Bug Crash when quitting the application (JobQueue::WaitForJobGroupID(JobGroupID, JobQueue::JobQueueWorkS

After updating to Unity 2020.3.42 from 2020.3.19, a crash is reported by Firebase Crashytics after the user closes the application.

This is the stack trace:

Code (CSharp):

1. Crashed: com.apple.main-thread
2. EXC_BAD_ACCESS KERN_INVALID_ADDRESS 0x000000000000010a
3.  
4. 0  UnityFramework                 0xeb1670 JobQueue::WaitForJobGroupID(JobGroupID, JobQueue::JobQueueWorkStealMode) + 1750 (JobQueue.cpp:1750)
5. 1  UnityFramework                 0xead754 CompleteFenceInternal(JobFence&, WorkStealMode) + 17 (Jobs.cpp:17)
6. 2  UnityFramework                 0xe017c4 AsyncUploadManager::~AsyncUploadManager() + 282 (Jobs.h:282)
7. 3  UnityFramework                 0xe01514 AsyncUploadManager::StaticDestroy(void*) + 203 (MemoryMacros.h:203)
8. 4  UnityFramework                 0x104bd3c RegisterRuntimeInitializeAndCleanup::ExecuteCleanup() + 520 (dynamic_array.h:520)
9. 5  UnityFramework                 0xf23b54 RuntimeCleanup() + 728 (Player.cpp:728)
10. 6  UnityFramework                 0x155b4 -[UnityAppController applicationWillTerminate:] + 526 (UnityAppController.mm:526)
11. 7  UIKitCore                      0xd3dc24 -[UIApplication _terminateWithStatus:] + 196
12. 8  UIKitCore                      0x29090c -[_UISceneLifecycleMultiplexer _evalTransitionToSettings:fromSettings:forceExit:withTransitionStore:] + 112
13. 9  UIKitCore                      0x6a7cd4 -[_UISceneLifecycleMultiplexer forceExitWithTransitionContext:scene:] + 164
14. 10 UIKitCore                      0xd3a040 -[UIApplication workspaceShouldExit:withTransitionContext:] + 176
15. 11 FrontBoardServices             0x41e74 __63-[FBSWorkspaceScenesClient willTerminateWithTransitionContext:]_block_invoke_2 + 72
16. 12 FrontBoardServices             0x6c24 -[FBSWorkspace _calloutQueue_executeCalloutFromSource:withBlock:] + 168
17. 13 FrontBoardServices             0x41e14 __63-[FBSWorkspaceScenesClient willTerminateWithTransitionContext:]_block_invoke + 128
18. 14 libdispatch.dylib              0x3fdc _dispatch_client_callout + 20
19. 15 libdispatch.dylib              0x7a5c _dispatch_block_invoke_direct + 264
20. 16 FrontBoardServices             0x10d40 __FBSSERIALQUEUE_IS_CALLING_OUT_TO_A_BLOCK__ + 52
21. 17 FrontBoardServices             0x108dc -[FBSSerialQueue _targetQueue_performNextIfPossible] + 220
22. 18 FrontBoardServices             0x13184 -[FBSSerialQueue _performNextFromRunLoopSource] + 28
23. 19 CoreFoundation                 0xd5f34 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 28
24. 20 CoreFoundation                 0xe230c __CFRunLoopDoSource0 + 176
25. 21 CoreFoundation                 0x66230 __CFRunLoopDoSources0 + 340
26. 22 CoreFoundation                 0x7bb8c __CFRunLoopRun + 836
27. 23 CoreFoundation                 0x80ec0 CFRunLoopRunSpecific + 612
28. 24 GraphicsServices               0x1368 GSEventRunModal + 164
29. 25 UIKitCore                      0x3a186c -[UIApplication _run] + 888
30. 26 UIKitCore                      0x3a14d0 UIApplicationMain + 340
31. 27 UnityFramework                 0x1a05c -[UnityFramework runUIApplicationMainWithArgc:argv:] + 96 (main.mm:96)

It can be reproduced on most devices (tablets, phones) and iOS/iPadOS 15+.

 

I also had the same crash on exit issue after upgrading to Unity 2020.3.42.
However, the cause of the exit was different, so I am splitting it into a separate thread.
Does anyone know if these are related issues?

https://forum.unity.com/threads/ios-app-built-with-unity-2020-3-42-always-crashes-on-exit.1370622/

 

Please pay attention to this bug @Unity, we have the same issue too.
We experience the issue on Ubuntu 22.04

 

I have same issue too for ubuntu 22.04 looking for fix but no one solved, @TomasKucinskas dear moderator please add new 2020. version and fix it, I do not want to jump 2021 because my unity project is very big and in 2021 i have a lot of problem, so i want to just fix this...

 

in 2020.3.42f1 we experience Segmentation fault (core dumped) on application quit, so I have digged into it.



In someway, AsyncUploadManager::StaticDestroy is being added to RegisterRuntimeInitializeAndCleanup::ExecuteCleanup()'s cleanup list and AsyncUploadManager::StaticDestroy is using JobQueue::WaitForJobGroupID which uses gQueue but RegisterRuntimeInitializeAndCleanup::ExecuteCleanup() is being called after DestroyJobQueue(JobQueue *a1) therefore gQueue is being null then causes Segmentation fault on application quit.
As I do not have the source code, I do not know what adds AsyncUploadManager::StaticDestroy to RegisterRuntimeInitializeAndCleanup::ExecuteCleanup()'s cleanup list but we run our servers on Unity and we need a solution ASAP, please provide us a work-around or fix it fastly.

Experiencing the issue on Ubuntu 22.04 64 Bit.

 

@Unity I'm also chiming in to take a look at this. We're seeing the exact same problem. Any workaround or fix would be appreciated.

 

I am also suffering from the same issue.
Unity version: 2020.3.42f1

 

I have the same crash with 2020.3.43f1 on the app quit with Windows Standalone. Unity 2020.3.38 didn't have this issue.

 

Do you still need a bug report?

 

Did you report the bug?

@Alexey any update?

 

Can anybody confirm whether this is fixed in 2020.3.44?

 

No sorry, I didn't. I downgraded instead.

 

I discovered the same issue after upgrading to 2020.3.43.
Not sure about 2020.3.44 but I just upgraded Unity to 2021.3.16 and it looks like it doesn't happen there (at least on windows)

 

I suggest 2020.3.41f1 as it doesn't have this bug.

 

Do you have any ETA for 2020.3.45f1? No need an exact date but something like in 2 weeks etc.

 

We see the same crash reports on android after update from 2020.3.32f1 to 2020.3.44f1. I guess based on the history of Unity releases - updates usually come out somewhere in the middle of each month. Then perhaps the update will be only in mid-February. So, since we can't wait fix we'll try roll back to 2020.3.41f1 as written here that there is no crash

 

@Alexey

 

Just to give this topic's followers a notification, 2020.3.45f1 is released.

 

Thanks. Where? Couldn't find it on https://unity.com/releases/editor/archive or on Unity Hub. So I guess that as a notification when launching Unity.

(EDIT) Yes, inside Unity it is already showing the notification to update.

BUTTT.... Checking the release notes(https://unity.com/releases/editor/whats-new/2020.3.45) there is no mention to any fix to this crash. Anyone has already checked it?

 

Didn't see any mention in release notes as well but after updating to 2020.3.45 I no longer experience crashes on Windows standalone build and in editor (it was showing editor crash after quitting) so I guess it is fixed.

 

Ok. I will test the exit crash on iOs (the initial post of this thread), which, hopefully, was fixed. I will update here asap.

 

My app update was already released on the AppStore and no issues this time =)