在核心数据标准迁移过程中应用崩溃，没有错误

Question

When trying to update core data using standard migration, the app crashes without an error message. It has all the standard log messages up to this:

CoreData: sql: INSERT INTO ZENTRY(Z_PK, Z_ENT, Z_OPT, ZLOCATION, ZBOOKMARKED, ZCREATIONDATE, ZENTRYID, ZMESSAGE, ZSECTIONIDENTIFIER, ZTICDSSYNCID, ZVERSION) VALUES(?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)
CoreData: sql: COMMIT
CoreData: sql: SELECT 0, t0.Z_PK, t0.Z_OPT, t0.ZISINPHOTOLIBRARY, t0.ZLARGETHUMBNAIL, t0.ZMOVIE, t0.ZORIGINALHEIGHT, t0.ZORIGINALIMAGE, t0.ZORIGINALWIDTH, t0.ZSCREENSIZEIMAGE, t0.ZTHUMBNAIL, t0.ZTYPE, t0.ZENTRY, t0.Z_FOK_ENTRY FROM ZMEDIA t0 

It lingers on that for a few seconds, before crashing to the home screen with no further log message.

The code before the crash is:

persistentStoreCoordinator = [[NSPersistentStoreCoordinator alloc] initWithManagedObjectModel:[self managedObjectModel]];

NSURL *storeUrl = [NSURL fileURLWithPath:storePath];
    NSError *error;
    NSDictionary *pscOptions = [NSDictionary dictionaryWithObjectsAndKeys:[NSNumber numberWithBool:YES], NSMigratePersistentStoresAutomaticallyOption,
                                [NSNumber numberWithBool:NO], NSInferMappingModelAutomaticallyOption,
                                nil];

Then it crashes on this line:

if (![persistentStoreCoordinator addPersistentStoreWithType:NSSQLiteStoreType configuration:nil URL:storeUrl options:pscOptions error:&error]) {

        NSLog(@"Unresolved error %@, %@", error, [error userInfo]);
    } 

It doesn't even reach that unresolved error line.

Answer 1

Maybe you've got the same issue I described in my answer here (You modified model without creating a new model version).

And a great helper for you could be wrapping line with problem in @try @catch block and see what it catches like this:

@try
{
    if (![persistentStoreCoordinator addPersistentStoreWithType:NSSQLiteStoreType configuration:nil URL:storeUrl options:pscOptions error:&error])
    {
        NSLog(@"Unresolved error %@, %@", error, [error userInfo]);
    }
}
@catch(NSException* ex)
{
    NSLog(@"Exception: %@", ex);
}

It helps understanding problems.