ios - What does this SIGTRAP mean? -


i wondering if provide insight causing sigtrap occur. if provide suggestions here debug better, appreciated unable replicate reliably.

hardware model:      ipad mini 3 (ipad4,8) process:         scenedoc [330] path:            /private/var/mobile/containers/bundle/application/1cb3551a-24a3-4fa8-b2ed-8af993f7da43/scenedoc.app/scenedoc identifier:      com.scenedoc.scenedocappappstore code type:       arm64 parent process:  launchd [1]  date/time:       2015-03-23 15:42:57 +0000 launch time:     2015-03-23 15:42:57 +0000 os version:      ios 8.2 (12d508)  exception type:  sigtrap crashed thread:  0  application specific information: *** terminating app due uncaught exception 'sigtrap', reason: ''  thread 0 crashed: 0   corefoundation                0x185629750 _cfhash + 22352 1   corefoundation                0x185625d44 _cfbasichashfindbucket + 7492 2   corefoundation                0x185625900 _cfdictionarygetvalue + 6400 3   corefoundation                0x1856d6658 [cfprefsplistsource alreadylocked_setvalue:forkey:] + 730712 4   corefoundation                0x185784830 [cfprefssource setvalue:forkey:] + 1443888 5   corefoundation                0x185783dc8 [cfprefssource withsourceforidentifier:user:byhost:container:perform:] + 1441224 6   corefoundation                0x185787658 __cfpreferencessetvaluewithcontainer + 1455704 7   foundation                    0x18656b600 [nsuserdefaults(nsuserdefaults) setobject:forkey:] + 128512 8   scenedoc                      0x10025673c [prefs saveprefs] (prefs.m:503) 9   scenedoc                      0x100259e0c [prefs setlogoutduration] (prefs.m:2067) 10  scenedoc                      0x10014a518 [sdcthriftgcdmanager refreshtoken:] (sdcthriftgcdmanager.m:484) 11  uikit                         0x18a1e2444 [uiapplication workspacenoteassertionexpirationimminent:] + 2729028 12  frontboardservices            0x18db31604 ___31-[fbsserialqueue (performasync:0) 13  corefoundation                0x185702d70 ___cfrunloop_is_calling_out_to_a_block__ + 912752 14  corefoundation                0x185701e78 ___cfrunloopdoblocks + 908920 15  corefoundation                0x18570049c ___cfrunlooprun + 902300 16  corefoundation                0x18562d1f4 _cfrunlooprunspecific + 37364 17  graphicsservices              0x18e9776fc _gseventrunmodal + 46844 18  uikit                         0x189fbe10c _uiapplicationmain + 483596 19  scenedoc                      0x1000ceae4 main (main.m:12) 20  libdyld.dylib                 0x196faaa08 _start + 10760  thread 1: 0   libsystem_kernel.dylib        0x1970a8c24 _kevent64 + 3108 1   libdispatch.dylib             0x196f7f99c __dispatch_source_invoke + 14748  thread 2: 0   libsystem_kernel.dylib        0x1970a8e0c _mach_msg_trap + 3596 1   corefoundation                0x185702218 ___cfrunloopservicemachport + 909848 2   corefoundation                0x18570016c ___cfrunlooprun + 901484 3   corefoundation                0x18562d1f4 _cfrunlooprunspecific + 37364 4   corefoundation                0x18567f370 _cfrunlooprun + 373616 5   coremotion                    0x18602fe14 0x185fe8000 + 294420 6   libsystem_pthread.dylib       0x19715fdc8 __pthread_body + 15816 7   libsystem_pthread.dylib       0x19715fd24 __pthread_body + 15652 8   libsystem_pthread.dylib       0x19715cef8 _thread_start + 3832  thread 3: 0   libsystem_kernel.dylib        0x1970a8e0c _mach_msg_trap + 3596 1   corefoundation                0x185702218 ___cfrunloopservicemachport + 909848 2   corefoundation                0x18570016c ___cfrunlooprun + 901484 3   corefoundation                0x18562d1f4 _cfrunlooprunspecific + 37364 4   cfnetwork                     0x18512e2a4 [nsurlconnection(loader) _resourceloadloop:] + 647844 5   foundation                    0x186642308 ___nsthread__main__ + 1008392 6   libsystem_pthread.dylib       0x19715fdc8 __pthread_body + 15816 7   libsystem_pthread.dylib       0x19715fd24 __pthread_body + 15652 8   libsystem_pthread.dylib       0x19715cef8 _thread_start + 3832  thread 4: 0   libsystem_kernel.dylib        0x1970c3498 _select$darwin_extsn + 111768 1   libsystem_pthread.dylib       0x19715fdc8 __pthread_body + 15816 2   libsystem_pthread.dylib       0x19715fd24 __pthread_body + 15652 3   libsystem_pthread.dylib       0x19715cef8 _thread_start + 3832  thread 5: 0   libsystem_kernel.dylib        0x1970c3c78 ___workq_kernreturn + 113784 1   libsystem_pthread.dylib       0x19715cef0 _start_wqthread + 3824  thread 6: 0   libsystem_kernel.dylib        0x1970c3c78 ___workq_kernreturn + 113784 1   libsystem_pthread.dylib       0x19715cef0 _start_wqthread + 3824  thread 0 crashed arm64 thread state:     cpsr: 0x60000000    fp: 0x16fd7a0a0     lr: 0x185625d44     pc: 0x185629750      sp: 0x16fd7a090     x0: 0               x1: 0               x10: 0x1             x11: 0              x12: 0x13e00ceb0    x13: 0x61a5975c10e9    x14: 0x5cd61a0d8643     x15: 0x8c           x16: 0x19692a4d8    x17: 0x1856d65bc    x18: 0               x19: 0              x2: 0x17425fce0     x20: 0x174266f00    x21: 0               x22: 0x16fd7a1f0    x23: 0x17007ffc0    x24: 0x1975c8750    x25: 0x1975cb9c0     x26: 0x19b0d80a8    x27: 0x19b0d4088    x28: 0              x3: 0                x4: 0x16fd7a2c8     x5: 0x2a            x6: 0x2a            x7: 0                x8: 0x5             x9: 0x185629650

the problem seems have originated key somehow being nil when tried set object in nsuserdefaults. interestingly enough, doesn't crash in simulator.


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