Error with NSFetchedResultsController. -copyWithZone: cannot be sent to an abstract object of class NSPredicate: Create a concrete instance!

[codebeaulieu]

I'm getting an interesting crash while running the setupTableView function on the following line:

let frc = NSFetchedResultsController(fetchRequest: request, managedObjectContext: managedObjectContext, sectionNameKeyPath: nil, cacheName: nil)

Just before I instantiate the NSFetchedResultsController I run a check to see if the ManageObjectContext exists and it does. Then I step into the NSFetchedResultsController object and it sets the managedObjectContext from my controller and then immediately crashes.

Any insight would be appriciated.

I get the following error:

'NSInvalidArgumentException', reason: '*** -copyWithZone: cannot be sent to an abstract object of class NSPredicate: Create a concrete instance!'

[edit: removed stack trace, see comment below]

[codebeaulieu]

The problem here was that in my setup I failed to set my fetch request properly before passing it into the NSFetchedResultsController.