22047995: Core Data: executeFetchRequest:error: leads to SQLite error code:522, 'not an error'

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Description

Summary:

I’m running the tests of my project, code can be found here: https://github.com/contentful/contentful.objc

The Core Data part of the test suite has been working fine for iOS 6, 7 and 8, but when running the tests using Xcode 7 / iOS 9 in the iOS simulator, I’m receiving an “SQLite error code:522, 'not an error’”. You can find the full console output attached to this bug report.

More specifically, the failing test is “-[CoreDataBasicTests testContinueSyncWithSameManager]” — it fails every time and the error is quite non-descriptive.

Steps to Reproduce:

1. Run the test suite of https://github.com/contentful/contentful.objc

Expected Results:

The test suite passes, as it does on iOS 8 using Xcode 6.4

Actual Results:

The test “-[CoreDataBasicTests testContinueSyncWithSameManager]” fails because of “SQLite error code:522, 'not an error’”.

Regression:

This has been working fine for multiple iOS releases, as described above.

Notes:

I’m open to the possibility that this is my fault, but the error message needs to be a lot more descriptive.

Product Version:
Created: 2015-07-29 09:11:29.910310
Originated: 2015-07-29T11:11:00
Open Radar Link: http://www.openradar.me/22047995