当我从我的应用程序中检查崩溃时，有些用户正在报告崩溃问题。它给我下面的堆栈跟踪。我用新的模型版本更新了我的核心数据（使用轻量级迁移）。我在我的应用程序中使用Restkit和Magical Records。我没有得到什么问题？
>>0 libobjc.A.dylib 0x353a16ba objc_retain + 8
! 1 Provider 0x00aeb701 __78-[RKManagedObjectRequestOperation obtainPermanentObjectIDsForInsertedObjects:]_block_invoke (RKManagedObjectRequestOperation.m:885)
2 CoreData 0x26c7496b developerSubmittedBlockToNSManagedObjectContextPerform + 180
3 libdispatch.dylib 0x35917c6f _dispatch_client_callout + 20
4 libdispatch.dylib 0x35921559 _dispatch_barrier_sync_f_invoke + 46
5 CoreData 0x26c74857 -[NSManagedObjectContext performBlockAndWait:] + 200
6 Provider 0x00aeb555 -[RKManagedObjectRequestOperation obtainPermanentObjectIDsForInsertedObjects:] (RKManagedObjectRequestOperation.m:882)
7 Provider 0x00ae8c67 __79-[RKManagedObjectRequestOperation performMappingOnResponseWithCompletionBlock:]_block_invoke348 (RKManagedObjectRequestOperation.m:645)
8 Provider 0x00b15961 -[RKResponseMapperOperation willFinish] (RKResponseMapperOperation.m:325)
9 Provider 0x00b1609d -[RKResponseMapperOperation main] (RKResponseMapperOperation.m:412)
10 Foundation 0x27b7cb0d -[__NSOperationInternal _start:] + 766
11 Foundation 0x27c21d93 __NSOQSchedule_f + 184
12 libdispatch.dylib 0x359224d3 _dispatch_queue_drain$VARIANT$mp + 1460
13 libdispatch.dylib 0x35921da1 _dispatch_queue_invoke$VARIANT$mp + 82
14 libdispatch.dylib 0x35924491 _dispatch_root_queue_drain + 386
15 libdispatch.dylib 0x359258a3 _dispatch_worker_thread3 + 104
16 libsystem_pthread.dylib 0x35a99d9d _pthread_wqthread + 666
17 libsystem_pthread.dylib 0x35a99af0 start_wqthread + 6