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Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true. #63825

@psatler

Description

@psatler

I have a NestedScrollView inside a TabBarController. In the headerSliverBuilder I have some slivers, which the last one being a SliverPersistentHeader, similar to the one found in this medium's article about slivers. The body of the NestedScrollView has a TabBarView as a child, which in turn has a ListView as children.

This ListView has the property physics as BouncingScrollPhysics() and also shrinkWrap as true.

Steps to Reproduce

When I swipe very fast from the bottom of the screen to the top, an exception is thrown by the animation library telling 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true. So, explaining in more detail, the scroll starts from the bottom of the screen (finger on top of SliverList with Containers inside), and then goes up very fast, so all the Slivers and the body of the NestedScrollView scrolls up as well completely, getting the bounce of the ListView.

The full logs are shown below, though.

The piece of code to reproduce this is the following:

import 'package:flutter/material.dart';

import 'dart:math' as math;

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

class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
        visualDensity: VisualDensity.adaptivePlatformDensity,
      ),
      home: MyHomePage(),
    );
  }
}

class MyHomePage extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Container(
      child: Scaffold(
          body: DefaultTabController(
        length: 2,
        child: NestedScrollView(
          headerSliverBuilder: (context, innerBoxIsScrolled) {
            return [
              SliverAppBar(
                title: Text('SliverAppBar'),
                backgroundColor: Colors.green,
                pinned: true,
                expandedHeight: 200.0,
                flexibleSpace: FlexibleSpaceBar(
                  background: Image.network(
                    'https://www.capixabadagema.com.br/wp-content/uploads/2015/06/Capixaba-da-Gema-Vit%C3%B3ria-ES-Brasil-16.jpg',
                    fit: BoxFit.cover,
                  ),
                ),
              ),
              SliverList(
                delegate: SliverChildListDelegate(
                  [
                    Container(color: Colors.pink, height: 150.0),
                    Container(color: Colors.cyan, height: 150.0),
                    Container(color: Colors.indigo, height: 150.0),
                    Container(color: Colors.blue, height: 150.0),
                  ],
                ),
              ),
              SliverPersistentHeader(
                pinned: true,
                delegate: _SliverAppBarDelegate(
                  minHeight: 60.0,
                  maxHeight: 90.0,
                  child: Container(
                    color: Colors.white,
                    child: TabBar(
                      tabs: [
                        Tab(text: "Tab 1"),
                        Tab(text: "Tab 2"),
                      ],
                      labelColor: Colors.black,
                    ),
                  ),
                ),
              )
            ];
          },
          body: TabBarView(
            children: [
              DummyListView(),
              DummyListView(),
            ],
          ),
        ),
      )),
    );
  }
}

class DummyListView extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return ListView.separated(
      itemBuilder: (context, index) {
        return ListTile(
          leading: Icon(
            Icons.person,
          ),
          title: Text('Text $index'),
        );
      },
      separatorBuilder: (context, index) => Divider(),
      itemCount: 10,
      physics: BouncingScrollPhysics(),
      shrinkWrap: true,
    );
  }
}

class _SliverAppBarDelegate extends SliverPersistentHeaderDelegate {
  _SliverAppBarDelegate({
    @required this.minHeight,
    @required this.maxHeight,
    @required this.child,
  });
  final double minHeight;
  final double maxHeight;
  final Widget child;
  @override
  double get minExtent => minHeight;
  @override
  double get maxExtent => math.max(maxHeight, minHeight);
  @override
  Widget build(
      BuildContext context, double shrinkOffset, bool overlapsContent) {
    return new SizedBox.expand(child: child);
  }

  @override
  bool shouldRebuild(_SliverAppBarDelegate oldDelegate) {
    return maxHeight != oldDelegate.maxHeight ||
        minHeight != oldDelegate.minHeight ||
        child != oldDelegate.child;
  }
}

Expected results:

I expect that no exceptions should be thrown.

Actual results:

When I scroll very fast the ListView from bottom to top, as explained above, and the ListView bounces, an exception is being thrown in the animation library.

Logs
  • By running with flutter run --verbose:
[+8205 ms] I/flutter (15824): ══╡ EXCEPTION CAUGHT BY ANIMATION LIBRARY ╞═════════════════════════════════════════════════════════
[        ] I/flutter (15824): The following assertion was thrown while notifying listeners for AnimationController:
[        ] I/flutter (15824): 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result':
[        ] I/flutter (15824): is not true.
[        ] I/flutter (15824): 
[        ] I/flutter (15824): Either the assertion indicates an error in the framework itself, or we should provide substantially
[        ] I/flutter (15824): more information in this error message to help you determine and fix the underlying cause.
[        ] I/flutter (15824): In either case, please report this assertion by filing a bug on GitHub:
[        ] I/flutter (15824):   https://github.com/flutter/flutter/issues/new?template=BUG.md
[        ] I/flutter (15824): 
[        ] I/flutter (15824): When the exception was thrown, this was the stack:
[        ] I/flutter (15824): #2      _NestedOuterBallisticScrollActivity.applyMoveTo (package:flutter/src/widgets/nested_scroll_view.dart:1608:12)
[        ] I/flutter (15824): #3      BallisticScrollActivity._tick (package:flutter/src/widgets/scroll_activity.dart:545:10)
[        ] I/flutter (15824): #4      AnimationLocalListenersMixin.notifyListeners (package:flutter/src/animation/listener_helpers.dart:137:19)
[        ] I/flutter (15824): #5      AnimationController._tick (package:flutter/src/animation/animation_controller.dart:798:5)
[        ] I/flutter (15824): #6      Ticker._tick (package:flutter/src/scheduler/ticker.dart:240:12)
[        ] I/flutter (15824): #7      SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1117:15)
[        ] I/flutter (15824): #8      SchedulerBinding.handleBeginFrame.<anonymous closure> (package:flutter/src/scheduler/binding.dart:1032:11)
[        ] I/flutter (15824): #9      _LinkedHashMapMixin.forEach (dart:collection-patch/compact_hash.dart:377:8)
[        ] I/flutter (15824): #10     SchedulerBinding.handleBeginFrame (package:flutter/src/scheduler/binding.dart:1030:17)
[        ] I/flutter (15824): #11     SchedulerBinding._handleBeginFrame (package:flutter/src/scheduler/binding.dart:964:5)
[        ] I/flutter (15824): #15     _invoke1 (dart:ui/hooks.dart:267:10)
[        ] I/flutter (15824): #16     _beginFrame (dart:ui/hooks.dart:194:3)
[        ] I/flutter (15824): (elided 5 frames from class _AssertionError and dart:async)
[        ] I/flutter (15824): 
[        ] I/flutter (15824): The AnimationController notifying listeners was:
[        ] I/flutter (15824):   AnimationController#ab116(▶ 2161.804; for _NestedOuterBallisticScrollActivity)
[        ] I/flutter (15824): ════════════════════════════════════════════════════════════════════════════════════════════════════
[  +38 ms] I/flutter (15824): Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
[+3189 ms] I/chatty  (15824): uid=10283(com.example.nested_scroll_view) 1.ui identical 129 lines
[        ] I/flutter (15824): Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
[+245848 ms] W/FlutterEngine(15964): Tried to automatically register plugins with FlutterEngine (io.flutter.embedding.engine.FlutterEngine@7570b9b) but could not find and invoke the GeneratedPluginRegistrant.

  • Output of flutter analyze
❯ flutter analyze      
Analyzing nested_scroll_view...                                         
No issues found! (ran in 2.9s)
  • Output of flutter doctor -v
❯ flutter doctor -v
[✓] Flutter (Channel stable, 1.20.1, on Linux, locale en_US.UTF-8)
    • Flutter version 1.20.1 at /home/pablo/flutter
    • Framework revision 2ae34518b8 (9 days ago), 2020-08-05 19:53:19 -0700
    • Engine revision c8e3b94853
    • Dart version 2.9.0

 
[✓] Android toolchain - develop for Android devices (Android SDK version 29.0.3)
    • Android SDK at /home/pablo/Android/Sdk
    • Platform android-29, build-tools 29.0.3
    • ANDROID_HOME = /home/pablo/Android/Sdk
    • Java binary at: /usr/local/android-studio/jre/bin/java
    • Java version OpenJDK Runtime Environment (build 1.8.0_242-release-1644-b3-6222593)
    • All Android licenses accepted.

[!] Android Studio (version 4.0)
    • Android Studio at /usr/local/android-studio
    ✗ Flutter plugin not installed; this adds Flutter specific functionality.
    ✗ Dart plugin not installed; this adds Dart specific functionality.
    • Java version OpenJDK Runtime Environment (build 1.8.0_242-release-1644-b3-6222593)

[✓] VS Code (version 1.47.3)
    • VS Code at /usr/share/code
    • Flutter extension version 3.13.2

[✓] Connected device (1 available)
    • Mi A3 (mobile) • ce50806d386d • android-arm64 • Android 10 (API 29)

! Doctor found issues in 1 category.
  • I'm also pasting the full exception thrown in the debug console when I "Run and debug" this inside vscode
Launching lib/main.dart on Mi A3 in debug mode...
✓ Built build/app/outputs/flutter-apk/app-debug.apk.
Installing build/app/outputs/flutter-apk/app.apk...
Connecting to VM Service at ws://127.0.0.1:44887/pWyLqoYZwb4=/ws

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
�[38;5;244mThe following assertion was thrown while notifying listeners for AnimationController:�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.


�[38;5;248mEither 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=BUG.md
�[39;49m

�[38;5;244mWhen the exception was thrown, this was the stack�[39;49m
�[38;5;244m#2      _NestedOuterBallisticScrollActivity.applyMoveTo�[39;49m
�[38;5;244m#3      BallisticScrollActivity._tick�[39;49m
�[38;5;244m#4      AnimationLocalListenersMixin.notifyListeners�[39;49m
�[38;5;244m#5      AnimationController._tick�[39;49m
�[38;5;244m#6      Ticker._tick�[39;49m
�[38;5;244m...�[39;49m
�[38;5;244mThe AnimationController notifying listeners was: AnimationController#635dd(▶ 1851.346; for _NestedOuterBallisticScrollActivity)�[39;49m
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m
══╡ EXCEPTION CAUGHT BY ANIMATION LIBRARY ╞═════════════════════════════════════════════════════════
The following assertion was thrown while notifying listeners for AnimationController:
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result':
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=BUG.md
When the exception was thrown, this was the stack:
�[38;5;244m#2      _NestedOuterBallisticScrollActivity.applyMoveTo�[39;49m
�[38;5;244m#3      BallisticScrollActivity._tick�[39;49m
�[38;5;244m#4      AnimationLocalListenersMixin.notifyListeners�[39;49m
�[38;5;244m#5      AnimationController._tick�[39;49m
�[38;5;244m#6      Ticker._tick�[39;49m
�[38;5;244m#7      SchedulerBinding._invokeFrameCallback�[39;49m
�[38;5;244m#8      SchedulerBinding.handleBeginFrame.<anonymous closure>�[39;49m
�[38;5;244m#9      _LinkedHashMapMixin.forEach  (dart:collection-patch/compact_hash.dart:377:8)�[39;49m
�[38;5;244m#10     SchedulerBinding.handleBeginFrame�[39;49m
�[38;5;244m#11     SchedulerBinding._handleBeginFrame�[39;49m
�[38;5;244m#15     _invoke1  (dart:ui/hooks.dart:267:10)�[39;49m
�[38;5;244m#16     _beginFrame  (dart:ui/hooks.dart:194:3)�[39;49m
(elided 5 frames from class _AssertionError and dart:async)
The AnimationController notifying listeners was:
  AnimationController#635dd(▶ 1851.346; for _NestedOuterBallisticScrollActivity)
════════════════════════════════════════════════════════════════════════════════════════════════════
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
Another exception was thrown: 'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.

�[38;5;248m════════ Exception caught by animation library ═════════════════════════════════�[39;49m
'package:flutter/src/widgets/nested_scroll_view.dart': Failed assertion: line 1608 pos 12: 'result': is not true.
�[38;5;248m════════════════════════════════════════════════════════════════════════════════�[39;49m

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    f: scrollingViewports, list views, slivers, etc.found in release: 1.20Found to occur in 1.20frameworkflutter/packages/flutter repository. See also f: labels.has reproducible stepsThe issue has been confirmed reproducible and is ready to work onr: fixedIssue is closed as already fixed in a newer version

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