Open Radar

 
Summary:  dupe of rdar://13225912

An app uses iCloud to store core data files.  When receiving a data update the update is empty even though there was a valid change to cause the update to be sent.

$0 = 0x1f5c64e0 NSConcreteNotification 0x1f5c64e0 {name = com.apple.coredata.ubiquity.importer.didfinishimport; object = <NSPersistentStoreCoordinator: 0x1f553130>; userInfo = {
deleted = "{(\n)}";
inserted = "{(\n)}";
updated = "{(\n)}";
}}


Steps to Reproduce:

To recreate with the WWDC 2012 Sample Code (SharedCoreData_IOS):
 
- Open the app on two devices *running iOS 6.1* with a freshly created ubiquity store.
- Add an item on Device A.
- Wait for item to sync to Device B.
- Edit item on Device B (Change a few characters in the name) and save.



Expected Results:
A com.apple.coredata.ubiquity.importer.didfinishimport notification with a userInfo dictionary for the change.


Actual Results:

An empty com.apple.coredata.ubiquity.importer.didfinishimport notification.

Regression:

Notes:

The sync works correctly 3 out of 5 times.