[Bug]: App crashes on launch

[iThink32]

What happened?

On clicking of the app icon, the app crashes. It's not even allowing the app to open nor initialise any other crash reporting SDK.
I luckily got a crash report from iOS users and it points out at this SDK.

Guys this is extremely unacceptable.

Steps to reproduce?

Tap on the app icon and it crashes

What did you expect to happen?

App shouldn't Crash.

OneSignal iOS SDK version

5.2.0

iOS version

17

Specific iOS version

No response

Relevant log output

Exception Type:  EXC_CRASH (SIGABRT)
Exception Codes: 0x0000000000000000, 0x0000000000000000
Termination Reason: SIGNAL 6 Abort trap: 6
Terminating Process: Brent [625]

Triggered by Thread:  6

Application Specific Information:
abort() called


Last Exception Backtrace:
0   CoreFoundation                	       0x199098f20 __exceptionPreprocess + 164
1   libobjc.A.dylib               	       0x190f232b8 objc_exception_throw + 60
2   Foundation                    	       0x19859f7f8 _userInfoForFileAndLine + 0
3   UIKitCore                     	       0x19b591df4 -[UIApplication _performAfterCATransactionCommitsWithLegacyRunloopObserverBasedTiming:block:] + 412
4   UIKitCore                     	       0x19b552618 +[UIViewController _scheduleTransition:] + 308
5   UIKitCore                     	       0x19b5521e4 +[UIPresentationController _scheduleTransition:] + 60
6   UIKitCore                     	       0x19b54ea40 -[UIPresentationController runTransitionForCurrentState] + 1560
7   UIKitCore                     	       0x19b676564 -[UIPresentationController _presentWithAnimationController:inWindow:interactionController:target:didFinish:] + 568
8   UIKitCore                     	       0x19b803d30 -[UIViewController _presentViewController:modalSourceViewController:presentationController:animationController:interactionController:completion:] + 1156
9   UIKitCore                     	       0x19b804edc -[UIViewController _presentViewController:withAnimationController:completion:] + 3232
10  UIKitCore                     	       0x19b80697c __63-[UIViewController _presentViewController:animated:completion:]_block_invoke + 88
11  UIKitCore                     	       0x19b8009b4 -[UIViewController _performCoordinatedPresentOrDismiss:animated:] + 484
12  UIKitCore                     	       0x19b8006dc -[UIViewController _presentViewController:animated:completion:] + 188
13  UIKitCore                     	       0x19b800570 -[UIViewController presentViewController:animated:completion:] + 164
14  BrentCore                     	       0x106e2a5b0 0x106c4c000 + 1959344
15  BrentCore                     	       0x106d16610 0x106c4c000 + 828944
16  BrentCore                     	       0x106d167e8 0x106c4c000 + 829416
17  OneSignalNotifications        	       0x105109ea8 __104-[OneSignalNotificationsUNUserNotificationCenter onesignalGetNotificationSettingsWithCompletionHandler:]_block_invoke + 60
18  libdispatch.dylib             	       0x1a0f3d13c _dispatch_call_block_and_release + 32
19  libdispatch.dylib             	       0x1a0f3edd4 _dispatch_client_callout + 20
20  libdispatch.dylib             	       0x1a0f46400 _dispatch_lane_serial_drain + 748
21  libdispatch.dylib             	       0x1a0f46f64 _dispatch_lane_invoke + 432
22  libdispatch.dylib             	       0x1a0f51cb4 _dispatch_root_queue_drain_deferred_wlh + 288
23  libdispatch.dylib             	       0x1a0f51528 _dispatch_workloop_worker_thread + 404
24  libsystem_pthread.dylib       	       0x1f5ae8934 _pthread_wqthread + 288
25  libsystem_pthread.dylib       	       0x1f5ae50cc start_wqthread + 8

Thread 0 name:   Dispatch queue: com.apple.main-thread
Thread 0:
0   libsystem_kernel.dylib        	       0x1e1ced65c semaphore_timedwait_trap + 8
1   libdispatch.dylib             	       0x1a0f3f3ec _dispatch_sema4_timedwait + 64
2   libdispatch.dylib             	       0x1a0f3f9e8 _dispatch_semaphore_wait_slow + 76
3   OneSignalNotifications        	       0x105109318 -[OneSignalNotificationSettings getNotificationPermissionState] + 244
4   OneSignalNotifications        	       0x105106518 +[OSNotificationsManager getNotificationTypes] + 180
5   OneSignalNotifications        	       0x105106424 +[OSNotificationsManager sendNotificationTypesUpdateToDelegate] + 124
6   OneSignalFramework            	       0x1050d4b68 +[OneSignalTracker applicationForegrounded] + 220
7   OneSignalFramework            	       0x1050d39a4 -[OneSignalLifecycleObserver didBecomeActive] + 88
8   CoreFoundation                	       0x19906678c __CFNOTIFICATIONCENTER_IS_CALLING_OUT_TO_AN_OBSERVER__ + 148
9   CoreFoundation                	       0x1990666a8 ___CFXRegistrationPost_block_invoke + 88
10  CoreFoundation                	       0x1990665f0 _CFXRegistrationPost + 440
11  CoreFoundation                	       0x199064bb8 _CFXNotificationPost + 728
12  Foundation                    	       0x197ef2254 -[NSNotificationCenter postNotificationName:object:userInfo:] + 92
13  UIKitCore                     	       0x19b506b58 -[UIApplication _stopDeactivatingForReason:] + 1240
14  UIKitCore                     	       0x19b6a21d4 -[_UISceneLifecycleMultiplexer _performBlock:withApplicationOfDeactivationReasons:fromReasons:] + 280
15  UIKitCore                     	       0x19b431360 -[_UISceneLifecycleMultiplexer _evalTransitionToSettings:fromSettings:forceExit:withTransitionStore:] + 608
16  UIKitCore                     	       0x19b3fe594 -[_UISceneLifecycleMultiplexer uiScene:transitionedFromState:withTransitionContext:] + 248
17  UIKitCore                     	       0x19b3fdebc __186-[_UIWindowSceneFBSSceneTransitionContextDrivenLifecycleSettingsDiffAction _performActionsForUIScene:withUpdatedFBSScene:settingsDiff:fromSettings:transitionContext:lifecycleActionType:]_block_invoke + 148
18  UIKitCore                     	       0x19b3fd868 +[BSAnimationSettings(UIKit) tryAnimatingWithSettings:fromCurrentState:actions:completion:] + 736
19  UIKitCore                     	       0x19b3fcea8 _UISceneSettingsDiffActionPerformChangesWithTransitionContextAndCompletion + 224
20  UIKitCore                     	       0x19b4d0c80 -[_UIWindowSceneFBSSceneTransitionContextDrivenLifecycleSettingsDiffAction _performActionsForUIScene:withUpdatedFBSScene:settingsDiff:fromSettings:transitionContext:lifecycleActionType:] + 316
21  UIKitCore                     	       0x19b4cf4b8 __64-[UIScene scene:didUpdateWithDiff:transitionContext:completion:]_block_invoke.226 + 612
22  UIKitCore                     	       0x19b4cee10 -[UIScene _emitSceneSettingsUpdateResponseForCompletion:afterSceneUpdateWork:] + 216
23  UIKitCore                     	       0x19b599f48 -[UIScene scene:didUpdateWithDiff:transitionContext:completion:] + 244
24  UIKitCore                     	       0x19b599b28 -[UIApplicationSceneClientAgent scene:handleEvent:withCompletion:] + 336
25  FrontBoardServices            	       0x1b1e126e4 -[FBSScene updater:didUpdateSettings:withDiff:transitionContext:completion:] + 660
26  FrontBoardServices            	       0x1b1e22844 __94-[FBSWorkspaceScenesClient _queue_updateScene:withSettings:diff:transitionContext:completion:]_block_invoke_2 + 152
27  FrontBoardServices            	       0x1b1e226cc -[FBSWorkspace _calloutQueue_executeCalloutFromSource:withBlock:] + 168
28  FrontBoardServices            	       0x1b1e277fc __94-[FBSWorkspaceScenesClient _queue_updateScene:withSettings:diff:transitionContext:completion:]_block_invoke + 344
29  libdispatch.dylib             	       0x1a0f3edd4 _dispatch_client_callout + 20
30  libdispatch.dylib             	       0x1a0f4286c _dispatch_block_invoke_direct + 288
31  FrontBoardServices            	       0x1b1e23d58 __FBSSERIALQUEUE_IS_CALLING_OUT_TO_A_BLOCK__ + 52
32  FrontBoardServices            	       0x1b1e23cd8 -[FBSMainRunLoopSerialQueue _targetQueue_performNextIfPossible] + 240
33  FrontBoardServices            	       0x1b1e23bb0 -[FBSMainRunLoopSerialQueue _performNextFromRunLoopSource] + 28
34  CoreFoundation                	       0x19906b834 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 28
35  CoreFoundation                	       0x19906b7c8 __CFRunLoopDoSource0 + 176
36  CoreFoundation                	       0x199069298 __CFRunLoopDoSources0 + 244
37  CoreFoundation                	       0x199068484 __CFRunLoopRun + 828
38  CoreFoundation                	       0x199067cd8 CFRunLoopRunSpecific + 608
39  GraphicsServices              	       0x1ddab51a8 GSEventRunModal + 164
40  UIKitCore                     	       0x19b6a1ae8 -[UIApplication _run] + 888
41  UIKitCore                     	       0x19b755d98 UIApplicationMain + 340
42  Brent                         	       0x104f25734 0x104f20000 + 22324
43  dyld                          	       0x1bc83f154 start + 2356

Code of Conduct

• I agree to follow this project's Code of Conduct

[nan-li]

Hi @iThink32,

Looking at the stacktrace, OneSignal is calling into your app's methods.

[OneSignalNotificationsUNUserNotificationCenter onesignalGetNotificationSettingsWithCompletionHandler:] is calling your completion handler from UNUserNotificationCenter.getNotificationSettings(completionHandler:).

Can you check your completion handler?

[iThink32]

@nan-li thank you for the response, let me check this and get back to you.

[iThink32]

@nan-li UNUserNotificationCenter.getNotificationSettings(completionHandler:) method is not implemented in our code base. Where can I find this?

[nan-li]

Hi @iThink32, were you able to figure anything out with this stacktrace?

The OneSignal OneSignalNotificationsUNUserNotificationCenter class runs to get notification-related features and appears to then trigger code in your app BrentCore. However, the actual crash stems further up from something UIKitCore is doing. It is hard to see what BrentCore is doing due to the crash log not being symbolicated:

14  BrentCore                     	       0x106e2a5b0 0x106c4c000 + 1959344
15  BrentCore                     	       0x106d16610 0x106c4c000 + 828944
16  BrentCore                     	       0x106d167e8 0x106c4c000 + 829416

If you can symbolicate your stacktrace, that will help narrow down what is happening.

[nan-li]

If you can symbolicate your stacktrace, that will help narrow down what is happening.

Closing as I don't believe this crash is caused by the OneSignal SDK and we cannot tell what is happening after OneSignal is done calling [OneSignalNotificationsUNUserNotificationCenter onesignalGetNotificationSettingsWithCompletionHandler:].

If follow up details are provided, we can revisit this.