I'm having a problem that shows up when I do a Save As on my core data based app. Saving my document is fine, so long as I save under the same name (either with a new document or one I have loaded), but when I do a save as, I get the following error:
malloc: *** error for object 0x114e74cb0: pointer being freed was not allocated and the stack trace shows: #0 0x00007fff813a811c in objc_msgSend () #1 0x00007fff81bed2ec in -[NSManagedObjectContext(_NSInternalAdditions) _dispose:] () #2 0x00007fff81becfd2 in -[NSManagedObjectContext dealloc] () #3 0x00007fff81bdc0a3 in -[NSManagedObjectContext release] () #4 0x00007fff81eb1246 in _CFAutoreleasePoolPop () #5 0x00007fff85db22f8 in -[NSAutoreleasePool drain] () #6 0x00007fff81c30eb9 in -[NSPersistentStoreCoordinator migratePersistentStore:toURL:options:withType:error:] () #7 0x00007fff84a817e2 in -[NSPersistentDocument writeToURL:ofType:forSaveOperation:originalContentsURL:error:] () #8 0x0000000100032409 in -[NMPersistentDocument writeToURL:ofType:forSaveOperation:originalContentsURL:error:] (self=0x100d5b050, _cmd=0x7fff84d2a59e, absoluteURL=0x119c2ee30, typeName=0x100819d00, saveOperation=1, absoluteOriginalContentsURL=0x100a12640, error=0x7fff5fbfdea8) at /Users/gideon/Development/svn/trunk/mac/Source/NMPersistentDocument.m:306 If I enable zombies, it shows *** -[NSManagedObjectContext _processReferenceQueue:]: message sent to deallocated instance 0x11ec0e6b0 Now initially I thought the issue must be that I was not removing observers or something like that (which may still be true), but the interesting thing is that in my subclass of NSPersistentDocument, in the init method, I change the managed object context to my own one as follows: NSPersistentStoreCoordinator *coordinator = [[self managedObjectContext] persistentStoreCoordinator]; NMManagedObjectContext *context = [[NMManagedObjectContext alloc] init]; [context setPersistentStoreCoordinator:coordinator]; [self setManagedObjectContext:context]; [context release]; ...but that is not reflected in the stack trace - it is always talking about an ordinary NSManagedObjectContext. So I think maybe there is a problem with me using my own custom managed object context in this way, and perhaps when it migrates the persistent store, maybe somewhere there it reverts to a standard managed object context or something. Does this sound like a likely scenario? Or am I barking up the wrong tree? I am using a subclass of NSAtomicStore at the storage - is there something in there that I should be doing to make sure we are using the right context? What is the best way to debug something like this? TIA Gideon _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
