我的iOS应用程序崩溃了。在崩溃日志中，我发现了以下信息：
Exception Type: EXC_CRASH (SIGABRT)
Exception Codes: 0x0000000000000000, 0x0000000000000000
Triggered by Thread: 9
Thread 9 Crashed:
0 libsystem_kernel.dylib 0x39189c70 __workq_kernreturn + 8
1 libsystem_pthread.dylib 0x391eec1f _pthread_wqthread + 307
2 libsystem_pthread.dylib 0x391eead8 start_wqthread + 4
我不知道如何解释这个。在其他线程中发生了一些其他操作，但它们看起来没问题。知道为什么没有做任何事情的线程崩溃了吗？
完整崩溃报告：
Incident Identifier: 10D06EC1-B25F-47C3-99B8-6940748ACB87
CrashReporter Key: 5b7280661b8ec1e78028ed23448f54ab51a78b2c
Hardware Model: iPad4,5
Process: MyApp [4949]
Path: /var/mobile/Applications/584B97BE-1555-4B03-A00D-9A563AA71E48/MyApp.app/MyApp
Identifier: com.me.myapp
Version: 2.0.0.1 (2.0.0.1)
Code Type: ARM (Native)
Parent Process: launchd [1]
Date/Time: 2014-08-07 10:58:24.111 +0200
OS Version: iOS 7.1.2 (11D257)
Report Version: 104
Exception Type: EXC_CRASH (SIGABRT)
Exception Codes: 0x0000000000000000, 0x0000000000000000
Triggered by Thread: 9
Thread 0:
0 libsystem_kernel.dylib 0x39176a50 mach_msg_trap + 20
1 libsystem_kernel.dylib 0x39176849 mach_msg + 37
2 CoreFoundation 0x2dfc55e5 __CFRunLoopServiceMachPort + 153
3 CoreFoundation 0x2dfc3d4b __CFRunLoopRun + 859
4 CoreFoundation 0x2df2e725 CFRunLoopRunSpecific + 521
5 CoreFoundation 0x2df2e507 CFRunLoopRunInMode + 103
6 GraphicsServices 0x32e676cf GSEventRunModal + 135
7 UIKit 0x3088f86d UIApplicationMain + 1133
8 Myapp 0x00186623 main (main.m:20)
9 libdyld.dylib 0x390d2ab5 start + 1
Thread 1:
0 libsystem_kernel.dylib 0x39176804 kevent64 + 24
1 libdispatch.dylib 0x390c5051 _dispatch_mgr_invoke + 229
2 libdispatch.dylib 0x390bf2df _dispatch_mgr_thread + 35
Thread 2 name: com.apple.NSURLConnectionLoader
Thread 2:
0 libsystem_kernel.dylib 0x39176a50 mach_msg_trap + 20
1 libsystem_kernel.dylib 0x39176849 mach_msg + 37
2 CoreFoundation 0x2dfc55e5 __CFRunLoopServiceMachPort + 153
3 CoreFoundation 0x2dfc3d05 __CFRunLoopRun + 789
4 CoreFoundation 0x2df2e725 CFRunLoopRunSpecific + 521
5 CoreFoundation 0x2df2e507 CFRunLoopRunInMode + 103
6 Foundation 0x2e96f23d +[NSURLConnection(Loader) _resourceLoadLoop:] + 317
7 Foundation 0x2e9e4a0b __NSThread__main__ + 1059
8 libsystem_pthread.dylib 0x391f0957 _pthread_body + 139
9 libsystem_pthread.dylib 0x391f08c7 _pthread_start + 99
10 libsystem_pthread.dylib 0x391eeae4 thread_start + 4
Thread 3 name: com.apple.CFSocket.private
Thread 3:
0 libsystem_kernel.dylib 0x39189434 __select + 20
1 CoreFoundation 0x2dfc94df __CFSocketManager + 483
2 libsystem_pthread.dylib 0x391f0957 _pthread_body + 139
3 libsystem_pthread.dylib 0x391f08c7 _pthread_start + 99
4 libsystem_pthread.dylib 0x391eeae4 thread_start + 4
Thread 4 name: WebThread
Thread 4:
0 libsystem_kernel.dylib 0x39176a50 mach_msg_trap + 20
1 libsystem_kernel.dylib 0x39176849 mach_msg + 37
2 CoreFoundation 0x2dfc55e5 __CFRunLoopServiceMachPort + 153
3 CoreFoundation 0x2dfc3d05 __CFRunLoopRun + 789
4 CoreFoundation 0x2df2e725 CFRunLoopRunSpecific + 521
5 CoreFoundation 0x2df2e507 CFRunLoopRunInMode + 103
6 WebCore 0x364ccc71 RunWebThread(void*) + 417
7 libsystem_pthread.dylib 0x391f0957 _pthread_body + 139
8 libsystem_pthread.dylib 0x391f08c7 _pthread_start + 99
9 libsystem_pthread.dylib 0x391eeae4 thread_start + 4
Thread 5 name: JavaScriptCore::BlockFree
Thread 5:
0 libsystem_kernel.dylib 0x39188f2c __psynch_cvwait + 24
1 libsystem_pthread.dylib 0x391eff63 _pthread_cond_wait + 519
2 libsystem_pthread.dylib 0x391f0d9d pthread_cond_wait + 37
3 JavaScriptCore 0x2ef5d309 JSC::BlockAllocator::blockFreeingThreadMain() + 205
4 JavaScriptCore 0x2ef5a971 WTF::wtfThreadEntryPoint(void*) + 13
5 libsystem_pthread.dylib 0x391f0957 _pthread_body + 139
6 libsystem_pthread.dylib 0x391f08c7 _pthread_start + 99
7 libsystem_pthread.dylib 0x391eeae4 thread_start + 4
Thread 6 name: JavaScriptCore::Marking
Thread 6:
0 libsystem_kernel.dylib 0x39188f2c __psynch_cvwait + 24
1 libsystem_pthread.dylib 0x391eff63 _pthread_cond_wait + 519
2 libsystem_pthread.dylib 0x391f0d9d pthread_cond_wait + 37
3 JavaScriptCore 0x2f0fbcb3 JSC::GCThread::waitForNextPhase() + 75
4 JavaScriptCore 0x2f0fbd0d JSC::GCThread::gcThreadMain() + 49
5 JavaScriptCore 0x2ef5a971 WTF::wtfThreadEntryPoint(void*) + 13
6 libsystem_pthread.dylib 0x391f0957 _pthread_body + 139
7 libsystem_pthread.dylib 0x391f08c7 _pthread_start + 99
8 libsystem_pthread.dylib 0x391eeae4 thread_start + 4
Thread 7:
0 libsystem_kernel.dylib 0x39176a50 mach_msg_trap + 20
1 libsystem_kernel.dylib 0x39176849 mach_msg + 37
2 CoreFoundation 0x2dfc55e5 __CFRunLoopServiceMachPort + 153
3 CoreFoundation 0x2dfc3d05 __CFRunLoopRun + 789
4 CoreFoundation 0x2df2e725 CFRunLoopRunSpecific + 521
5 CoreFoundation 0x2df72347 CFRunLoopRun + 95
6 CoreMotion 0x2e5ed4fd ___lldb_unnamed_function1426$$CoreMotion + 725
7 libsystem_pthread.dylib 0x391f0957 _pthread_body + 139
8 libsystem_pthread.dylib 0x391f08c7 _pthread_start + 99
9 libsystem_pthread.dylib 0x391eeae4 thread_start + 4
Thread 8:
0 libsystem_kernel.dylib 0x39188744 __lseek + 8
1 Foundation 0x2e9aa02f -[NSConcreteFileHandle readDataOfLength:] + 119
2 MyApp 0x001549b1 -[MyClass myMethod:] (MyClass.m:425)
3 MyApp 0x001540d9 -[MyClass myMethod:] (MyClass.m:425)
4 MyApp 0x004b58d9 -[MyClass myMethod:] (MyClass.m:425)
5 MyApp 0x004b6bff -[MyClass myMethod:] (MyClass.m:425)
6 MyApp 0x004b88e1 -[MyClass myMethod:] (MyClass.m:425)
7 MyApp 0x004b0203 -[MyClass myMethod:] (MyClass.m:425)
8 CoreFoundation 0x2dffe410 __invoking___ + 64
9 CoreFoundation 0x2df48963 -[NSInvocation invoke] + 283
10 Foundation 0x2e9d1d05 -[NSInvocationOperation main] + 109
11 Foundation 0x2e92f871 -[__NSOperationInternal _start:] + 769
12 Foundation 0x2e9d3741 __NSOQSchedule_f + 57
13 libdispatch.dylib 0x390c2cb9 _dispatch_queue_drain + 485
14 libdispatch.dylib 0x390bfc6b _dispatch_queue_invoke + 39
15 libdispatch.dylib 0x390c35ef _dispatch_root_queue_drain + 75
16 libdispatch.dylib 0x390c38d9 _dispatch_worker_thread2 + 53
17 libsystem_pthread.dylib 0x391eec15 _pthread_wqthread + 297
18 libsystem_pthread.dylib 0x391eead8 start_wqthread + 4
Thread 9 Crashed:
0 libsystem_kernel.dylib 0x39189c70 __workq_kernreturn + 8
1 libsystem_pthread.dylib 0x391eec1f _pthread_wqthread + 307
2 libsystem_pthread.dylib 0x391eead8 start_wqthread + 4
Thread 10:
0 libsystem_c.dylib 0x3911ff65 usleep$NOCANCEL + 1
1 libsystem_c.dylib 0x39139ffd abort + 81
2 libsystem_malloc.dylib 0x391b772d szone_error + 313
3 libsystem_malloc.dylib 0x391b79ef free_tiny_botch + 63
4 CoreFoundation 0x2e012bb4 __CFBasicHashRehash + 2884
5 CoreFoundation 0x2e01362c __CFBasicHashAddValue + 96
6 CoreFoundation 0x2df2d850 CFBasicHashAddValue + 3320
7 CoreData 0x2dd6d861 _PFFastMOCObjectWillChange + 217
8 CoreData 0x2dd6d66f _PF_ManagedObject_WillChangeValueForKeyIndex + 211
9 CoreData 0x2dd6d4ff _sharedIMPL_setvfk_core + 107
10 MyApp 0x0019dcaf -[MyClass myMethod:] (MyClass.m:425)
11 MyApp 0x0019ec49 -[MyClass myMethod:] (MyClass.m:425)
12 CoreFoundation 0x2dffe410 __invoking___ + 64
13 CoreFoundation 0x2df48963 -[NSInvocation invoke] + 283
14 Foundation 0x2e9d1d05 -[NSInvocationOperation main] + 109
15 Foundation 0x2e92f871 -[__NSOperationInternal _start:] + 769
16 Foundation 0x2e9d3741 __NSOQSchedule_f + 57
17 libdispatch.dylib 0x390c2cb9 _dispatch_queue_drain + 485
18 libdispatch.dylib 0x390bfc6b _dispatch_queue_invoke + 39
19 libdispatch.dylib 0x390c35ef _dispatch_root_queue_drain + 75
20 libdispatch.dylib 0x390c38d9 _dispatch_worker_thread2 + 53
21 libsystem_pthread.dylib 0x391eec15 _pthread_wqthread + 297
22 libsystem_pthread.dylib 0x391eead8 start_wqthread + 4
Thread 9 crashed with ARM Thread State (32-bit):
r0: 0x00000004 r1: 0x00000000 r2: 0x00000000 r3: 0x00000000
r4: 0x276ea000 r5: 0x00060001 r6: 0x00008983 r7: 0x276e9fe0
r8: 0x00000000 r9: 0xfffffffb r10: 0x00000000 r11: 0x00000000
ip: 0x00000170 sp: 0x276e9fc8 lr: 0x391eec23 pc: 0x39189c70
cpsr: 0x40000010