Several different problems during TC initialization produce app crashes

[Kerstin2020]

We face several different serious problem caused by TC and let our app crash.
These crashes seams to happen during initialization of TagCommander instance during the first 3 seconds during the startup of the app.

The crashes happen sporadically in various SDK/Core version (including latest)

1. TCHTTPOperation.m line 61 (90x during the last 7 days)
2. TCDynamicStore.m line 52 (38x during the last 7 days)
3. TCDynamicStore.m line 37 (16x during the last 7 days)
4. TCDynamicStore.m line 49 (5x during the last 7 days)
5. TCDynamicStore.m line 47 (5x during the last 7 days)
6. TCDynamicStore.m line 58 (3x during the last 7 days)

One finding is, that you have a problem with concurrency problem accessing values.

Here are some details I know about the stack traces. A bit difficult because TC is acting in different thread

1. Fatal Exception: NSInvalidArgumentException
   [__NSCFNumber hasPrefix:]: unrecognized selector sent to instance 0x99fb4c6b00c2ef4c

CoreFoundation  __exceptionPreprocess
libobjc.A.dylib objc_exception_throw
CoreFoundation  +[NSObject(NSObject) _copyDescription]
CoreFoundation  ___forwarding___
CoreFoundation  _CF_forwarding_prep_0
TCCore  TCHTTPOperation.m - Line 61 -[TCHTTPOperation main] + 61

Calling stack by us (myApp):

TCCore  TCCoreVariables.m - Line 185    -[TCCoreVariables userAgent] + 185
TCCore  TCCoreVariables.m - Line 36     -[TCCoreVariables init] + 36
TCCore  TCCoreVariables.m - Line 19     __33+[TCCoreVariables sharedInstance]_block_invoke + 19
libdispatch.dylib                       _dispatch_client_callout + 20
libdispatch.dylib                       _dispatch_once_callout + 32
TCCore  once.h - Line 84                +[TCCoreVariables sharedInstance] + 84
TCCore  TCCoreInitialisation.m - Line 23-[TCCoreInitialisation init] + 23
TCSDK   TCSDKInitialisation.m - Line 26 -[TCSDKInitialisation init] + 26
TCSDK   TagCommander.m - Line 169       -[TagCommander initWithSiteID:containerID:notificationCenter:andDefaultBehaviour:] + 169
TCSDK   TagCommander.m - Line 144       -[TagCommander initWithSiteID:andContainerID:] + 144
myApp   TrackingService.swift - Line 138 specialized TrackingService.tagCommanderInstance.getter + 138

2. EXC_BAD_ACCESS KERN_INVALID_ADDRESS (Heap Damage?)

libobjc.A.dylib   objc_msgSend + 8
CoreFoundation    mdict_rehashd + 180
CoreFoundation                          -[__NSDictionaryM setObject:forKeyedSubscript:] + 836
TCCore  TCDynamicStore.m - Line 52      -[TCDynamicStore addData:withValue:] + 52
TCSDK   TCPredefinedVariables.m - Line 1585 -[TCPredefinedVariables addData:withValue:] + 1585
TCSDK   TCPredefinedVariables.m - Line 201  -[TCPredefinedVariables setVisitorIDCurrentCallUniqueID] + 201
TCSDK   TCPredefinedVariables.m - Line 107  -[TCPredefinedVariables predefinedVariableInitialisation] + 107
TCSDK   TCPredefinedVariables.m - Line 58   -[TCPredefinedVariables init] + 58
TCSDK   TCPredefinedVariables.m - Line 26   __39+[TCPredefinedVariables sharedInstance]_block_invoke + 26
libdispatch.dylib  _dispatch_client_callout + 16
libdispatch.dylib   _dispatch_once_callout + 28
TCSDK   once.h - Line 84                +[TCPredefinedVariables sharedInstance] + 84
TCSDK   TCSDKInitialisation.m - Line 28 -[TCSDKInitialisation init] + 28
TCSDK   TagCommander.m - Line 169       -[TagCommander initWithSiteID:containerID:notificationCenter:andDefaultBehaviour:] + 169
TCSDK   TagCommander.m - Line 144       -[TagCommander initWithSiteID:andContainerID:] + 144
myApp   TrackingService.swift - Line 138    specialized TrackingService.tagCommanderInstance.getter + 138

ATTENTION: another TC thread was sending data synchronous in parallel

TCCore  TCHTTPOperation.m - Line 182    -[TCHTTPOperation sendSynchronousRequest:withResponse:withError:] + 182
TCCore  TCHTTPOperation.m - Line 80     -[TCHTTPOperation main] + 80

3)Fatal Exception: NSGenericException
*** Collection <__NSArrayM: 0x282d759b0> was mutated while being enumerated.

CoreFoundation __exceptionPreprocess
CoreFoundation  -[__NSSingleObjectEnumerator init]
TCCore  TCDynamicStore.m - Line 37         -[TCDynamicStore addData:] + 37
TCSDK   TCPredefinedVariables.m - Line 1579 -[TCPredefinedVariables addData:] + 1579
TCSDK   TCSDKInitialisation.m - Line 29     -[TCSDKInitialisation init] + 29
TCSDK   TagCommander.m - Line 169           -[TagCommander initWithSiteID:containerID:notificationCenter:andDefaultBehaviour:] + 169
TCSDK   TagCommander.m - Line 144           -[TagCommander initWithSiteID:andContainerID:] + 144
myApp   TrackingService.swift - Line 138    specialized TrackingService.tagCommanderInstance.getter + 138

ATTENTION: another TC thread was sending data synchronous in parallel

TCCore  TCHTTPOperation.m - Line 182    -[TCHTTPOperation sendSynchronousRequest:withResponse:withError:] + 182
TCCore  TCHTTPOperation.m - Line 80     -[TCHTTPOperation main] + 80

4. SIGBART ABORT (Heap Damage?)

libsystem_kernel.dylib  __pthread_kill + 8
libsystem_pthread.dylib pthread_kill + 208
libsystem_c.dylib       abort + 124
libsystem_malloc.dylib  _malloc_put + 546
libsystem_malloc.dylib  malloc_report + 60
libsystem_malloc.dylib  free + 284
CoreFoundation  -[__NSArrayM insertObject:atIndex:] + 348
TCCore  TCDynamicStore.m - Line 49      -[TCDynamicStore addData:withValue:] + 49
TCSDK   TCPredefinedVariables.m - Line 400  -[TCPredefinedVariables setModelAndVersion] + 400
TCSDK   TCPredefinedVariables.m - Line 121  -[TCPredefinedVariables predefinedVariableInitialisation] + 121
TCSDK   TCPredefinedVariables.m - Line 58   -[TCPredefinedVariables init] + 58
TCSDK   TCPredefinedVariables.m - Line 26   __39+[TCPredefinedVariables sharedInstance]_block_invoke + 26
libdispatch.dylib   _dispatch_client_callout + 16
libdispatch.dylib   _dispatch_once_callout + 28
TCSDK   once.h - Line 84                    +[TCPredefinedVariables sharedInstance] + 84
TCSDK   TCSDKInitialisation.m - Line 28     -[TCSDKInitialisation init] + 28
TCSDK   TagCommander.m - Line 169           -[TagCommander initWithSiteID:containerID:notificationCenter:andDefaultBehaviour:] + 169
TCSDK   TagCommander.m - Line 144           -[TagCommander initWithSiteID:andContainerID:] + 144
myApp   TrackingService.swift - Line 138    specialized TrackingService.tagCommanderInstance.getter + 138

5. EXC_BAD_ACCESS KERN_INVALID_ADDRESS

libobjc.A.dylib objc_msgSend + 8
CoreFoundation  -[__NSDictionaryM objectForKeyedSubscript:] + 180
TCCore  TCDynamicStore.m - Line 47          -[TCDynamicStore addData:withValue:] + 47
TCSDK   TCPredefinedVariables.m - Line 1585 -[TCPredefinedVariables addData:withValue:] + 1585
TCSDK   TCPredefinedVariables.m - Line 1116 -[TCPredefinedVariables initLastCallLastVisit] + 1116
TCSDK   TCPredefinedVariables.m - Line 105  -[TCPredefinedVariables predefinedVariableInitialisation] + 105
TCSDK   TCPredefinedVariables.m - Line 58   -[TCPredefinedVariables init] + 58
TCSDK   TCPredefinedVariables.m - Line 26   __39+[TCPredefinedVariables sharedInstance]_block_invoke + 26
libdispatch.dylib   _dispatch_client_callout + 16
libdispatch.dylib   _dispatch_once_callout + 28
TCSDK   once.h - Line 84                    +[TCPredefinedVariables sharedInstance] + 84
TCSDK   TCSDKInitialisation.m - Line 28     -[TCSDKInitialisation init] + 28
TCSDK   TagCommander.m - Line 169           -[TagCommander initWithSiteID:containerID:notificationCenter:andDefaultBehaviour:] + 169
TCSDK   TagCommander.m - Line 144           -[TagCommander initWithSiteID:andContainerID:] + 144
myApp   TrackingService.swift - Line 138    specialized TrackingService.tagCommanderInstance.getter + 138

ATTENTION: another TC thread was sending data synchronous in parallel

TCCore  TCHTTPOperation.m - Line 182    -[TCHTTPOperation sendSynchronousRequest:withResponse:withError:] + 182
TCCore  TCHTTPOperation.m - Line 80     -[TCHTTPOperation main] + 80

6. EXC_BAD_ACCESS KERN_INVALID_ADDRESS

libobjc.A.dylib objc_msgSend + 8
CoreFoundation  -[__NSDictionaryM objectForKeyedSubscript:] + 180
TCCore  TCDynamicStore.m - Line 58          -[TCDynamicStore getData:] + 58
TCCore  TCDynamicStore.m - Line 39          -[TCDynamicStore addData:] + 39
TCSDK   TCPredefinedVariables.m - Line 1579 -[TCPredefinedVariables addData:] + 1579
TCSDK   TCSDKInitialisation.m - Line 29     -[TCSDKInitialisation init] + 29
TCSDK   TagCommander.m - Line 169           -[TagCommander initWithSiteID:containerID:notificationCenter:andDefaultBehaviour:] + 169
TCSDK   TagCommander.m - Line 144           -[TagCommander initWithSiteID:andContainerID:] + 144
myApp   TrackingService.swift - Line 138    specialized TrackingService.tagCommanderInstance.getter + 138

[CommandersAct]

Hello !
We tried looking into it but couldn't exactly reproduce anything.

Could you explain us in detail how you are using those SDKs?

The SDK should not send anything by itself before it's initialized. So it seems to me that you're trying to send a hit in a thread and initialise the SDK in another thread. But not sure how'd you do that.