我目前有一个调用 web 服务并将数据存储在核心数据中的应用程序，但是当我完全终止应用程序时，即即使在后台，当我调用 web 服务时它崩溃，可能是什么问题？这是设备的崩溃日志，有人可以帮我吗？
Thread 0 name: Dispatch queue: com.apple.main-thread
Thread 0:
0 libsystem_kernel.dylib 0x3bb90f04 semaphore_wait_trap + 8
1 libdispatch.dylib 0x3babc540 _dispatch_thread_semaphore_wait$VARIANT$up + 8
2 libdispatch.dylib 0x3bac87a0 _dispatch_barrier_sync_f_slow + 92
3 Eventz 0x000f0a0c 0x82000 + 453132
4 Eventz 0x000f3bac 0x82000 + 465836
5 Eventz 0x000f3d14 0x82000 + 466196
6 libdispatch.dylib 0x3baba4b4 _dispatch_client_callout + 20
7 libdispatch.dylib 0x3babb836 dispatch_once_f$VARIANT$up + 34
8 Eventz 0x000f3ce2 0x82000 + 466146
9 Eventz 0x000eff4c 0x82000 + 450380
10 Eventz 0x000ecbae 0x82000 + 437166
11 Eventz 0x000a37b4 0x82000 + 137140
12 Eventz 0x00085492 0x82000 + 13458
13 Eventz 0x00084f66 0x82000 + 12134
14 Eventz 0x000ef5bc 0x82000 + 447932
15 Eventz 0x000ee694 0x82000 + 444052
16 Eventz 0x000ecc0a 0x82000 + 437258
17 Eventz 0x000eccfc 0x82000 + 437500
18 Eventz 0x00084b9a 0x82000 + 11162
19 UIKit 0x359fdb2e -[UIApplication _applicationOpenURL:payload:] + 270
20 UIKit 0x359d687c -[UIApplication _callApplicationResumeHandlersForURL:payload:] + 100
21 UIKit 0x359d5f66 -[UIApplication _handleApplicationResumeEvent:] + 1222
22 UIKit 0x3582dd54 -[UIApplication handleEvent:withNewEvent:] + 1288
23 UIKit 0x3582d6c8 -[UIApplication sendEvent:] + 68
24 UIKit 0x3582d116 _UIApplicationHandleEvent + 6150
25 GraphicsServices 0x3751f5a0 _PurpleEventCallback + 588
26 CoreFoundation 0x339fa680 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 12
27 CoreFoundation 0x339f9ee4 __CFRunLoopDoSources0 + 208
28 CoreFoundation 0x339f8cb2 __CFRunLoopRun + 642
29 CoreFoundation 0x3396beb8 CFRunLoopRunSpecific + 352
30 CoreFoundation 0x3396bd44 CFRunLoopRunInMode + 100
31 GraphicsServices 0x3751e2e6 GSEventRunModal + 70
32 UIKit 0x358812fc UIApplicationMain + 1116
33 Eventz 0x00083d78 0x82000 + 7544
34 libdyld.dylib 0x3badab1c start + 0
Thread 1 name: Dispatch queue: com.apple.libdispatch-manager
Thread 1:
0 libsystem_kernel.dylib 0x3bb91648 kevent64 + 24
1 libdispatch.dylib 0x3baca4ec _dispatch_mgr_invoke + 792
2 libdispatch.dylib 0x3babcdf4 _dispatch_mgr_thread$VARIANT$up + 32
Thread 2 name: Dispatch queue: com.apple.root.default-priority
Thread 2:
0 libsystem_kernel.dylib 0x3bb90f04 semaphore_wait_trap + 8
1 libdispatch.dylib 0x3babc540 _dispatch_thread_semaphore_wait$VARIANT$up + 8
2 libdispatch.dylib 0x3bac87a0 _dispatch_barrier_sync_f_slow + 92
3 Eventz 0x00089a26 0x82000 + 31270
4 libdispatch.dylib 0x3babb11c _dispatch_call_block_and_release + 8
5 libdispatch.dylib 0x3bac9254 _dispatch_root_queue_drain + 256
6 libdispatch.dylib 0x3bac93b4 _dispatch_worker_thread2 + 80
7 libsystem_c.dylib 0x3baefa0e _pthread_wqthread + 358
8 libsystem_c.dylib 0x3baef8a0 start_wqthread + 4
Thread 3 name: WebThread
Thread 3:
0 libsystem_kernel.dylib 0x3bb90eb4 mach_msg_trap + 20
1 libsystem_kernel.dylib 0x3bb91048 mach_msg + 36
2 CoreFoundation 0x339fa040 __CFRunLoopServiceMachPort + 124
3 CoreFoundation 0x339f8d9e __CFRunLoopRun + 878
4 CoreFoundation 0x3396beb8 CFRunLoopRunSpecific + 352
5 CoreFoundation 0x3396bd44 CFRunLoopRunInMode + 100
6 WebCore 0x39959500 RunWebThread(void*) + 440
7 libsystem_c.dylib 0x3bafa30e _pthread_start + 306
8 libsystem_c.dylib 0x3bafa1d4 thread_start + 4
Thread 4 name: com.apple.NSURLConnectionLoader
Thread 4:
0 libsystem_kernel.dylib 0x3bb90eb4 mach_msg_trap + 20
1 libsystem_kernel.dylib 0x3bb91048 mach_msg + 36
2 CoreFoundation 0x339fa040 __CFRunLoopServiceMachPort + 124
3 CoreFoundation 0x339f8d9e __CFRunLoopRun + 878
4 CoreFoundation 0x3396beb8 CFRunLoopRunSpecific + 352
5 CoreFoundation 0x3396bd44 CFRunLoopRunInMode + 100
6 Foundation 0x342b83d0 +[NSURLConnection(Loader) _resourceLoadLoop:] + 304
7 Foundation 0x3433be80 __NSThread__main__ + 968
8 libsystem_c.dylib 0x3bafa30e _pthread_start + 306
9 libsystem_c.dylib 0x3bafa1d4 thread_start + 4
Thread 5 name: Dispatch queue: com.apple.root.default-priority
Thread 5:
0 libsystem_kernel.dylib 0x3bb90f04 semaphore_wait_trap + 8
1 libdispatch.dylib 0x3babc540 _dispatch_thread_semaphore_wait$VARIANT$up + 8
2 libdispatch.dylib 0x3bac87a0 _dispatch_barrier_sync_f_slow + 92
3 Eventz 0x000890ee 0x82000 + 28910
4 libdispatch.dylib 0x3babb11c _dispatch_call_block_and_release + 8
5 libdispatch.dylib 0x3bac9254 _dispatch_root_queue_drain + 256
6 libdispatch.dylib 0x3bac93b4 _dispatch_worker_thread2 + 80
7 libsystem_c.dylib 0x3baefa0e _pthread_wqthread + 358
8 libsystem_c.dylib 0x3baef8a0 start_wqthread + 4
Thread 6 name: Dispatch queue: com.apple.root.default-priority
Thread 6:
0 libsystem_kernel.dylib 0x3bb90f04 semaphore_wait_trap + 8
1 libdispatch.dylib 0x3babc540 _dispatch_thread_semaphore_wait$VARIANT$up + 8
2 libdispatch.dylib 0x3bac87a0 _dispatch_barrier_sync_f_slow + 92
3 Eventz 0x00089a26 0x82000 + 31270
4 libdispatch.dylib 0x3babb11c _dispatch_call_block_and_release + 8
5 libdispatch.dylib 0x3bac9254 _dispatch_root_queue_drain + 256
6 libdispatch.dylib 0x3bac93b4 _dispatch_worker_thread2 + 80
7 libsystem_c.dylib 0x3baefa0e _pthread_wqthread + 358
8 libsystem_c.dylib 0x3baef8a0 start_wqthread + 4
Thread 7 name: Dispatch queue: com.apple.root.default-priority
Thread 7:
0 libsystem_kernel.dylib 0x3bba10fc __psynch_mutexwait + 24
1 libsystem_c.dylib 0x3baea124 pthread_mutex_lock + 388
2 libicucore.A.dylib 0x3b222544 umtx_lock + 60
3 libicucore.A.dylib 0x3b283b74 0x3b221000 + 404340
4 libicucore.A.dylib 0x3b28426c 0x3b221000 + 406124
5 libicucore.A.dylib 0x3b222f0c ures_getByKeyWithFallback + 412
6 libicucore.A.dylib 0x3b2c3b72 0x3b221000 + 666482
7 libicucore.A.dylib 0x3b29e2b6 icu::Calendar::setWeekData(icu::Locale const&, char const*, UErrorCode&) + 294
8 libicucore.A.dylib 0x3b22b8ca icu::Calendar::Calendar(icu::TimeZone*, icu::Locale const&, UErrorCode&) + 106
9 libicucore.A.dylib 0x3b22b7f6 icu::GregorianCalendar::GregorianCalendar(icu::Locale const&, UErrorCode&) + 22
10 libicucore.A.dylib 0x3b22b7d6 icu::GregorianCalendar::GregorianCalendar(icu::Locale const&, UErrorCode&) + 6
11 libicucore.A.dylib 0x3b22af20 icu::Calendar::createInstance(icu::TimeZone*, icu::Locale const&, UErrorCode&) + 424
12 libicucore.A.dylib 0x3b229a02 icu::SimpleDateFormat::initializeCalendar(icu::TimeZone*, icu::Locale const&, UErrorCode&) + 30
13 libicucore.A.dylib 0x3b22d416 icu::SimpleDateFormat::SimpleDateFormat(icu::Locale const&, UErrorCode&) + 122
14 libicucore.A.dylib 0x3b22d392 icu::SimpleDateFormat::SimpleDateFormat(icu::Locale const&, UErrorCode&) + 6
15 libicucore.A.dylib 0x3b229594 icu::DateFormat::create(icu::DateFormat::EStyle, icu::DateFormat::EStyle, icu::Locale const&) + 156
16 libicucore.A.dylib 0x3b229418 udat_open + 136
17 CoreFoundation 0x339e878e __ResetUDateFormat + 342
18 CoreFoundation 0x339ad988 CFDateFormatterCreate + 176
19 Foundation 0x342b5072 -[NSDateFormatter _regenerateFormatter] + 254
20 Foundation 0x342b4f08 -[NSDateFormatter stringForObjectValue:] + 108
21 Eventz 0x000ca292 0x82000 + 295570
22 Eventz 0x00089d16 0x82000 + 32022
23 Eventz 0x000890a6 0x82000 + 28838
24 libdispatch.dylib 0x3babb11c _dispatch_call_block_and_release + 8
25 libdispatch.dylib 0x3bac9254 _dispatch_root_queue_drain + 256
26 libdispatch.dylib 0x3bac93b4 _dispatch_worker_thread2 + 80
27 libsystem_c.dylib 0x3baefa0e _pthread_wqthread + 358
28 libsystem_c.dylib 0x3baef8a0 start_wqthread + 4
Thread 8 name: Dispatch queue: com.apple.root.default-priority
Thread 8:
0 libsystem_kernel.dylib 0x3bba10fc __psynch_mutexwait + 24
1 libsystem_c.dylib 0x3baea124 pthread_mutex_lock + 388
2 libicucore.A.dylib 0x3b222544 umtx_lock + 60
3 libicucore.A.dylib 0x3b284b44 0x3b221000 + 408388
4 libicucore.A.dylib 0x3b2839e4 0x3b221000 + 403940
5 libicucore.A.dylib 0x3b2cfd56 icu::NumberingSystem::createInstanceByName(char const*, UErrorCode&) + 162
6 libicucore.A.dylib 0x3b2cfb94 icu::NumberingSystem::createInstance(icu::Locale const&, UErrorCode&) + 152
7 libicucore.A.dylib 0x3b224ed8 icu::DecimalFormat::construct(UErrorCode&, UParseError&, icu::UnicodeString const*, icu::DecimalFormatSymbols*) + 160
8 libicucore.A.dylib 0x3b2af35c icu::DecimalFormat::DecimalFormat(icu::UnicodeString const&, icu::DecimalFormatSymbols*, UNumberFormatStyle, UErrorCode&) + 180
9 libicucore.A.dylib 0x3b2af29e icu::DecimalFormat::DecimalFormat(icu::UnicodeString const&, icu::DecimalFormatSymbols*, UNumberFormatStyle, UErrorCode&) + 18
10 libicucore.A.dylib 0x3b2cf7e6 icu::NumberFormat::makeInstance(icu::Locale const&, UNumberFormatStyle, UErrorCode&) + 1554
11 libicucore.A.dylib 0x3b22ce74 icu::SimpleDateFormat::initialize(icu::Locale const&, UErrorCode&) + 20
12 libicucore.A.dylib 0x3b22d470 icu::SimpleDateFormat::SimpleDateFormat(icu::Locale const&, UErrorCode&) + 212
13 libicucore.A.dylib 0x3b22d392 icu::SimpleDateFormat::SimpleDateFormat(icu::Locale const&, UErrorCode&) + 6
14 libicucore.A.dylib 0x3b229594 icu::DateFormat::create(icu::DateFormat::EStyle, icu::DateFormat::EStyle, icu::Locale const&) + 156
15 libicucore.A.dylib 0x3b229418 udat_open + 136
16 CoreFoundation 0x339e878e __ResetUDateFormat + 342
17 CoreFoundation 0x339ad988 CFDateFormatterCreate + 176
18 Foundation 0x342b5072 -[NSDateFormatter _regenerateFormatter] + 254
19 Foundation 0x342b4f08 -[NSDateFormatter stringForObjectValue:] + 108
20 Eventz 0x000ca292 0x82000 + 295570
21 Eventz 0x00089d16 0x82000 + 32022
22 Eventz 0x000890a6 0x82000 + 28838
23 libdispatch.dylib 0x3babb11c _dispatch_call_block_and_release + 8
24 libdispatch.dylib 0x3bac9254 _dispatch_root_queue_drain + 256
25 libdispatch.dylib 0x3bac93b4 _dispatch_worker_thread2 + 80
26 libsystem_c.dylib 0x3baefa0e _pthread_wqthread + 358
27 libsystem_c.dylib 0x3baef8a0 start_wqthread + 4
Unknown thread crashed with unknown flavor: 5, state_count: 1