Reason for crash in iOS

Question

I got this crash from hockeyapp. I dont know what is the reason for this crash.

Please take a look into the crash and Please help if you can find the reason behind it.

Please take a look into thread 8 and thread 12..look like a race condition

Thread 8:
0   libsystem_kernel.dylib               0x3b1a5aa8 semaphore_wait_trap + 8
1   CFNetwork                            0x2ff2186d CFURLConnectionSendSynchronousRequest + 266
2   Foundation                           0x30d0d523 +[NSURLConnection sendSynchronousRequest:returningResponse:error:] + 112
3   SecureTextMessaging                  0x0040b30b -[EPOCWebServiceInvocation makeSynchronousRequestWithError:] + 148
4   SecureTextMessaging                  0x00346a0d -[CDSModule responseFromURL:] + 58
5   SecureTextMessaging                  0x000a5b65 -[STGetGroupsOperation responseForAction] (STGetGroupsOperation.m:37)
6   SecureTextMessaging                  0x0015ab0f -[STSyncOperation runOperation] (STSyncOperation.m:44)
7   SecureTextMessaging                  0x0015a7df -[STSyncOperation main] (STSyncOperation.m:24)
8   Foundation                           0x30caf5ab -[__NSOperationInternal _start:] + 768
9   Foundation                           0x30d5376d __NSOQSchedule_f + 58
10  libdispatch.dylib                    0x3b0e3f11 _dispatch_queue_drain$VARIANT$mp + 486
11  libdispatch.dylib                    0x3b0e3c97 _dispatch_queue_invoke$VARIANT$mp + 40
12  libdispatch.dylib                    0x3b0e4a45 _dispatch_root_queue_drain + 74
13  libdispatch.dylib                    0x3b0e4d29 _dispatch_worker_thread2 + 54
14  libsystem_pthread.dylib              0x3b21fbd3 _pthread_wqthread + 296
15  libsystem_pthread.dylib              0x3b21fa98 start_wqthread + 6

Thread 9:
0   libsystem_kernel.dylib               0x3b1b8c70 __workq_kernreturn + 8
1   libsystem_pthread.dylib              0x3b21fa98 start_wqthread + 6

Thread 10:
0   libsystem_kernel.dylib               0x3b1b8c70 __workq_kernreturn + 8
1   libsystem_pthread.dylib              0x3b21fa98 start_wqthread + 6

Thread 11:
0   libsystem_kernel.dylib               0x3b1b8c70 __workq_kernreturn + 8
1   libsystem_pthread.dylib              0x3b21fa98 start_wqthread + 6

Thread 12:
0   libsystem_kernel.dylib               0x3b1a5aa8 semaphore_wait_trap + 8
1   CFNetwork                            0x2ff2186d CFURLConnectionSendSynchronousRequest + 266
2   Foundation                           0x30d0d523 +[NSURLConnection sendSynchronousRequest:returningResponse:error:] + 112
3   SecureTextMessaging                  0x0040b30b -[EPOCWebServiceInvocation makeSynchronousRequestWithError:] + 148
4   SecureTextMessaging                  0x00102c75 -[STLongPollingManager doClientPollwithMessageDate:andColleagueDate:error:] (STLongPollingManager.m:74)
5   SecureTextMessaging                  0x0001f691 -[STDataManager doClientPoll] (STDataManager.m:371)
6   SecureTextMessaging                  0x0001fde7 __29-[STDataManager doClientPoll]_block_invoke_2 (STDataManager.m:419)
7   Foundation                           0x30cbf3c7 -[NSBlockOperation main] + 128
8   Foundation                           0x30caf5ab -[__NSOperationInternal _start:] + 768
9   Foundation                           0x30d5376d __NSOQSchedule_f + 58
10  libdispatch.dylib                    0x3b0e3f11 _dispatch_queue_drain$VARIANT$mp + 486
11  libdispatch.dylib                    0x3b0e3c97 _dispatch_queue_invoke$VARIANT$mp + 40
12  libdispatch.dylib                    0x3b0e4a45 _dispatch_root_queue_drain + 74
13  libdispatch.dylib                    0x3b0e4d29 _dispatch_worker_thread2 + 54
14  libsystem_pthread.dylib              0x3b21fbd3 _pthread_wqthread + 296
15  libsystem_pthread.dylib              0x3b21fa98 start_wqthread + 6

I didn't see where crash thread. please post full crash log or try this http://stackoverflow.com/questions/25855389/how-to-symbolicate-crash-log-xcode-6 — Huy Nghia, Mar 24 '15 at 09:00
The only problem with that approach would be if the device that has problem is remote and the developer can't access the phone — Miknash, Mar 24 '15 at 09:06
You should post the full crash report. None of the threads you posted yet show the one that actually caused the crash! — Kerni, Mar 24 '15 at 10:00

score 0 · Answer 1 · edited May 23 '17 at 12:28

At the first glance I would say that you have a problem inside

SecureTextMessaging

But there is a little that we could do to help you. I have several suggestions tho.

Try dwarfdump and atos commands. To use these you will need .ipa file you published. From there you have to extract/find .dSYM file. So after you find that file you can try to look up particular addresses like :

SecureTextMessaging                  0x0040b30b -[EPOCWebServiceInvocation makeSynchronousRequestWithError:] + 148

In this example you can take 0x0040b30b. You need to know your architecture as well and after that you can try :

atos -arch armv7 -o STM.app/STM 0x0040b30b

To help you with addresses and everything else here is a very usefull SO question about that:

iOS crash reports: atos not working as expected

atos and dwarfdump won't symbolicate my address

On these links you will find everything you need to know and how to resolve your problem.

Reason for crash in iOS

1 Answers1