StackFrameSymbolName = '_xpc_objc_’s Senior Vice President of Software Engineering, Craig Federighi, is not only impressed with the release, but wishes it was around in his early days of coding: StackFrameSymbolName = '_UIApplicationMain' StackFrameSymbolName = '_UINSApplicationMain' StackFrameSymbolName = '_NSApplicationMainWithInfoDictionary' StackFrameSymbolName = '_NSApplicationMain' StackFrameSymbolName = '_BlockUntilNextEventMatchingListInModeWithFilter' StackFrameSymbolName = '_ReceiveNextEventCommon' StackFrameSymbolName = '_RunCurrentEventLoopInMode' StackFrameSymbolName = '_CFRunLoopRunSpecific' StackFrameSymbolName = '_CFRunLoopDoBlocks' StackFrameSymbolName = '_CFRUNLOOP_IS_CALLING_OUT_TO_A_BLOCK_' StackFrameFile = '/Users/dazaxer/Library/Mobile Documents/iCloud~com~apple~Playgrounds/Documents/Learn to Code 2.playgroundbook/Contents/Chapters/aygroundchapter/Pages/09.playgroundpage/LiveView.swift' StackFrameSymbolName = '_$s13Document13_0912presentWorldyyF' StackFrameFile = '/Users/dazaxer/Library/Mobile Documents/iCloud~com~apple~Playgrounds/Documents/Learn to Code 2.playgroundbook/Contents/Modules/Document13_09.playgroundmodule/Sources/SetUp.swift' StackFrameSymbolName = '_$s4Book17setUpLiveViewWithyyAA9GridWorldCF' StackFrameFile = '/Users/dazaxer/Library/Mobile Documents/iCloud~com~apple~Playgrounds/Documents/Learn to Code 2.playgroundbook/Contents/Modules/aygroundmodule/Sources/LiveViewConfiguration.swift' StackFrameSymbolName = '_$s4Book15SceneControllerC5sceneAcA0B0C_tcfC' StackFrameSymbolName = '_$s4Book15SceneControllerC5sceneAcA0B0C_tcfc' StackFrameFile = '/Users/dazaxer/Library/Mobile Documents/iCloud~com~apple~Playgrounds/Documents/Learn to Code 2.playgroundbook/Contents/Modules/aygroundmodule/Sources/SceneController.swift' StackFrameSymbolName = '_$sSo7SCNViewCABycfC' StackFrameSymbolName = '_C3DEngineContextSetRenderContext'

['DispatchQueueName': -thread, 'StackFrameDictionaries': (ĬrashAnnotationMessage = '*** CFRetain() called with NULL ***' Which model of macbook Pro are you using? I personaly use the 2008 model with a patcher for having Catalina and I think that this happens because of the old GPU but if you have a newer model and you also having this problem, something else happens.Įrror: *** CFRetain() called with NULL *** And this is the error I have the same problem.

Swift playground on macbook pro