Remove listener doesn't remove the listener

[igloo12]

I am listening to a provider with

void initState(){
super.initState();
 Provider.of<MyModel>(context, listen: false)
        .addListener(myModelListener);
}

and removing it with

 @override
  void dispose() {
    Provider.of< MyModel >(context, listen: false)
        .removeListener(myModelListener);
    super.dispose();
  }

when I trigger the provider after my view was disposed it throws a null exception

The following TypeErrorImpl was thrown while finalizing the widget tree:
Unexpected null value.

When the exception was thrown, this was the stack: 
dart-sdk/lib/_internal/js_dev_runtime/private/ddc_runtime/errors.dart 251:49      throw_
dart-sdk/lib/_internal/js_dev_runtime/private/ddc_runtime/operations.dart 528:63  nullCheck
packages/flutter/src/widgets/framework.dart 3129:31                               get widget
packages/provider/src/provider.dart 343:16                                        _inheritedElementOf
packages/provider/src/provider.dart 295:30                                        of```

[rrousselGit]

You cannot call Provider.of within the dispose method.

[igloo12]

@rrousselGit How do I deregister the listener then when the view is destroyed?

[rrousselGit]

You should keep a reference on the provided value inside your state

MyModel? _myModel;

didChangeDependencies() {
  super.didChangeDependencies();
  _myModel = Provider.of<MyModel>();
}

dispose() {
  _myModel!.removeListener();
}

[rrousselGit]

👋
I'll close this since this was answered. Feel free to create a new issue if you still have the problem 😄