'),
],
currentIndex: widget.navigationShell.currentIndex,
onTap: (int index) => _onTap(context, index),
),
);
},
);
}
/// Navigate to the current location of the branch at the provided index when
/// tapping an item in the BottomNavigationBar.
void _onTap(BuildContext context, int index) {
// When navigating to a new branch, it's recommended to use the goBranch
// method, as doing so makes sure the last navigation state of the
// Navigator for the branch is restored.
widget.navigationShell.goBranch(
index,
// A common pattern when using bottom navigation bars is to support
// navigating to the initial location when tapping the item that is
// already active. This example demonstrates how to support this behavior,
// using the initialLocation parameter of goBranch.
initialLocation: index == widget.navigationShell.currentIndex,
);
}
}
/// Widget for the root/initial pages in the bottom navigation bar.
class RootScreen extends StatefulWidget {
/// Creates a RootScreen
const RootScreen({
required this.label,
required this.detailsPath,
this.secondDetailsPath,
super.key,
});
/// The label
final String label;
/// The path to the detail page
final String detailsPath;
/// The path to another detail page
final String? secondDetailsPath;
@override
State<RootScreen> createState() => _RootScreenState();
}
class _RootScreenState extends State<RootScreen> {
late StreamSubscription<int> _stateSubscription;
int _currentState = 0;
@override
void initState() {
super.initState();
_stateSubscription = counterStream.stateStream.listen((state) {
setState(() {
_currentState = state;
});
});
}
@override
void dispose() {
_stateSubscription.cancel();
super.dispose();
}
@override
Widget build(BuildContext context) {
if (_currentState.isEven) {
return Scaffold(body: const CircularProgressIndicator());
} else {
return Text('Screen ${widget.label}',
style: Theme.of(context).textTheme.titleLarge);
}
}
}
/// The details screen for either the A or B screen.
class DetailsScreen extends StatefulWidget {
/// Constructs a [DetailsScreen].
const DetailsScreen({
required this.label,
this.param,
this.extra,
this.withScaffold = true,
super.key,
});
/// The label to display in the center of the screen.
final String label;
/// Optional param
final String? param;
/// Optional extra object
final Object? extra;
/// Wrap in scaffold
final bool withScaffold;
@override
State<StatefulWidget> createState() => DetailsScreenState();
}
/// The state for DetailsScreen
class DetailsScreenState extends State<DetailsScreen> {
late StreamSubscription<int> _stateSubscription;
int _currentCount = 0;
@override
void initState() {
super.initState();
_stateSubscription = counterStream.stateStream.listen((state) {
setState(() {
_currentCount = state;
});
});
}
@override
void dispose() {
_stateSubscription.cancel();
super.dispose();
}
@override
Widget build(BuildContext context) {
if (widget.withScaffold) {
return Scaffold(
appBar: AppBar(
title: Text('Details Screen - ${widget.label}'),
),
body: _build(context),
);
} else {
return ColoredBox(
color: Theme.of(context).scaffoldBackgroundColor,
child: _build(context),
);
}
}
Widget _build(BuildContext context) {
return Center(
child: Column(
mainAxisSize: MainAxisSize.min,
children: <Widget>[
Text('Details for ${widget.label} - Counter: ${_currentCount}',
style: Theme.of(context).textTheme.titleLarge),
const Padding(padding: EdgeInsets.all(4)),
TextButton(
onPressed: () {
setState(() {
counterStream.increment();
});
},
child: const Text('Crash me!'),
),
const Padding(padding: EdgeInsets.all(8)),
if (widget.param != null)
Text('Parameter: ${widget.param!}',
style: Theme.of(context).textTheme.titleMedium),
const Padding(padding: EdgeInsets.all(8)),
if (widget.extra != null)
Text('Extra: ${widget.extra!}',
style: Theme.of(context).textTheme.titleMedium),
if (!widget.withScaffold) ...<Widget>[
const Padding(padding: EdgeInsets.all(16)),
TextButton(
onPressed: () {
GoRouter.of(context).pop();
},
child: const Text('< Back',
style: TextStyle(fontWeight: FontWeight.bold, fontSize: 18)),
),
]
],
),
);
}
}
Thanks for the update. Using above code sample, it throws below error log in the console:
error log
======== Exception caught by widgets library =======================================================
The following assertion was thrown building RootScreen(dependencies: [_InheritedTheme, _LocalizationsScope-[GlobalKey#ca008]], state: _RootScreenState#b7568):
'package:flutter/src/rendering/object.dart': Failed assertion: line 2283 pos 14: '_debugSubtreeRelayoutRootAlreadyMarkedNeedsLayout()': is not true.
Either the assertion indicates an error in the framework itself, or we should provide substantially more information in this error message to help you determine and fix the underlying cause.
In either case, please report this assertion by filing a bug on GitHub:
https://github.com/flutter/flutter/issues/new?template=2_bug.yml
The relevant error-causing widget was:
RootScreen RootScreen:file:///Users/dhs/Documents/NCFlutter/app_foo_stable/lib/main.dart:61:23
When the exception was thrown, this was the stack:
#2 RenderObject.markNeedsLayout (package:flutter/src/rendering/object.dart:2283:14)
#3 RenderBox.markNeedsLayout (package:flutter/src/rendering/box.dart:2379:11)
#4 RenderObject.dropChild (package:flutter/src/rendering/object.dart:1863:5)
#5 RenderObjectWithChildMixin.child= (package:flutter/src/rendering/object.dart:4051:7)
#6 SingleChildRenderObjectElement.removeRenderObjectChild (package:flutter/src/widgets/framework.dart:6787:18)
#7 RenderObjectElement.detachRenderObject (package:flutter/src/widgets/framework.dart:6601:37)
#8 Element.detachRenderObject.<anonymous closure> (package:flutter/src/widgets/framework.dart:4202:13)
#9 ComponentElement.visitChildren (package:flutter/src/widgets/framework.dart:5532:14)
#10 Element.detachRenderObject (package:flutter/src/widgets/framework.dart:4201:5)
#11 Element.deactivateChild (package:flutter/src/widgets/framework.dart:4376:11)
#12 Element.updateChild (package:flutter/src/widgets/framework.dart:3835:9)
#13 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5505:16)
#14 StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5643:11)
#15 Element.rebuild (package:flutter/src/widgets/framework.dart:5196:7)
#16 BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:2904:19)
#17 WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:989:21)
#18 RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:448:5)
#19 SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1386:15)
#20 SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1311:9)
#21 SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:1169:5)
#22 _invoke (dart:ui/hooks.dart:312:13)
#23 PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:399:5)
#24 _drawFrame (dart:ui/hooks.dart:283:31)
(elided 2 frames from class _AssertionError)
====================================================================================================
======== Exception caught by widgets library =======================================================
The following assertion was thrown while rebuilding dirty elements:
'package:flutter/src/rendering/object.dart': Failed assertion: line 1853 pos 12: 'child._parent == this': is not true.
Either the assertion indicates an error in the framework itself, or we should provide substantially more information in this error message to help you determine and fix the underlying cause.
In either case, please report this assertion by filing a bug on GitHub:
https://github.com/flutter/flutter/issues/new?template=2_bug.yml
The relevant error-causing widget was:
RootScreen RootScreen:file:///Users/dhs/Documents/NCFlutter/app_foo_stable/lib/main.dart:61:23
When the exception was thrown, this was the stack:
#2 RenderObject.dropChild (package:flutter/src/rendering/object.dart:1853:12)
#3 RenderObjectWithChildMixin.child= (package:flutter/src/rendering/object.dart:4051:7)
#4 SingleChildRenderObjectElement.insertRenderObjectChild (package:flutter/src/widgets/framework.dart:6773:18)
#5 RenderObjectElement.attachRenderObject (package:flutter/src/widgets/framework.dart:6591:35)
#6 RenderObjectElement.mount (package:flutter/src/widgets/framework.dart:6458:5)
#7 Element.inflateWidget (package:flutter/src/widgets/framework.dart:4335:16)
#8 Element.updateChild (package:flutter/src/widgets/framework.dart:3846:18)
#9 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5519:16)
#10 StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5643:11)
#11 Element.rebuild (package:flutter/src/widgets/framework.dart:5196:7)
#12 BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:2904:19)
#13 WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:989:21)
#14 RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:448:5)
#15 SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1386:15)
#16 SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1311:9)
#17 SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:1169:5)
#18 _invoke (dart:ui/hooks.dart:312:13)
#19 PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:399:5)
#20 _drawFrame (dart:ui/hooks.dart:283:31)
(elided 2 frames from class _AssertionError)
The element being rebuilt at the time was index 2 of 5: RootScreen
dependencies: [_InheritedTheme, _LocalizationsScope-[GlobalKey#ca008]]
state: _RootScreenState#b7568
====================================================================================================
======== Exception caught by widgets library =======================================================
The following assertion was thrown building MediaQuery(MediaQueryData(size: Size(411.4, 707.4), devicePixelRatio: 3.5, textScaler: no scaling, platformBrightness: Brightness.light, padding: EdgeInsets.zero, viewPadding: EdgeInsets.zero, viewInsets: EdgeInsets.zero, systemGestureInsets: EdgeInsets(30.0, 24.0, 30.0, 8.0), alwaysUse24HourFormat: false, accessibleNavigation: false, highContrast: false, onOffSwitchLabels: false, disableAnimations: false, invertColors: false, boldText: false, navigationMode: traditional, gestureSettings: DeviceGestureSettings(touchSlop: 8.0), displayFeatures: [])):
'package:flutter/src/rendering/object.dart': Failed assertion: line 2164 pos 12: '_owner != null': is not true.
Either the assertion indicates an error in the framework itself, or we should provide substantially more information in this error message to help you determine and fix the underlying cause.
In either case, please report this assertion by filing a bug on GitHub:
https://github.com/flutter/flutter/issues/new?template=2_bug.yml
The relevant error-causing widget was:
SafeArea SafeArea:file:///Users/dhs/Documents/NCFlutter/app_foo_stable/lib/main.dart:150:34
When the exception was thrown, this was the stack:
#2 RenderObject.detach (package:flutter/src/rendering/object.dart:2164:12)
#3 ContainerRenderObjectMixin.detach (package:flutter/src/rendering/object.dart:4349:11)
#4 RelayoutWhenSystemFontsChangeMixin.detach (package:flutter/src/rendering/object.dart:4482:11)
#5 RenderObjectWithChildMixin.detach (package:flutter/src/rendering/object.dart:4068:13)
#6 RenderObjectWithChildMixin.detach (package:flutter/src/rendering/object.dart:4068:13)
#7 RenderObjectWithChildMixin.detach (package:flutter/src/rendering/object.dart:4068:13)
#8 RenderObjectWithChildMixin.detach (package:flutter/src/rendering/object.dart:4068:13)
#9 _RenderSnapshotWidget.detach (package:flutter/src/widgets/snapshot_widget.dart:277:11)
#10 RenderObjectWithChildMixin.detach (package:flutter/src/rendering/object.dart:4068:13)
#11 _RenderSnapshotWidget.detach (package:flutter/src/widgets/snapshot_widget.dart:277:11)
#12 RenderObjectWithChildMixin.detach (package:flutter/src/rendering/object.dart:4068:13)
#13 _RenderSnapshotWidget.detach (package:flutter/src/widgets/snapshot_widget.dart:277:11)
#14 RenderObjectWithChildMixin.detach (package:flutter/src/rendering/object.dart:4068:13)
#15 _RenderSnapshotWidget.detach (package:flutter/src/widgets/snapshot_widget.dart:277:11)
#16 RenderObjectWithChildMixin.detach (package:flutter/src/rendering/object.dart:4068:13)
#17 RenderObjectWithChildMixin.detach (package:flutter/src/rendering/object.dart:4068:13)
#18 RenderObjectWithChildMixin.detach (package:flutter/src/rendering/object.dart:4068:13)
#19 RenderObjectWithChildMixin.detach (package:flutter/src/rendering/object.dart:4068:13)
#20 ContainerRenderObjectMixin.detach (package:flutter/src/rendering/object.dart:4352:13)
#21 _RenderTheater.detach (package:flutter/src/widgets/overlay.dart:1070:11)
#22 RenderObjectWithChildMixin.detach (package:flutter/src/rendering/object.dart:4068:13)
#23 RenderObjectWithChildMixin.detach (package:flutter/src/rendering/object.dart:4068:13)
#24 RenderObjectWithChildMixin.detach (package:flutter/src/rendering/object.dart:4068:13)
#25 RenderObjectWithChildMixin.detach (package:flutter/src/rendering/object.dart:4068:13)
#26 RenderObjectWithChildMixin.detach (package:flutter/src/rendering/object.dart:4068:13)
#27 ContainerRenderObjectMixin.detach (package:flutter/src/rendering/object.dart:4352:13)
#28 RenderObjectWithChildMixin.detach (package:flutter/src/rendering/object.dart:4068:13)
#29 ContainerRenderObjectMixin.detach (package:flutter/src/rendering/object.dart:4352:13)
#30 RenderObject.dropChild (package:flutter/src/rendering/object.dart:1861:13)
#31 RenderObjectWithChildMixin.child= (package:flutter/src/rendering/object.dart:4051:7)
#32 SingleChildRenderObjectElement.removeRenderObjectChild (package:flutter/src/widgets/framework.dart:6787:18)
#33 RenderObjectElement.detachRenderObject (package:flutter/src/widgets/framework.dart:6601:37)
#34 Element.deactivateChild (package:flutter/src/widgets/framework.dart:4376:11)
#35 Element.updateChild (package:flutter/src/widgets/framework.dart:3835:9)
#36 SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:6765:14)
#37 Element.updateChild (package:flutter/src/widgets/framework.dart:3824:15)
#38 SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:6765:14)
#39 Element.updateChild (package:flutter/src/widgets/framework.dart:3824:15)
#40 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5505:16)
#41 Element.rebuild (package:flutter/src/widgets/framework.dart:5196:7)
#42 ProxyElement.update (package:flutter/src/widgets/framework.dart:5809:5)
#43 Element.updateChild (package:flutter/src/widgets/framework.dart:3824:15)
#44 SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:6765:14)
#45 Element.updateChild (package:flutter/src/widgets/framework.dart:3824:15)
#46 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5505:16)
#47 Element.rebuild (package:flutter/src/widgets/framework.dart:5196:7)
#48 StatelessElement.update (package:flutter/src/widgets/framework.dart:5556:5)
#49 Element.updateChild (package:flutter/src/widgets/framework.dart:3824:15)
#50 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5505:16)
#51 Element.rebuild (package:flutter/src/widgets/framework.dart:5196:7)
#52 StatelessElement.update (package:flutter/src/widgets/framework.dart:5556:5)
#53 Element.updateChild (package:flutter/src/widgets/framework.dart:3824:15)
#54 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5505:16)
#55 Element.rebuild (package:flutter/src/widgets/framework.dart:5196:7)
#56 StatelessElement.update (package:flutter/src/widgets/framework.dart:5556:5)
#57 Element.updateChild (package:flutter/src/widgets/framework.dart:3824:15)
#58 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5505:16)
#59 Element.rebuild (package:flutter/src/widgets/framework.dart:5196:7)
#60 ProxyElement.update (package:flutter/src/widgets/framework.dart:5809:5)
#61 Element.updateChild (package:flutter/src/widgets/framework.dart:3824:15)
#62 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5505:16)
#63 Element.rebuild (package:flutter/src/widgets/framework.dart:5196:7)
#64 ProxyElement.update (package:flutter/src/widgets/framework.dart:5809:5)
#65 Element.updateChild (package:flutter/src/widgets/framework.dart:3824:15)
#66 Element.updateChildren (package:flutter/src/widgets/framework.dart:3973:32)
#67 MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:6918:17)
#68 Element.updateChild (package:flutter/src/widgets/framework.dart:3824:15)
#69 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5505:16)
#70 Element.rebuild (package:flutter/src/widgets/framework.dart:5196:7)
#71 ProxyElement.update (package:flutter/src/widgets/framework.dart:5809:5)
#72 Element.updateChild (package:flutter/src/widgets/framework.dart:3824:15)
#73 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5505:16)
#74 StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5643:11)
#75 Element.rebuild (package:flutter/src/widgets/framework.dart:5196:7)
#76 StatefulElement.update (package:flutter/src/widgets/framework.dart:5666:5)
#77 Element.updateChild (package:flutter/src/widgets/framework.dart:3824:15)
#78 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5505:16)
#79 StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5643:11)
#80 Element.rebuild (package:flutter/src/widgets/framework.dart:5196:7)
#81 StatefulElement.update (package:flutter/src/widgets/framework.dart:5666:5)
#82 Element.updateChild (package:flutter/src/widgets/framework.dart:3824:15)
#83 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5505:16)
#84 Element.rebuild (package:flutter/src/widgets/framework.dart:5196:7)
#85 ProxyElement.update (package:flutter/src/widgets/framework.dart:5809:5)
#86 Element.updateChild (package:flutter/src/widgets/framework.dart:3824:15)
#87 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5505:16)
#88 StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5643:11)
#89 Element.rebuild (package:flutter/src/widgets/framework.dart:5196:7)
#90 StatefulElement.update (package:flutter/src/widgets/framework.dart:5666:5)
#91 Element.updateChild (package:flutter/src/widgets/framework.dart:3824:15)
#92 SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:6765:14)
#93 Element.updateChild (package:flutter/src/widgets/framework.dart:3824:15)
#94 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5505:16)
#95 Element.rebuild (package:flutter/src/widgets/framework.dart:5196:7)
#96 ProxyElement.update (package:flutter/src/widgets/framework.dart:5809:5)
#97 Element.updateChild (package:flutter/src/widgets/framework.dart:3824:15)
#98 SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:6765:14)
#99 Element.updateChild (package:flutter/src/widgets/framework.dart:3824:15)
#100 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5505:16)
#101 StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5643:11)
#102 Element.rebuild (package:flutter/src/widgets/framework.dart:5196:7)
#103 StatefulElement.update (package:flutter/src/widgets/framework.dart:5666:5)
#104 Element.updateChild (package:flutter/src/widgets/framework.dart:3824:15)
#105 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5505:16)
#106 StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5643:11)
#107 Element.rebuild (package:flutter/src/widgets/framework.dart:5196:7)
#108 StatefulElement.update (package:flutter/src/widgets/framework.dart:5666:5)
#109 Element.updateChild (package:flutter/src/widgets/framework.dart:3824:15)
#110 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5505:16)
#111 Element.rebuild (package:flutter/src/widgets/framework.dart:5196:7)
#112 ProxyElement.update (package:flutter/src/widgets/framework.dart:5809:5)
#113 Element.updateChild (package:flutter/src/widgets/framework.dart:3824:15)
#114 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5505:16)
#115 Element.rebuild (package:flutter/src/widgets/framework.dart:5196:7)
#116 ProxyElement.update (package:flutter/src/widgets/framework.dart:5809:5)
#117 Element.updateChild (package:flutter/src/widgets/framework.dart:3824:15)
#118 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5505:16)
#119 Element.rebuild (package:flutter/src/widgets/framework.dart:5196:7)
#120 ProxyElement.update (package:flutter/src/widgets/framework.dart:5809:5)
#121 Element.updateChild (package:flutter/src/widgets/framework.dart:3824:15)
#122 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5505:16)
#123 StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5643:11)
#124 Element.rebuild (package:flutter/src/widgets/framework.dart:5196:7)
#125 StatefulElement.update (package:flutter/src/widgets/framework.dart:5666:5)
#126 Element.updateChild (package:flutter/src/widgets/framework.dart:3824:15)
#127 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5505:16)
#128 Element.rebuild (package:flutter/src/widgets/framework.dart:5196:7)
#129 ProxyElement.update (package:flutter/src/widgets/framework.dart:5809:5)
#130 Element.updateChild (package:flutter/src/widgets/framework.dart:3824:15)
#131 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5505:16)
#132 StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5643:11)
#133 Element.rebuild (package:flutter/src/widgets/framework.dart:5196:7)
#134 StatefulElement.update (package:flutter/src/widgets/framework.dart:5666:5)
#135 Element.updateChild (package:flutter/src/widgets/framework.dart:3824:15)
#136 _LayoutBuilderElement._layout.layoutCallback (package:flutter/src/widgets/layout_builder.dart:155:18)
#137 BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:2844:19)
#138 _LayoutBuilderElement._layout (package:flutter/src/widgets/layout_builder.dart:173:12)
#139 RenderObject.invokeLayoutCallback.<anonymous closure> (package:flutter/src/rendering/object.dart:2686:59)
#140 PipelineOwner._enableMutationsToDirtySubtrees (package:flutter/src/rendering/object.dart:1097:15)
#141 RenderObject.invokeLayoutCallback (package:flutter/src/rendering/object.dart:2686:14)
#142 RenderConstrainedLayoutBuilder.rebuildIfNecessary (package:flutter/src/widgets/layout_builder.dart:248:7)
#143 _RenderLayoutBuilder.performLayout (package:flutter/src/widgets/layout_builder.dart:331:5)
#144 RenderObject._layoutWithoutResize (package:flutter/src/rendering/object.dart:2414:7)
#145 PipelineOwner.flushLayout (package:flutter/src/rendering/object.dart:1051:18)
#146 PipelineOwner.flushLayout (package:flutter/src/rendering/object.dart:1064:15)
#147 RendererBinding.drawFrame (package:flutter/src/rendering/binding.dart:582:23)
#148 WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:991:13)
#149 RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:448:5)
#150 SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1386:15)
#151 SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1311:9)
#152 SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:1169:5)
#153 _invoke (dart:ui/hooks.dart:312:13)
#154 PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:399:5)
#155 _drawFrame (dart:ui/hooks.dart:283:31)
(elided 2 frames from class _AssertionError)
====================================================================================================
======== Exception caught by widgets library =======================================================
The following assertion was thrown building SafeArea(avoid left padding, avoid top padding, avoid right padding, avoid bottom padding, dependencies: [MediaQuery]):
'package:flutter/src/rendering/object.dart': Failed assertion: line 2164 pos 12: '_owner != null': is not true.
Either the assertion indicates an error in the framework itself, or we should provide substantially more information in this error message to help you determine and fix the underlying cause.
In either case, please report this assertion by filing a bug on GitHub:
https://github.com/flutter/flutter/issues/new?template=2_bug.yml
The relevant error-causing widget was:
SafeArea SafeArea:file:///Users/dhs/Documents/NCFlutter/app_foo_stable/lib/main.dart:150:34
When the exception was thrown, this was the stack:
#2 RenderObject.detach (package:flutter/src/rendering/object.dart:2164:12)
#3 ContainerRenderObjectMixin.detach (package:flutter/src/rendering/object.dart:4349:11)
#4 RenderObjectWithChildMixin.detach (package:flutter/src/rendering/object.dart:4068:13)
#5 RenderObjectWithChildMixin.detach (package:flutter/src/rendering/object.dart:4068:13)
#6 RenderObject.dropChild (package:flutter/src/rendering/object.dart:1861:13)
#7 RenderObjectWithChildMixin.child= (package:flutter/src/rendering/object.dart:4051:7)
#8 SingleChildRenderObjectElement.insertRenderObjectChild (package:flutter/src/widgets/framework.dart:6773:18)
#9 RenderObjectElement.attachRenderObject (package:flutter/src/widgets/framework.dart:6591:35)
#10 RenderObjectElement.mount (package:flutter/src/widgets/framework.dart:6458:5)
#11 Element.inflateWidget (package:flutter/src/widgets/framework.dart:4335:16)
#12 Element.updateChild (package:flutter/src/widgets/framework.dart:3846:18)
#13 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5519:16)
#14 Element.rebuild (package:flutter/src/widgets/framework.dart:5196:7)
#15 ProxyElement.update (package:flutter/src/widgets/framework.dart:5809:5)
#16 Element.updateChild (package:flutter/src/widgets/framework.dart:3824:15)
#17 SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:6765:14)
#18 Element.updateChild (package:flutter/src/widgets/framework.dart:3824:15)
#19 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5505:16)
#20 Element.rebuild (package:flutter/src/widgets/framework.dart:5196:7)
#21 StatelessElement.update (package:flutter/src/widgets/framework.dart:5556:5)
#22 Element.updateChild (package:flutter/src/widgets/framework.dart:3824:15)
#23 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5505:16)
#24 Element.rebuild (package:flutter/src/widgets/framework.dart:5196:7)
#25 StatelessElement.update (package:flutter/src/widgets/framework.dart:5556:5)
#26 Element.updateChild (package:flutter/src/widgets/framework.dart:3824:15)
#27 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5505:16)
#28 Element.rebuild (package:flutter/src/widgets/framework.dart:5196:7)
#29 StatelessElement.update (package:flutter/src/widgets/framework.dart:5556:5)
#30 Element.updateChild (package:flutter/src/widgets/framework.dart:3824:15)
#31 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5505:16)
#32 Element.rebuild (package:flutter/src/widgets/framework.dart:5196:7)
#33 ProxyElement.update (package:flutter/src/widgets/framework.dart:5809:5)
#34 Element.updateChild (package:flutter/src/widgets/framework.dart:3824:15)
#35 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5505:16)
#36 Element.rebuild (package:flutter/src/widgets/framework.dart:5196:7)
#37 ProxyElement.update (package:flutter/src/widgets/framework.dart:5809:5)
#38 Element.updateChild (package:flutter/src/widgets/framework.dart:3824:15)
#39 Element.updateChildren (package:flutter/src/widgets/framework.dart:3973:32)
#40 MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:6918:17)
#41 Element.updateChild (package:flutter/src/widgets/framework.dart:3824:15)
#42 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5505:16)
#43 Element.rebuild (package:flutter/src/widgets/framework.dart:5196:7)
#44 ProxyElement.update (package:flutter/src/widgets/framework.dart:5809:5)
#45 Element.updateChild (package:flutter/src/widgets/framework.dart:3824:15)
#46 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5505:16)
#47 StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5643:11)
#48 Element.rebuild (package:flutter/src/widgets/framework.dart:5196:7)
#49 StatefulElement.update (package:flutter/src/widgets/framework.dart:5666:5)
#50 Element.updateChild (package:flutter/src/widgets/framework.dart:3824:15)
#51 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5505:16)
#52 StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5643:11)
#53 Element.rebuild (package:flutter/src/widgets/framework.dart:5196:7)
#54 StatefulElement.update (package:flutter/src/widgets/framework.dart:5666:5)
#55 Element.updateChild (package:flutter/src/widgets/framework.dart:3824:15)
#56 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5505:16)
#57 Element.rebuild (package:flutter/src/widgets/framework.dart:5196:7)
#58 ProxyElement.update (package:flutter/src/widgets/framework.dart:5809:5)
#59 Element.updateChild (package:flutter/src/widgets/framework.dart:3824:15)
#60 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5505:16)
#61 StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5643:11)
#62 Element.rebuild (package:flutter/src/widgets/framework.dart:5196:7)
#63 StatefulElement.update (package:flutter/src/widgets/framework.dart:5666:5)
#64 Element.updateChild (package:flutter/src/widgets/framework.dart:3824:15)
#65 SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:6765:14)
#66 Element.updateChild (package:flutter/src/widgets/framework.dart:3824:15)
#67 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5505:16)
#68 Element.rebuild (package:flutter/src/widgets/framework.dart:5196:7)
#69 ProxyElement.update (package:flutter/src/widgets/framework.dart:5809:5)
#70 Element.updateChild (package:flutter/src/widgets/framework.dart:3824:15)
#71 SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:6765:14)
#72 Element.updateChild (package:flutter/src/widgets/framework.dart:3824:15)
#73 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5505:16)
#74 StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5643:11)
#75 Element.rebuild (package:flutter/src/widgets/framework.dart:5196:7)
#76 StatefulElement.update (package:flutter/src/widgets/framework.dart:5666:5)
#77 Element.updateChild (package:flutter/src/widgets/framework.dart:3824:15)
#78 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5505:16)
#79 StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5643:11)
#80 Element.rebuild (package:flutter/src/widgets/framework.dart:5196:7)
#81 StatefulElement.update (package:flutter/src/widgets/framework.dart:5666:5)
#82 Element.updateChild (package:flutter/src/widgets/framework.dart:3824:15)
#83 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5505:16)
#84 Element.rebuild (package:flutter/src/widgets/framework.dart:5196:7)
#85 ProxyElement.update (package:flutter/src/widgets/framework.dart:5809:5)
#86 Element.updateChild (package:flutter/src/widgets/framework.dart:3824:15)
#87 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5505:16)
#88 Element.rebuild (package:flutter/src/widgets/framework.dart:5196:7)
#89 ProxyElement.update (package:flutter/src/widgets/framework.dart:5809:5)
#90 Element.updateChild (package:flutter/src/widgets/framework.dart:3824:15)
#91 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5505:16)
#92 Element.rebuild (package:flutter/src/widgets/framework.dart:5196:7)
#93 ProxyElement.update (package:flutter/src/widgets/framework.dart:5809:5)
#94 Element.updateChild (package:flutter/src/widgets/framework.dart:3824:15)
#95 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5505:16)
#96 StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5643:11)
#97 Element.rebuild (package:flutter/src/widgets/framework.dart:5196:7)
#98 StatefulElement.update (package:flutter/src/widgets/framework.dart:5666:5)
#99 Element.updateChild (package:flutter/src/widgets/framework.dart:3824:15)
#100 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5505:16)
#101 Element.rebuild (package:flutter/src/widgets/framework.dart:5196:7)
#102 ProxyElement.update (package:flutter/src/widgets/framework.dart:5809:5)
#103 Element.updateChild (package:flutter/src/widgets/framework.dart:3824:15)
#104 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5505:16)
#105 StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5643:11)
#106 Element.rebuild (package:flutter/src/widgets/framework.dart:5196:7)
#107 StatefulElement.update (package:flutter/src/widgets/framework.dart:5666:5)
#108 Element.updateChild (package:flutter/src/widgets/framework.dart:3824:15)
#109 _LayoutBuilderElement._layout.layoutCallback (package:flutter/src/widgets/layout_builder.dart:155:18)
#110 BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:2844:19)
#111 _LayoutBuilderElement._layout (package:flutter/src/widgets/layout_builder.dart:173:12)
#112 RenderObject.invokeLayoutCallback.<anonymous closure> (package:flutter/src/rendering/object.dart:2686:59)
#113 PipelineOwner._enableMutationsToDirtySubtrees (package:flutter/src/rendering/object.dart:1097:15)
#114 RenderObject.invokeLayoutCallback (package:flutter/src/rendering/object.dart:2686:14)
#115 RenderConstrainedLayoutBuilder.rebuildIfNecessary (package:flutter/src/widgets/layout_builder.dart:248:7)
#116 _RenderLayoutBuilder.performLayout (package:flutter/src/widgets/layout_builder.dart:331:5)
#117 RenderObject._layoutWithoutResize (package:flutter/src/rendering/object.dart:2414:7)
#118 PipelineOwner.flushLayout (package:flutter/src/rendering/object.dart:1051:18)
#119 PipelineOwner.flushLayout (package:flutter/src/rendering/object.dart:1064:15)
#120 RendererBinding.drawFrame (package:flutter/src/rendering/binding.dart:582:23)
#121 WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:991:13)
#122 RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:448:5)
#123 SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1386:15)
#124 SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1311:9)
#125 SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:1169:5)
#126 _invoke (dart:ui/hooks.dart:312:13)
#127 PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:399:5)
#128 _drawFrame (dart:ui/hooks.dart:283:31)
(elided 2 frames from class _AssertionError)
====================================================================================================
======== Exception caught by rendering library =====================================================
The following assertion was thrown during performLayout():
Each child must be laid out exactly once.
The _ScaffoldLayout custom multichild layout delegate forgot to lay out the following child:
_ScaffoldSlot.body: RenderErrorBox#49781 NEEDS-LAYOUT NEEDS-PAINT
parentData: offset=Offset(0.0, 0.0); id=_ScaffoldSlot.body
constraints: MISSING
size: MISSING
The relevant error-causing widget was:
Scaffold Scaffold:file:///Users/dhs/Documents/NCFlutter/app_foo_stable/lib/main.dart:163:16
When the exception was thrown, this was the stack:
#0 MultiChildLayoutDelegate._callPerformLayout.<anonymous closure> (package:flutter/src/rendering/custom_layout.dart:240:11)
#1 MultiChildLayoutDelegate._callPerformLayout (package:flutter/src/rendering/custom_layout.dart:252:8)
#2 RenderCustomMultiChildLayoutBox.performLayout (package:flutter/src/rendering/custom_layout.dart:404:14)
#3 RenderObject._layoutWithoutResize (package:flutter/src/rendering/object.dart:2414:7)
#4 PipelineOwner.flushLayout (package:flutter/src/rendering/object.dart:1051:18)
#5 PipelineOwner.flushLayout (package:flutter/src/rendering/object.dart:1064:15)
#6 RendererBinding.drawFrame (package:flutter/src/rendering/binding.dart:582:23)
#7 WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:991:13)
#8 RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:448:5)
#9 SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1386:15)
#10 SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1311:9)
#11 SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:1169:5)
#12 _invoke (dart:ui/hooks.dart:312:13)
#13 PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:399:5)
#14 _drawFrame (dart:ui/hooks.dart:283:31)
The following RenderObject was being processed when the exception was fired: RenderCustomMultiChildLayoutBox#96ee6 NEEDS-LAYOUT NEEDS-COMPOSITING-BITS-UPDATE
... needs compositing
... parentData: <none> (can use size)
... constraints: BoxConstraints(w=411.4, h=707.4)
... size: Size(411.4, 707.4)
RenderObject: RenderCustomMultiChildLayoutBox#96ee6 NEEDS-LAYOUT NEEDS-COMPOSITING-BITS-UPDATE
needs compositing
parentData: <none> (can use size)
constraints: BoxConstraints(w=411.4, h=707.4)
size: Size(411.4, 707.4)
... child 1: RenderErrorBox#49781 NEEDS-LAYOUT NEEDS-PAINT
... parentData: offset=Offset(0.0, 0.0); id=_ScaffoldSlot.body
... constraints: MISSING
... size: MISSING
... child 2: RenderPadding#ddccb relayoutBoundary=up1
... needs compositing
... parentData: offset=Offset(0.0, 0.0); id=_ScaffoldSlot.body (can use size)
... constraints: BoxConstraints(0.0<=w<=411.4, 0.0<=h<=649.4)
... size: Size(411.4, 649.4)
... padding: EdgeInsets(0.0, 24.0, 0.0, 0.0)
... textDirection: ltr
... child: RenderPositionedBox#07fee DETACHED
... needs compositing
... parentData: MISSING (can use size)
... constraints: BoxConstraints(0.0<=w<=411.4, 0.0<=h<=625.4)
... size: Size(411.4, 625.4)
... alignment: Alignment.center
... textDirection: ltr
... widthFactor: expand
... heightFactor: expand
... child: RenderConstrainedBox#ac893 DETACHED
... needs compositing
... parentData: offset=Offset(0.0, 0.0) (can use size)
... constraints: BoxConstraints(0.0<=w<=411.4, 0.0<=h<=625.4)
... size: Size(411.4, 625.4)
... additionalConstraints: BoxConstraints(0.0<=w<=800.0, 0.0<=h<=Infinity)
... child: RenderFlex#062b6 DETACHED
... needs compositing
... parentData: MISSING (can use size)
... constraints: BoxConstraints(0.0<=w<=411.4, 0.0<=h<=625.4)
... size: Size(411.4, 625.4)
... direction: vertical
... mainAxisAlignment: start
... mainAxisSize: max
... crossAxisAlignment: center
... verticalDirection: down
... child 3: RenderSemanticsAnnotations#84451 relayoutBoundary=up1
... parentData: offset=Offset(0.0, 649.4); id=_ScaffoldSlot.bottomNavigationBar (can use size)
... constraints: BoxConstraints(w=411.4, 0.0<=h<=707.4)
... size: Size(411.4, 58.0)
... child: RenderPhysicalModel#b3f2f relayoutBoundary=up2
... parentData: <none> (can use size)
... constraints: BoxConstraints(w=411.4, 0.0<=h<=707.4)
... size: Size(411.4, 58.0)
... elevation: 8.0
... color: Color(0xfffffbfe)
... shadowColor: Color(0xfffffbfe)
... shape: BoxShape.rectangle
... borderRadius: BorderRadius.zero
... child: _RenderInkFeatures#24a62 relayoutBoundary=up3
... parentData: <none> (can use size)
... constraints: BoxConstraints(w=411.4, 0.0<=h<=707.4)
... size: Size(411.4, 58.0)
... child: RenderConstrainedBox#cc970 relayoutBoundary=up4
... parentData: <none> (can use size)
... constraints: BoxConstraints(w=411.4, 0.0<=h<=707.4)
... size: Size(411.4, 58.0)
... additionalConstraints: BoxConstraints(0.0<=w<=Infinity, 56.0<=h<=Infinity)
... child 4: RenderStack#b9b59 relayoutBoundary=up1
... parentData: offset=Offset(395.4, 633.4); id=_ScaffoldSlot.floatingActionButton (can use size)
... constraints: BoxConstraints(0.0<=w<=411.4, 0.0<=h<=707.4)
... size: Size(0.0, 0.0)
... alignment: Alignment.centerRight
... textDirection: ltr
... fit: loose
... child 1: RenderTransform#90677 relayoutBoundary=up2
... parentData: not positioned; offset=Offset(0.0, 0.0) (can use size)
... constraints: BoxConstraints(0.0<=w<=411.4, 0.0<=h<=707.4)
... size: Size(0.0, 0.0)
... transform matrix: [0] 0.0,0.0,0.0,0.0
[1] 0.0,0.0,0.0,0.0
[2] 0.0,0.0,1.0,0.0
[3] 0.0,0.0,0.0,1.0
... origin: null
... alignment: Alignment.center
... textDirection: ltr
... transformHitTests: true
... child: RenderTransform#25576 relayoutBoundary=up3 NEEDS-PAINT
... parentData: <none> (can use size)
... constraints: BoxConstraints(0.0<=w<=411.4, 0.0<=h<=707.4)
... size: Size(0.0, 0.0)
... transform matrix: [0] 0.7,0.7,0.0,0.0
[1] -0.7,0.7,0.0,0.0
[2] 0.0,0.0,1.0,0.0
[3] 0.0,0.0,0.0,1.0
... origin: null
... alignment: Alignment.center
... textDirection: ltr
... transformHitTests: true
====================================================================================================
======== Exception caught by rendering library =====================================================
The following _TypeError was thrown during paint():
Null check operator used on a null value
The relevant error-causing widget was:
SafeArea SafeArea:file:///Users/dhs/Documents/NCFlutter/app_foo_stable/lib/main.dart:150:34
When the exception was thrown, this was the stack:
#0 RenderShiftedBox.paint (package:flutter/src/rendering/shifted_box.dart:73:61)
#1 RenderObject._paintWithContext (package:flutter/src/rendering/object.dart:3237:7)
#2 PaintingContext.paintChild (package:flutter/src/rendering/object.dart:250:13)
#3 RenderBoxContainerDefaultsMixin.defaultPaint (package:flutter/src/rendering/box.dart:2882:15)
#4 RenderCustomMultiChildLayoutBox.paint (package:flutter/src/rendering/custom_layout.dart:409:5)
#5 RenderObject._paintWithContext (package:flutter/src/rendering/object.dart:3237:7)
#6 PaintingContext.paintChild (package:flutter/src/rendering/object.dart:250:13)
#7 RenderProxyBoxMixin.paint (package:flutter/src/rendering/proxy_box.dart:130:13)
#8 _RenderInkFeatures.paint (package:flutter/src/material/material.dart:662:11)
#9 RenderObject._paintWithContext (package:flutter/src/rendering/object.dart:3237:7)
#10 PaintingContext.paintChild (package:flutter/src/rendering/object.dart:250:13)
#11 RenderProxyBoxMixin.paint (package:flutter/src/rendering/proxy_box.dart:130:13)
#12 RenderPhysicalModel.paint.<anonymous closure> (package:flutter/src/rendering/proxy_box.dart:2049:15)
#13 PaintingContext.pushClipRRect (package:flutter/src/rendering/object.dart:575:14)
#14 RenderPhysicalModel.paint (package:flutter/src/rendering/proxy_box.dart:2036:21)
#15 RenderObject._paintWithContext (package:flutter/src/rendering/object.dart:3237:7)
#16 PaintingContext.paintChild (package:flutter/src/rendering/object.dart:250:13)
#17 _RenderLayoutBuilder.paint (package:flutter/src/widgets/layout_builder.dart:356:15)
#18 RenderObject._paintWithContext (package:flutter/src/rendering/object.dart:3237:7)
#19 PaintingContext.paintChild (package:flutter/src/rendering/object.dart:250:13)
#20 RenderProxyBoxMixin.paint (package:flutter/src/rendering/proxy_box.dart:130:13)
#21 RenderObject._paintWithContext (package:flutter/src/rendering/object.dart:3237:7)
#22 PaintingContext.paintChild (package:flutter/src/rendering/object.dart:250:13)
#23 RenderProxyBoxMixin.paint (package:flutter/src/rendering/proxy_box.dart:130:13)
#24 RenderObject._paintWithContext (package:flutter/src/rendering/object.dart:3237:7)
#25 PaintingContext._repaintCompositedChild (package:flutter/src/rendering/object.dart:166:11)
#26 PaintingContext.repaintCompositedChild (package:flutter/src/rendering/object.dart:109:5)
#27 PipelineOwner.flushPaint (package:flutter/src/rendering/object.dart:1182:31)
#28 PipelineOwner.flushPaint (package:flutter/src/rendering/object.dart:1192:15)
#29 RendererBinding.drawFrame (package:flutter/src/rendering/binding.dart:584:23)
#30 WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:991:13)
#31 RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:448:5)
#32 SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1386:15)
#33 SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1311:9)
#34 SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:1169:5)
#35 _invoke (dart:ui/hooks.dart:312:13)
#36 PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:399:5)
#37 _drawFrame (dart:ui/hooks.dart:283:31)
The following RenderObject was being processed when the exception was fired: RenderPadding#ddccb relayoutBoundary=up1
... needs compositing
... parentData: offset=Offset(0.0, 0.0); id=_ScaffoldSlot.body (can use size)
... constraints: BoxConstraints(0.0<=w<=411.4, 0.0<=h<=649.4)
... size: Size(411.4, 649.4)
... padding: EdgeInsets(0.0, 24.0, 0.0, 0.0)
... textDirection: ltr
RenderObject: RenderPadding#ddccb relayoutBoundary=up1
needs compositing
parentData: offset=Offset(0.0, 0.0); id=_ScaffoldSlot.body (can use size)
constraints: BoxConstraints(0.0<=w<=411.4, 0.0<=h<=649.4)
size: Size(411.4, 649.4)
padding: EdgeInsets(0.0, 24.0, 0.0, 0.0)
textDirection: ltr
... child: RenderPositionedBox#07fee DETACHED
... needs compositing
... parentData: MISSING (can use size)
... constraints: BoxConstraints(0.0<=w<=411.4, 0.0<=h<=625.4)
... size: Size(411.4, 625.4)
... alignment: Alignment.center
... textDirection: ltr
... widthFactor: expand
... heightFactor: expand
... child: RenderConstrainedBox#ac893 DETACHED
... needs compositing
... parentData: offset=Offset(0.0, 0.0) (can use size)
... constraints: BoxConstraints(0.0<=w<=411.4, 0.0<=h<=625.4)
... size: Size(411.4, 625.4)
... additionalConstraints: BoxConstraints(0.0<=w<=800.0, 0.0<=h<=Infinity)
... child: RenderFlex#062b6 DETACHED
... needs compositing
... parentData: MISSING (can use size)
... constraints: BoxConstraints(0.0<=w<=411.4, 0.0<=h<=625.4)
... size: Size(411.4, 625.4)
... direction: vertical
... mainAxisAlignment: start
... mainAxisSize: max
... crossAxisAlignment: center
... verticalDirection: down
... child 1: RenderConstrainedBox#142e8 DETACHED
... needs compositing
... parentData: offset=Offset(0.0, 0.0); flex=1; fit=FlexFit.tight (can use size)
... constraints: BoxConstraints(0.0<=w<=411.4, h=625.4)
... size: Size(411.4, 625.4)
... additionalConstraints: BoxConstraints(0.0<=w<=Infinity, 707.4<=h<=Infinity)
====================================================================================================
stable, master flutter doctor -v
[!] Flutter (Channel stable, 3.19.6, on macOS 12.2.1 21D62 darwin-x64, locale
en-GB)
• Flutter version 3.19.6 on channel stable at
/Users/dhs/documents/fluttersdk/flutter
! Warning: `flutter` on your path resolves to
/Users/dhs/Documents/Fluttersdk/flutter/bin/flutter, which is not inside
your current Flutter SDK checkout at
/Users/dhs/documents/fluttersdk/flutter. Consider adding
/Users/dhs/documents/fluttersdk/flutter/bin to the front of your path.
! Warning: `dart` on your path resolves to
/Users/dhs/Documents/Fluttersdk/flutter/bin/dart, which is not inside your
current Flutter SDK checkout at /Users/dhs/documents/fluttersdk/flutter.
Consider adding /Users/dhs/documents/fluttersdk/flutter/bin to the front
of your path.
• Upstream repository https://github.com/flutter/flutter.git
• Framework revision 54e66469a9 (6 days ago), 2024-04-17 13:08:03 -0700
• Engine revision c4cd48e186
• Dart version 3.3.4
• DevTools version 2.31.1
• If those were intentional, you can disregard the above warnings; however
it is recommended to use "git" directly to perform update checks and
upgrades.
[!] Xcode - develop for iOS and macOS (Xcode 12.3)
• Xcode at /Applications/Xcode.app/Contents/Developer
! Flutter recommends a minimum Xcode version of 13.
Download the latest version or update via the Mac App Store.
• CocoaPods version 1.11.2
[✓] Chrome - develop for the web
• Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome
[✓] VS Code (version 1.62.0)
• VS Code at /Applications/Visual Studio Code.app/Contents
• Flutter extension version 3.21.0
[✓] Connected device (5 available)
• SM G975F (mobile) • RZ8M802WY0X • android-arm64 • Android 11 (API 30)
• Darshan's iphone (mobile) • 21150b119064aecc249dfcfe05e259197461ce23 •
ios • iOS 14.4.1 18D61
• iPhone 12 Pro Max (mobile) • A5473606-0213-4FD8-BA16-553433949729 •
ios • com.apple.CoreSimulator.SimRuntime.iOS-14-3 (simulator)
• macOS (desktop) • macos •
darwin-x64 • Mac OS X 10.15.4 19E2269 darwin-x64
• Chrome (web) • chrome •
web-javascript • Google Chrome 98.0.4758.80
[✓] HTTP Host Availability
• All required HTTP hosts are available
! Doctor found issues in 1 category.
[!] Flutter (Channel master, 3.22.0-23.0.pre.43, on macOS 12.2.1 21D62
darwin-x64, locale en-GB)
• Flutter version 3.22.0-23.0.pre.43 on channel master at
/Users/dhs/documents/fluttersdk/flutter
! Warning: `flutter` on your path resolves to
/Users/dhs/Documents/Fluttersdk/flutter/bin/flutter, which is not inside
your current Flutter SDK checkout at
/Users/dhs/documents/fluttersdk/flutter. Consider adding
/Users/dhs/documents/fluttersdk/flutter/bin to the front of your path.
! Warning: `dart` on your path resolves to
/Users/dhs/Documents/Fluttersdk/flutter/bin/dart, which is not inside your
current Flutter SDK checkout at /Users/dhs/documents/fluttersdk/flutter.
Consider adding /Users/dhs/documents/fluttersdk/flutter/bin to the front
of your path.
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Thank you for the report. To debug this it would help if you could reduce the test case more, see https://github.com/flutter/flutter/wiki/Issue-hygiene#provide-reduced-test-cases
I tried to come up with reduced repro code as below without go_router implementation but it is giving me different error, so probably @premiumbiscuit please try to narrow down the code to bare minimum that still triggers the reported error.
I'm also having this issue with go_router's StatefulShellRoute which makes it unusable. I've tried to attach the bare minimum code (but it still requires go_router as I'll explain)
Recreation steps
-
Setup a statefull hirachy like this: /a /b /b/details
-
Create a LayoutBuilder on page B (we wont visit this page, but it'll trigger the bug)
-
Navigate to page /b/details?t=1
-
Navigate back to /a
-
Navigate to /b/details?t=2 for the second time (CRASH in /b's layout builder*)
It seems like page /b is spawned on the way to /b/details, layout builder asks for a re-layout, but this never happens (due to go_router having the widget off stage), when go_router navigates over it a second time, the widget is already marked as needing layout and causes the error.
You could probably re-create this without go_router by having an 'offstage' widget trigger consecutive re-layouts via a timer or something.
Logs
flutter doctor
PS C:\Users\x\source\repos\flutter_bug\flutter_bug> flutter doctor
Doctor summary (to see all details, run flutter doctor -v):
[√] Flutter (Channel stable, 3.19.0, on Microsoft Windows [Version 10.0.22631.3593], locale en-GB)
[√] Windows Version (Installed version of Windows is version 10 or higher)
[√] Android toolchain - develop for Android devices (Android SDK version 34.0.0)
[√] Chrome - develop for the web
[√] Visual Studio - develop Windows apps (Visual Studio Community 2022 17.8.5)
[√] Android Studio (version 2022.2)
[√] VS Code (version 1.89.1)
[√] Connected device (4 available)
[√] Network resources
• No issues found!
Stack Trace
Launching lib\main.dart on Windows in debug mode...
√ Built build\windows\x64\runner\Debug\flutter_bug.exe.
Connecting to VM Service at ws://127.0.0.1:62751/1Q5oMe9JLFo=/ws
════════ Exception caught by widgets library ═══════════════════════════════════
The following assertion was thrown building Builder:
'package:flutter/src/rendering/object.dart': Failed assertion: line 2283 pos 14: '_debugSubtreeRelayoutRootAlreadyMarkedNeedsLayout()': is not true.
Either the assertion indicates an error in the framework itself, or we should provide substantially more information in this error message to help you determine and fix the underlying cause.
In either case, please report this assertion by filing a bug on GitHub:
https://github.com/flutter/flutter/issues/new?template=2_bug.yml
The relevant error-causing widget was:
Scaffold Scaffold:file:///C:/Users/Jack/source/repos/flutter_bug/flutter_bug/lib/main.dart:71:12
When the exception was thrown, this was the stack:
#2 RenderObject.markNeedsLayout (package:flutter/src/rendering/object.dart:2283:14)
#3 RenderBox.markNeedsLayout (package:flutter/src/rendering/box.dart:2379:11)
#4 RenderConstrainedLayoutBuilder.markNeedsBuild (package:flutter/src/widgets/layout_builder.dart:231:5)
#5 _LayoutBuilderElement.update (package:flutter/src/widgets/layout_builder.dart:112:20)
#6 Element.updateChild (package:flutter/src/widgets/framework.dart:3824:15)
#7 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5505:16)
#8 Element.rebuild (package:flutter/src/widgets/framework.dart:5196:7)
#9 StatelessElement.update (package:flutter/src/widgets/framework.dart:5556:5)
#10 Element.updateChild (package:flutter/src/widgets/framework.dart:3824:15)
#11 SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:6765:14)
#12 Element.updateChild (package:flutter/src/widgets/framework.dart:3824:15)
#13 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5505:16)
#14 Element.rebuild (package:flutter/src/widgets/framework.dart:5196:7)
#15 StatelessElement.update (package:flutter/src/widgets/framework.dart:5556:5)
#16 Element.updateChild (package:flutter/src/widgets/framework.dart:3824:15)
#17 SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:6765:14)
#18 Element.updateChild (package:flutter/src/widgets/framework.dart:3824:15)
#19 SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:6765:14)
#20 Element.updateChild (package:flutter/src/widgets/framework.dart:3824:15)
#21 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5505:16)
#22 StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5643:11)
#23 Element.rebuild (package:flutter/src/widgets/framework.dart:5196:7)
#24 StatefulElement.update (package:flutter/src/widgets/framework.dart:5666:5)
#25 Element.updateChild (package:flutter/src/widgets/framework.dart:3824:15)
#26 SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:6765:14)
#27 Element.updateChild (package:flutter/src/widgets/framework.dart:3824:15)
#28 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5505:16)
#29 StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5643:11)
#30 Element.rebuild (package:flutter/src/widgets/framework.dart:5196:7)
#31 StatefulElement.update (package:flutter/src/widgets/framework.dart:5666:5)
#32 Element.updateChild (package:flutter/src/widgets/framework.dart:3824:15)
#33 SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:6765:14)
#34 Element.updateChild (package:flutter/src/widgets/framework.dart:3824:15)
#35 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5505:16)
#36 StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5643:11)
#37 Element.rebuild (package:flutter/src/widgets/framework.dart:5196:7)
#38 StatefulElement.update (package:flutter/src/widgets/framework.dart:5666:5)
#39 Element.updateChild (package:flutter/src/widgets/framework.dart:3824:15)
#40 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5505:16)
#41 StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5643:11)
#42 Element.rebuild (package:flutter/src/widgets/framework.dart:5196:7)
#43 StatefulElement.update (package:flutter/src/widgets/framework.dart:5666:5)
#44 Element.updateChild (package:flutter/src/widgets/framework.dart:3824:15)
#45 SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:6765:14)
#46 Element.updateChild (package:flutter/src/widgets/framework.dart:3824:15)
#47 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5505:16)
#48 StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5643:11)
#49 Element.rebuild (package:flutter/src/widgets/framework.dart:5196:7)
#50 StatefulElement.update (package:flutter/src/widgets/framework.dart:5666:5)
#51 Element.updateChild (package:flutter/src/widgets/framework.dart:3824:15)
#52 SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:6765:14)
#53 Element.updateChild (package:flutter/src/widgets/framework.dart:3824:15)
#54 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5505:16)
#55 StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5643:11)
#56 Element.rebuild (package:flutter/src/widgets/framework.dart:5196:7)
#57 StatefulElement.update (package:flutter/src/widgets/framework.dart:5666:5)
#58 Element.updateChild (package:flutter/src/widgets/framework.dart:3824:15)
#59 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5505:16)
#60 StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5643:11)
#61 Element.rebuild (package:flutter/src/widgets/framework.dart:5196:7)
#62 StatefulElement.update (package:flutter/src/widgets/framework.dart:5666:5)
#63 Element.updateChild (package:flutter/src/widgets/framework.dart:3824:15)
#64 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5505:16)
#65 Element.rebuild (package:flutter/src/widgets/framework.dart:5196:7)
#66 StatelessElement.update (package:flutter/src/widgets/framework.dart:5556:5)
#67 Element.updateChild (package:flutter/src/widgets/framework.dart:3824:15)
#68 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5505:16)
#69 StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5643:11)
#70 Element.rebuild (package:flutter/src/widgets/framework.dart:5196:7)
#71 StatefulElement.update (package:flutter/src/widgets/framework.dart:5666:5)
#72 Element.updateChild (package:flutter/src/widgets/framework.dart:3824:15)
#73 SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:6765:14)
#74 Element.updateChild (package:flutter/src/widgets/framework.dart:3824:15)
#75 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5505:16)
#76 Element.rebuild (package:flutter/src/widgets/framework.dart:5196:7)
#77 ProxyElement.update (package:flutter/src/widgets/framework.dart:5809:5)
#78 _InheritedNotifierElement.update (package:flutter/src/widgets/inherited_notifier.dart:105:11)
#79 Element.updateChild (package:flutter/src/widgets/framework.dart:3824:15)
#80 SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:6765:14)
#81 Element.updateChild (package:flutter/src/widgets/framework.dart:3824:15)
#82 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5505:16)
#83 StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5643:11)
#84 Element.rebuild (package:flutter/src/widgets/framework.dart:5196:7)
#85 StatefulElement.update (package:flutter/src/widgets/framework.dart:5666:5)
#86 Element.updateChild (package:flutter/src/widgets/framework.dart:3824:15)
#87 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5505:16)
#88 Element.rebuild (package:flutter/src/widgets/framework.dart:5196:7)
#89 ProxyElement.update (package:flutter/src/widgets/framework.dart:5809:5)
#90 Element.updateChild (package:flutter/src/widgets/framework.dart:3824:15)
#91 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5505:16)
#92 Element.rebuild (package:flutter/src/widgets/framework.dart:5196:7)
#93 ProxyElement.update (package:flutter/src/widgets/framework.dart:5809:5)
#94 Element.updateChild (package:flutter/src/widgets/framework.dart:3824:15)
#95 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5505:16)
#96 StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5643:11)
#97 Element.rebuild (package:flutter/src/widgets/framework.dart:5196:7)
#98 StatefulElement.update (package:flutter/src/widgets/framework.dart:5666:5)
#99 Element.updateChild (package:flutter/src/widgets/framework.dart:3824:15)
#100 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5505:16)
#101 Element.rebuild (package:flutter/src/widgets/framework.dart:5196:7)
#102 StatelessElement.update (package:flutter/src/widgets/framework.dart:5556:5)
#103 Element.updateChild (package:flutter/src/widgets/framework.dart:3824:15)
#104 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5505:16)
#105 Element.rebuild (package:flutter/src/widgets/framework.dart:5196:7)
#106 StatelessElement.update (package:flutter/src/widgets/framework.dart:5556:5)
#107 Element.updateChild (package:flutter/src/widgets/framework.dart:3824:15)
#108 SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:6765:14)
#109 Element.updateChild (package:flutter/src/widgets/framework.dart:3824:15)
#110 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5505:16)
#111 Element.rebuild (package:flutter/src/widgets/framework.dart:5196:7)
#112 ProxyElement.update (package:flutter/src/widgets/framework.dart:5809:5)
#113 Element.updateChild (package:flutter/src/widgets/framework.dart:3824:15)
#114 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5505:16)
#115 Element.rebuild (package:flutter/src/widgets/framework.dart:5196:7)
#116 ProxyElement.update (package:flutter/src/widgets/framework.dart:5809:5)
#117 Element.updateChild (package:flutter/src/widgets/framework.dart:3824:15)
#118 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5505:16)
#119 StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5643:11)
#120 Element.rebuild (package:flutter/src/widgets/framework.dart:5196:7)
#121 StatefulElement.update (package:flutter/src/widgets/framework.dart:5666:5)
#122 Element.updateChild (package:flutter/src/widgets/framework.dart:3824:15)
#123 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5505:16)
#124 StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5643:11)
#125 Element.rebuild (package:flutter/src/widgets/framework.dart:5196:7)
#126 StatefulElement.update (package:flutter/src/widgets/framework.dart:5666:5)
#127 Element.updateChild (package:flutter/src/widgets/framework.dart:3824:15)
#128 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:5505:16)
#129 StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:5643:11)
#130 Element.rebuild (package:flutter/src/widgets/framework.dart:5196:7)
#131 BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:2904:19)
#132 WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:989:21)
#133 RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:448:5)
#134 SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1386:15)
#135 SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1311:9)
#136 SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:1169:5)
#137 _invoke (dart:ui/hooks.dart:312:13)
#138 PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:399:5)
#139 _drawFrame (dart:ui/hooks.dart:283:31)
(elided 2 frames from class _AssertionError)
════════════════════════════════════════════════════════════════════════════════
Sample code
Run and click the button 3 times
import 'package:flutter/material.dart';
import 'package:go_router/go_router.dart';
void main() {
runApp(MainApp());
}
class MainApp extends StatelessWidget {
MainApp({super.key});
final _aBranch = GlobalKey<NavigatorState>(debugLabel: 'a');
final _bBranch = GlobalKey<NavigatorState>(debugLabel: 'b');
late GoRouter router = GoRouter(initialLocation: '/a', routes: <RouteBase>[
StatefulShellRoute.indexedStack(
builder: (context, state, navigationShell) => Scaffold(body: navigationShell),
branches: <StatefulShellBranch>[
StatefulShellBranch(navigatorKey: _aBranch, routes: [
GoRoute(
path: '/a',
name: 'a',
builder: (context, state) => Center(
child: Column(
children: [
const Text('Page /a'),
ElevatedButton(
onPressed: () => context.go(
Uri(path: '/b/details', queryParameters: {'qs': DateTime.now().toIso8601String()})
.toString()),
child: const Text('Go To /b/details (again)')),
],
)),
)
]),
StatefulShellBranch(navigatorKey: _bBranch, routes: [
GoRoute(
path: '/b',
name: 'b',
builder: (context, state) => LayoutBuilder(
builder: (context, constraints) => Container(
width: 100,
child: const Text("Page /b (this is never visted but rendered and causes a layout error)"),
)),
routes: [
GoRoute(
path: 'details',
name: '/b/details',
builder: (context, state) => Column(children: [
const Text('Page /b/details'),
ElevatedButton(onPressed: () => context.go('/a'), child: Text('Go back to /a')),
]),
),
])
]),
])
]);
@override
Widget build(BuildContext context) {
return MaterialApp.router(
title: 'Crash State error',
routerConfig: router,
);
}
}
The code provided by @xortuna is exactly my issue. Combination of StatefulShellRoute, LayoutBuilder (or usage of MediaQuery) and any kind of re-rendering on the Shell page causes the exception.
Moving to ShellRoute doesn't seem to produce the issue but is far from my ideal in my case
Also having the same issue. Works fine in release mode. for me it was like this /a /b /ba if I am in /ba, and I reload the webapp, I will again be in /ba, and if I go back to /b there is no issue. But if I go to /a from /ba, then I'll get this same error. I won't get this issue if I don't reload the app and simple use it or if the app is in release mode @premiumbiscuit Did you find any solution?
@saadzarif - I have temporarily switched over to ShellRoute instead of StatefulShellRoute, which doesn't suffer from the same problem. It's less than ideal but does the job until the issue is resolved.
I have the same behavior as @xortuna described in https://github.com/flutter/flutter/issues/147452#issuecomment-2125910259
Adding the following code causes the same error message but only on android devices.
ThemeData(
pageTransitionsTheme: const PageTransitionsTheme(
builders: {
TargetPlatform.android: OpenUpwardsPageTransitionsBuilder(),
TargetPlatform.iOS: CupertinoPageTransitionsBuilder(),
TargetPlatform.fuchsia: OpenUpwardsPageTransitionsBuilder(),
},
),
),
Seems like many packages adopted into flutter get abandoned. It’s shocking that this issue is unaddressed despite being the de-facto standard in creating tabbed iOS apps. If a widget is off stage it should not care if it’s asked to relayout multiple times, raising an assertion in this state does not make sense.
For now I’ve mostly avoided using layout builder and rewrote widgets in house that use it. The issue does not appear in release mode, but that’s simply due to the fact there’s no debugger raising the assertion.
I get a similar error (tried on web) with the following example (on the current master 3.27.x):
import 'package:flutter/material.dart';
import 'package:go_router/go_router.dart';
void main() => runApp(const MyApp());
class MyApp extends StatelessWidget {
const MyApp({super.key});
@override
Widget build(BuildContext context) {
final router = GoRouter(
// Default to the nested location
// Or for a more realistic use-case, navigate to the url /root/sub on the web
initialLocation: '/root/sub',
routes: [
StatefulShellRoute.indexedStack(
builder: (context, state, navigationShell) {
// return Scaffold(body: const ListTile(title: Text('someText'))); // Does work
return Scaffold(body: navigationShell); // Does not work
},
branches: [
StatefulShellBranch(routes: [
GoRoute(
path: '/root',
builder: (_, __) {
return Ink(
child: const Text('rootA'),
);
},
routes: [
// Must be nested, so layouts are stacked on top
GoRoute(
path: 'sub',
builder: (_, __) {
return const Text('subA');
},
),
],
),
]),
]),
],
);
return MaterialApp.router(
routerConfig: router,
);
}
}
Logs
Synthetic package output (package:flutter_gen) is deprecated: https://flutter.dev/to/flutter-gen-deprecation. In a future release, synthetic-package will default to `false` and will later be removed entirely.
Launching lib/stateful_shell_route_list_tile_example.dart on Chrome in debug mode...
Waiting for connection from debug service on Chrome...
This app is linked to the debug service: ws://127.0.0.1:54285/zimIpExviXw=/ws
Debug service listening on ws://127.0.0.1:54285/zimIpExviXw=/ws
Debug service listening on ws://127.0.0.1:54285/zimIpExviXw=/ws
======== Exception caught by rendering library =====================================================
The following assertion was thrown during paint():
Assertion failed: file:///Users/swi-oberhauser/Documents/git/flutter/flutter/packages/flutter/lib/src/rendering/box.dart:2176:12
hasSize
"RenderBox was not laid out: RenderFractionalTranslation#11817 NEEDS-LAYOUT NEEDS-PAINT"
The relevant error-causing widget was:
Scaffold Scaffold:file:///Users/swi-oberhauser/Documents/git/swissinfo/swi-toolbox/lib/stateful_shell_route_list_tile_example.dart:20:22
When the exception was thrown, this was the stack:
dart-sdk/lib/_internal/js_dev_runtime/private/ddc_runtime/errors.dart 307:3 throw_
dart-sdk/lib/_internal/js_dev_runtime/private/profile.dart 117:39 assertFailed
packages/flutter/src/rendering/box.dart 2176:12 get size
packages/flutter/src/rendering/proxy_box.dart 2977:29 applyPaintTransform
packages/flutter/src/material/material.dart 762:19 _getPaintTransform
packages/flutter/src/material/material.dart 776:32 [_paint]
packages/flutter/src/material/material.dart 616:19 paint
packages/flutter/src/rendering/object.dart 3287:7 [_paintWithContext]
packages/flutter/src/rendering/object.dart 261:12 paintChild
packages/flutter/src/rendering/proxy_box.dart 142:12 paint
packages/flutter/src/rendering/proxy_box.dart 2099:15 <fn>
packages/flutter/src/rendering/object.dart 586:7 pushClipRRect
packages/flutter/src/rendering/proxy_box.dart 2086:20 paint
packages/flutter/src/rendering/object.dart 3287:7 [_paintWithContext]
packages/flutter/src/rendering/object.dart 261:12 paintChild
packages/flutter/src/rendering/proxy_box.dart 142:12 paint
packages/flutter/src/rendering/object.dart 3287:7 [_paintWithContext]
packages/flutter/src/rendering/object.dart 261:12 paintChild
packages/flutter/src/rendering/proxy_box.dart 142:12 paint
packages/flutter/src/rendering/object.dart 3287:7 [_paintWithContext]
packages/flutter/src/rendering/object.dart 177:10 _repaintCompositedChild
packages/flutter/src/rendering/object.dart 120:5 repaintCompositedChild
packages/flutter/src/rendering/object.dart 272:7 [_compositeChild]
packages/flutter/src/rendering/object.dart 253:7 paintChild
packages/flutter/src/rendering/proxy_box.dart 142:12 paint
packages/flutter/src/rendering/object.dart 3287:7 [_paintWithContext]
packages/flutter/src/rendering/object.dart 261:12 paintChild
packages/flutter/src/rendering/box.dart 3171:14 defaultPaint
packages/flutter/src/rendering/stack.dart 660:5 paintStack
packages/flutter/src/rendering/stack.dart 676:7 paint
packages/flutter/src/rendering/object.dart 3287:7 [_paintWithContext]
packages/flutter/src/rendering/object.dart 261:12 paintChild
packages/flutter/src/rendering/proxy_box.dart 142:12 paint
packages/flutter/src/rendering/proxy_box.dart 2357:11 paint
packages/flutter/src/rendering/object.dart 3287:7 [_paintWithContext]
packages/flutter/src/rendering/object.dart 261:12 paintChild
packages/flutter/src/rendering/proxy_box.dart 142:12 paint
packages/flutter/src/rendering/proxy_box.dart 2967:13 paint
packages/flutter/src/rendering/object.dart 3287:7 [_paintWithContext]
packages/flutter/src/rendering/object.dart 261:12 paintChild
packages/flutter/src/rendering/proxy_box.dart 142:12 paint
packages/flutter/src/rendering/proxy_box.dart 2967:13 paint
packages/flutter/src/rendering/object.dart 3287:7 [_paintWithContext]
packages/flutter/src/rendering/object.dart 261:12 paintChild
packages/flutter/src/rendering/proxy_box.dart 142:12 paint
packages/flutter/src/rendering/object.dart 3287:7 [_paintWithContext]
packages/flutter/src/rendering/object.dart 177:10 _repaintCompositedChild
packages/flutter/src/rendering/object.dart 120:5 repaintCompositedChild
packages/flutter/src/rendering/object.dart 272:7 [_compositeChild]
packages/flutter/src/rendering/object.dart 253:7 paintChild
packages/flutter/src/rendering/proxy_box.dart 142:12 paint
packages/flutter/src/rendering/object.dart 3287:7 [_paintWithContext]
packages/flutter/src/rendering/object.dart 261:12 paintChild
packages/flutter/src/rendering/proxy_box.dart 142:12 paint
packages/flutter/src/rendering/proxy_box.dart 3758:11 paint
packages/flutter/src/rendering/object.dart 3287:7 [_paintWithContext]
packages/flutter/src/rendering/object.dart 261:12 paintChild
packages/flutter/src/rendering/proxy_box.dart 142:12 paint
packages/flutter/src/rendering/object.dart 3287:7 [_paintWithContext]
packages/flutter/src/rendering/object.dart 261:12 paintChild
packages/flutter/src/widgets/overlay.dart 1043:14 paint
packages/flutter/src/rendering/object.dart 497:5 pushLayer
packages/flutter/src/rendering/object.dart 557:7 pushClipRect
packages/flutter/src/widgets/overlay.dart 1362:37 paint
packages/flutter/src/rendering/object.dart 3287:7 [_paintWithContext]
packages/flutter/src/rendering/object.dart 261:12 paintChild
packages/flutter/src/rendering/proxy_box.dart 142:12 paint
packages/flutter/src/rendering/object.dart 3287:7 [_paintWithContext]
packages/flutter/src/rendering/object.dart 261:12 paintChild
packages/flutter/src/rendering/proxy_box.dart 142:12 paint
packages/flutter/src/rendering/object.dart 3287:7 [_paintWithContext]
packages/flutter/src/rendering/object.dart 261:12 paintChild
packages/flutter/src/rendering/proxy_box.dart 142:12 paint
packages/flutter/src/rendering/custom_paint.dart 636:11 paint
packages/flutter/src/rendering/object.dart 3287:7 [_paintWithContext]
packages/flutter/src/rendering/object.dart 261:12 paintChild
packages/flutter/src/rendering/proxy_box.dart 142:12 paint
packages/flutter/src/rendering/object.dart 3287:7 [_paintWithContext]
packages/flutter/src/rendering/object.dart 261:12 paintChild
packages/flutter/src/rendering/proxy_box.dart 142:12 paint
packages/flutter/src/rendering/object.dart 3287:7 [_paintWithContext]
packages/flutter/src/rendering/object.dart 261:12 paintChild
packages/flutter/src/rendering/proxy_box.dart 142:12 paint
packages/flutter/src/rendering/object.dart 3287:7 [_paintWithContext]
packages/flutter/src/rendering/object.dart 261:12 paintChild
packages/flutter/src/rendering/proxy_box.dart 142:12 paint
packages/flutter/src/rendering/object.dart 3287:7 [_paintWithContext]
packages/flutter/src/rendering/object.dart 261:12 paintChild
packages/flutter/src/rendering/proxy_box.dart 142:12 paint
packages/flutter/src/rendering/object.dart 3287:7 [_paintWithContext]
packages/flutter/src/rendering/object.dart 261:12 paintChild
packages/flutter/src/rendering/proxy_box.dart 142:12 paint
packages/flutter/src/rendering/object.dart 3287:7 [_paintWithContext]
packages/flutter/src/rendering/object.dart 261:12 paintChild
packages/flutter/src/rendering/proxy_box.dart 142:12 paint
packages/flutter/src/rendering/object.dart 3287:7 [_paintWithContext]
packages/flutter/src/rendering/object.dart 261:12 paintChild
packages/flutter/src/rendering/view.dart 313:14 paint
packages/flutter/src/rendering/object.dart 3287:7 [_paintWithContext]
packages/flutter/src/rendering/object.dart 177:10 _repaintCompositedChild
packages/flutter/src/rendering/object.dart 120:5 repaintCompositedChild
packages/flutter/src/rendering/object.dart 1193:31 flushPaint
packages/flutter/src/rendering/object.dart 1203:14 flushPaint
packages/flutter/src/rendering/binding.dart 611:5 drawFrame
packages/flutter/src/widgets/binding.dart 1178:13 drawFrame
packages/flutter/src/rendering/binding.dart 475:5 [_handlePersistentFrameCallback]
packages/flutter/src/scheduler/binding.dart 1397:7 [_invokeFrameCallback]
packages/flutter/src/scheduler/binding.dart 1318:9 handleDrawFrame
packages/flutter/src/scheduler/binding.dart 1040:9 <fn>
dart-sdk/lib/_internal/js_dev_runtime/private/isolate_helper.dart 47:11 internalCallback
The following RenderObject was being processed when the exception was fired: _RenderInkFeatures#8f7ac
... needs compositing
... parentData: <none> (can use size)
... constraints: BoxConstraints(w=1728.0, h=922.0)
... size: Size(1728.0, 922.0)
RenderObject: _RenderInkFeatures#8f7ac
needs compositing
parentData: <none> (can use size)
constraints: BoxConstraints(w=1728.0, h=922.0)
size: Size(1728.0, 922.0)
... child: RenderCustomMultiChildLayoutBox#ae60e NEEDS-PAINT
... needs compositing
... parentData: <none> (can use size)
... constraints: BoxConstraints(w=1728.0, h=922.0)
... size: Size(1728.0, 922.0)
... child 1: RenderIndexedStack#46277 relayoutBoundary=up1 NEEDS-PAINT
... needs compositing
... parentData: offset=Offset(0.0, 0.0); id=_ScaffoldSlot.body (can use size)
... constraints: BoxConstraints(0.0<=w<=1728.0, 0.0<=h<=922.0)
... size: Size(1728.0, 922.0)
... alignment: AlignmentDirectional.topStart
... textDirection: ltr
... fit: loose
... index: 0
... child 1: _RenderVisibility#dba4c relayoutBoundary=up2 NEEDS-PAINT
... needs compositing
... parentData: not positioned; offset=Offset(0.0, 0.0) (can use size)
... constraints: BoxConstraints(0.0<=w<=1728.0, 0.0<=h<=922.0)
... size: Size(1728.0, 922.0)
... child: RenderIgnorePointer#18d03 relayoutBoundary=up3 NEEDS-PAINT
... needs compositing
... parentData: <none> (can use size)
... constraints: BoxConstraints(0.0<=w<=1728.0, 0.0<=h<=922.0)
... size: Size(1728.0, 922.0)
... ignoring: false
... ignoringSemantics: null
... child 2: RenderStack#09328 relayoutBoundary=up1 NEEDS-PAINT
... parentData: offset=Offset(1712.0, 906.0); id=_ScaffoldSlot.floatingActionButton (can use size)
... constraints: BoxConstraints(0.0<=w<=1728.0, 0.0<=h<=922.0)
... size: Size(0.0, 0.0)
... alignment: Alignment.centerRight
... textDirection: ltr
... fit: loose
... child 1: RenderTransform#b0b91 relayoutBoundary=up2 NEEDS-PAINT
... parentData: not positioned; offset=Offset(0.0, 0.0) (can use size)
... constraints: BoxConstraints(0.0<=w<=1728.0, 0.0<=h<=922.0)
... size: Size(0.0, 0.0)
... transform matrix: [0] 0.0,0.0,0.0,0.0
[1] 0.0,0.0,0.0,0.0
[2] 0.0,0.0,1.0,0.0
[3] 0.0,0.0,0.0,1.0
... origin: null
... alignment: Alignment.center
... textDirection: ltr
... transformHitTests: true
... child: RenderTransform#e4014 relayoutBoundary=up3 NEEDS-PAINT
... parentData: <none> (can use size)
... constraints: BoxConstraints(0.0<=w<=1728.0, 0.0<=h<=922.0)
... size: Size(0.0, 0.0)
... transform matrix: [0] 0.7,0.7,0.0,0.0
[1] -0.7,0.7,0.0,0.0
[2] 0.0,0.0,1.0,0.0
[3] 0.0,0.0,0.0,1.0
... origin: null
... alignment: Alignment.center
... textDirection: ltr
... transformHitTests: true
... child 3: RenderPointerListener#98d4d NEEDS-PAINT
... parentData: offset=Offset(0.0, 0.0); id=_ScaffoldSlot.statusBar (can use size)
... constraints: BoxConstraints(w=1728.0, h=0.0)
... size: Size(1728.0, 0.0)
... behavior: opaque
... listeners: down, panZoomStart
====================================================================================================
Flutter Doctor
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your path.
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[✓] Android toolchain - develop for Android devices (Android SDK version 35.0.0)
[!] Xcode - develop for iOS and macOS (Xcode 16.0)
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! Doctor found issues in 3 categories.
@orkun1675 you can return an empty Container, if the current route is NOT the top route in the ~StatefulShellRoute.builder~ StatefulShellBranch.GoRoute.pageBuilder. So underlaying widgets are not in the widget tree, which then won't need to be rendered without layout phase.
@orkun1675 you can return an empty Container, if the current route is NOT the top route in the StatefulShellRoute.builder. So underlaying widgets are not in the widget tree, which then won't need to be rendered without layout phase.
Do you have a code example on how to check for this? I'm guessing I could then create a widget that does this check and place between the StatefulShellRoute and the page to prevent the entire visual tree being processed 👍
I was mistaken, we solved it by adding this to the StatefulShellBranch.GoRoute.pageBuilder:
StatefulShellRoute.indexedStack(
builder: (context, state, navigationShell) {
// return your stuff with `navigationShell`
},
branches: [
StatefulShellBranch(routes: [
GoRoute(
path: '/a',
pageBuilder: (context, state) {
// TODO: Remove SizedBox check as soon as https://github.com/flutter/flutter/issues/147452 is fixed.
// Explanation: some widgets in the routes are used, which want to be painted, although the layout is not ready yet.
// This happens, e.g. when calling a freshly new page, and the routes are stacked on top of each other,
// then only the top most is layouted in the routers `Overlay` widget, but the others aren't.
// To prevent this we render a SizeBox only in the underlying routes.
final widget = state.topRoute?.path == ':myParam'
? const SizedBox()
: MyWidget();
return buildPageWithoutAnimation(
context: context,
state: state,
child: widget,
);
},
routes: [
GoRoute(
path: '/a/:myParam',
pageBuilder: (context, state) {
return buildPageWithoutAnimation(
context: context,
state: state,
child: MySubWidget(),
);
},
),
],
),
]),
Thank for sharing @Gustl22 , unfortunately this approach breaks the statefulness of the shell branch: the page state is not retained when navigating away.
For now it should be solvable by wrapping the inner shell Routes builder with a Material class. This avoids registering the InkDecoration (which is used in many widgets) at the outer Scaffold (which is a Material).
Code
class MyApp extends StatelessWidget {
const MyApp({super.key});
@override
Widget build(BuildContext context) {
final router = GoRouter(
// Default to the nested location
// Or for a more realistic use-case, navigate to the url /root/sub on the web
initialLocation: '/root/sub',
routes: [
ShellRoute(
builder: (context, state, navigationShell) {
// Outer material or Scaffold
return Material(child: navigationShell);
},
routes: [
GoRoute(
path: '/root',
builder: (context, __) {
// Add a Material widget HERE to provide a context for the Ink.
return Material(
child: Ink(
child: InkWell(
onTap: () => context.push('/root/sub'),
child: Container(width: 111, height: 112, color: Colors.red),
),
),
);
},
routes: [
// Must be nested, so layouts are stacked on top
GoRoute(
path: 'sub',
builder: (context, __) {
return Container(width: 222, height: 223, color: Colors.blue);
},
),
],
),
],
),
],
);
return MaterialApp.router(routerConfig: router);
}
}
I think that assert is for catching framework errors, and it unfortunately has false positives (meaning, it should be perfectly fine to ignore it, or go to object.dart to comment out the assert).
The assert itself is a bit problematic because it tries to verify a RenderObject that's already marked as dirty is reachable via treewalk, but there are render objects which deliberately skip laying out its children such as `_RenderTheater` or `RenderMultiSliverAdaptor`. It should be perfectly legal for these render objects to have offstage children that are dirty (and are not relayout boundaries), when the render objects themselves are clean.
