Open Radar

 
Summary:

NSManagedObjectIDs created using -[NSIncrementalStore newObjectIDForEntity:referenceObject:] are never released under ARC. This is causing them to leak later on.

Steps to Reproduce:

I reproduced the problem simply by running this method somewhere in my NSIncrementalStore subclass and having an NSManagedObjectID category logging deallocs.

- (void)deadObjectIDs:(NSRelationshipDescription *)relationship
{
	NSEntityDescription *relatedEntity = relationship.destinationEntity;
	
	NSManagedObjectID *testObjectID1 = [self newObjectIDForEntity:relatedEntity referenceObject:@"Some-ID"];
	NSLog( @"testObjectID1: %p", testObjectID1 );
	
	NSManagedObjectID *testObjectID2 = [[NSManagedObjectID alloc] init];
	NSLog( @"testObjectID2: %p", testObjectID2 );
}

Further, I can pass nil for both the entity and referenceObject to the same result.


Expected Results:

That both testObjectID1 and testObjectID2 would show up deallocated when the method ends.


Actual Results:

When run twice, the method and category produce the following log output:

2013-03-27 16:26:04.533 PCR[7763:1a903] testObjectID1: 0xa69b520
2013-03-27 16:26:04.534 PCR[7763:1a903] testObjectID2: 0xa2dcab0
2013-03-27 16:26:09.382 PCR[7763:1a903] NSManagedObjectID dealloc: 0xa2dcab0
2013-03-27 16:26:11.905 PCR[7763:1a903] testObjectID1: 0xa257cd0
2013-03-27 16:26:11.905 PCR[7763:1a903] testObjectID2: 0xa69b520
2013-03-27 16:26:13.108 PCR[7763:1a903] NSManagedObjectID dealloc: 0xa69b520

So, testObjectID1 is never being released and in fact shows up as a leak in Instruments.


Regression:

Occurs all the time

Notes:

This is an ARC enabled project.