Unhandled Exception: 'package:flutter/src/widgets/routes.dart': Failed assertion: line 1537 pos 12: 'scope != null': is not true.🐛

[TENX-S]

The following exception occurred when calling showDialog from MenuFlyoutItem:

[ERROR:flutter/runtime/dart_vm_initializer.cc(41)] Unhandled Exception: 'package:flutter/src/widgets/routes.dart': Failed assertion: line 1537 pos 12: 'scope != null': is not true.
#0      _AssertionError._doThrowNew (dart:core-patch/errors_patch.dart:51:61)
#1      _AssertionError._throwNew (dart:core-patch/errors_patch.dart:40:5)
#2      ModalRoute.willPop (package:flutter/src/widgets/routes.dart:1537:12)
#3      NavigatorState.maybePop (package:flutter/src/widgets/navigator.dart:5225:74)
#4      MenuFlyoutItem.build.<anonymous closure> (package:fluent_ui/src/controls/flyouts/menu.dart:285:33)
#5      GestureRecognizer.invokeCallback (package:flutter/src/gestures/recognizer.dart:315:24)
#6      TapGestureRecognizer.handleTapUp (package:flutter/src/gestures/tap.dart:652:11)
#7      BaseTapGestureRecognizer._checkUp (package:flutter/src/gestures/tap.dart:309:5)
#8      BaseTapGestureRecognizer.handlePrimaryPointer (package:flutter/src/gestures/tap.dart:242:7)
#9      PrimaryPointerGestureRecognizer.handleEvent (package:flutter/src/gestures/recognizer.dart:670:9)
#10     PointerRouter._dispatch (package:flutter/src/gestures/pointer_router.dart:98:12)
#11     PointerRouter._dispatchEventToRoutes.<anonymous closure> (package:flutter/src/gestures/pointer_router.dart:143:9)
#12     _LinkedHashMapMixin.forEach (dart:collection-patch/compact_hash.dart:633:13)
#13     PointerRouter._dispatchEventToRoutes (package:flutter/src/gestures/pointer_router.dart:141:18)
#14     PointerRouter.route (package:flutter/src/gestures/pointer_router.dart:127:7)
#15     GestureBinding.handleEvent (package:flutter/src/gestures/binding.dart:495:19)
#16     GestureBinding.dispatchEvent (package:flutter/src/gestures/binding.dart:475:22)
#17     RendererBinding.dispatchEvent (package:flutter/src/rendering/binding.dart:430:11)
#18     GestureBinding._handlePointerEventImmediately (package:flutter/src/gestures/binding.dart:420:7)
#19     GestureBinding.handlePointerEvent (package:flutter/src/gestures/binding.dart:383:5)
#20     GestureBinding._flushPointerEventQueue (package:flutter/src/gestures/binding.dart:330:7)
#21     GestureBinding._handlePointerDataPacket (package:flutter/src/gestures/binding.dart:299:9)
#22     _invoke1 (dart:ui/hooks.dart:328:13)
#23     PlatformDispatcher._dispatchPointerDataPacket (dart:ui/platform_dispatcher.dart:409:7)
#24     _dispatchPointerDataPacket (dart:ui/hooks.dart:262:31)

Minimal reproducible code:

import 'package:fluent_ui/fluent_ui.dart';

void main() {
  WidgetsFlutterBinding.ensureInitialized();
  runApp(const App());
}

class App extends StatelessWidget {
  const App({super.key});

  @override
  Widget build(BuildContext context) {
    return const FluentApp(
      home: HomePage(),
    );
  }
}

class HomePage extends StatefulWidget {
  const HomePage({super.key});

  @override
  State<HomePage> createState() => _HomePageState();
}

class _HomePageState extends State<HomePage> {
  final controller = FlyoutController();

  @override
  void dispose() {
    controller.dispose();
    super.dispose();
  }

  void _showDialog() {
    showDialog<bool>(
      context: context,
      builder: (context) => ContentDialog(
        title: const Text('Sure to do something?'),
        actions: [
          FilledButton(
            child: const Text('Yes'),
            onPressed: () {
              Navigator.pop(context, true);
            },
          ),
          Button(
            child: const Text('No'),
            onPressed: () => Navigator.pop(context, false),
          ),
        ],
      ),
    );
  }

  @override
  Widget build(BuildContext context) {
    return NavigationView(
      content: ScaffoldPage(
        content: Center(
          child: FlyoutTarget(
            controller: controller,
            child: Button(
              onPressed: () {
                controller.showFlyout(
                  builder: (context) => MenuFlyout(
                    items: [
                      MenuFlyoutItem(
                        text: const Text('Operation'),
                        onPressed: _showDialog,
                      ),
                    ],
                  ),
                );
              },
              child: const Text('show dialog'),
            ),
          ),
        ),
      ),
    );
  }
}

test.mp4

[MarlonSantosDev]

Current version 4.8.5, the problem persists

[bdlukaa]

this hasn't landed on pub.dev yet. You can use the code from master, see this

[bdlukaa]

@MarlonSantosDev Published a new version!