Failed assertion: line 732 pos 7: '_ticker != null': AnimationController.stop() called after AnimationController.dispose()

[obrunsmann]

Hey!

I am using this package within the following BLoC implementation:

Center(
  child: state is LogCreateSubmitting
      ? Loading()
      : RaisedButton(
          child: Text('Submit'),
          onPressed: () {
            context.bloc<LogCreateBloc>().add(CreateFormSubmitted(
                  _startDate,
                  _endDate,
                  _summaryController.text,
                  _noteController.text,
                ));
          },
        ),
),

As soon as the state changes await from LogCreateSubmitting and the Loading gets unmounted the exception throws.

I wrapped your Library withing a small statelss widget so that I do not have to repeat my loading type all over the application:

import 'package:flutter/material.dart';
import 'package:loading/indicator/ball_pulse_indicator.dart';
import 'package:loading/loading.dart' as LoadingSdk;

class Loading extends StatelessWidget {
  const Loading({Key key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return LoadingSdk.Loading(
      color: Theme.of(context).primaryColor,
      indicator: BallPulseIndicator(),
    );
  }
}

Log:

[VERBOSE-2:ui_dart_state.cc(157)] Unhandled Exception: 'package:flutter/src/animation/animation_controller.dart': Failed assertion: line 732 pos 7: '_ticker != null': AnimationController.stop() called after AnimationController.dispose()
AnimationController methods should not be used after calling dispose.
#0      _AssertionError._doThrowNew  (dart:core-patch/errors_patch.dart:42:39)
#1      _AssertionError._throwNew  (dart:core-patch/errors_patch.dart:38:5)
#2      AnimationController.stop 
package:flutter/…/animation/animation_controller.dart:732
#3      AnimationController.repeat 
package:flutter/…/animation/animation_controller.dart:628
#4      BallPulseIndicator.startAnim  (package:loading/indicator/ball_pulse_indicator.dart:48:16)
#5      BallPulseIndicator.startAnims.<anonymous closure>  (package:loading/indicator/ball_pulse_indicator.dart:55:9)
#6      new Future.delayed.<anonymous closure>  (dart:async/future.dart:316:39)
#7      _rootRun  (dart:async/zone.dart:1122:38)
#8      _CustomZon<…>

[410063005]

I've encountered the same question。 This is my workaround: create a fixed verson Indicator

https://gist.github.com/410063005/937a9a464a58f5bcc1c0d9b4ad1f1b31

Hope it helps

[410063005]

It was fixed in this commit 8f5a63f

But maybe we need a new release

[smasinde]

If anyone wants to use the fix while you wait for the official release, put it like this in your pubspec:

 loading:
    git:
      url: git://github.com/leonzone/loading.git
      path: loading
      ref: 8f5a63f

[Dreamersoul]

hello,
when will be released officially?
thank you

[silkyland]

Release this please.....

[zenkog]

Got the same issue, when will this be released ?

[m0veax]

Can we support you to release that commit?