app works in xcode, and in release for all devices but iphone 6s

Question

I have an application that is published in the app store, and it works for all devices except when a 6s is used, the app immediately crashes. What is even more bizarre is it works completely fine in simulator for 6s, I have no idea what to do. Here is some information from a crash log. If any one has experienced this issue and fixed it before, please let me know. Thank you very much.Exception Type:  EXC_CRASH (SIGABRT)Exception Codes: 0x0000000000000000, 0x0000000000000000Exception Note:  EXC_CORPSE_NOTIFYTriggered by Thread:  0Filtered syslog:None foundLast Exception Backtrace:(0x182f74f48 0x19841ff80 0x182f74e18 0x183e68a1c 0x1001695e8 0x100169054 0x198420fc8 0x1984278f8 0x198431db8 0x1001763e4 0x10017b2fc 0x10017dda8 0x10017f7f0 0x198a90668 0x198a8d330 0x198a8be78 0x10017c9ac 0x10017b978 0x100186edc 0x100186980 0x100185ee4 0x10012cd80 0x10012d1d4 0x188508098 0x188507c9c 0x188dcccec 0x188c2af20 0x188c2ad24 0x188c2afec 0x188507ee4 0x188507c9c 0x1000ecf64 0x1000eb9d0 0x1000eba68 0x100142034 0x1001408cc 0x18857d324 0x1887abacc 0x1887afe0c 0x1887acf50 0x18d0db7c4 0x18d0dbb44 0x182f2c544 0x182f2bfd8 0x182f29cd8 0x182e58ca0 0x1885761c8 0x188570ffc 0x100141bbc 0x198c628b8)Global Trace Buffer (reverse chronological seconds):6148914689.413271 CFNetwork                     0x0000000182719034 TCP Conn 0x136ecc0d0 started6148914689.418420 CFNetwork                     0x000000018276e608 Creating default cookie storage with default identifier6148914689.418420 CFNetwork                     0x000000018276e5d4 Faulting in CFHTTPCookieStorage singleton6148914689.418420 CFNetwork                     0x00000001827c0394 Faulting in NSHTTPCookieStorage singletonThread 0 name:  Dispatch queue: com.apple.main-threadThread 0 Crashed:0   libsystem_kernel.dylib            0x0000000198d7f140 0x198d64000 + 1109121   libsystem_pthread.dylib           0x0000000198e48ef8 0x198e44000 + 202162   libsystem_c.dylib                 0x0000000198cf2b78 0x198c90000 + 4043443   libc++abi.dylib                   0x0000000197a893f4 0x197a88000 + 51084   libc++abi.dylib                   0x0000000197aa5e98 0x197a88000 + 1225205   libobjc.A.dylib                   0x0000000198420248 0x198418000 + 333526   libc++abi.dylib                   0x0000000197aa2f44 0x197a88000 + 1104047   libc++abi.dylib                   0x0000000197aa285c 0x197a88000 + 1086368   libobjc.A.dylib                   0x0000000198420094 0x198418000 + 329169   CoreFoundation                    0x0000000182f74e18 0x182e50000 + 119964010  Foundation                        0x0000000183e68a1c 0x183dc4000 + 67433211  ChatZone                          0x00000001001695e8 0x1000e4000 + 54628012  ChatZone                          0x0000000100169054 0x1000e4000 + 54485213  libobjc.A.dylib                   0x0000000198420fc8 0x198418000 + 3680814  libobjc.A.dylib                   0x00000001984278f8 0x198418000 + 6373615  libobjc.A.dylib                   0x0000000198431db8 0x198418000 + 10591216  ChatZone                          0x00000001001763e4 0x1000e4000 + 59901217  ChatZone                          0x000000010017b2fc 0x1000e4000 + 61926018  ChatZone                          0x000000010017dda8 0x1000e4000 + 63018419  ChatZone                          0x000000010017f7f0 0x1000e4000 + 63691220  libxml2.2.dylib                   0x0000000198a90668 0x198a88000 + 3440821  libxml2.2.dylib                   0x0000000198a8d330 0x198a88000 + 2129622  libxml2.2.dylib                   0x0000000198a8be78 0x198a88000 + 1599223  ChatZone                          0x000000010017c9ac 0x1000e4000 + 62506824  ChatZone                          0x000000010017b978 0x1000e4000 + 62092025  ChatZone                          0x0000000100186edc 0x1000e4000 + 66735626  ChatZone                          0x0000000100186980 0x1000e4000 + 66598427  ChatZone                          0x0000000100185ee4 0x1000e4000 + 66326828  ChatZone                          0x000000010012cd80 0x1000e4000 + 29836829  ChatZone                          0x000000010012d1d4 0x1000e4000 + 29947630  UIKit                             0x0000000188508098 0x1884f0000 + 9845631  UIKit                             0x0000000188507c9c 0x1884f0000 + 9743632  UIKit                             0x0000000188dcccec 0x1884f0000 + 929303633  UIKit                             0x0000000188c2af20 0x1884f0000 + 758147234  UIKit                             0x0000000188c2ad24 0x1884f0000 + 758096435  UIKit                             0x0000000188c2afec 0x1884f0000 + 758167636  UIKit                             0x0000000188507ee4 0x1884f0000 + 9802037  UIKit                             0x0000000188507c9c 0x1884f0000 + 9743638  ChatZone                          0x00000001000ecf64 0x1000e4000 + 3670839  ChatZone                          0x00000001000eb9d0 0x1000e4000 + 3118440  ChatZone                          0x00000001000eba68 0x1000e4000 + 3133641  ChatZone                          0x0000000100142034 0x1000e4000 + 38507642  ChatZone                          0x00000001001408cc 0x1000e4000 + 37908443  UIKit                             0x000000018857d324 0x1884f0000 + 57834044  UIKit                             0x00000001887abacc 0x1884f0000 + 286586845  UIKit                             0x00000001887afe0c 0x1884f0000 + 288308446  UIKit                             0x00000001887acf50 0x1884f0000 + 287112047  FrontBoardServices                0x000000018d0db7c4 0x18d0b4000 + 16173248  FrontBoardServices                0x000000018d0dbb44 0x18d0b4000 + 16262849  CoreFoundation                    0x0000000182f2c544 0x182e50000 + 90246850  CoreFoundation                    0x0000000182f2bfd8 0x182e50000 + 90108051  CoreFoundation                    0x0000000182f29cd8 0x182e50000 + 89212052  CoreFoundation                    0x0000000182e58ca0 0x182e50000 + 3600053  UIKit                             0x00000001885761c8 0x1884f0000 + 54932054  UIKit                             0x0000000188570ffc 0x1884f0000 + 52838055  ChatZone                          0x0000000100141bbc 0x1000e4000 + 38393256  libdyld.dylib                     0x0000000198c628b8 0x198c60000 + 10424Thread 1:0   libsystem_kernel.dylib            0x0000000198d7fb6c 0x198d64000 + 1135161   libsystem_pthread.dylib           0x0000000198e45530 0x198e44000 + 54242   libsystem_pthread.dylib           0x0000000198e45020 0x198e44000 + 4128Thread 2 name:  Dispatch queue: com.apple.libdispatch-managerThread 2:0   libsystem_kernel.dylib            0x0000000198d804fc 0x198d64000 + 1159641   libdispatch.dylib                 0x0000000198c44a04 0x198c30000 + 844842   libdispatch.dylib                 0x0000000198c33874 0x198c30000 + 14452Thread 3:0   libsystem_kernel.dylib            0x0000000198d7fb6c 0x198d64000 + 1135161   libsystem_pthread.dylib           0x0000000198e45530 0x198e44000 + 54242   libsystem_pthread.dylib           0x0000000198e45020 0x198e44000 + 4128Thread 4 name:  Dispatch queue: com.apple.CoreLocation.ConnectionClient.0x136ed60a0.eventsThread 4:0   libsystem_kernel.dylib            0x0000000198d64a94 0x198d64000 + 27081   libdispatch.dylib                 0x0000000198c425c0 0x198c30000 + 752002   CoreLocation                      0x00000001836fed94 0x1836fc000 + 116683   CoreLocation                      0x0000000183703808 0x1836fc000 + 307284   CoreLocation                      0x000000018373df28 0x1836fc000 + 2701205   CoreLocation                      0x000000018373bb7c 0x1836fc000 + 2609886   CoreLocation                      0x000000018373bab0 0x1836fc000 + 2607847   CoreLocation                      0x000000018373ccfc 0x1836fc000 + 2654688   libxpc.dylib                      0x0000000198e793b0 0x198e74000 + 214249   libxpc.dylib                      0x0000000198e77158 0x198e74000 + 1263210  libdispatch.dylib                 0x0000000198c317a4 0x198c30000 + 605211  libdispatch.dylib                 0x0000000198c35a90 0x198c30000 + 2318412  libdispatch.dylib                 0x0000000198c3d8c0 0x198c30000 + 5548813  libdispatch.dylib                 0x0000000198c34ba4 0x198c30000 + 1936414  libdispatch.dylib                 0x0000000198c3d8c0 0x198c30000 + 5548815  libdispatch.dylib                 0x0000000198c351ac 0x198c30000 + 2090816  libdispatch.dylib                 0x0000000198c3d8c0 0x198c30000 + 5548817  libdispatch.dylib                 0x0000000198c351ac 0x198c30000 + 2090818  libdispatch.dylib                 0x0000000198c316a8 0x198c30000 + 580019  libdispatch.dylib                 0x0000000198c3fb40 0x198c30000 + 6432020  libdispatch.dylib                 0x0000000198c3f2dc 0x198c30000 + 6217221  libsystem_pthread.dylib           0x0000000198e45470 0x198e44000 + 523222  libsystem_pthread.dylib           0x0000000198e45020 0x198e44000 + 4128Thread 5:0   libsystem_kernel.dylib            0x0000000198d7fb6c 0x198d64000 + 1135161   libsystem_pthread.dylib           0x0000000198e45530 0x198e44000 + 54242   libsystem_pthread.dylib           0x0000000198e45020 0x198e44000 + 4128Thread 6:0   libsystem_kernel.dylib            0x0000000198d7fb6c 0x198d64000 + 1135161   libsystem_pthread.dylib           0x0000000198e45530 0x198e44000 + 54242   libsystem_pthread.dylib           0x0000000198e45020 0x198e44000 + 4128Thread 7 name:  com.apple.NSURLConnectionLoaderThread 7:0   libsystem_kernel.dylib            0x0000000198d64a40 0x198d64000 + 26241   libsystem_kernel.dylib            0x0000000198d648bc 0x198d64000 + 22362   CoreFoundation                    0x0000000182f2c108 0x182e50000 + 9013843   CoreFoundation                    0x0000000182f29e0c 0x182e50000 + 8924284   CoreFoundation                    0x0000000182e58ca0 0x182e50000 + 360005   CFNetwork                         0x00000001826f1b84 0x182644000 + 7115566   Foundation                        0x0000000183eb7c80 0x183dc4000 + 9985287   libsystem_pthread.dylib           0x0000000198e47b28 0x198e44000 + 151448   libsystem_pthread.dylib           0x0000000198e47a8c 0x198e44000 + 149889   libsystem_pthread.dylib           0x0000000198e45028 0x198e44000 + 4136Thread 0 crashed with ARM Thread State (64-bit):   x0: 0x0000000000000000   x1: 0x0000000000000000   x2: 0x0000000000000000   x3: 0x0000000136eedb17   x4: 0x0000000197aa6e02   x5: 0x000000016fd149f0   x6: 0x000000000000006e   x7: 0x0000000000000f80   x8: 0x0000000008000000   x9: 0x0000000004000000  x10: 0x0000000000000000  x11: 0x0000000000000010  x12: 0x0000000000000000  x13: 0x0000000000000002  x14: 0x0000000000000000  x15: 0x0000030000000300  x16: 0x0000000000000148  x17: 0x0000000000000000  x18: 0x0000000000000000  x19: 0x0000000000000006  x20: 0x000000019f79f000  x21: 0x000000016fd149f0  x22: 0x0000000136eecd40  x23: 0x0000000000000000  x24: 0x0000000000000001  x25: 0x0000000136ee9e50  x26: 0x00000001378290e4  x27: 0x0000000137829032  x28: 0x000000000000002d  fp: 0x000000016fd14950   lr: 0x0000000198e48ef8   sp: 0x000000016fd14930   pc: 0x0000000198d7f140 cpsr: 0x00000000

Floating Wrench · Answer

You will need to symbolicate your crash log before you or anyone else can determine the source of the crash.Lines like this:11  ChatZone                          0x00000001001695e8 0x1000e4000 + 546280Should look something like this:11 ChatZone                           [MyChatZoneObject aMethodCallCausingACrash]

KMT · Answer

&amp;gt;What is even more bizarre is it works completely fine in simulator for 6s,Not bizarre at all. The simulator is not an emulator and does not provide full testing support - it runs a stack designed for your computer, and as such is never a promise of device compatibility for your app. So while sims can be a way to test basic UI/navigation, device testing is otherwise recommended.As well, when asking for help, if you&#x27;ve tested on a device, responses can be more targeted and applicable. Remember, users won&#x27;t be using a simulator - don&#x27;t ask them to test for you.

Floating Wrench · Answer

I would suggest in your case the easiest way to catch and fix the crash is to run it interactively from Xcode on an iPhone 6s.