在我的应用程序中，我将数据保存到主线程\队列中的coredata，并在保存后立即获取所有记录以确保我没有超过本地存储的大小。
所有都在主线程上同步发生。
我随机崩溃了：
[NSManagedObjectContext（_NSInternalChangeProcessing）_processRecentChanges：] + 2284
核心数据具有索引属性，我想知道在保存返回后是否发生索引生成，并且在索引期间fetch捕获数据库并且失败了吗？
另外我看到另一个帖子NSPersistentStoreCoordinator。
这是什么意思？我专门发送coredata操作在主线程中执行。 coredata会在内部将其发送到另一个线程吗？
这可能导致车祸？非常感谢任何帮助！
堆栈跟踪如下所示：
Thread : Crashed: com.apple.main-thread
0 CoreFoundation 0x000000018214602c __CFBasicHashDrain + 196
1 CoreFoundation 0x0000000182145f9c __CFBasicHashDrain + 52
2 CoreData 0x0000000181de28c8 -[NSManagedObjectContext(_NSInternalChangeProcessing) _processRecentChanges:] + 2284
3 CoreData 0x0000000181ddadc4 _performRunLoopAction + 384
4 CoreFoundation 0x00000001820cc2a4 __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 32
5 CoreFoundation 0x00000001820c9230 __CFRunLoopDoObservers + 360
6 CoreFoundation 0x00000001820c9610 __CFRunLoopRun + 836
7 CoreFoundation 0x0000000181ff52d4 CFRunLoopRunSpecific + 396
8 GraphicsServices 0x000000018b80b6fc GSEventRunModal + 168
9 UIKit 0x0000000186bbafac UIApplicationMain + 1488
10 MyApp 0x000000010002ba88 main (main.m:16)
11 libdyld.dylib 0x0000000193fb6a08 start + 4
Thread : NSPersistentStoreCoordinator 0x170666900
0 libsystem_platform.dylib 0x00000001941616a4 OSAtomicCompareAndSwap64Barrier + 12
1 libsystem_pthread.dylib 0x0000000194169428 _pthread_mutex_lock + 312
2 libsqlite3.dylib 0x0000000193c89d0c (null) + 20676
3 libsqlite3.dylib 0x0000000193cb30ec (null) + 20388
4 libsqlite3.dylib 0x0000000193cb27ac (null) + 18020
5 libsqlite3.dylib 0x0000000193cb255c (null) + 17428
6 libsqlite3.dylib 0x0000000193c85688 (null) + 2624
7 libsqlite3.dylib 0x0000000193caccf0 (null) + 56216
8 libsqlite3.dylib 0x0000000193c9f368 sqlite3_step + 528
9 CoreData 0x0000000181db47e8 _execute + 124
10 CoreData 0x0000000181dc5574 -[NSSQLiteConnection fetchResultSet:usingFetchPlan:] + 1664
11 CoreData 0x0000000181ec48f4 newFetchedRowsForFetchPlan_MT + 1544
12 CoreData 0x0000000181dcf4bc -[NSSQLCore fetchRowForObjectID:] + 1080
13 CoreData 0x0000000181dcedc0 -[NSSQLCore newValuesForObjectWithID:withContext:error:] + 280
14 CoreData 0x0000000181e89524 __95-[NSPersistentStoreCoordinator(_NSInternalMethods) newValuesForObjectWithID:withContext:error:]_block_invoke + 76
15 CoreData 0x0000000181e90028 gutsOfBlockToNSPersistentStoreCoordinatorPerform + 184
16 libdispatch.dylib 0x0000000193f89954 _dispatch_client_callout + 16
17 libdispatch.dylib 0x0000000193f931e4 _dispatch_barrier_sync_f_invoke + 76
18 CoreData 0x0000000181e81e98 _perform + 180
19 CoreData 0x0000000181dcebf0 -[NSPersistentStoreCoordinator(_NSInternalMethods) newValuesForObjectWithID:withContext:error:] + 160
20 CoreData 0x0000000181dce210 _PFFaultHandlerLookupRow + 352
21 CoreData 0x0000000181dcdc84 _PF_FulfillDeferredFault + 252
22 CoreData 0x0000000181dcda70 _sharedIMPL_pvfk_core + 116
23 CoreData 0x0000000181dde638 _PF_Handler_Public_GetProperty + 176
24 Foundation 0x0000000182f2c7c4 _sortedObjectsUsingDescriptors + 384
25 Foundation 0x0000000182f6a94c -[NSArray(NSKeyValueSorting) sortedArrayUsingDescriptors:] + 608
26 CoreData 0x0000000181dba32c -[NSManagedObjectContext executeFetchRequest:error:] + 3796
27 MyApp 0x00000001001b2b2c static MyApp.CacheHelper.fetchCacheEntriesInAscendingOrderByAccess (MyApp.CacheHelper.Type)(Swift.String) -> Swift.Optional<Swift.Array<Swift.AnyObject>> (CacheHelper.swift:155)
28 MyApp 0x0000000100145ee8 function signature specialization <Arg[0] = Owned To Guaranteed> of MyApp.Base.controlCapacity (MyApp.Base)() -> () (Base.swift:45)
29 MyApp 0x00000001001450a0 MyApp.Base.controlCapacity (MyApp.Base)() -> () (Base.swift)
30 MyApp 0x0000000100145c74 MyApp.Base.setCacheEntryInternal (MyApp.Base)(MyApp.CacheEntry) -> () (Base.swift:120)
31 libdispatch.dylib 0x0000000193f89994 _dispatch_call_block_and_release + 24
32 libdispatch.dylib 0x0000000193f89954 _dispatch_client_callout + 16
33 libdispatch.dylib 0x0000000193f940a4 _dispatch_queue_drain + 1448
34 libdispatch.dylib 0x0000000193f8ca5c _dispatch_queue_invoke + 132
35 libdispatch.dylib 0x0000000193f96318 _dispatch_root_queue_drain + 720
36 libdispatch.dylib 0x0000000193f97c4c _dispatch_worker_thread3 + 108
37 libsystem_pthread.dylib 0x000000019416922c _pthread_wqthread + 816`