Expression: cannot dereference end map/set iterator on Windows

[Skyost]

Checklist

• I read the troubleshooting guide before raising this issue
• I made sure that the issue I am raising doesn't already exist

Current bug behaviour

Audio cannot be played on Windows due to a MVC++ error occuring.

Expected behaviour

Audio should play without any problem.

Steps to reproduce

1. Clone the repository and extract the flame_audio example project.
2. Run flutter create . in order to create the Windows project.
3. flutter run.

Code sample

Code sample

import 'package:flame/components.dart';
import 'package:flame/extensions.dart';
import 'package:flame/game.dart';
import 'package:flame/input.dart';
import 'package:flame/palette.dart';
import 'package:flame_audio/flame_audio.dart';
import 'package:flutter/widgets.dart' hide Animation;

void main() {
  runApp(GameWidget(game: AudioGame()));
}

/// This example game showcases three possible use cases:
///
/// 1. Use the static FlameAudio class to easily fire a sfx using the default
/// configs for the button tap.
/// 2. Uses a custom AudioPool for extremely efficient audio loading and pooling
/// for tapping elsewhere.
/// 3. Uses the Bgm utility for background music.
class AudioGame extends FlameGame with TapDetector {
  static Paint black = BasicPalette.black.paint();
  static Paint gray = const PaletteEntry(Color(0xFFCCCCCC)).paint();
  static TextPaint text = TextPaint(
    style: TextStyle(color: BasicPalette.white.color),
  );

  late AudioPool pool;

  @override
  Future<void> onLoad() async {
    pool = await FlameAudio.createPool(
      'sfx/fire_2.mp3',
      minPlayers: 3,
      maxPlayers: 4,
    );
    startBgmMusic();
  }

  Rect get button => Rect.fromLTWH(20, size.y - 300, size.x - 40, 200);

  void startBgmMusic() {
    FlameAudio.bgm.initialize();
    FlameAudio.bgm.play('music/bg_music.ogg');
  }

  void fireOne() {
    FlameAudio.play('sfx/fire_1.mp3');
  }

  void fireTwo() {
    pool.start();
  }

  @override
  void render(Canvas canvas) {
    super.render(canvas);
    canvas.drawRect(size.toRect(), black);

    text.render(
      canvas,
      '(click anywhere for 1)',
      Vector2(size.x / 2, 200),
      anchor: Anchor.topCenter,
    );

    canvas.drawRect(button, gray);

    text.render(
      canvas,
      'click here for 2',
      Vector2(size.x / 2, size.y - 200),
      anchor: Anchor.bottomCenter,
    );
  }

  @override
  void onTapDown(TapDownInfo info) {
    if (button.containsPoint(info.eventPosition.game)) {
      fireTwo();
    } else {
      fireOne();
    }
  }
}

(as you can see, it's the sample project of flame_audio, which is available here).

Affected platforms

Windows

Platform details

Processor : AMD Ryzen 5 5600H with Radeon Graphics 3.30 GHz
RAM : 16,0 Go (15,3 Go usable)
Edition : Windows 11 Famille
Version : 22H2
Installed on : ‎05/‎10/‎2022
OS Build : 22621.1555
Experience : Windows Feature Experience Pack 1000.22640.1000.0

AudioPlayers Version

4.0.1

Build mode

debug

Audio Files/URLs/Sources

bg_music.ogg

Screenshots

Logs

No log as it's a native error. See screenshot above.

Related issues / more information

No response

Working on PR

Why not, but I have no C++ experience.

[Gustl22]

Good catch @Skyost. The following happens: Dispose is called on bgm in FlameAudio, which should not be the case as it makes the player obsolete, should be replaced with release() (cc @spydon).

But it should also be tested and fixed in AP, as a player could call a method even after being disposed.

#1450
#1478

Further .ogg is not supported by Windows, but that was not the problem for crashing here :)

[spydon]

Good catch indeed, I'll fix flame_audio!

[Skyost]

Good ! Can I close this one @Gustl22 ?

[Gustl22]

I'll close, when #1480 is merged ;)