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?
Code Block * 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 { }.'
