Using `C#` built-in `Timer` Crashes Android `AAB` Export

[MrZak-dev]

Godot version

3.4.mono.stable , 3.4.1.mono.rc1

System information

Android

Issue description

Using C# built-in Timer Crashes Android AAB Export.

maybe releated to https://github.com/godotengine/godot/issues/48458 ,

Steps to reproduce

• New Project

• Use C# built-in Timer

  public override void _Ready()
  {
      MyTimer = new Timer();
      MyTimer.Interval = 1000;
      MyTimer.Elapsed += (sender, args) => {
          GD.Print("Hello");
      };
      MyTimer.Start();
  
  }

• Export game to AAB

• Extract APKs from exported AAB using Bundletool

  $~ java -jar bundletool-all-1.8.2.jar build-apks --bundle=./exported.aab --output=./output.apks

• Install output.apks to a connected Android device

  $~ java -jar bundletool-all-1.8.2.jar install-apks --apks .\output.apks

Crash log

--------- beginning of crash
2021-12-01 13:13:00.942 7285-7398/? A/libc: FORTIFY: pthread_mutex_lock called on a destroyed mutex (0xc17ed80c)
2021-12-01 13:13:00.946 7285-7398/? A/libc: Fatal signal 6 (SIGABRT), code -1 (SI_QUEUE) in tid 7398 (Thread Pool Wor), pid 7285 (icopo.SpaceFire)
2021-12-01 13:13:00.939 7285-7342/? E/mono: Unhandled Exception:
    System.DllNotFoundException: __Internal assembly:<unknown assembly> type:<unknown type> member:(null)
        at (wrapper managed-to-native) System.TimeZoneInfo+AndroidTimeZones.monodroid_get_system_property(string,intptr&)
      at System.TimeZoneInfo+AndroidTimeZones.GetDefaultTimeZoneName () [0x00029] in <a947100bfc9e4b689622af54e1e07934>:0 
      at System.TimeZoneInfo+AndroidTimeZones.get_Local () [0x00000] in <a947100bfc9e4b689622af54e1e07934>:0 
      at System.TimeZoneInfo.CreateLocal () [0x00000] in <a947100bfc9e4b689622af54e1e07934>:0 
      at System.TimeZoneInfo.get_Local () [0x00009] in <a947100bfc9e4b689622af54e1e07934>:0 
      at System.TimeZoneInfo.GetDateTimeNowUtcOffsetFromUtc (System.DateTime time, System.Boolean& isAmbiguousLocalDst) [0x00000] in <a947100bfc9e4b689622af54e1e07934>:0 
      at System.DateTime.get_Now () [0x00008] in <a947100bfc9e4b689622af54e1e07934>:0 
      at System.Timers.Timer.MyTimerCallback (System.Object state) [0x00019] in <ff8dc755b313498597c01f2c3444935b>:0 
      at System.Threading.Timer+Scheduler.TimerCB (System.Object o) [0x00007] in <a947100bfc9e4b689622af54e1e07934>:0 
      at System.Threading.QueueUserWorkItemCallback.System.Threading.IThreadPoolWorkItem.ExecuteWorkItem () [0x00008] in <a947100bfc9e4b689622af54e1e07934>:0 
      at System.Threading.ThreadPoolWorkQueue.Dispatch () [0x00074] in <a947100bfc9e4b689622af54e1e07934>:0 
      at System.Threading._ThreadPoolWaitCallback.PerformWaitCallback () [0x00000] in <a947100bfc9e4b689622af54e1e07934>:0 

Minimal reproduction project

UnisgTimersAABCrash.zip

[Calinou]

@MrZak-dev Does it crash if you export a release APK instead (and a debug APK/one-click deploy)?

[MrZak-dev]

@Calinou No it doesn't , it crashes only when you export AAB and install it directly from Google play or using Bundletool and exporting apks from The AAB

[oknpk]

Hi, is there any solution? After uploading the app to google play, the app crashes after splash screen. No problem as .APK, now I'm trying to remove the timers and datetime methods from the project.

[MrZak-dev]

the only solution i found for my particular project is to not use C# built-in timers and i have switched all of them to the regular Godot timer Node.

[oknpk]

After a little look, my problem was different. I am using LiteDB database and LINQ. These also crash. I'll open a new issue after doing some more research.

[akien-mga]

Fixed by #57420.