title: ios app rejected, they say ipV6 problems; need help identifying the issue
body: <p>Apple rejected my app today, this is what they sent to me:</p>
  
  <p>"We were unable to review your app as it crashed on launch. We have attached detailed crash logs to help troubleshoot this issue.</p>
  
  <p>Next Steps</p>
  
  <p>Please revise your app and test it on a device while connected to an IPv6 network (all apps must support IPv6) to ensure it will launch without crashing."</p>
  
  <pre><code>Incident Identifier: D1567D74-C4CB-464D-945C-5510E22A5E67
  CrashReporter Key:   45e776ed0586d581aba248bf3f23eaf42a231f2c
  Hardware Model:      xxx
  Process:             MyAppiOS [1576]
  Path:                /private/var/containers/Bundle/Application/79C23898-D672-4AA6-BD4C-6EBAE68918FF/xxxxxx.app/xxxxxxiOS
  Identifier:          it.xxxxx.xxxxxx
  Version:             1.3 (1.3)
  Code Type:           ARM-64 (Native)
  Parent Process:      launchd [1]
  
  Date/Time:           2016-07-31 13:37:27.27 -0700
  Launch Time:         2016-07-31 13:37:27.27 -0700
  OS Version:          iOS 9.3.3 (13G34)
  Report Version:      105
  
  Exception Type:  EXC_CRASH (SIGABRT)
  Exception Codes: 0x0000000000000000, 0x0000000000000000
  Exception Note:  EXC_CORPSE_NOTIFY
  Triggered by Thread:  0
  
  Filtered syslog:
  None found
  
  Thread 0 name:  Dispatch queue: com.apple.main-thread
  Thread 0 Crashed:
  0   libsystem_kernel.dylib          0x000000018071c11c 0x180700000 + 114972
  1   libsystem_pthread.dylib         0x00000001807e8ef8 0x1807e4000 + 20216
  2   libsystem_c.dylib               0x000000018068ddc8 0x18062c000 + 400840
  3   MyAppiOS                    0x0000000100ef7b0c 0x10007c000 + 15186700
  4   libsystem_platform.dylib        0x00000001807e194c 0x1807dc000 + 22860
  5   libsystem_pthread.dylib         0x00000001807e8ef8 0x1807e4000 + 20216
  6   libsystem_c.dylib               0x000000018068ddc8 0x18062c000 + 400840
  7   MyAppiOS                    0x0000000100fe8988 0x10007c000 + 16173448
  8   MyAppiOS                    0x0000000100ef805c 0x10007c000 + 15188060
  9   MyAppiOS                    0x0000000100ef7518 0x10007c000 + 15185176
  10  MyAppiOS                    0x0000000100ef6354 0x10007c000 + 15180628
  11  MyAppiOS                    0x0000000100eef2d0 0x10007c000 + 15151824
  12  MyAppiOS                    0x000000010045d178 0x10007c000 + 4067704
  13  MyAppiOS                    0x000000010054cf44 0x10007c000 + 5050180
  14  MyAppiOS                    0x000000010054c998 0x10007c000 + 5048728
  15  MyAppiOS                    0x0000000100a58094 0x10007c000 + 10338452
  16  MyAppiOS                    0x000000010095fd8c 0x10007c000 + 9321868
  17  MyAppiOS                    0x000000010095f57c 0x10007c000 + 9319804
  18  MyAppiOS                    0x00000001002a9cf4 0x10007c000 + 2284788
  19  MyAppiOS                    0x000000010043d364 0x10007c000 + 3937124
  20  MyAppiOS                    0x0000000100f06bf4 0x10007c000 + 15248372
  21  MyAppiOS                    0x0000000100f6a974 0x10007c000 + 15657332
  22  MyAppiOS                    0x0000000100eb0c34 0x10007c000 + 14896180
  23  MyAppiOS                    0x0000000100eb406c 0x10007c000 + 14909548
  24  UIKit                           0x0000000185d4e9c0 0x185cc4000 + 567744
  25  UIKit                           0x0000000185f7e184 0x185cc4000 + 2859396
  26  UIKit                           0x0000000185f825f0 0x185cc4000 + 2876912
  27  UIKit                           0x0000000185f7f764 0x185cc4000 + 2864996
  28  FrontBoardServices              0x00000001825237ac 0x1824fc000 + 161708
  29  FrontBoardServices              0x0000000182523618 0x1824fc000 + 161304
  30  FrontBoardServices              0x00000001825239c8 0x1824fc000 + 162248
  31  CoreFoundation                  0x0000000180b3909c 0x180a58000 + 921756
  32  CoreFoundation                  0x0000000180b38b30 0x180a58000 + 920368
  33  CoreFoundation                  0x0000000180b36830 0x180a58000 + 911408
  34  CoreFoundation                  0x0000000180a60c50 0x180a58000 + 35920
  35  UIKit                           0x0000000185d4794c 0x185cc4000 + 538956
  36  UIKit                           0x0000000185d42088 0x185cc4000 + 516232
  37  MyAppiOS                    0x00000001002e48fc 0x10007c000 + 2525436
  38  MyAppiOS                    0x000000010031bc8c 0x10007c000 + 2751628
  39  MyAppiOS                    0x00000001002a9c28 0x10007c000 + 2284584
  40  MyAppiOS                    0x000000010043d364 0x10007c000 + 3937124
  41  MyAppiOS                    0x0000000100f06bf4 0x10007c000 + 15248372
  42  MyAppiOS                    0x0000000100f6a974 0x10007c000 + 15657332
  43  MyAppiOS                    0x0000000100f6f1fc 0x10007c000 + 15675900
  44  MyAppiOS                    0x0000000100ffa6f4 0x10007c000 + 16246516
  45  MyAppiOS                    0x0000000100ec5050 0x10007c000 + 14979152
  46  libdyld.dylib                   0x00000001805fe8b8 0x1805fc000 + 10424
  
  Thread 1:
  0   libsystem_kernel.dylib          0x000000018071cb48 0x180700000 + 117576
  1   libsystem_pthread.dylib         0x00000001807e5530 0x1807e4000 + 5424
  2   libsystem_pthread.dylib         0x00000001807e5020 0x1807e4000 + 4128
  
  Thread 2 name:  Dispatch queue: com.apple.libdispatch-manager
  Thread 2:
  0   libsystem_kernel.dylib          0x000000018071d4d8 0x180700000 + 120024
  1   libdispatch.dylib               0x00000001805e07d8 0x1805cc000 + 83928
  2   libdispatch.dylib               0x00000001805cf648 0x1805cc000 + 13896
  
  Thread 3:
  0   libsystem_kernel.dylib          0x000000018071cb48 0x180700000 + 117576
  1   libsystem_pthread.dylib         0x00000001807e5530 0x1807e4000 + 5424
  2   libsystem_pthread.dylib         0x00000001807e5020 0x1807e4000 + 4128
  
  Thread 4:
  0   libsystem_kernel.dylib          0x000000018071c41c 0x180700000 + 115740
  1   libsystem_c.dylib               0x000000018063922c 0x18062c000 + 53804
  2   libc++.1.dylib                  0x00000001801b13b4 0x18016c000 + 283572
  3   JavaScriptCore                  0x000000018477a698 0x1841f8000 + 5777048
  4   JavaScriptCore                  0x000000018477a348 0x1841f8000 + 5776200
  5   JavaScriptCore                  0x000000018477cae0 0x1841f8000 + 5786336
  6   JavaScriptCore                  0x000000018477ca70 0x1841f8000 + 5786224
  7   libsystem_pthread.dylib         0x00000001807e7b28 0x1807e4000 + 15144
  8   libsystem_pthread.dylib         0x00000001807e7a8c 0x1807e4000 + 14988
  9   libsystem_pthread.dylib         0x00000001807e5028 0x1807e4000 + 4136
  
  Thread 5 name:  WebThread
  Thread 5:
  0   libsystem_kernel.dylib          0x0000000180700fd8 0x180700000 + 4056
  1   libsystem_kernel.dylib          0x0000000180700e54 0x180700000 + 3668
  2   CoreFoundation                  0x0000000180b38c60 0x180a58000 + 920672
  3   CoreFoundation                  0x0000000180b36964 0x180a58000 + 911716
  4   CoreFoundation                  0x0000000180a60c50 0x180a58000 + 35920
  5   WebCore                         0x0000000184a46108 0x1849d0000 + 483592
  6   libsystem_pthread.dylib         0x00000001807e7b28 0x1807e4000 + 15144
  7   libsystem_pthread.dylib         0x00000001807e7a8c 0x1807e4000 + 14988
  8   libsystem_pthread.dylib         0x00000001807e5028 0x1807e4000 + 4136
  
  Thread 6:
  0   libsystem_kernel.dylib          0x0000000180701014 0x180700000 + 4116
  1   MyAppiOS                    0x0000000100fd4784 0x10007c000 + 16091012
  2   MyAppiOS                    0x0000000100f34c20 0x10007c000 + 15436832
  3   MyAppiOS                    0x0000000100fb62dc 0x10007c000 + 15966940
  4   MyAppiOS                    0x0000000100fd517c 0x10007c000 + 16093564
  5   libsystem_pthread.dylib         0x00000001807e7b28 0x1807e4000 + 15144
  6   libsystem_pthread.dylib         0x00000001807e7a8c 0x1807e4000 + 14988
  7   libsystem_pthread.dylib         0x00000001807e5028 0x1807e4000 + 4136
  
  Thread 7:
  0   libsystem_kernel.dylib          0x000000018071cb48 0x180700000 + 117576
  1   libsystem_pthread.dylib         0x00000001807e5530 0x1807e4000 + 5424
  2   libsystem_pthread.dylib         0x00000001807e5020 0x1807e4000 + 4128
  
  Thread 8:
  0   libsystem_kernel.dylib          0x000000018071bf24 0x180700000 + 114468
  1   libsystem_pthread.dylib         0x00000001807e6ce8 0x1807e4000 + 11496
  2   MyAppiOS                    0x0000000100fbadc0 0x10007c000 + 15986112
  3   MyAppiOS                    0x0000000100fc69c4 0x10007c000 + 16034244
  4   MyAppiOS                    0x0000000100fb1d98 0x10007c000 + 15949208
  5   MyAppiOS                    0x00000001003e9910 0x10007c000 + 3594512
  6   MyAppiOS                    0x000000010054c7e4 0x10007c000 + 5048292
  7   MyAppiOS                    0x000000010054c88c 0x10007c000 + 5048460
  8   MyAppiOS                    0x000000010054c13c 0x10007c000 + 5046588
  9   MyAppiOS                    0x000000010054ab78 0x10007c000 + 5041016
  10  MyAppiOS                    0x000000010043d364 0x10007c000 + 3937124
  11  MyAppiOS                    0x0000000100f06bf4 0x10007c000 + 15248372
  12  MyAppiOS                    0x0000000100f6a974 0x10007c000 + 15657332
  13  MyAppiOS                    0x0000000100fb6344 0x10007c000 + 15967044
  14  MyAppiOS                    0x0000000100fd517c 0x10007c000 + 16093564
  15  libsystem_pthread.dylib         0x00000001807e7b28 0x1807e4000 + 15144
  16  libsystem_pthread.dylib         0x00000001807e7a8c 0x1807e4000 + 14988
  17  libsystem_pthread.dylib         0x00000001807e5028 0x1807e4000 + 4136
  
  Thread 9:
  0   libsystem_kernel.dylib          0x000000018071bf24 0x180700000 + 114468
  1   libsystem_pthread.dylib         0x00000001807e6ce8 0x1807e4000 + 11496
  2   MyAppiOS                    0x0000000100fbadc0 0x10007c000 + 15986112
  3   MyAppiOS                    0x0000000100fc69c4 0x10007c000 + 16034244
  4   MyAppiOS                    0x0000000100f621f4 0x10007c000 + 15622644
  5   MyAppiOS                    0x00000001003e8318 0x10007c000 + 3588888
  6   MyAppiOS                    0x000000010054a3dc 0x10007c000 + 5039068
  7   MyAppiOS                    0x00000001003b5698 0x10007c000 + 3380888
  8   MyAppiOS                    0x00000001003b5460 0x10007c000 + 3380320
  9   MyAppiOS                    0x0000000100601e80 0x10007c000 + 5791360
  10  MyAppiOS                    0x0000000100601d18 0x10007c000 + 5791000
  11  MyAppiOS                    0x0000000100601c3c 0x10007c000 + 5790780
  12  MyAppiOS                    0x0000000100e60788 0x10007c000 + 14567304
  13  MyAppiOS                    0x000000010054ab78 0x10007c000 + 5041016
  14  MyAppiOS                    0x000000010043d364 0x10007c000 + 3937124
  15  MyAppiOS                    0x0000000100f06bf4 0x10007c000 + 15248372
  16  MyAppiOS                    0x0000000100f6a974 0x10007c000 + 15657332
  17  MyAppiOS                    0x0000000100fb6344 0x10007c000 + 15967044
  18  MyAppiOS                    0x0000000100fd517c 0x10007c000 + 16093564
  19  libsystem_pthread.dylib         0x00000001807e7b28 0x1807e4000 + 15144
  20  libsystem_pthread.dylib         0x00000001807e7a8c 0x1807e4000 + 14988
  21  libsystem_pthread.dylib         0x00000001807e5028 0x1807e4000 + 4136
  
  Thread 0 crashed with ARM Thread State (64-bit):
      x0: 0x0000000000000000   x1: 0x0000000000000000   x2: 0x0000000000000000   x3: 0x0000000180748664
      x4: 0x0000000000000043   x5: 0x0000000000000041   x6: 0x0000000000000000   x7: 0x0000000000000fa0
      x8: 0x0000000008000000   x9: 0x0000000004000000  x10: 0x0000000136790000  x11: 0x0000000000003fff
     x12: 0x000000013678c000  x13: 0x0000000000003fff  x14: 0xffffffffffffc000  x15: 0x0000000000003fff
     x16: 0x0000000000000148  x17: 0x0000000000000000  x18: 0x0000000000000000  x19: 0x0000000000000006
     x20: 0x000000019ede5000  x21: 0x0000000101489d45  x22: 0x0000000101489e0c  x23: 0x4900c357811c5df7
     x24: 0x000000016fd7fd28  x25: 0x0000000101489dbf  x26: 0x0000000137916b60  x27: 0x0000000000000001
     x28: 0x000000013683ae00  fp: 0x000000016fd7fcc0   lr: 0x00000001807e8ef8
      sp: 0x000000016fd7fca0   pc: 0x000000018071c11c cpsr: 0x00000000
  </code></pre>
  
  <p>you can see complete log file they sent to me <a href="https://drive.google.com/open?id=0B4aGvecMFcFWdHM3M1g2YWV3UVU" rel="nofollow">here</a></p>
  
  <p>Many thanks for your interest to my question</p>