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We're seeing a crash that is only reproducible on a device with iOS 14+ when running our app built using Xcode 12.0.1 (latest iOS 14 SDKs). The exception is thrown when doing a fetch request for a managed object from our Core Data store. Below is the call stack from the exception. I thought we might be resetting the context while this request was being made, but we're not. Has anyone else been seeing this or have an idea on the cause?
Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'Can't get value for 'batch' in bindings {
}.' First throw call stack:
(
		0	 CoreFoundation											0x00007fff2043a126 __exceptionPreprocess + 242
		1	 libobjc.A.dylib										 0x00007fff20177f78 objc_exception_throw + 48
		2	 Foundation													0x00007fff2088bedc -[NSVariableExpression _expressionWithSubstitutionVariables:] + 0
		3	 Foundation													0x00007fff2075ac7b -[NSComparisonPredicate evaluateWithObject:substitutionVariables:] + 264
		4	 CoreData														0x00007fff2511ec68 -[NSDictionaryStoreMap handleFetchRequest:] + 481
		5	 CoreData														0x00007fff2511dfd2 -[NSMappedObjectStore executeFetchRequest:withContext:] + 230
		6	 CoreData														0x00007fff251e10a2 __65-[NSPersistentStoreCoordinator executeRequest:withContext:error:]_block_invoke.797 + 3219
		7	 CoreData														0x00007fff251d988d __55-[NSPersistentStoreCoordinator _routeHeavyweightBlock:]_block_invoke + 55
		8	 CoreData														0x00007fff251edf0a gutsOfBlockToNSPersistentStoreCoordinatorPerform + 182
		9	 libdispatch.dylib									 0x000000010a6b0a88 _dispatch_client_callout + 8
		10	libdispatch.dylib									 0x000000010a6bfcac _dispatch_lane_barrier_sync_invoke_and_complete + 132
		11	CoreData														0x00007fff251d9492 _perform + 169
		12	CoreData														0x00007fff251d9740 -[NSPersistentStoreCoordinator _routeHeavyweightBlock:] + 172
		13	CoreData														0x00007fff250d640e -[NSPersistentStoreCoordinator executeRequest:withContext:error:] + 1684
		14	CoreData														0x00007fff250d49c2 -[NSManagedObjectContext executeFetchRequest:error:] + 885
		15	CoreData														0x00007fff251a9d7f -[NSManagedObjectContext _parentObjectsForFetchRequest:inContext:error:] + 477
		16	CoreData														0x00007fff251aa774 __82-[NSManagedObjectContext(_NestedContextSupport) executeRequest:withContext:error:]_block_invoke + 603
		17	CoreData														0x00007fff25109de8 internalBlockToNSManagedObjectContextPerform + 89
		18	libdispatch.dylib									 0x000000010a6b0a88 _dispatch_client_callout + 8
		19	libdispatch.dylib									 0x000000010a6bfcac _dispatch_lane_barrier_sync_invoke_and_complete + 132
		20	CoreData														0x00007fff25109d6f _perform + 196
		21	CoreData														0x00007fff25109b93 -[NSManagedObjectContext(_NestedContextSupport) executeRequest:withContext:error:] + 175
		22	CoreData														0x00007fff250d49c2 -[NSManagedObjectContext executeFetchRequest:error:] + 885
		23	CoreData														0x00007fff251a9d7f -[NSManagedObjectContext _parentObjectsForFetchRequest:inContext:error:] + 477
		24	CoreData														0x00007fff251aa774 __82-[NSManagedObjectContext(_NestedContextSupport) executeRequest:withContext:error:]_block_invoke + 603
		25	CoreData														0x00007fff25109de8 internalBlockToNSManagedObjectContextPerform + 89
		26	libdispatch.dylib									 0x000000010a6b0a88 _dispatch_client_callout + 8
		27	libdispatch.dylib									 0x000000010a6bfe11 _dispatch_async_and_wait_invoke + 175
		28	libdispatch.dylib									 0x000000010a6b0a88 _dispatch_client_callout + 8
		29	libdispatch.dylib									 0x000000010a6bef23 _dispatch_main_queue_callback_4CF + 1152
		30	CoreFoundation											0x00007fff203a8276 CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE + 9
		31	CoreFoundation											0x00007fff203a2b06 __CFRunLoopRun + 2685
		32	CoreFoundation											0x00007fff203a1b9e CFRunLoopRunSpecific + 567
		33	GraphicsServices										0x00007fff2b773db3 GSEventRunModal + 139
		34	UIKitCore													 0x00007fff24660af3 -[UIApplication _run] + 912
		35	UIKitCore													 0x00007fff24665a04 UIApplicationMain + 101
		36	XXXX																0x0000000106de2d69 main + 153
		37	libdyld.dylib											 0x00007fff20257415 start + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'Can't get value for 'batch' in bindings {
}.'
Posted
by
sstennis.
Last updated
sstennis.
.