xcode - How to read Crash log and find clue on Xamarin.forms' iOS? -


i'm making app using xf pcl. on ios app, crashes while it's on background.

i found crash log on iphone , look. it's hard understand nor find problem.

here crash log. there nothing code xamarins's api or native api.

i believe code cause problem couldn't find start line. can crash log?

thanks.

incident identifier: ce060e55-0908-4bb9-ad6------ crashreporter key:   ccb636455a06b10ce38a22cdae9e204f4b28e79c hardware model:      iphone9,3 process:             allbx.ios [337] path:                /private/var/containers/bundle/application/-----30b1-4f7a-a5ec-----/allbx.ios.app/allbx.ios identifier:          com.----.allb version:             69 (1.1.0) code type:           arm-64 (native) role:                non ui parent process:      launchd [1] coalition:           com.----.allb [427]   date/time:           2016-11-17 17:06:31.4329 +0900 launch time:         2016-11-17 16:37:02.7326 +0900 os version:          iphone os 10.1.1 (14b100) report version:      104  exception type:  exc_crash (sigabrt) exception codes: 0x0000000000000000, 0x0000000000000000 exception note:  exc_corpse_notify triggered thread:  0  application specific information: abort() called  filtered syslog: none found  thread 0 name:  tid_403  dispatch queue: com.apple.main-thread thread 0 crashed: 0   libsystem_kernel.dylib          0x000000018ffa2014 __pthread_kill + 8 1   libsystem_pthread.dylib         0x000000019006a450 pthread_kill + 112 2   libsystem_c.dylib               0x000000018ff163e0 abort + 140 3   allbx.ios                       0x000000010024cab0 mono_handle_native_sigsegv (mini-exceptions.c:2420) 4   libsystem_platform.dylib        0x0000000190064348 _sigtramp + 52 5   libsystem_pthread.dylib         0x000000019006a450 pthread_kill + 112 6   libsystem_c.dylib               0x000000018ff163e0 abort + 140 7   allbx.ios                       0x0000000100354bd0 print_all_exceptions(monoobject*) (runtime.m:997) 8   allbx.ios                       0x000000010024d1e8 mono_invoke_unhandled_exception_hook (mini-exceptions.c:2873) 9   allbx.ios                       0x000000010024c744 mono_handle_exception_internal (mini-exceptions.c:1798) 10  allbx.ios                       0x000000010024b824 mono_handle_exception (mini-exceptions.c:2027) 11  allbx.ios                       0x0000000100244348 mono_arm_throw_exception (exceptions-arm64.c:390) 12  allbx.ios                       0x0000000100a78cb8 throw_exception + 168 13  allbx.ios                       0x000000010025b630 mono_magic_trampoline (mini-trampolines.c:833) 14  allbx.ios                       0x0000000100a77d9c generic_trampoline_jit + 252 15  allbx.ios                       0x0000000100a31274 wrapper_managed_to_native_object___icall_wrapper_ves_icall_array_new_specific_intptr_int + 180 16  allbx.ios                       0x0000000100e09db8 system_collections_generic_queue_1_t_ref_setcapacity_int (queue.cs:314) 17  allbx.ios                       0x0000000100e09418 system_collections_generic_queue_1_t_ref_enqueue_t_ref (queue.cs:207) 18  allbx.ios                       0x0000000101922e40 xamarin_forms_element__visibledescendantsd__95_movenext (/c:\buildagent2\work\ca3766cfc22354a1\xamarin.forms.core\element.cs:500) 19  allbx.ios                       0x00000001018bb8a4 xamarin_forms_layout_shouldlayoutchildren (/c:\buildagent2\work\ca3766cfc22354a1\xamarin.forms.core\layout.cs:423) 20  allbx.ios                       0x00000001018b8594 xamarin_forms_layout_updatechildrenlayout (/c:\buildagent2\work\ca3766cfc22354a1\xamarin.forms.core\layout.cs:211) 21  allbx.ios                       0x00000001018b8350 xamarin_forms_layout_onsizeallocated_double_double (/c:\buildagent2\work\ca3766cfc22354a1\xamarin.forms.core\layout.cs:195) 22  allbx.ios                       0x00000001018c8ff8 xamarin_forms_visualelement_sizeallocated_double_double (/c:\buildagent2\work\ca3766cfc22354a1\xamarin.forms.core\visualelement.cs:630) 23  allbx.ios                       0x0000000101923a08 xamarin_forms_layout__c__onchildmeasureinvalidatedb__39_0 (/c:\buildagent2\work\ca3766cfc22354a1\xamarin.forms.core\layout.cs:326) 24  allbx.ios                       0x0000000101ead8e4 foundation_nsasyncactiondispatcher_apply (nsaction.cs:163) 25  allbx.ios                       0x0000000100a2c5d4 wrapper_runtime_invoke_object_runtime_invoke_dynamic_intptr_intptr_intptr_intptr + 244 26  allbx.ios                       0x00000001002598a8 mono_jit_runtime_invoke (mini-runtime.c:2524) 27  allbx.ios                       0x00000001002bbb84 do_runtime_invoke (object.c:2809) 28  allbx.ios                       0x00000001002bbae0 mono_runtime_invoke (object.c:2967) 29  allbx.ios                       0x000000010367c10c native_to_managed_trampoline_11(objc_object*, objc_selector*, _monomethod**, char const*, char const*) (registrar.m:481) 30  allbx.ios                       0x0000000103687e0c -[__monomac_nsasyncactiondispatcher xamarinapplyselector] (registrar.m:25787) 31  foundation                      0x0000000191abb65c __nsthreadperformperform + 340 32  corefoundation                  0x0000000190f80278 __cfrunloop_is_calling_out_to_a_source0_perform_function__ + 24 33  corefoundation                  0x0000000190f7fbc0 __cfrunloopdosources0 + 524 34  corefoundation                  0x0000000190f7d7c0 __cfrunlooprun + 804 35  corefoundation                  0x0000000190eac048 cfrunlooprunspecific + 444 36  graphicsservices                0x0000000192932198 gseventrunmodal + 180 37  uikit                           0x0000000196e982fc -[uiapplication _run] + 684 38  uikit                           0x0000000196e93034 uiapplicationmain + 208 39  allbx.ios                       0x0000000102624724 wrapper_managed_to_native_uikit_uiapplication_uiapplicationmain_int_string___intptr_intptr (/<unknown>:1) 40  allbx.ios                       0x0000000102022a1c uikit_uiapplication_main_string___intptr_intptr (uiapplication.cs:79) 41  allbx.ios                       0x00000001020228dc uikit_uiapplication_main_string___string_string (uiapplication.cs:63) 42  allbx.ios                       0x0000000100360630 allbx_ios_application_main_string__ (main.cs:18) 43  allbx.ios                       0x0000000100a2c5d4 wrapper_runtime_invoke_object_runtime_invoke_dynamic_intptr_intptr_intptr_intptr + 244 44  allbx.ios                       0x00000001002598a8 mono_jit_runtime_invoke (mini-runtime.c:2524) 45  allbx.ios                       0x00000001002bbb84 do_runtime_invoke (object.c:2809) 46  allbx.ios                       0x00000001002bdd04 mono_runtime_exec_main (object.c:4585) 47  allbx.ios                       0x00000001002bd920 mono_runtime_run_main (object.c:4134) 48  allbx.ios                       0x0000000100243b34 mono_jit_exec (driver.g.c:1048) 49  allbx.ios                       0x000000010035facc xamarin_main (monotouch-main.m:487) 50  allbx.ios                       0x000000010370e2dc main (main.arm64.m:209) 51  libdyld.dylib                   0x000000018fe905b8 start + 4  thread 1: 0   libsystem_kernel.dylib          0x000000018ffa1e1c __psynch_cvwait + 8 1   libsystem_pthread.dylib         0x00000001900679c0 _pthread_cond_wait + 640 2   libc++.1.dylib                  0x000000018f9913ec std::__1::condition_variable::wait(std::__1::unique_lock<std::__1::mutex>&) + 56 3   javascriptcore                  0x000000019575e548 void std::__1::condition_variable_any::wait<std::__1::unique_lock<bmalloc::mutex> >(std::__1::unique_lock<bmalloc::mutex>&) + 112 4   javascriptcore                  0x000000019575e4bc bmalloc::asynctask<bmalloc::heap, void (bmalloc::heap::*)()>::threadrunloop() + 168 5   javascriptcore                  0x000000019575e39c std::__1::__shared_ptr_emplace<std::__1::mutex, std::__1::allocator<std::__1::mutex> >::~__shared_ptr_emplace() + 0 6   javascriptcore                  0x000000019575e64c void* std::__1::__thread_proxy<std::__1::tuple<void (*)(bmalloc::asynctask<bmalloc::heap, void (bmalloc::heap::*)()>*), bmalloc::asynctask<bmalloc::heap, void (bmalloc::heap::*)()>*> >(void*) + 92 7   libsystem_pthread.dylib         0x0000000190068850 _pthread_body + 240 8   libsystem_pthread.dylib         0x0000000190068760 _pthread_body + 0 9   libsystem_pthread.dylib         0x0000000190065dac thread_start + 4  thread 2 name:  webthread thread 2: 0   libsystem_kernel.dylib          0x000000018ff8416c mach_msg_trap + 8 1   libsystem_kernel.dylib          0x000000018ff83fdc mach_msg + 72 2   corefoundation                  0x0000000190f7fcec __cfrunloopservicemachport + 192 3   corefoundation                  0x0000000190f7d908 __cfrunlooprun + 1132 4   corefoundation                  0x0000000190eac048 cfrunlooprunspecific + 444 5   webcore                         0x0000000195a5c45c runwebthread(void*) + 456 6   libsystem_pthread.dylib         0x0000000190068850 _pthread_body + 240 7   libsystem_pthread.dylib         0x0000000190068760 _pthread_body + 0 8   libsystem_pthread.dylib         0x0000000190065dac thread_start + 4  thread 3 name:  com.apple.nsurlconnectionloader thread 3: 0   libsystem_kernel.dylib          0x000000018ff8416c mach_msg_trap + 8 1   libsystem_kernel.dylib          0x000000018ff83fdc mach_msg + 72 2   corefoundation                  0x0000000190f7fcec __cfrunloopservicemachport + 192 3   corefoundation                  0x0000000190f7d908 __cfrunlooprun + 1132 4   corefoundation                  0x0000000190eac048 cfrunlooprunspecific + 444 5   cfnetwork                       0x000000019169dfd0 +[nsurlconnection(loader) _resourceloadloop:] + 336 6   foundation                      0x0000000191abb47c __nsthread__start__ + 1024 7   libsystem_pthread.dylib         0x0000000190068850 _pthread_body + 240 8   libsystem_pthread.dylib         0x0000000190068760 _pthread_body + 0 9   libsystem_pthread.dylib         0x0000000190065dac thread_start + 4  thread 4 name:  sgen worker thread 4: 0   libsystem_kernel.dylib          0x000000018ffa1e1c __psynch_cvwait + 8 1   libsystem_pthread.dylib         0x00000001900679c0 _pthread_cond_wait + 640 2   allbx.ios                       0x0000000100313acc thread_func (mono-os-mutex.h:108) 3   libsystem_pthread.dylib         0x0000000190068850 _pthread_body + 240 4   libsystem_pthread.dylib         0x0000000190068760 _pthread_body + 0 5   libsystem_pthread.dylib         0x0000000190065dac thread_start + 4  thread 5 name:  finalizer thread 5: 0   libsystem_kernel.dylib          0x000000018ff841a8 semaphore_wait_trap + 8 1   allbx.ios                       0x00000001002878fc finalizer_thread (mono-os-semaphore.h:73) 2   allbx.ios                       0x00000001002e8c30 start_wrapper (threads.c:740) 3   allbx.ios                       0x0000000100337998 inner_start_thread (mono-threads-posix.c:92) 4   libsystem_pthread.dylib         0x0000000190068850 _pthread_body + 240 5   libsystem_pthread.dylib         0x0000000190068760 _pthread_body + 0 6   libsystem_pthread.dylib         0x0000000190065dac thread_start + 4  thread 6 name:  com.apple.uikit.eventfetch-thread thread 6: 0   libsystem_kernel.dylib          0x000000018ff8416c mach_msg_trap + 8 1   libsystem_kernel.dylib          0x000000018ff83fdc mach_msg + 72 2   corefoundation                  0x0000000190f7fcec __cfrunloopservicemachport + 192 3   corefoundation                  0x0000000190f7d908 __cfrunlooprun + 1132 4   corefoundation                  0x0000000190eac048 cfrunlooprunspecific + 444 5   foundation                      0x00000001919bda8c -[nsrunloop(nsrunloop) runmode:beforedate:] + 304 6   foundation                      0x00000001919de57c -[nsrunloop(nsrunloop) rununtildate:] + 96 7   uikit                           0x000000019780da2c -[uieventfetcher threadmain] + 136 8   foundation                      0x0000000191abb47c __nsthread__start__ + 1024 9   libsystem_pthread.dylib         0x0000000190068850 _pthread_body + 240 10  libsystem_pthread.dylib         0x0000000190068760 _pthread_body + 0 11  libsystem_pthread.dylib         0x0000000190065dac thread_start + 4  thread 7 name:  timer-scheduler thread 7: 0   libsystem_kernel.dylib          0x000000018ffa1e1c __psynch_cvwait + 8 1   libsystem_pthread.dylib         0x00000001900679c0 _pthread_cond_wait + 640 2   allbx.ios                       0x000000010031999c mono_os_cond_timedwait (mono-os-mutex.h:108) 3   allbx.ios                       0x000000010031966c _wapi_handle_timedwait_signal_handle (handles.c:1555) 4   allbx.ios                       0x0000000100329358 wapi_waitforsingleobjectex (wait.c:189) 5   allbx.ios                       0x00000001002e4a34 mono_wait_uninterrupted (threads.c:1595) 6   allbx.ios                       0x00000001002e4cc4 ves_icall_system_threading_waithandle_waitone_internal (threads.c:1731) 7   allbx.ios                       0x00000001007c9cc8 wrapper_managed_to_native_system_threading_waithandle_waitone_internal_intptr_int + 104 8   allbx.ios                       0x00000001007c9c10 system_threading_waithandle_waitonenative_system_runtime_interopservices_safehandle_uint_bool_bool + 80 9   allbx.ios                       0x00000001007c8cac system_threading_waithandle_internalwaitone_system_runtime_interopservices_safehandle_long_bool_bool + 60 10  allbx.ios                       0x00000001007c8c5c system_threading_waithandle_waitone_long_bool + 44 11  allbx.ios                       0x00000001007c8a7c system_threading_waithandle_waitone_int_bool + 60 12  allbx.ios                       0x00000001007c8bdc system_threading_waithandle_waitone_int + 44 13  allbx.ios                       0x000000010090fe84 system_threading_timer_scheduler_schedulerthread + 1396 14  allbx.ios                       0x00000001007bea10 system_threading_threadhelper_threadstart_context_object + 192 15  allbx.ios                       0x00000001007bc17c system_threading_executioncontext_runinternal_system_threading_executioncontext_system_threading_contextcallback_object_bool + 428 16  allbx.ios                       0x00000001007bbfbc system_threading_executioncontext_run_system_threading_executioncontext_system_threading_contextcallback_object_bool + 44 17  allbx.ios                       0x00000001007bbf34 system_threading_executioncontext_run_system_threading_executioncontext_system_threading_contextcallback_object + 84 18  allbx.ios                       0x00000001007beb64 system_threading_threadhelper_threadstart + 52 19  allbx.ios                       0x0000000100a2c5d4 wrapper_runtime_invoke_object_runtime_invoke_dynamic_intptr_intptr_intptr_intptr + 244 20  allbx.ios                       0x00000001002598a8 mono_jit_runtime_invoke (mini-runtime.c:2524) 21  allbx.ios                       0x00000001002bbb84 do_runtime_invoke (object.c:2809) 22  allbx.ios                       0x00000001002e8cac start_wrapper (threads.c:747) 23  allbx.ios                       0x0000000100337998 inner_start_thread (mono-threads-posix.c:92) 24  libsystem_pthread.dylib         0x0000000190068850 _pthread_body + 240 25  libsystem_pthread.dylib         0x0000000190068760 _pthread_body + 0 26  libsystem_pthread.dylib         0x0000000190065dac thread_start + 4  thread 8 name:  rlmrealm notification listener thread 8: 0   libsystem_kernel.dylib          0x000000018ff88630 kevent + 8 1   allbx.ios                       0x0000000100066cdc realm::_impl::externalcommithelper::listen() + 212 2   allbx.ios                       0x0000000100066ed4 std::__1::__async_func<realm::_impl::externalcommithelper::externalcommithelper(realm::_impl::realmcoordinator&)::$_0>::operator()() + 28 3   allbx.ios                       0x0000000100066e5c std::__1::__async_assoc_state<void, std::__1::__async_func<realm::_impl::externalcommithelper::externalcommithelper(realm::_impl::realmcoordinator&)::$_0> >::__execute() + 28 4   allbx.ios                       0x0000000100067024 std::__1::__thread_proxy<std::__1::tuple<void (std::__1::__async_assoc_state<void, std::__1::__async_func<realm::_impl::externalcommithelper::externalcommithelper(realm::_impl::realmcoordinator&)::$_0> >::*)(), std::__1::__async_assoc_state<void, std::__1::__async_func<realm::_impl::externalcommithelper::externalcommithelper(realm::_impl::realmcoordinator&)::$_0> >*> >(void*, void*) + 84 5   libsystem_pthread.dylib         0x0000000190068850 _pthread_body + 240 6   libsystem_pthread.dylib         0x0000000190068760 _pthread_body + 0 7   libsystem_pthread.dylib         0x0000000190065dac thread_start + 4  thread 9 name:  tid_b207 thread 9: 0   libsystem_kernel.dylib          0x000000018ffa1e1c __psynch_cvwait + 8 1   libsystem_pthread.dylib         0x00000001900679c0 _pthread_cond_wait + 640 2   allbx.ios                       0x000000010031999c mono_os_cond_timedwait (mono-os-mutex.h:108) 3   allbx.ios                       0x000000010031966c _wapi_handle_timedwait_signal_handle (handles.c:1555) 4   allbx.ios                       0x0000000100329358 wapi_waitforsingleobjectex (wait.c:189) 5   allbx.ios                       0x00000001002b364c ves_icall_system_threading_monitor_monitor_wait (monitor.c:1288) 6   allbx.ios                       0x00000001007bdc68 wrapper_managed_to_native_system_threading_monitor_monitor_wait_object_int + 104 7   allbx.ios                       0x00000001007bdd14 system_threading_monitor_objwait_bool_int_object + 84 8   allbx.ios                       0x00000001007bd78c system_threading_monitor_wait_object_int_bool + 44 9   allbx.ios                       0x00000001007bd820 system_threading_monitor_wait_object_int + 32 10  allbx.ios                       0x000000010078e648 system_threading_semaphoreslim_waituntilcountortimeout_int_uint_system_threading_cancellationtoken + 120 11  allbx.ios                       0x000000010078e3ec system_threading_semaphoreslim_wait_int_system_threading_cancellationtoken + 412 12  allbx.ios                       0x0000000100f380a4 system_collections_concurrent_blockingcollection_1_t_ref_trytakewithnotimevalidation_t_ref__int_system_threading_cancellationtoken_system_threading_cancellationtokensource (blockingcollection.cs:712) 13  allbx.ios                       0x0000000100f37f58 system_collections_concurrent_blockingcollection_1_t_ref_trytake_t_ref__int_system_threading_cancellationtoken (blockingcollection.cs:667) 14  allbx.ios                       0x0000000100f37cec system_collections_concurrent_blockingcollection_1_t_ref_take (blockingcollection.cs:554) 15  allbx.ios                       0x0000000101b51fe4 xamarin_forms_platform_ios_cadisplaylinkticker_startthread (/c:\buildagent2\work\ca3766cfc22354a1\xamarin.forms.platform.ios\cadisplaylinkticker.cs:52) 16  allbx.ios                       0x00000001007bea10 system_threading_threadhelper_threadstart_context_object + 192 17  allbx.ios                       0x00000001007bc17c system_threading_executioncontext_runinternal_system_threading_executioncontext_system_threading_contextcallback_object_bool + 428 18  allbx.ios                       0x00000001007bbfbc system_threading_executioncontext_run_system_threading_executioncontext_system_threading_contextcallback_object_bool + 44 19  allbx.ios                       0x00000001007bbf34 system_threading_executioncontext_run_system_threading_executioncontext_system_threading_contextcallback_object + 84 20  allbx.ios                       0x00000001007beb64 system_threading_threadhelper_threadstart + 52 21  allbx.ios                       0x0000000100a2c5d4 wrapper_runtime_invoke_object_runtime_invoke_dynamic_intptr_intptr_intptr_intptr + 244 22  allbx.ios                       0x00000001002598a8 mono_jit_runtime_invoke (mini-runtime.c:2524) 23  allbx.ios                       0x00000001002bbb84 do_runtime_invoke (object.c:2809) 24  allbx.ios                       0x00000001002e8cac start_wrapper (threads.c:747) 25  allbx.ios                       0x0000000100337998 inner_start_thread (mono-threads-posix.c:92) 26  libsystem_pthread.dylib         0x0000000190068850 _pthread_body + 240 27  libsystem_pthread.dylib         0x0000000190068760 _pthread_body + 0 28  libsystem_pthread.dylib         0x0000000190065dac thread_start + 4  thread 10 name:  avaudiosession notify thread thread 10: 0   libsystem_kernel.dylib          0x000000018ff8416c mach_msg_trap + 8 1   libsystem_kernel.dylib          0x000000018ff83fdc mach_msg + 72 2   corefoundation                  0x0000000190f7fcec __cfrunloopservicemachport + 192 3   corefoundation                  0x0000000190f7d908 __cfrunlooprun + 1132 4   corefoundation                  0x0000000190eac048 cfrunlooprunspecific + 444 5   avfaudio                        0x00000001aa6a5fe8 genericrunloopthread::entry(void*) + 164 6   avfaudio                        0x00000001aa6cbf14 capthread::entry(capthread*) + 84 7   libsystem_pthread.dylib         0x0000000190068850 _pthread_body + 240 8   libsystem_pthread.dylib         0x0000000190068760 _pthread_body + 0 9   libsystem_pthread.dylib         0x0000000190065dac thread_start + 4  thread 11 name:  threadpool worker thread 11: 0   libsystem_kernel.dylib          0x000000018ffa1e1c __psynch_cvwait + 8 1   libsystem_pthread.dylib         0x00000001900679c0 _pthread_cond_wait + 640 2   allbx.ios                       0x00000001002e22e0 worker_thread (mono-os-mutex.h:136) 3   allbx.ios                       0x00000001002e8c30 start_wrapper (threads.c:740) 4   allbx.ios                       0x0000000100337998 inner_start_thread (mono-threads-posix.c:92) 5   libsystem_pthread.dylib         0x0000000190068850 _pthread_body + 240 6   libsystem_pthread.dylib         0x0000000190068760 _pthread_body + 0 7   libsystem_pthread.dylib         0x0000000190065dac thread_start + 4  thread 12 name:  threadpool worker thread 12: 0   libsystem_kernel.dylib          0x000000018ffa1e1c __psynch_cvwait + 8 1   libsystem_pthread.dylib         0x00000001900679c0 _pthread_cond_wait + 640 2   allbx.ios                       0x00000001002e22e0 worker_thread (mono-os-mutex.h:136) 3   allbx.ios                       0x00000001002e8c30 start_wrapper (threads.c:740) 4   allbx.ios                       0x0000000100337998 inner_start_thread (mono-threads-posix.c:92) 5   libsystem_pthread.dylib         0x0000000190068850 _pthread_body + 240 6   libsystem_pthread.dylib         0x0000000190068760 _pthread_body + 0 7   libsystem_pthread.dylib         0x0000000190065dac thread_start + 4  thread 13 name:  tid_1557 thread 13: 0   libsystem_pthread.dylib         0x0000000190065da0 start_wqthread + 0  thread 14 name:  tid_b017 thread 14: 0   libsystem_kernel.dylib          0x000000018ffa1e1c __psynch_cvwait + 8 1   libsystem_pthread.dylib         0x00000001900679c0 _pthread_cond_wait + 640 2   allbx.ios                       0x000000010033b6c4 mono_thread_info_sleep (mono-os-mutex.h:137) 3   allbx.ios                       0x00000001002e18b8 monitor_thread (threadpool-ms.c:905) 4   allbx.ios                       0x00000001002e8c30 start_wrapper (threads.c:740) 5   allbx.ios                       0x0000000100337998 inner_start_thread (mono-threads-posix.c:92) 6   libsystem_pthread.dylib         0x0000000190068850 _pthread_body + 240 7   libsystem_pthread.dylib         0x0000000190068760 _pthread_body + 0 8   libsystem_pthread.dylib         0x0000000190065dac thread_start + 4  thread 15: 0   libsystem_pthread.dylib         0x0000000190065da0 start_wqthread + 0  thread 0 crashed arm thread state (64-bit):     x0: 0x0000000000000000   x1: 0x0000000000000000   x2: 0x0000000000000000   x3: 0x0000000000000036     x4: 0x000000000000001b   x5: 0x000000016fdaeae0   x6: 0x0000000000000031   x7: 0xffffffffffffffec     x8: 0x0000000008000000   x9: 0x0000000004000000  x10: 0x0000000190064314  x11: 0x000000010aa10000    x12: 0xffffffffffffc000  x13: 0x000000010aa0c000  x14: 0x0000000004000020  x15: 0x0000000000005848    x16: 0x0000000000000148  x17: 0x0000000190ecb5a0  x18: 0x0000000000000000  x19: 0x0000000000000006    x20: 0x00000001b605bc40  x21: 0x000000010373bd2b  x22: 0x000000010373bd88  x23: 0x5bbf5b5ad2a000e0    x24: 0x000000016fdaef18  x25: 0x000000010373bd3b  x26: 0x00000001190f5b88  x27: 0x000000010ae48bb0    x28: 0x000000010a80a1f0   fp: 0x000000016fdaeeb0   lr: 0x000000019006a450     sp: 0x000000016fdaee90   pc: 0x000000018ffa2014 cpsr: 0x00000000  binary images: 0x10004c000 - 0x1038ebfff allbx.ios arm64  <b735db1d924c31c9a66b0c776b678102> /var/containers/bundle/application/-------30b1-4f7a-a5ec------/allbx.ios.app/allbx.ios 0x109ef4000 - 0x109f23fff dyld arm64  <f5a894bbb0cc38b1930add2172007394> /usr/lib/dyld 0x109f78000 - 0x10a3c3fff libskiasharp arm64  <2f0e83ff66c0338dbaf79398b01e0785> /var/containers/bundle/application/5c69d829-30b1-4f7a-a5ec-171c2108dfbf/allbx.ios.app/frameworks/libskiasharp.framework/libskiasharp 0x11572c000 - 0x11572ffff pegasus arm64  <8fc9362449b436b883c359d5e8555bed> /system/library/accessibilitybundles/pegasus.axbundle/pegasus 0x115738000 - 0x115743fff contactsui arm64  <73928fb30eeb311e8a95437f2f77eb79> /system/library/accessibilitybundles/contactsui.axbundle/contactsui 0x115754000 - 0x115757fff weatherfoundation arm64  <9486354cd3183e909c56294e3a916751> /system/library/accessibilitybundles/weatherfoundation.axbundle/weatherfoundation 0x115760000 - 0x115763fff twitterframework arm64  <02a4564942c431d79660de033212188d> /system/library/accessibilitybundles/twitterframework.axbundle/twitterframework 0x11576c000 - 0x11576ffff pdfkit arm64  <6fd632a57f30377781b27a89df818078> /system/library/accessibilitybundles/pdfkit.axbundle/pdfkit 0x115778000 - 0x11577bfff gamecenteruiframework arm64  <364baf5f62c03f608ad3020b238b79ba> /system/library/accessibilitybundles/gamecenteruiframework.axbundle/gamecenteruiframework 0x115784000 - 0x115797fff eventkituiframework arm64  <89ef1b5f49393345ad29e3ababf44e90> /system/library/accessibilitybundles/eventkituiframework.axbundle/eventkituiframework 0x1157c0000 - 0x1157c7fff safariservices arm64  <ed8550f474f137a4bd07511b22f1d2ac> /system/library/accessibilitybundles/safariservices.axbundle/safariservices 0x1157d4000 - 0x1157d7fff springboardfoundation arm64  <ac308c6ce60139c9b5dc4ddcfe385908> /system/library/accessibilitybundles/springboardfoundation.axbundle/springboardfoundation 0x1157e0000 - 0x115813fff vectorkit arm64  <a4c9b38fa5093ed49f3ba12ce3d65957> /system/library/accessibilitybundles/vectorkit.axbundle/vectorkit 0x115838000 - 0x11583bfff spritekit arm64  <09294776a0d9379fb6358195d37ce42e> /system/library/accessibilitybundles/spritekit.axbundle/spritekit 0x115844000 - 0x11584ffff preferencesframework arm64  <91680771b1f53afe8791b8d2052443ef> /system/library/accessibilitybundles/preferencesframework.axbundle/preferencesframework 0x115860000 - 0x115863fff coresuggestionsui arm64   

...

i suggest looking mr. l's comment root cause of issue in order better understand crash logs ios, must symbolicate them using files within ipa file (which 1 sent apple when pushing out update app app store).

xamarin's info here, check out 2 links @ bottom of page.


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