I keep getting crashes from a save: command on a managedObjectContext. It doesn't even fulfill the NSLog statement so I don't see the unresolved error statement, so I can't figure out what the problem might be. It doesn't happen every time, but only sporadically.
Here's the code (which basically wants to increment a counter):
if ([[managedObject valueForKey:@"canSee"]boolValue]){
int read = [[managedObject valueForKey:@"timesRead"] intValue] +1;
[managedObject setValue:[NSNumber numberWithInt:read] forKey:@"timesRead"];
NSError *error;
if (![resultsController.managedObjectContext save:&error]) { //<-- crashes on this line!
NSLog(@"Unresolved Core Data Save error %@, %@", error, [error userInfo]);
exit(-1);
}
In the console window I get messages like this:
2010-08-20 08:12:20.594 AppName[23501:207] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[__NSCFSet controllerWillChangeContent:]: unrecognized selector sent to instance 0xe54f560'
or this:
2010-08-20 08:12:20.594 AppName[23501:207] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[__NSCFSet controllerWillChangeContent:]: unrecognized selector sent to instance 0xe54f560'
or even this:
2010-08-19 23:09:59.337 AppName[761:307] Serious application error. Exception was caught during Core Data change processing. This is usually a bug within an observer of NSManagedObjectContextObjectsDidChangeNotification. -[UITableViewLabel controllerWillChangeContent:]: unrecognized selector sent to instance 0x7f0a860 with userInfo (null)
2010-08-19 23:09:59.356 AppName[761:307] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[UITableViewLabel controllerWillChangeContent:]: unrecognized selector sent to instance 0x7f0a860'
Then it shows the call stack at first throw, followed by a notice (terminate called after throwing an instance of 'NSException', '[Switching to process 23501]' and 'Program received signal: “SIGABRT”.'
I think the problem has something to do with CoreData but I'm not sure. I've cleaned my build and targets and it doesn't seem to help. I've tried locking/unlocking the ManagedObjectContext and it doesn't help.
Any ideas here on where to start to look for a resolution would be greatly appreciated!