LateInitializationError on two providers: what was wrong?

[sunboyy]

I have written a code with two riverpod provider as below

import 'package:riverpod_annotation/riverpod_annotation.dart';

part 'providers.g.dart';

@riverpod
Future<String> foo(FooRef ref) async {
  return 'Hello';
}

@riverpod
class Bar extends _$Bar {
  @override
  Bar build() {
    return Bar();
  }

  Future<void> printFoo() async {
    final fooValue = await ref.read(fooProvider.future);
    print(fooValue);
  }
}

When I called container.read(barProvider).printFoo(), a LateInitializationError exception was thrown. What was I writing wrong?

Unhandled exception:
LateInitializationError: Field '_element@26511105' has not been initialized.
#0      BuildlessAutoDisposeNotifier._element (package:riverpod/src/notifier/auto_dispose.dart)
#1      BuildlessAutoDisposeNotifier.ref (package:riverpod/src/notifier/auto_dispose.dart:19:52)
#2      Bar.printFoo (package:cli/providers.dart:18:28)

[AhmedLSayed9]

You're returning a new instance of Bar Notifier class instead of returning the current instance:

  Bar build() {
    return this;
  }

[sunboyy]

Thanks!