My app is crashing at launch in Test Flight in iPad. Can anyone help me understand where the problem is?

Hi I am trying to find why my app is crashing at launch in Test Flight. I have tested it many times in debugger and release environment but it does not crash.

Can any kind soul help me understanding why my app is crashing from the crash log?

OS Version:          iPhone OS 14.5.1 (18E212)

Release Type:        User

Baseband Version:    n/a

Report Version:      104

Exception Type:  EXC_CRASH (SIGABRT)

Exception Codes: 0x0000000000000000, 0x0000000000000000

Exception Note:  EXC_CORPSE_NOTIFY

Triggered by Thread:  3

Application Specific Information:

abort() called

Last Exception Backtrace:

0   CoreFoundation                0x19765b5b4 __exceptionPreprocess + 220

1   libobjc.A.dylib               0x1ac0da7a8 objc_exception_throw + 59

2   CoreFoundation                0x19755f6d4 -[NSException raise] + 15

3   CardScanner                   0x100485c2c 0x1001d0000 + 2841644

4   CardScanner                   0x100436e10 0x1001d0000 + 2518544

5   libdispatch.dylib             0x197246a54 _dispatch_call_block_and_release + 31

6   libdispatch.dylib             0x1972487ec _dispatch_client_callout + 19

7   libdispatch.dylib             0x19724b938 _dispatch_queue_override_invoke + 755

8   libdispatch.dylib             0x197259fb0 _dispatch_root_queue_drain + 387

9   libdispatch.dylib             0x19725a7a8 _dispatch_worker_thread2 + 111

10  libsystem_pthread.dylib       0x1e245a768 _pthread_wqthread + 215

11  libsystem_pthread.dylib       0x1e246174c start_wqthread + 7

Thread 0 name:  Dispatch queue: com.apple.main-thread

Thread 0:

0   libsystem_malloc.dylib        0x00000001a6c45ed4 nanov2_allocate_from_block + 240

1   libsystem_malloc.dylib        0x00000001a6c450ac nanov2_allocate + 128

2   libsystem_malloc.dylib        0x00000001a6c450ac nanov2_allocate + 128

3   libsystem_malloc.dylib        0x00000001a6c456a8 nanov2_calloc + 152

4   libsystem_malloc.dylib        0x00000001a6c49ab0 _malloc_zone_calloc + 88

5   libobjc.A.dylib               0x00000001ac0bc100 realizeClassWithoutSwift+ 41216 (objc_class*, objc_class*) + 100

6   libobjc.A.dylib               0x00000001ac0bbf78 realizeClassMaybeSwiftMaybeRelock+ 40824 (objc_class*, mutex_tt&, bool) + 244

7   libobjc.A.dylib               0x00000001ac0cab08 lookUpImpOrForward + 884

8   libobjc.A.dylib               0x00000001ac0b4644 _objc_msgSend_uncached + 68

9   UIKitCore                     0x0000000199b351f0 -[UIApplicationSceneSpecification initialActionHandlers] + 156

10  UIKitCore                     0x00000001994c2458 +[UIScene _connectionOptionsForScene:withSpecification:transitionContext:actions:sceneSession:] + 188

11  UIKitCore                     0x000000019a03e0c4 -[UIApplication _connectUISceneFromFBSScene:transitionContext:] + 460

12  UIKitCore                     0x000000019a03e698 -[UIApplication workspace:didCreateScene:withTransitionContext:completion:] + 332

13  UIKitCore                     0x0000000199b346ac -[UIApplicationSceneClientAgent scene:didInitializeWithEvent:completion:] + 388

14  FrontBoardServices            0x00000001a6bb75d8 -[FBSScene _callOutQueue_agent_didCreateWithTransitionContext:completion:] + 440

15  FrontBoardServices            0x00000001a6be2d44 __94-[FBSWorkspaceScenesClient createWithSceneID:groupID:parameters:transitionContext:completion:]_block_invoke.200 + 128

16  FrontBoardServices            0x00000001a6bc66a4 -[FBSWorkspace _calloutQueue_executeCalloutFromSource:withBlock:] + 240

17  FrontBoardServices            0x00000001a6be2a0c __94-[FBSWorkspaceScenesClient createWithSceneID:groupID:parameters:transitionContext:completion:]_block_invoke + 372

18  libdispatch.dylib             0x00000001972487ec _dispatch_client_callout + 20

19  libdispatch.dylib             0x000000019724c2dc _dispatch_block_invoke_direct + 268

20  FrontBoardServices            0x00000001a6c0afa0 FBSSERIALQUEUE_IS_CALLING_OUT_TO_A_BLOCK + 48

21  FrontBoardServices            0x00000001a6c0ac30 -[FBSSerialQueue _targetQueue_performNextIfPossible] + 448

22  FrontBoardServices            0x00000001a6c0b184 -[FBSSerialQueue _performNextFromRunLoopSource] + 32

23  CoreFoundation                0x00000001975d5848 CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION + 28

24  CoreFoundation                0x00000001975d5744 __CFRunLoopDoSource0 + 208

25  CoreFoundation                0x00000001975d4ab4 __CFRunLoopDoSources0 + 376

26  CoreFoundation                0x00000001975cea28 __CFRunLoopRun + 820

27  CoreFoundation                0x00000001975ce1c0 CFRunLoopRunSpecific + 600

28  GraphicsServices              0x00000001aebb6734 GSEventRunModal + 164

29  UIKitCore                     0x000000019a03c7e4 -[UIApplication _run] + 1072

30  UIKitCore                     0x000000019a042054 UIApplicationMain + 168

31  libswiftUIKit.dylib           0x00000001ab35424c UIApplicationMain+ 94796 (::::) + 104

32  CardScanner                   0x00000001001ddfe8 0x1001d0000 + 57320

33  libdyld.dylib                 0x000000019728acf8 start + 4

Thread 1:

0   libsystem_pthread.dylib       0x00000001e2461744 start_wqthread + 0

Thread 2:

0   libsystem_pthread.dylib       0x00000001e2461744 start_wqthread + 0

Thread 3 name:  Dispatch queue: com.apple.root.default-qos

Thread 3 Crashed:

0   libsystem_kernel.dylib        0x00000001c4fb9334 __pthread_kill + 8

1   libsystem_pthread.dylib       0x00000001e2459aa0 pthread_kill + 272

2   libsystem_c.dylib             0x00000001a09dbb90 abort + 104

3   libc++abi.dylib               0x00000001ac1bbbb8 __cxxabiv1::__aligned_malloc_with_fallback+ 80824 (unsigned long) + 0

4   libc++abi.dylib               0x00000001ac1acec8 demangling_unexpected_handler+ 20168 () + 0

5   libobjc.A.dylib               0x00000001ac0b905c _objc_terminate+ 28764 () + 144

6   libc++abi.dylib               0x00000001ac1bafa0 std::__terminate(void (*)+ 77728 ()) + 20

7   libc++abi.dylib               0x00000001ac1baf2c std::terminate+ 77612 () + 48

8   libdispatch.dylib             0x0000000197248800 _dispatch_client_callout + 40

9   libdispatch.dylib             0x000000019724b938 _dispatch_queue_override_invoke + 756

10  libdispatch.dylib             0x0000000197259fb0 _dispatch_root_queue_drain + 388

11  libdispatch.dylib             0x000000019725a7a8 _dispatch_worker_thread2 + 112

12  libsystem_pthread.dylib       0x00000001e245a768 _pthread_wqthread + 216

13  libsystem_pthread.dylib       0x00000001e246174c start_wqthread + 8

Thread 4:

0   libsystem_pthread.dylib       0x00000001e2461744 start_wqthread + 0

Thread 5:

0   libsystem_pthread.dylib       0x00000001e2461744 start_wqthread + 0

Answered by LanceLink42 in 679892022

From the log I am guessing you app is called CardScanner, and the first step you should perform is getting the log 'symbolicated', it will be more apparent where the crash is occurring:

3 CardScanner         0x100485c2c 0x1001d0000 + 2841644
4 CardScanner         0x100436e10 0x1001d0000 + 2518544

When symbolicated, those numbers (0x100485c2c 0x1001d0000 + 2841644) will turn into method names, which will help. You should be able to symbolicate from Xcode -> Window -> Organiser and selecting Crashes, or on the device by selecting the device in Devices and Simulators, then view logs, then right click on your app name and selecting re-symbolicate

From the top of the log I can see that the thread that crashed was Thread 3:

Triggered by Thread: 3

So, check you're not updating the UI off that thread? (UI updates should be Dispatched onto main thread).

The exception is:

EXC_CRASH (SIGABRT)

So check there's not a nil somewhere that shouldn't be there, eg: inserting nil into an array or a dictionary, or setting something that is not an optional to nil ( or you've force unwrapped an optional using '!' )

Accepted Answer

From the log I am guessing you app is called CardScanner, and the first step you should perform is getting the log 'symbolicated', it will be more apparent where the crash is occurring:

3 CardScanner         0x100485c2c 0x1001d0000 + 2841644
4 CardScanner         0x100436e10 0x1001d0000 + 2518544

When symbolicated, those numbers (0x100485c2c 0x1001d0000 + 2841644) will turn into method names, which will help. You should be able to symbolicate from Xcode -> Window -> Organiser and selecting Crashes, or on the device by selecting the device in Devices and Simulators, then view logs, then right click on your app name and selecting re-symbolicate

From the top of the log I can see that the thread that crashed was Thread 3:

Triggered by Thread: 3

So, check you're not updating the UI off that thread? (UI updates should be Dispatched onto main thread).

The exception is:

EXC_CRASH (SIGABRT)

So check there's not a nil somewhere that shouldn't be there, eg: inserting nil into an array or a dictionary, or setting something that is not an optional to nil ( or you've force unwrapped an optional using '!' )

Hey got the almost same error Thread 8 Crashed:: Dispatch queue: expo.controller.AssetFilesQueue

if you find the solution can you help me over this?

My app is crashing at launch in Test Flight in iPad. Can anyone help me understand where the problem is?
 
 
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