Using `StreamProvider.future` may cause memory leaks.

stream_provider_leaks.dart

// flutter_riverpod: 2.4.9

import 'dart:async';
import 'dart:math' as math;

import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';

final random = math.Random();

final baseStreamController = StreamController<int>.broadcast();

final baseStream = StreamProvider.autoDispose(
  (ref) => baseStreamController.stream.map((event) => event),
);

final countFuture = FutureProvider.autoDispose((ref) {
  return ref.watch(baseStream.future);
});

void main() {
  runApp(const ProviderScope(child: MainApp()));
}

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

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: const Text('Randomize'),
        ),
        body: const Center(
          child: _CurrentValue(),
        ),
        floatingActionButton: const _Button(),
      ),
    );
  }
}

class _CurrentValue extends ConsumerWidget {
  const _CurrentValue();

  @override
  Widget build(BuildContext context, WidgetRef ref) {
    final current = ref.watch(countFuture).valueOrNull;
    return Text('Current: $current');
  }
}

class _Button extends StatelessWidget {
  const _Button();

  @override
  Widget build(BuildContext context) {
    return FloatingActionButton(
      onPressed: () => baseStreamController.add(random.nextInt(100)),
      child: const Icon(Icons.repeat),
    );
  }
}

success.dart

// Below code is not confirmed to memory leak.

import 'dart:async';
import 'dart:math' as math;

import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';

final random = math.Random();

final baseStreamController = StreamController<int>.broadcast();

final baseStream = StreamProvider.autoDispose(
  (ref) => baseStreamController.stream.map((event) => event),
);

// final countFuture = FutureProvider.autoDispose((ref) {
//   return ref.watch(baseStream.future);
// });

void main() {
  runApp(const ProviderScope(child: MainApp()));
}

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

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: const Text('Randomize'),
        ),
        body: const Center(
          child: _CurrentValue(),
        ),
        floatingActionButton: const _Button(),
      ),
    );
  }
}

class _CurrentValue extends ConsumerWidget {
  const _CurrentValue();

  @override
  Widget build(BuildContext context, WidgetRef ref) {
    return FutureBuilder(
      future: ref.watch(baseStream.future),
      builder: (context, snapshot) => snapshot.hasData
          ? Text('Current: ${snapshot.data}')
          : const Center(
              child: CircularProgressIndicator(),
            ),
    );
  }
}

class _Button extends StatelessWidget {
  const _Button();

  @override
  Widget build(BuildContext context) {
    return FloatingActionButton(
      onPressed: () => baseStreamController.add(random.nextInt(100)),
      child: const Icon(Icons.repeat),
    );
  }
}