PageView with SelectionArea scrolls even with NeverScrollablePhysics and throws an Exception

(Similar to #136331)

Steps to reproduce

Create a SelectionArea
The child component must be a PageView, physics: NeverScrollableScrollPhysics
Inside the PageView add at least two other widgets
The best way to reproduce the exception is to use a DataTable for the first widget (see code snippet). It could also be reproduced without, but then sporadically, in this case I could not recognize a pattern.
(The bug that despite the NeverScrollableScrollPhysics the page can be scrolled by selecting and dragging is almost always possible (see video))
Only valid for the code example: Select something in the DataTable and drag it outside the browser window. The PageView will now move to the next page. Release the mouse pointer outside the browser window, hover over the TextWidget on Page2 and select it. Now the error should be thrown.
Additional information: In another code, the error was already thrown as soon as the mouse pointer went beyond the browser window. So I didn't have to select something from page 2 first. Unfortunately I can't reproduce this behavior well because it is a very large project.

Expected results

If the scroll physics is set to NeverScrollableScrollPhysics, the PageView should not be navigable by drag and pull.
No exception should be thrown.

Actual results

Despite the fact that the scroll physics is set to NeverScrollableScrollPhysics, the PageView can be navigated by drag and pull.
The same exception is thrown again and again.

Code sample

https://gist.github.com/MeatCheatDev/2afc5b9cf66a7cc471327983c86150ac

Screenshots or Video

Screenshots / Video demonstration

[Upload media here]

2023-12-27.12-09-09.mp4

Logs

Error: Assertion failed: file:///D:/Installationsdatei/flutter/packages/flutter/lib/src/widgets/scrollable_helpers.dart:237:7
globalRect.size.width >= _dragTargetRelatedToScrollOrigin.size.width &&

        globalRect.size.height >= _dragTargetRelatedToScrollOrigin.size.height
"Drag target size is larger than scrollable size, which may cause bouncing"
dart-sdk/lib/_internal/js_dev_runtime/private/ddc_runtime/errors.dart 294:3       throw_
dart-sdk/lib/_internal/js_dev_runtime/private/ddc_runtime/errors.dart 35:3        assertFailed
packages/flutter/src/widgets/scrollable_helpers.dart 238:73                       _scroll
dart-sdk/lib/_internal/js_dev_runtime/patch/async_patch.dart 84:54                runBody
dart-sdk/lib/_internal/js_dev_runtime/patch/async_patch.dart 127:5                _async
packages/flutter/src/widgets/scrollable_helpers.dart 230:23                       [_scroll]
packages/flutter/src/widgets/scrollable_helpers.dart 222:5                        startAutoScrollIfNecessary
packages/flutter/src/widgets/scrollable.dart 1235:7                               handleSelectionEdgeUpdate
packages/flutter/src/widgets/selectable_region.dart 2298:18                       dispatchSelectionEvent
packages/flutter/src/widgets/selection_container.dart 183:19                      dispatchSelectionEvent
packages/flutter/src/widgets/scrollable.dart 1482:17                              ensureChildUpdated
packages/flutter/src/widgets/scrollable.dart 1442:9                               dispatchSelectionEventToChild
packages/flutter/src/widgets/selectable_region.dart 2461:33                       [_adjustSelection]
packages/flutter/src/widgets/selectable_region.dart 2281:85                       handleSelectionEdgeUpdate
packages/flutter/src/widgets/scrollable.dart 1225:42                              handleSelectionEdgeUpdate
packages/flutter/src/widgets/selectable_region.dart 2298:18                       dispatchSelectionEvent
packages/flutter/src/widgets/selection_container.dart 183:19                      dispatchSelectionEvent
packages/flutter/src/widgets/selectable_region.dart 2346:22                       dispatchSelectionEventToChild
packages/flutter/src/widgets/selectable_region.dart 1576:18                       dispatchSelectionEventToChild
packages/flutter/src/widgets/selectable_region.dart 2461:33                       [_adjustSelection]
packages/flutter/src/widgets/selectable_region.dart 2281:85                       handleSelectionEdgeUpdate
packages/flutter/src/widgets/selectable_region.dart 1545:18                       handleSelectionEdgeUpdate
packages/flutter/src/widgets/selectable_region.dart 2298:18                       dispatchSelectionEvent
packages/flutter/src/widgets/selection_container.dart 183:19                      dispatchSelectionEvent
packages/flutter/src/widgets/selectable_region.dart 1002:20                       [_selectStartTo]
packages/flutter/src/widgets/selectable_region.dart 1021:5                        [_collapseSelectionAt]
packages/flutter/src/widgets/selectable_region.dart 512:13                        [_startNewMouseSelectionGesture]
packages/flutter/src/gestures/tap_and_drag.dart 1179:41                           <fn>
packages/flutter/src/gestures/recognizer.dart 275:24                              invokeCallback
packages/flutter/src/gestures/tap_and_drag.dart 1179:7                            [_checkTapDown]
packages/flutter/src/gestures/tap_and_drag.dart 982:7                             acceptGesture
packages/flutter/src/gestures/arena.dart 281:11                                   [_resolveInFavorOf]
packages/flutter/src/gestures/arena.dart 239:9                                    [_resolve]
packages/flutter/src/gestures/arena.dart 53:5                                     resolve
packages/flutter/src/gestures/recognizer.dart 375:12                              resolve
packages/flutter/src/gestures/tap_and_drag.dart 1161:9                            [_checkDrag]
packages/flutter/src/gestures/tap_and_drag.dart 1074:11                           handleEvent
packages/flutter/src/gestures/pointer_router.dart 98:7                            [_dispatch]
packages/flutter/src/gestures/pointer_router.dart 143:9                           <fn>
dart-sdk/lib/_internal/js_dev_runtime/private/linked_hash_map.dart 21:7           forEach
packages/flutter/src/gestures/pointer_router.dart 141:17                          [_dispatchEventToRoutes]
packages/flutter/src/gestures/pointer_router.dart 127:7                           route
packages/flutter/src/gestures/binding.dart 488:5                                  handleEvent
packages/flutter/src/gestures/binding.dart 468:14                                 dispatchEvent
packages/flutter/src/rendering/binding.dart 439:11                                dispatchEvent
packages/flutter/src/gestures/binding.dart 413:7                                  [_handlePointerEventImmediately]
packages/flutter/src/gestures/binding.dart 376:5                                  handlePointerEvent
packages/flutter/src/gestures/binding.dart 323:7                                  [_flushPointerEventQueue]
packages/flutter/src/gestures/binding.dart 292:9                                  [_handlePointerDataPacket]
lib/_engine/engine/platform_dispatcher.dart 1289:5                                invoke1
lib/_engine/engine/platform_dispatcher.dart 273:5                                 invokeOnPointerDataPacket
lib/_engine/engine/pointer_binding.dart 168:30                                    [_onPointerData]
lib/_engine/engine/pointer_binding.dart 768:16                                    <fn>
lib/_engine/engine/pointer_binding.dart 720:7                                     <fn>
lib/_engine/engine/pointer_binding.dart 317:9                                     loggedHandler
dart-sdk/lib/_internal/js_dev_runtime/private/ddc_runtime/operations.dart 574:37  _checkAndCall
dart-sdk/lib/_internal/js_dev_runtime/private/ddc_runtime/operations.dart 579:39  dcall

Flutter Doctor output

Doctor output

Doctor summary (to see all details, run flutter doctor -v):
[√] Flutter (Channel stable, 3.16.5, on Microsoft Windows [Version 10.0.22621.2861], locale de-DE)
[√] Windows Version (Installed version of Windows is version 10 or higher)
[!] Android toolchain - develop for Android devices (Android SDK version 33.0.2)
    X cmdline-tools component is missing
      Run `path/to/sdkmanager --install "cmdline-tools;latest"`
      See https://developer.android.com/studio/command-line for more details.
    X Android license status unknown.
      Run `flutter doctor --android-licenses` to accept the SDK licenses.
      See https://flutter.dev/docs/get-started/install/windows#android-setup for more details.
[√] Chrome - develop for the web
[!] Visual Studio - develop Windows apps (Visual Studio Community 2022 17.8.3)
    X Visual Studio is missing necessary components. Please re-run the Visual Studio installer for the "Desktop development with C++" workload, and include these components:
        MSVC v142 - VS 2019 C++ x64/x86 build tools
         - If there are multiple build tool versions available, install the latest
        C++ CMake tools for Windows
        Windows 10 SDK
[√] Android Studio (version 2022.1)
[√] IntelliJ IDEA Community Edition (version 2023.3)
[√] IntelliJ IDEA Ultimate Edition (version 2023.3)
[√] Connected device (3 available)
[√] Network resources

! Doctor found issues in 2 categories.

Reproducible using the code sample provided. (Pasted below for easy access). This is not only on flutter web, it reproduced on macOS as well.

code sample

import 'package:flutter/material.dart';

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

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

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

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

  @override
  State<PageViewBug> createState() => _PageViewBugState();
}

class _PageViewBugState extends State<PageViewBug> {
  final PageController controllerH = PageController();

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: const SelectionArea(child: Text('PageViewBug'))),
      body: SelectionArea(
        child: PageView(
            controller: controllerH,
            physics: const NeverScrollableScrollPhysics(), //!!!!
            scrollDirection: Axis.horizontal,
            children: [
              Widget1(controllerH: controllerH),
              Widget2(controllerH: controllerH),
              const Center(
                child: Text("Page2"),
              ),
            ]),
      ),
    );
  }
}

class Widget1 extends StatefulWidget {
  const Widget1({super.key, required this.controllerH});

  final PageController controllerH;

  @override
  State<Widget1> createState() => _Widget1State();
}

class _Widget1State extends State<Widget1> {
  @override
  Widget build(BuildContext context) {
    return Stack(
      children: [
        Align(
          alignment: Alignment.center,
          child: Padding(
            padding: const EdgeInsets.only(left: 10, right: 10),
            child: SingleChildScrollView(
              scrollDirection: Axis.horizontal,
              child: SizedBox(
                  height: MediaQuery.of(context).size.height * 0.3,
                  width: MediaQuery.of(context).size.width * 0.6,
                  child: DataTable(
                    dividerThickness: 0,
                    columns: const [
                      DataColumn(
                          label: Text(
                        'Title',
                        style: (TextStyle(
                          fontSize: 22,
                        )),
                      )),
                      DataColumn(
                          label: Text('Placeholder',
                              style: (TextStyle(
                                fontSize: 22,
                              )))),
                      DataColumn(
                          label: Text('Pklace',
                              style: (TextStyle(
                                fontSize: 22,
                              )))),
                      DataColumn(
                          label: Text('Placeholder',
                              style: (TextStyle(
                                fontSize: 22,
                              )))),
                    ],
                    rows: [DataRow(cells: List.filled(4, const DataCell(Text("Test"))))],
                  )),
            ),
          ),
        ),
        Align(
          alignment: Alignment.centerRight,
          child: Padding(
            padding: const EdgeInsets.only(right: 26.0),
            child: IconButton(
              tooltip: "Next",
              onPressed: () {
                widget.controllerH.nextPage(duration: const Duration(milliseconds: 500), curve: Curves.easeIn);
              },
              icon: ShaderMask(
                shaderCallback: (Rect bounds) {
                  return LinearGradient(
                    begin: Alignment.centerLeft,
                    end: Alignment.centerRight,
                    colors: [
                      Theme.of(context).colorScheme.primary,
                      Theme.of(context).colorScheme.secondary,
                    ],
                  ).createShader(bounds);
                },
                child: const Icon(
                  Icons.arrow_circle_right,
                  size: 72,
                ),
              ),
            ),
          ),
        ),
      ],
    );
  }
}

class Widget2 extends StatefulWidget {
  const Widget2({super.key, required this.controllerH});

  final PageController controllerH;

  @override
  State<Widget2> createState() => _Widget2State();
}

class _Widget2State extends State<Widget2> {
  @override
  Widget build(BuildContext context) {
    return Stack(
      children: [
        Align(
          alignment: Alignment.centerLeft,
          child: Padding(
            padding: const EdgeInsets.only(right: 26.0),
            child: IconButton(
              tooltip: "Back",
              onPressed: () {
                widget.controllerH.previousPage(duration: const Duration(milliseconds: 500), curve: Curves.easeIn);
              },
              icon: ShaderMask(
                shaderCallback: (Rect bounds) {
                  return LinearGradient(
                    begin: Alignment.centerLeft,
                    end: Alignment.centerRight,
                    colors: [
                      Theme.of(context).colorScheme.primary,
                      Theme.of(context).colorScheme.secondary,
                    ],
                  ).createShader(bounds);
                },
                child: const Icon(
                  Icons.arrow_circle_right,
                  size: 72,
                ),
              ),
            ),
          ),
        ),
        const Align(
          alignment: Alignment.center,
          child: Text("Widget1"),
        ),
        Align(
          alignment: Alignment.centerRight,
          child: Padding(
            padding: const EdgeInsets.only(right: 26.0),
            child: IconButton(
              tooltip: "Next",
              onPressed: () {
                widget.controllerH.nextPage(duration: const Duration(milliseconds: 500), curve: Curves.easeIn);
              },
              icon: ShaderMask(
                shaderCallback: (Rect bounds) {
                  return LinearGradient(
                    begin: Alignment.centerLeft,
                    end: Alignment.centerRight,
                    colors: [
                      Theme.of(context).colorScheme.primary,
                      Theme.of(context).colorScheme.secondary,
                    ],
                  ).createShader(bounds);
                },
                child: const Icon(
                  Icons.arrow_circle_right,
                  size: 72,
                ),
              ),
            ),
          ),
        ),
      ],
    );
  }
}

flutter doctor -v

[!] Flutter (Channel stable, 3.16.5, on macOS 14.1.2 23B92 darwin-arm64, locale en-GB)
    • Flutter version 3.16.5 on channel stable at /Users/nexus/dev/sdks/flutter
    ! Warning: `flutter` on your path resolves to /Users/nexus/dev/sdks/flutters/bin/flutter, which is not inside your current Flutter SDK checkout at /Users/nexus/dev/sdks/flutter. Consider adding /Users/nexus/dev/sdks/flutter/bin to the front of your path.
    ! Warning: `dart` on your path resolves to /Users/nexus/dev/sdks/flutters/bin/dart, which is not inside your current Flutter SDK checkout at /Users/nexus/dev/sdks/flutter. Consider adding /Users/nexus/dev/sdks/flutter/bin to the front of your path.
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision 78666c8dc5 (9 days ago), 2023-12-19 16:14:14 -0800
    • Engine revision 3f3e560236
    • Dart version 3.2.3
    • DevTools version 2.28.4
    • If those were intentional, you can disregard the above warnings; however it is recommended to use "git" directly to perform update checks and upgrades.

[✓] Android toolchain - develop for Android devices (Android SDK version 34.0.0-rc1)
    • Android SDK at /Users/nexus/Library/Android/sdk
    • Platform android-34, build-tools 34.0.0-rc1
    • Java binary at: /Users/nexus/Applications/Android Studio.app/Contents/jbr/Contents/Home/bin/java
    • Java version OpenJDK Runtime Environment (build 17.0.6+0-17.0.6b829.9-10027231)
    • All Android licenses accepted.

[✓] Xcode - develop for iOS and macOS (Xcode 15.0)
    • Xcode at /Applications/Xcode-15.0.0-Release.Candidate.app/Contents/Developer
    • Build 15A240d
    • CocoaPods version 1.13.0

[✓] Chrome - develop for the web
    • Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome

[✓] Android Studio (version 2022.3)
    • Android Studio at /Users/nexus/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 17.0.6+0-17.0.6b829.9-10027231)

[✓] IntelliJ IDEA Ultimate Edition (version 2023.2.5)
    • IntelliJ at /Users/nexus/Applications/IntelliJ IDEA Ultimate.app
    • Flutter plugin version 76.3.4
    • Dart plugin version 232.10072.19

[✓] VS Code (version 1.85.1)
    • VS Code at /Applications/Visual Studio Code.app/Contents
    • Flutter extension version 3.80.0

[✓] Connected device (4 available)
    • Nexus (mobile)       • 00008020-001875E83A38002E • ios            • iOS 17.2.1 21C66
    • Dean’s iPad (mobile) • 00008103-000825C811E3401E • ios            • iOS 17.2 21C62
    • macOS (desktop)      • macos                     • darwin-arm64   • macOS 14.1.2 23B92 darwin-arm64
    • Chrome (web)         • chrome                    • web-javascript • Google Chrome 120.0.6099.129

[✓] Network resources
    • All expected network resources are available.

! Doctor found issues in 1 category.

[✓] Flutter (Channel master, 3.18.0-18.0.pre.39, on macOS 14.1.2 23B92 darwin-arm64, locale en-GB)
    • Flutter version 3.18.0-18.0.pre.39 on channel master at /Users/nexus/dev/sdks/flutters
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision b0b0e423d6 (11 hours ago), 2023-12-28 09:38:38 +0800
    • Engine revision afd214dccc
    • Dart version 3.3.0 (build 3.3.0-264.0.dev)
    • DevTools version 2.31.0-dev.0

[✓] Android toolchain - develop for Android devices (Android SDK version 34.0.0-rc1)
    • Android SDK at /Users/nexus/Library/Android/sdk
    • Platform android-34, build-tools 34.0.0-rc1
    • Java binary at: /Users/nexus/Applications/Android Studio.app/Contents/jbr/Contents/Home/bin/java
    • Java version OpenJDK Runtime Environment (build 17.0.6+0-17.0.6b829.9-10027231)
    • All Android licenses accepted.

[✓] Xcode - develop for iOS and macOS (Xcode 15.0)
    • Xcode at /Applications/Xcode-15.0.0-Release.Candidate.app/Contents/Developer
    • Build 15A240d
    • CocoaPods version 1.13.0

[✓] Chrome - develop for the web
    • Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome

[✓] Android Studio (version 2022.3)
    • Android Studio at /Users/nexus/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 17.0.6+0-17.0.6b829.9-10027231)

[✓] IntelliJ IDEA Ultimate Edition (version 2023.2.5)
    • IntelliJ at /Users/nexus/Applications/IntelliJ IDEA Ultimate.app
    • Flutter plugin version 76.3.4
    • Dart plugin version 232.10072.19

[✓] VS Code (version 1.85.1)
    • VS Code at /Applications/Visual Studio Code.app/Contents
    • Flutter extension version 3.80.0

[✓] Connected device (4 available)
    • Nexus (mobile)       • 00008020-001875E83A38002E • ios            • iOS 17.2.1 21C66
    • Dean’s iPad (mobile) • 00008103-000825C811E3401E • ios            • iOS 17.2 21C62
    • macOS (desktop)      • macos                     • darwin-arm64   • macOS 14.1.2 23B92 darwin-arm64
    • Chrome (web)         • chrome                    • web-javascript • Google Chrome 120.0.6099.129

[✓] Network resources
    • All expected network resources are available.

• No issues found!

Logs

DartError: Assertion failed: file:///C:/Users/mathe/Documents/dev/flutter%20sdk/flutter/packages/flutter/lib/src/widgets/scrollable_helpers.dart:233:7
globalRect.size.width >= _dragTargetRelatedToScrollOrigin.size.width &&

        globalRect.size.height >= _dragTargetRelatedToScrollOrigin.size.height
"Drag target size is larger than scrollable size, which may cause bouncing"
dart-sdk/lib/_internal/js_dev_runtime/private/ddc_runtime/errors.dart 296:3     throw_
dart-sdk/lib/_internal/js_dev_runtime/private/ddc_runtime/errors.dart 29:3      assertFailed
packages/flutter/src/widgets/scrollable_helpers.dart 234:73                     _scroll
dart-sdk/lib/_internal/js_dev_runtime/patch/async_patch.dart 84:54              runBody
dart-sdk/lib/_internal/js_dev_runtime/patch/async_patch.dart 127:5              _async
packages/flutter/src/widgets/scrollable_helpers.dart 226:23                     [_scroll]
packages/flutter/src/widgets/scrollable_helpers.dart 218:5                      startAutoScrollIfNecessary
packages/flutter/src/widgets/scrollable.dart 1245:7                             handleSelectionEdgeUpdate
packages/flutter/src/widgets/selectable_region.dart 2652:18                     dispatchSelectionEvent
packages/flutter/src/widgets/selection_container.dart 183:19                    dispatchSelectionEvent
packages/flutter/src/widgets/selectable_region.dart 2703:22                     dispatchSelectionEventToChild
packages/flutter/src/widgets/scrollable.dart 1470:18                            dispatchSelectionEventToChild
packages/flutter/src/widgets/selectable_region.dart 2818:33                     [_adjustSelection]
packages/flutter/src/widgets/selectable_region.dart 2633:84                     handleSelectionEdgeUpdate
packages/flutter/src/widgets/scrollable.dart 1235:42                            handleSelectionEdgeUpdate
packages/flutter/src/widgets/selectable_region.dart 2652:18                     dispatchSelectionEvent
packages/flutter/src/widgets/selection_container.dart 183:19                    dispatchSelectionEvent
packages/flutter/src/widgets/selectable_region.dart 2703:22                     dispatchSelectionEventToChild
packages/flutter/src/widgets/scrollable.dart 1470:18                            dispatchSelectionEventToChild
packages/flutter/src/widgets/selectable_region.dart 2818:33                     [_adjustSelection]
packages/flutter/src/widgets/selectable_region.dart 2633:84                     handleSelectionEdgeUpdate
packages/flutter/src/widgets/scrollable.dart 1235:42                            handleSelectionEdgeUpdate
packages/flutter/src/widgets/selectable_region.dart 2652:18                     dispatchSelectionEvent
packages/flutter/src/widgets/selection_container.dart 183:19                    dispatchSelectionEvent
packages/flutter/src/widgets/selectable_region.dart 2703:22                     dispatchSelectionEventToChild
packages/flutter/src/widgets/selectable_region.dart 1914:18                     dispatchSelectionEventToChild
packages/flutter/src/widgets/selectable_region.dart 2818:33                     [_adjustSelection]
packages/flutter/src/widgets/selectable_region.dart 2633:84                     handleSelectionEdgeUpdate
packages/flutter/src/widgets/selectable_region.dart 1882:18                     handleSelectionEdgeUpdate
packages/flutter/src/widgets/selectable_region.dart 2652:18                     dispatchSelectionEvent
packages/flutter/src/widgets/selection_container.dart 183:19                    dispatchSelectionEvent
packages/flutter/src/widgets/selectable_region.dart 915:22                      [_triggerSelectionEndEdgeUpdate]
packages/flutter/src/widgets/selectable_region.dart 1212:7                      [_selectEndTo]
packages/flutter/src/widgets/selectable_region.dart 703:13                      [_handleMouseDragUpdate]
packages/flutter/src/gestures/tap_and_drag.dart 1276:52                         <fn>
packages/flutter/src/gestures/recognizer.dart 351:24                            invokeCallback
packages/flutter/src/gestures/tap_and_drag.dart 1276:9                          [_checkDragUpdate]
packages/flutter/src/gestures/tap_and_drag.dart 1099:9                          handleEvent
packages/flutter/src/gestures/pointer_router.dart 98:7                          [_dispatch]
packages/flutter/src/gestures/pointer_router.dart 143:9                         <fn>
dart-sdk/lib/_internal/js_dev_runtime/private/linked_hash_map.dart 21:7         forEach
packages/flutter/src/gestures/pointer_router.dart 141:17                        [_dispatchEventToRoutes]
packages/flutter/src/gestures/pointer_router.dart 127:7                         route
packages/flutter/src/gestures/binding.dart 501:5                                handleEvent
packages/flutter/src/gestures/binding.dart 481:14                               dispatchEvent
packages/flutter/src/rendering/binding.dart 450:11                              dispatchEvent
packages/flutter/src/gestures/binding.dart 426:7                                [_handlePointerEventImmediately]
packages/flutter/src/gestures/binding.dart 389:5                                handlePointerEvent
packages/flutter/src/gestures/binding.dart 336:7                                [_flushPointerEventQueue]
packages/flutter/src/gestures/binding.dart 305:9                                [_handlePointerDataPacket]
lib/_engine/engine/platform_dispatcher.dart 1423:5                              invoke1
lib/_engine/engine/platform_dispatcher.dart 336:5                               invokeOnPointerDataPacket
lib/_engine/engine/pointer_binding.dart 405:30                                  [_sendToFramework]
lib/_engine/engine/pointer_binding.dart 225:7                                   onPointerData
lib/_engine/engine/pointer_binding.dart 1012:16                                 <fn>
lib/_engine/engine/pointer_binding.dart 948:7                                   <fn>
lib/_engine/engine/pointer_binding.dart 541:9                                   loggedHandler
dart-sdk/lib/_internal/js_dev_runtime/patch/js_allow_interop_patch.dart 188:27  _callDartFunctionFast1
DartError: Assertion failed: file:///C:/Users/mathe/Documents/dev/flutter%20sdk/flutter/packages/flutter/lib/src/widgets/scrollable_helpers.dart:233:7
globalRect.size.width >= _dragTargetRelatedToScrollOrigin.size.width &&

        globalRect.size.height >= _dragTargetRelatedToScrollOrigin.size.height
"Drag target size is larger than scrollable size, which may cause bouncing"
dart-sdk/lib/_internal/js_dev_runtime/private/ddc_runtime/errors.dart 296:3     throw_
dart-sdk/lib/_internal/js_dev_runtime/private/ddc_runtime/errors.dart 29:3      assertFailed
packages/flutter/src/widgets/scrollable_helpers.dart 234:73                     _scroll
dart-sdk/lib/_internal/js_dev_runtime/patch/async_patch.dart 84:54              runBody
dart-sdk/lib/_internal/js_dev_runtime/patch/async_patch.dart 127:5              _async
packages/flutter/src/widgets/scrollable_helpers.dart 226:23                     [_scroll]
packages/flutter/src/widgets/scrollable_helpers.dart 218:5                      startAutoScrollIfNecessary
packages/flutter/src/widgets/scrollable.dart 1245:7                             handleSelectionEdgeUpdate
packages/flutter/src/widgets/selectable_region.dart 2652:18                     dispatchSelectionEvent
packages/flutter/src/widgets/selection_container.dart 183:19                    dispatchSelectionEvent
packages/flutter/src/widgets/selectable_region.dart 2703:22                     dispatchSelectionEventToChild
packages/flutter/src/widgets/scrollable.dart 1470:18                            dispatchSelectionEventToChild
packages/flutter/src/widgets/selectable_region.dart 2818:33                     [_adjustSelection]
packages/flutter/src/widgets/selectable_region.dart 2633:84                     handleSelectionEdgeUpdate
packages/flutter/src/widgets/scrollable.dart 1235:42                            handleSelectionEdgeUpdate
packages/flutter/src/widgets/selectable_region.dart 2652:18                     dispatchSelectionEvent
packages/flutter/src/widgets/selection_container.dart 183:19                    dispatchSelectionEvent
packages/flutter/src/widgets/selectable_region.dart 2703:22                     dispatchSelectionEventToChild
packages/flutter/src/widgets/scrollable.dart 1470:18                            dispatchSelectionEventToChild
packages/flutter/src/widgets/selectable_region.dart 2818:33                     [_adjustSelection]
packages/flutter/src/widgets/selectable_region.dart 2633:84                     handleSelectionEdgeUpdate
packages/flutter/src/widgets/scrollable.dart 1235:42                            handleSelectionEdgeUpdate
packages/flutter/src/widgets/selectable_region.dart 2652:18                     dispatchSelectionEvent
packages/flutter/src/widgets/selection_container.dart 183:19                    dispatchSelectionEvent
packages/flutter/src/widgets/selectable_region.dart 2703:22                     dispatchSelectionEventToChild
packages/flutter/src/widgets/selectable_region.dart 1914:18                     dispatchSelectionEventToChild
packages/flutter/src/widgets/selectable_region.dart 2818:33                     [_adjustSelection]
packages/flutter/src/widgets/selectable_region.dart 2633:84                     handleSelectionEdgeUpdate
packages/flutter/src/widgets/selectable_region.dart 1882:18                     handleSelectionEdgeUpdate
packages/flutter/src/widgets/selectable_region.dart 2652:18                     dispatchSelectionEvent
packages/flutter/src/widgets/selection_container.dart 183:19                    dispatchSelectionEvent
packages/flutter/src/widgets/selectable_region.dart 915:22                      [_triggerSelectionEndEdgeUpdate]
packages/flutter/src/widgets/selectable_region.dart 1212:7                      [_selectEndTo]
packages/flutter/src/widgets/selectable_region.dart 703:13                      [_handleMouseDragUpdate]
packages/flutter/src/gestures/tap_and_drag.dart 1276:52                         <fn>
packages/flutter/src/gestures/recognizer.dart 351:24                            invokeCallback
packages/flutter/src/gestures/tap_and_drag.dart 1276:9                          [_checkDragUpdate]
packages/flutter/src/gestures/tap_and_drag.dart 1099:9                          handleEvent
packages/flutter/src/gestures/pointer_router.dart 98:7                          [_dispatch]
packages/flutter/src/gestures/pointer_router.dart 143:9                         <fn>
dart-sdk/lib/_internal/js_dev_runtime/private/linked_hash_map.dart 21:7         forEach
packages/flutter/src/gestures/pointer_router.dart 141:17                        [_dispatchEventToRoutes]
packages/flutter/src/gestures/pointer_router.dart 127:7                         route
packages/flutter/src/gestures/binding.dart 501:5                                handleEvent
packages/flutter/src/gestures/binding.dart 481:14                               dispatchEvent
packages/flutter/src/rendering/binding.dart 450:11                              dispatchEvent
packages/flutter/src/gestures/binding.dart 426:7                                [_handlePointerEventImmediately]
packages/flutter/src/gestures/binding.dart 389:5                                handlePointerEvent
packages/flutter/src/gestures/binding.dart 336:7                                [_flushPointerEventQueue]
packages/flutter/src/gestures/binding.dart 305:9                                [_handlePointerDataPacket]
lib/_engine/engine/platform_dispatcher.dart 1423:5                              invoke1
lib/_engine/engine/platform_dispatcher.dart 336:5                               invokeOnPointerDataPacket
lib/_engine/engine/pointer_binding.dart 405:30                                  [_sendToFramework]
lib/_engine/engine/pointer_binding.dart 225:7                                   onPointerData
lib/_engine/engine/pointer_binding.dart 1012:16                                 <fn>
lib/_engine/engine/pointer_binding.dart 948:7                                   <fn>
lib/_engine/engine/pointer_binding.dart 541:9                                   loggedHandler
dart-sdk/lib/_internal/js_dev_runtime/patch/js_allow_interop_patch.dart 188:27  _callDartFunctionFast1

Flutter doctor -v

 flutter doctor -v
[√] Flutter (Channel stable, 3.24.4, on Microsoft Windows [versÆo 10.0.26100.2454], locale pt-BR)
    • Flutter version 3.24.4 on channel stable at C:\Users\mathe\Documents\dev\flutter sdk\flutter
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision 603104015d (5 weeks ago), 2024-10-24 08:01:25 -0700
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[√] Windows Version (Installed version of Windows is version 10 or higher)

[√] Android toolchain - develop for Android devices (Android SDK version 35.0.0)
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    • Platform android-35, build-tools 35.0.0
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    • Java version OpenJDK Runtime Environment (build 21.0.3+-12282718-b509.11)
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[√] Visual Studio - develop Windows apps (Visual Studio Community 2022 17.7.6)
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    • Visual Studio Community 2022 version 17.7.34221.43
    • Windows 10 SDK version 10.0.22621.0

[√] Android Studio (version 2024.2)
    • Android Studio at C:\Program Files\Android\Android Studio
    • 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 21.0.3+-12282718-b509.11)

[√] VS Code (version 1.95.3)
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    • Flutter extension version 3.100.0

[√] Connected device (3 available)
    • Windows (desktop) • windows • windows-x64    • Microsoft Windows [versÆo 10.0.26100.2454]
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    • Edge (web)        • edge    • web-javascript • Microsoft Edge 131.0.2903.70

[√] Network resources
    • All expected network resources are available.

• No issues found!

From my investigation part of the issue here is that EdgeDraggingAutoScroller used by Scrollable's selection delegate for edge scrolling does not consider the Scrollable's scroll physics so it always scrolls even when explicitly setting never scrollable physics, similarly I also do not think it respects the ScrollBehavior (members such as dragDevices). EdgeDraggingAutoScroller should consider this information from the scrollable it is attached to fix this issue.

The specific assertion being hit was introduced in #112816.

I'm not actively working on this but hope this information is helpful. Also happy to review any pull requests fixing this.

Make EdgeDraggingAutoScroller respect ScrollPhysics (flutter#186541)

This thread has been automatically locked since there has not been any recent activity after it was closed. If you are still experiencing a similar issue, please open a new bug, including the output of flutter doctor -v and a minimal reproduction of the issue.

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`PageView` with `SelectionArea` scrolls even with `NeverScrollablePhysics` and throws an Exception #140654

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PageView with SelectionArea scrolls even with NeverScrollablePhysics and throws an Exception #140654

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danagbemava-nc commented on Dec 28, 2023

matheust3 commented on Nov 28, 2024

1 remaining item

Renzo-Olivares commented on Feb 4, 2026

github-actions commented on Jul 14, 2026

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`PageView` with `SelectionArea` scrolls even with `NeverScrollablePhysics` and throws an Exception #140654