scrollable_positioned_list stopped worked after flutter 1.22 upgrade #183

bachras · 2020-10-06T14:48:13Z

Problem description

scrollable_positioned_list stopped worked after flutter 1.22 upgrade.

Steps to reproduce

Build demo app
Copy scrollable_positioned_list example code https://pub.dev/packages/scrollable_positioned_list/example
Run the app

Expected behavior

Working scrollable positioned list.

Actual behavior

Exception thrown

I/flutter (15302): ══╡ EXCEPTION CAUGHT BY SCHEDULER LIBRARY ╞═════════════════════════════════════════════════════════
I/flutter (15302): The following NoSuchMethodError was thrown during a scheduler callback:
I/flutter (15302): The method 'toDouble' was called on null.
I/flutter (15302): Receiver: null
I/flutter (15302): Tried calling: toDouble()
I/flutter (15302):
I/flutter (15302): When the exception was thrown, this was the stack:
I/flutter (15302): #0      Object.noSuchMethod  (dart:core-patch/object_patch.dart:51:5))
I/flutter (15302): #1      int./  (dart:core-patch/integers.dart:28:36))
I/flutter (15302): #2      _PositionedListState._schedulePositionNotificationUpdate.<anonymous closure> 
package:scrollable_positioned_list/src/positioned_list.dart:321
I/flutter (15302): #3      SchedulerBinding._invokeFrameCallback 
package:flutter/…/scheduler/binding.dart:1117
I/flutter (15302): #4      SchedulerBinding.handleDrawFrame 
package:flutter/…/scheduler/binding.dart:1063
I/flutter (15302): #5      SchedulerBinding.scheduleWarmUpFrame.<anonymous closure> 
package:flutter/…/scheduler/binding.dart:864
I/flutter (15302): (elided 11 frames from class _RawReceivePortImpl, class _Timer, dart:async, and dart:async-patch)
I/flutter (15302): ════════════════════════════════════════════════════════════════════════════════════════════════════
I/flutter (15302): Loaded flutter-ffmpeg-android-x86.
I/flutter (15302): Another exception was thrown: NoSuchMethodError: The method 'toDouble' was called on null.

Environment

Android
Flutter doctor summary:
flutter doctor -v
[✓] Flutter (Channel stable, 1.22.0, on Mac OS X 10.15.6 19G2021, locale en-GB)
• Flutter version 1.22.0 at /Users/art/Development/flutter
• Framework revision d408d302e2 (7 days ago), 2020-09-29 11:49:17 -0700
• Engine revision 5babba6c4d
• Dart version 2.10.0

[✓] Android toolchain - develop for Android devices (Android SDK version 28.0.3)
• Android SDK at /usr/local/Caskroom/android-sdk/25.2.3
• Platform android-29, build-tools 28.0.3
• ANDROID_HOME = /usr/local/Caskroom/android-sdk/25.2.3
• Java binary at: /Applications/Android Studio.app/Contents/jre/jdk/Contents/Home/bin/java
• Java version OpenJDK Runtime Environment (build 1.8.0_202-release-1483-b49-5587405)
• All Android licenses accepted.

[✓] Xcode - develop for iOS and macOS (Xcode 12.0)
• Xcode at /Applications/Xcode.app/Contents/Developer
• Xcode 12.0, Build version 12A7209
• CocoaPods version 1.9.3

[✓] Android Studio (version 3.5)
• Android Studio at /Applications/Android Studio.app/Contents
• Flutter plugin version 44.0.1
• Dart plugin version 191.8593
• Java version OpenJDK Runtime Environment (build 1.8.0_202-release-1483-b49-5587405)

[✓] VS Code (version 1.49.2)
• VS Code at /Applications/Visual Studio Code.app/Contents
• Flutter extension version 3.15.0

[✓] Connected device (1 available)
• Android SDK built for x86 (mobile) • emulator-5554 • android-x86 • Android 9 (API 28) (emulator)

• No issues found!

The text was updated successfully, but these errors were encountered:

Mehedi50200 · 2020-10-06T17:53:58Z

I am having the same issue after the upgrade. This issue was also there before but if I remember correctly there was a quick fix last time. Now it is back again.

Flutter 1.22.0 • channel stable • https://github.com/flutter/flutter.git
Framework • revision d408d302e2 (7 days ago) • 2020-09-29 11:49:17 -0700
Engine • revision 5babba6c4d
Tools • Dart 2.10.0

Exception thrown

E/flutter (11873): [ERROR:flutter/lib/ui/ui_dart_state.cc(177)] Unhandled Exception: NoSuchMethodError: The method '_mulFromInteger' was called on null.
E/flutter (11873): Receiver: null
E/flutter (11873): Tried calling: _mulFromInteger(2)
E/flutter (11873): #0 Object.noSuchMethod (dart:core-patch/object_patch.dart:51:5)
E/flutter (11873): #1 int.* (dart:core-patch/integers.dart:16:38)
E/flutter (11873): #2 _ScrollablePositionedListState._startScroll (package:flutter_widgets/src/scrollable_positioned_list/src/scrollable_positioned_list.dart:356:45)
E/flutter (11873): #3 _ScrollablePositionedListState._scrollTo (package:flutter_widgets/src/scrollable_positioned_list/src/scrollable_positioned_list.dart:341:13)
E/flutter (11873): #4 ItemScrollController.scrollTo (package:flutter_widgets/src/scrollable_positioned_list/src/scrollable_positioned_list.dart:181:33)

haroonkhan335 · 2020-10-07T18:44:04Z

same issue is happening for me as well..

tarobins · 2020-10-07T20:54:07Z

looking...

tarobins · 2020-10-07T22:32:35Z

I haven't been able to repo.

With this project https://github.com/tarobins/spl_example_wrapper I was able to get it to run on

[✓] Flutter (Channel stable, 1.22.0, on Mac OS X 10.15.6 19G2021, locale en-US)

See image

Can someone maybe post a repo where the example doesn't work that I can clone and see if there's something slightly different?

Mehedi50200 · 2020-10-07T23:49:18Z

Hi Thank you for your quick response..
I created a basic app for this purpose but apparently having the same error.

MINIMAL CODE FOR REPRODUCE
https://github.com/Mehedi50200/sp_example.git

Version
Flutter 1.22.0 • channel stable • https://github.com/flutter/flutter.git
Framework • revision d408d302e2 (8 days ago) • 2020-09-29 11:49:17 -0700
Engine • revision 5babba6c4d
Tools • Dart 2.10.0

Doctor summary (to see all details, run flutter doctor -v):
[√] Flutter (Channel stable, 1.22.0, on Microsoft Windows [Version 10.0.18363.1082], locale en-MY)
[√] Android toolchain - develop for Android devices (Android SDK version 30.0.1)
[√] Android Studio (version 4.0)
[√] VS Code (version 1.49.3)
[√] Connected device (2 available)

• No issues found!

tarobins · 2020-10-08T00:49:11Z

I got the exception with the above example. will take a look. thanks

a-v-ebrahimi · 2020-10-08T08:46:00Z

Thanks, looking forward to the fix, one of my products stopped functioning because of this problem.

haroonkhan335 · 2020-10-08T09:29:17Z

Thanks, looking forward to the fix, one of my products stopped functioning because of this problem.

Yup.. for me as well... Looking forward to get it fixed soon :)

tarobins · 2020-10-08T14:18:48Z

I was able to fix the example @Mehedi50200 gave with tarobins/sp_example@41ab3fa (ignore the pubspec.lock changes: after making the other changes and running flutter pub get, the lock file should update).

Basically I switched from the old mono-package flutter_widgets to the new scrollable_positioned_list package. If you need other widgets from flutter_widgets, the new packages can be found listed at the top of https://pub.dev/packages/flutter_widgets.

If anyone is indeed using the scrollable_positioned_list package, and the latest version thereof, and still running into issues, please let me know.

tarobins · 2020-10-08T14:39:39Z

Thanks @Mehedi50200 for the example repo. Would have been very hard to figure out the issue (if that is indeed the only issue) without the example.

Mehedi50200 · 2020-10-08T15:20:49Z

Thanks @Mehedi50200 for the example repo. Would have been very hard to figure out the issue (if that is indeed the only issue) without the example.

thank you a lot for the quick fix. you are great !!. i already tested on my production application with scrollable_positioned_list pack. worked like a charm. i did not use any other widget from flutter_widgets so cannot be sure if that is the only one.
Thanks again for the quick fix otherwise i would have to push back the production. <3

bachras · 2020-10-08T15:29:32Z

I am using scrollable_positioned_list directly, not via flutter_widgets. At the minute, I am unable to reproduce an error on newly built flutter app, but still have problem on my original project. I will try to reproduce the exception on demo app and share the repo.

a-v-ebrahimi · 2020-10-08T16:01:04Z

@tarobins Thanks a lot for the quick fix!👏
This worked like a charm: tarobins/sp_example@41ab3fa

bachras · 2020-10-09T10:24:40Z

I have ended up creating new app and copying dart files as original project was created pre flutter 1.12 and I assume that was causing the issue. It works now. Thanks

tarobins self-assigned this Oct 7, 2020

bachras closed this as completed Oct 9, 2020

tarobins mentioned this issue Oct 11, 2020

scrollable_positioned_list scroll not working on latest Flutter's master #160

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scrollable_positioned_list stopped worked after flutter 1.22 upgrade #183

scrollable_positioned_list stopped worked after flutter 1.22 upgrade #183

bachras commented Oct 6, 2020

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bachras commented Oct 8, 2020

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bachras commented Oct 9, 2020

scrollable_positioned_list stopped worked after flutter 1.22 upgrade #183

scrollable_positioned_list stopped worked after flutter 1.22 upgrade #183

Comments

bachras commented Oct 6, 2020

Problem description

Steps to reproduce

Expected behavior

Actual behavior

Environment

Mehedi50200 commented Oct 6, 2020 • edited Loading

Exception thrown

haroonkhan335 commented Oct 7, 2020

tarobins commented Oct 7, 2020

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