App rejected for crash on persistenstore creation

问题

My app got rejected for crash on launch and after symbolizing the crash log i have this:

Incident Identifier: --
CrashReporter Key:   --
Hardware Model:      xxx
Process:             BUDGT [1029]
Path:                /private/var/mobile/Containers/Bundle/Application/F5D98A63-AF73-4A76-A80C-EA57B4E41082/BUDGT.app/BUDGT
Identifier:          --.BUDGT
Version:             1 (4)
Code Type:           ARM-64 (Native)
Parent Process:      launchd [1]

Date/Time:           2015-05-08 18:09:23.379 -0700
Launch Time:         2015-05-08 18:09:23.142 -0700
OS Version:          iOS 8.3 (12F70)
Report Version:      105

Exception Type:  EXC_CRASH (SIGABRT)
Exception Codes: 0x0000000000000000, 0x0000000000000000
Triggered by Thread:  0

Thread 0 name:  Dispatch queue: com.apple.main-thread
Thread 0 Crashed:
0   libsystem_kernel.dylib          0x0000000197acb270 __pthread_kill + 8
1   libsystem_pthread.dylib         0x0000000197b6916c pthread_kill + 108
2   libsystem_c.dylib               0x0000000197a42b14 abort + 108
3   BUDGT                           0x000000010009ee5c -[AppDelegate persistentStoreCoordinator] (AppDelegate.m:222)
4   BUDGT                           0x000000010009e96c -[AppDelegate managedObjectContext] (AppDelegate.m:153)
5   BUDGT                           0x00000001000a0abc -[Factory setupDataHandler] (Factory.m:54)
6   BUDGT                           0x00000001000a0830 -[Factory init] (Factory.m:30)
7   BUDGT                           0x00000001000a07c4 __25+[Factory defaultFactory]_block_invoke (Factory.m:22)
8   libdispatch.dylib               0x0000000197985950 _dispatch_client_callout + 12
9   libdispatch.dylib               0x0000000197986828 dispatch_once_f + 92
10  BUDGT                           0x00000001000a0794 +[Factory defaultFactory] (once.h:68)
11  BUDGT                           0x000000010009dab8 -[AppDelegate application:didFinishLaunchingWithOptions:] (AppDelegate.m:17)
12  UIKit                           0x000000018a5c318c -[UIApplication _handleDelegateCallbacksWithOptions:isSuspended:restoreState:] + 400
13  UIKit                           0x000000018a7da850 -[UIApplication _callInitializationDelegatesForMainScene:transitionContext:] + 2372
14  UIKit                           0x000000018a7dd204 -[UIApplication _runWithMainScene:transitionContext:completion:] + 1500
15  UIKit                           0x000000018a7db774 -[UIApplication workspaceDidEndTransaction:] + 180
16  FrontBoardServices              0x000000018e3193c4 __31-[FBSSerialQueue performAsync:]_block_invoke_2 + 28
17  CoreFoundation                  0x0000000185ac8278 __CFRUNLOOP_IS_CALLING_OUT_TO_A_BLOCK__ + 16
18  CoreFoundation                  0x0000000185ac7380 __CFRunLoopDoBlocks + 308
19  CoreFoundation                  0x0000000185ac59a4 __CFRunLoopRun + 1752
20  CoreFoundation                  0x00000001859f12d0 CFRunLoopRunSpecific + 392
21  UIKit                           0x000000018a5bc438 -[UIApplication _run] + 548
22  UIKit                           0x000000018a5b6fa8 UIApplicationMain + 1484
23  BUDGT                           0x000000010009da38 main (main.m:16)
24  libdyld.dylib                   0x00000001979b2a04 start + 0

this means it must have failed here at abort() in my AppDelegate

- (NSPersistentStoreCoordinator *)persistentStoreCoordinator
{

    if (persistentStoreCoordinator != nil)
    {
        return persistentStoreCoordinator;
    }
    NSError *error = nil;
    persistentStoreCoordinator = [[NSPersistentStoreCoordinator alloc] initWithManagedObjectModel:[self managedObjectModel]];
    NSURL *storeURL = [[self applicationDocumentsDirectory] URLByAppendingPathComponent:@"database.sqlite"];
    NSPersistentStoreCoordinator *psc = persistentStoreCoordinator;
    NSDictionary *options = [NSDictionary dictionaryWithObjectsAndKeys:
                             [NSNumber numberWithBool:YES], NSMigratePersistentStoresAutomaticallyOption,
                             [NSNumber numberWithBool:YES], NSInferMappingModelAutomaticallyOption, nil];

    NSPersistentStore *store = [psc addPersistentStoreWithType:NSSQLiteStoreType
                                                 configuration:nil URL:storeURL
                                                       options:options error:&error];
    if (!store) {
        NSLog(@"Unresolved Error");
        abort();   // This is line 222 of AppDelegate
    }


    return persistentStoreCoordinator;
}

getting the directory like this:

- (NSURL *)applicationDocumentsDirectory {
    return [[[NSFileManager defaultManager] URLsForDirectory:NSDocumentDirectory inDomains:NSUserDomainMask] lastObject];
}

and the mom like that:

- (NSManagedObjectModel *)managedObjectModel {
    if (managedObjectModel != nil)
    {
        return managedObjectModel;
    }
    managedObjectModel = [NSManagedObjectModel mergedModelFromBundles:nil] ;

    return managedObjectModel;
}

Apples rejection message:

We could not review your app as it crashes on startup.

i personally cannot reproduce the problem.

both an update to my devices and simulators - as well as clean builds run just fine without any issues.

the things i changed in this application was:

support for app groups (coredata container is not in the app group container)
changed to cocoapods for linking
added WatchKit App
added Today Extension
migrated all views to use AutoLayout (Masonry)

however I am not accessing core data through the app group container, it still only sits on the phone (and should stay there) i am using the app group for something different (pass simple messages through it).

any ideas what might be causing this to crash the app on startup with apples review team?

deployment target is iOS 8.2 (for all the app & extensions)

update

i just manually installed the submitted archive (the original build for the app store submission) to a cleaned device. everything works perfectly. no issues, no crashes.

what else can I Check?