Error Buid Xcode 7 ToDoList

2016-02-28 12:54:39.229 GerenciadorTarefas[2743:165901] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'An instance of NSFetchedResultsController requires a fetch request with sort descriptors'
*** First throw call stack:
(
	0   CoreFoundation                      0x0061fa14 __exceptionPreprocess + 180
	1   libobjc.A.dylib                     0x022d3e02 objc_exception_throw + 50
	2   CoreData                            0x0029a33d -[NSFetchedResultsController initWithFetchRequest:managedObjectContext:sectionNameKeyPath:cacheName:] + 2317
	3   GerenciadorTarefas                  0x000837f9 _TTOFCSo26NSFetchedResultsControllercfMS_FT12fetchRequestCSo14NSFetchRequest20managedObjectContextCSo22NSManagedObjectContext18sectionNameKeyPathGSqSS_9cacheNameGSqSS__S_ + 249
	4   GerenciadorTarefas                  0x000834fd _TFCSo26NSFetchedResultsControllerCfMS_FT12fetchRequestCSo14NSFetchRequest20managedObjectContextCSo22NSManagedObjectContext18sectionNameKeyPathGSqSS_9cacheNameGSqSS__S_ + 237
	5   GerenciadorTarefas                  0x0007ff29 _TFC18GerenciadorTarefas7MainTVC6getFRCfS0_FT_CSo26NSFetchedResultsController + 249
	6   GerenciadorTarefas                  0x0008000a _TFC18GerenciadorTarefas7MainTVC11viewDidLoadfS0_FT_T_ + 106
	7   GerenciadorTarefas                  0x00080452 _TToFC18GerenciadorTarefas7MainTVC11viewDidLoadfS0_FT_T_ + 34
	8   UIKit                               0x00fca2ae -[UIViewController _sendViewDidLoadWithAppearanceProxyObjectTaggingEnabled] + 44
	9   UIKit                               0x00fcedce -[UIViewController loadViewIfRequired] + 1384
	10  UIKit                               0x0101a9f9 -[UINavigationController _layoutViewController:] + 52
	11  UIKit                               0x0101b2b1 -[UINavigationController _updateScrollViewFromViewController:toViewController:] + 421
	12  UIKit                               0x0101b458 -[UINavigationController _startTransition:fromViewController:toViewController:] + 145
	13  UIKit                               0x0101c854 -[UINavigationController _startDeferredTransitionIfNeeded:] + 1038
	14  UIKit                               0x0101dada -[UINavigationController __viewWillLayoutSubviews] + 68
	15  UIKit                               0x011f9c4a -[UILayoutContainerView layoutSubviews] + 252
	16  UIKit                               0x00ecf008 -[UIView(CALayerDelegate) layoutSublayersOfLayer:] + 810
	17  libobjc.A.dylib                     0x022e8059 -[NSObject performSelector:withObject:] + 70
	18  QuartzCore                          0x0524a80a -[CALayer layoutSublayers] + 144
	19  QuartzCore                          0x0523e4ee _ZN2CA5Layer16layout_if_neededEPNS_11TransactionE + 388
	20  QuartzCore                          0x0523e352 _ZN2CA5Layer28layout_and_display_if_neededEPNS_11TransactionE + 26
	21  QuartzCore                          0x05230e8b _ZN2CA7Context18commit_transactionEPNS_11TransactionE + 317
	22  QuartzCore                          0x05264e03 _ZN2CA11Transaction6commitEv + 561
	23  QuartzCore                          0x052656c4 _ZN2CA11Transaction17observer_callbackEP19__CFRunLoopObservermPv + 92
	24  CoreFoundation                      0x00538ffe __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 30
	25  CoreFoundation                      0x00538f5e __CFRunLoopDoObservers + 398
	26  CoreFoundation                      0x0052e108 CFRunLoopRunSpecific + 504
	27  CoreFoundation                      0x0052defb CFRunLoopRunInMode + 123
	28  UIKit                               0x00dfd206 -[UIApplication _run] + 540
	29  UIKit                               0x00e02bfa UIApplicationMain + 160
	30  GerenciadorTarefas                  0x000851ec main + 140
	31  libdyld.dylib                       0x02d47a21 start + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException
(lldb)