我的iOS应用程序崩溃了，它没有显示我可以查看的任何相关文件名（只显示main.m）。有关问题的任何指示？
Exception Type: SIGSEGV
Exception Codes: SEGV_ACCERR at 0x7ebf14b8
Crashed Thread: 0
Thread 0 Crashed:
0 libobjc.A.dylib 0x3892860c objc_retain + 12
1 CoreData 0x2defa915 -[NSFetchedResultsController(PrivateMethods) _managedObjectContextDidChange:] + 4013
2 CoreFoundation 0x2e144f41 __CFNOTIFICATIONCENTER_IS_CALLING_OUT_TO_AN_OBSERVER__ + 13
3 CoreFoundation 0x2e0b8da9 _CFXNotificationPost + 1721
4 Foundation 0x2eaa3cc5 -[NSNotificationCenter postNotificationName:object:userInfo:] + 73
5 CoreData 0x2def994b -[NSManagedObjectContext(_NSInternalNotificationHandling) _postObjectsDidChangeNotificationWithUserInfo:] + 79
6 CoreData 0x2def98e3 -[NSManagedObjectContext(_NSInternalChangeProcessing) _createAndPostChangeNotification:withDeletions:withUpdates:withRefreshes:] + 299
7 CoreData 0x2def7f9f -[NSManagedObjectContext(_NSInternalChangeProcessing) _processRecentChanges:] + 2323
8 CoreData 0x2df61c21 -[NSManagedObjectContext(_NestedContextSupport) _parentProcessSaveRequest:inContext:error:] + 1313
9 CoreData 0x2df6256f __82-[NSManagedObjectContext(_NestedContextSupport) executeRequest:withContext:error:]_block_invoke + 563
10 libdispatch.dylib 0x38e08b3b _dispatch_barrier_sync_f_slow_invoke + 71
11 libdispatch.dylib 0x38e02d3f _dispatch_client_callout + 23
12 libdispatch.dylib 0x38e056c3 _dispatch_main_queue_callback_4CF + 279
13 CoreFoundation 0x2e14d681 __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ + 9
14 CoreFoundation 0x2e14bf4d __CFRunLoopRun + 1309
15 CoreFoundation 0x2e0b6769 CFRunLoopRunSpecific + 525
16 CoreFoundation 0x2e0b654b CFRunLoopRunInMode + 107
17 GraphicsServices 0x330236d3 GSEventRunModal + 139
18 UIKit 0x30a15891 UIApplicationMain + 1137
19 MyApp 0x00034f7f main (main.m:18)