iOS app crashed in thread wihtout app actions - ios

Question

My iOS application crashed. In crash log I've found such info:
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
I have no idea how to interpret this. There are some additional actions happening in other thread but they looks ok. Any idea why thread which does nothing crashed?
Full crash report:
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