If you need help investigating a crash, please include a crash report in your post. To smooth things along, follow these guidelines: For information on how to get a crash report, see Acquiring crash reports and diagnostic logs. Include the whole crash report as a text attachment (click the paperclip icon and then choose Add File). This avoids clogging up the timeline while also preserving the wealth of information in the crash report. If you’re not able to post your crash report as an attachment, see Can’t Post Crash Report as Attachment below. If you want to highlight a section of the report, include it in the main body of your post. Put the snippet in a code block so that it renders nicely. To create a code block, add a delimiter line containing triple backquotes before and after the block, or just click the Code Block button. If possible, post an Apple crash report. Third-party crash reporters are often missing critical information and have general reliability problems (for an explanation as to why, see Implementing Your Own Crash Reporter). Symbolicate your crash report before posting it. For information on how to do this, see Adding identifiable symbol names to a crash report. If you need to redact the crash report, do so consistently. Imagine you’re building the WaffleVarnish app whose bundle ID is com.example.wafflevarnish but you want to keep your new waffle varnishing technology secret. Replace WaffleVarnish with WwwwwwVvvvvvv and com.example.wafflevarnish with com.eeeeeee.wwwwwwvvvvvvv. This keeps the text in the crash report aligned while making it possible to distinguish the human-readible name of the app (WaffleVarnish) from the bundle ID (com.example.wafflevarnish). Finally, for information on how to use a crash report to debug your own problems, see Diagnosing issues using crash reports and device logs. Can’t Post Crash Report as Attachment Crash reports have two common extensions: .crash and .ips. If you have an .ips file, please post that [1]. DevForums lets you attach a .crash file but not an .ips file (r. 117468172). To work around this, change the extension to .txt. If DevForums complains that your crash report “contains sensitive language”, leave it out of your initial post and attach it to a reply. That often avoids this roadblock. If you still can’t post your crash report, upload it to a file sharing service and include the URL in your post. Post the URL in the clear, per tip 14 in Quinn’s Top Ten DevForums Tips. Share and Enjoy — Quinn “The Eskimo!” @ Developer Technical Support @ Apple let myEmail = "eskimo" + "1" + "@" + "apple.com" [1] Because it’s easy to go from an .ips file to a .crash file. I usually do this by choosing File > Quick Look in the Finder. For more info about these file formats, see this post. Revision History: 2024-11-21 Added a recommendation to post the .ips format if possible. 2024-05-21 Added some advice regarding the “contains sensitive language” message. 2023-10-25 Added the Can’t Post Crash Report as Attachment section. Made other minor editorial changes. 2021-08-26 First posted.

General: DevForums tags: Debugging, LLDB, Graphical Debugger Xcode > Debugging documentation Diagnosing memory, thread, and crash issues early documentation Diagnosing issues using crash reports and device logs documentation Choosing a Network Debugging Tool documentation Testing a release build documentation Isolating Code Signing Problems from Build Problems DevForums post What is an exception? DevForums post Language Exception from RCTFatal DevForums post Standard Memory Debugging Tools DevForums post Using a Sysdiagnose Log to Debug a Hard-to-Reproduce Problem DevForums post Posting a Crash Report DevForums post Creating a test project DevForums post Implementing Your Own Crash Reporter DevForums post Share and Enjoy — Quinn “The Eskimo!” @ Developer Technical Support @ Apple let myEmail = "eskimo" + "1" + "@" + "apple.com"

Hi everyone, I'm experiencing crashes that consistently occur on iOS 18 devices, which seem to share a common root cause. I'm hoping for some guidance. Here are the details of the crashes as received from Xcode Organizer: Crash Trace 1: 0 CoreFoundation 0x0000000192c50e54 CF_IS_OBJC + 76 (CFRuntime.c:461) 1 CoreFoundation 0x0000000192c4dd3c CFRelease + 60 (CFRuntime.c:1202) 2 CoreFoundation 0x0000000192d015e0 _signalEventSync + 252 (CFStream.c:636) 3 CoreFoundation 0x0000000192d53050 ___signalEventQueue_block_invoke + 28 (CFStream.c:646) 4 libdispatch.dylib 0x000000019a93c370 _dispatch_call_block_and_release + 32 (init.c:1549) 5 libdispatch.dylib 0x000000019a93e0d0 _dispatch_client_callout + 20 (object.m:576) 6 libdispatch.dylib 0x000000019a9456d8 _dispatch_lane_serial_drain + 744 (queue.c:3934) 7 libdispatch.dylib 0x000000019a9461e0 _dispatch_lane_invoke + 380 (queue.c:4025) 8 libdispatch.dylib 0x000000019a951258 _dispatch_root_queue_drain_deferred_wlh + 288 (queue.c:7193) 9 libdispatch.dylib 0x000000019a950aa4 _dispatch_workloop_worker_thread + 540 (queue.c:6787) 10 libsystem_pthread.dylib 0x000000021a00fc7c _pthread_wqthread + 288 (pthread.c:2696) 11 libsystem_pthread.dylib 0x000000021a00c488 start_wqthread + 8 (:-1) Crash Trace 2: 0 libobjc.A.dylib 0x0000000186f33c20 objc_msgSend + 32 1 CoreFoundation 0x0000000189cb14b8 _inputStreamCallbackFunc + 36 (CFObject.m:1952) 2 CoreFoundation 0x0000000189cb0aa8 _signalEventSync + 216 (CFStream.c:626) 3 CoreFoundation 0x0000000189d01e30 ___signalEventQueue_block_invoke + 28 (CFStream.c:646) 4 libdispatch.dylib 0x0000000191948370 _dispatch_call_block_and_release + 32 (init.c:1549) 5 libdispatch.dylib 0x000000019194a0d0 _dispatch_client_callout + 20 (object.m:576) 6 libdispatch.dylib 0x00000001919516d8 _dispatch_lane_serial_drain + 744 (queue.c:3934) 7 libdispatch.dylib 0x00000001919521e0 _dispatch_lane_invoke + 380 (queue.c:4025) 8 libdispatch.dylib 0x000000019195d258 _dispatch_root_queue_drain_deferred_wlh + 288 (queue.c:7193) 9 libdispatch.dylib 0x000000019195caa4 _dispatch_workloop_worker_thread + 540 (queue.c:6787) 10 libsystem_pthread.dylib 0x000000021214bc7c _pthread_wqthread + 288 (pthread.c:2696) 11 libsystem_pthread.dylib 0x0000000212148488 start_wqthread + 8 Crash Trace 3: 0 libobjc.A.dylib 0x00000001941d9ce8 objc_loadWeakRetained + 156 (NSObject.mm:525) 1 CoreFoundation 0x0000000196d0a0f4 _outputStreamCallbackFunc + 36 (CFObject.m:1960) 2 CoreFoundation 0x0000000196d09724 _signalEventSync + 216 (CFStream.c:626) 3 CoreFoundation 0x0000000196d07948 ___signalEventQueue_block_invoke + 28 (CFStream.c:646) 4 libdispatch.dylib 0x000000019e9de248 _dispatch_call_block_and_release + 32 (init.c:1549) 5 libdispatch.dylib 0x000000019e9dffa8 _dispatch_client_callout + 20 (object.m:576) 6 libdispatch.dylib 0x000000019e9e75cc _dispatch_lane_serial_drain + 768 (queue.c:3934) 7 libdispatch.dylib 0x000000019e9e8124 _dispatch_lane_invoke + 380 (queue.c:4025) 8 libdispatch.dylib 0x000000019e9f338c _dispatch_root_queue_drain_deferred_wlh + 288 (queue.c:7193) 9 libdispatch.dylib 0x000000019e9f2bd8 _dispatch_workloop_worker_thread + 540 (queue.c:6787) 10 libsystem_pthread.dylib 0x00000002220f3680 _pthread_wqthread + 288 (pthread.c:2696) 11 libsystem_pthread.dylib 0x00000002220f1474 start_wqthread + 8 Notable Points: All crashes occur only on iOS 18 and newer versions. The crashes are independent of the Xcode version used to build the app (tested with both Xcode 15.4 and 16). All crash traces occur in CoreFoundation and seem to have nothing related to our app codebase. I've attempted to profile the app using Instruments to identify any zombie objects, but the crashes do not manifest on my own devices. I've referred to discussions, including this forum thread, but have not yet found a solution. Questions: Has anyone else encountered similar issues on iOS 18? Are there specific aspects of iOS 18 that might contribute to these CoreFoundation and libobjc-related crashes? Would appreciate any suggestions for further diagnostics or potential workarounds. Thank you for your help!

In our app we use CoreML. But ever since macOS 15.x was released we started to get a great bunch of crashes like this: Incident Identifier: 424041c3-884b-4e50-bb5a-429a83c3e1c8 CrashReporter Key: B914246B-1291-4D44-984D-EDF84B52310E Hardware Model: Mac14,12 Process: <REMOVED> [1509] Path: /Applications/<REMOVED> Identifier: com.<REMOVED> Version: <REMOVED> Code Type: arm64 Parent Process: launchd [1] Date/Time: 2024-11-13T13:23:06.999Z Launch Time: 2024-11-13T13:22:19Z OS Version: Mac OS X 15.1.0 (24B83) Report Version: 104 Exception Type: SIGABRT Exception Codes: #0 at 0x189042600 Crashed Thread: 36 Thread 36 Crashed: 0 libsystem_kernel.dylib 0x0000000189042600 __pthread_kill + 8 1 libsystem_c.dylib 0x0000000188f87908 abort + 124 2 libsystem_c.dylib 0x0000000188f86c1c __assert_rtn + 280 3 Metal 0x0000000193fdd870 MTLReportFailure.cold.1 + 44 4 Metal 0x0000000193fb9198 MTLReportFailure + 444 5 MetalPerformanceShadersGraph 0x0000000222f78c80 -[MPSGraphExecutable initWithMPSGraphPackageAtURL:compilationDescriptor:] + 296 6 Espresso 0x00000001a290ae3c E5RT::SharedResourceFactory::GetMPSGraphExecutable(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, NSDictionary*) + 932 . . . 43 CoreML 0x0000000192d263bc -[MLModelAsset modelWithConfiguration:error:] + 120 44 CoreML 0x0000000192da96d0 +[MLModel modelWithContentsOfURL:configuration:error:] + 176 45 <REMOVED> 0x000000010497b758 -[<REMOVED> <REMOVED>] (<REMOVED>) No similar crashes on macOS 12-14! MetalPerformanceShadersGraph.log Any clue what is causing this? Thanks! :)

Hello  A critical issue with the Apple Music app has been identified and consistently reported through Feedback Assistant, yet it remains unresolved. This exploit can reliably cause the app to crash under specific conditions, and each instance results in the device physically overheating, raising significant concerns regarding performance and hardware safety. The issue is reproducible every time, highlighting its severity and the potential impact on user experience and device functionality. Immediate attention from the development team would be greatly appreciated to address this matter. Contact us to see video: dontdelaydynamics.org Thank you!

Here is a modified code from the documentation example https://www.swift.org/documentation/server/guides/memory-leaks-and-usage.html#troubleshooting : class ViewController: UIViewController { var closure: () -> Void = { () } public func doNothing() {} public func doSomethingThatLeaks() { self.closure = { // This will leak as it'll create a permanent reference cycle: // // self -> self.closure -> self self.doNothing() } } override func viewDidLoad() { super.viewDidLoad() // Memory leak example: doSomethingThatLeaks() // Abandoned memory example: // NotificationCenter.default.addObserver(forName: .init("Abandoned"), object: nil, queue: nil) { _ in // print("\(self)") // } } deinit { print(#function, Self.self) } } If you place it, for example, in a navigation controller, do a push-pop several times, deinit will not be printed. But if you look in the Debug Memory Graph, it will not even show that there is a strong reference to this controller: Only if you manually select: You can see that it is held by the closure context, which it holds: This is definitely not abandoned memory (like the commented piece of the code example), but it is not shown either in the Debug Memory Graph or in Instruments Leaks. Why?

Hi guys, I've been this app for quite a while and I wanted to add audio to it but I've encountered a strange bug. Whenever I try to play the audio from the testing device, it prints out that the audio file cannot be found. I've checked multiple times the names and the code and I get no errors there whatsoever. I have no idea what might be causing this. Here's a part of the code: `import SwiftUI import AVFoundation struct Card: Identifiable { let id = UUID() let heading: String let description: String let imageName: String let detailDescription: String let sonification: String } struct ExplorepageUI: View { @State private var selectedCard: Card? @State private var showMore = false @State private var currentIndex = 0 @State private var currentCards: [Card] = [] let galaxies = [ Card(heading: "The Mice Galaxies", description: "They’re located about 300 million light-years away in the constellation Coma Berenices.", imageName: "TheMiceGalaxiesHubble", detailDescription:""" Their name refers to the long tails produced by tidal action, the relative difference between gravitational pulls on the near and far parts of each galaxy, known here as a galactic tide. It is a possibility that both galaxies, which are members of the Coma Cluster, have experienced collision, and will continue colliding until they coalesce. The colors of the galaxies are peculiar. In NGC 4676A a core with some dark markings is surrounded by a bluish white remnant of spiral arms. The tail is unusual, starting out blue and terminating in a more yellowish color, despite the fact that the beginning of each arm in virtually every spiral galaxy starts yellow and terminates in a bluish color. NGC 4676B has a yellowish core and two arcs; arm remnants underneath are bluish as well. The galaxies were photographed in 2002 by the Hubble Space Telescope. In the background of the Mice Galaxies, there are over 3000 galaxies, at distances up to 13 billion light-years. """, sonification: "SonificationoftheMiceGalaxies"), `class MusicPlayer: ObservableObject { private var audioPlayer: AVPlayer? func playSound(named sonificationFileName: String){ if let url = Bundle.main.url(forResource: sonificationFileName, withExtension: "mp3"){ print("✅ Found audio file at: \(url)") audioPlayer = try? AVPlayer(url: url) audioPlayer?.play() print("🎵 Audio should now be playing!") } else { print("❌ Audio file not found: \(sonificationFileName).mp3") } } func pause(){ audioPlayer?.pause() } }

This is only occurring on M4's. I am unable to determine the cause. Attached is an ips file, could someone investigate? Perry Scrypted Helper-2024-11-14-202729.ips

Have a rare crash in one of our framework which I am unable to figure out. Attaching the crash log here. Any idea how to debug this to find the root cause? Crash.crash

We have had the same video player in our app for at least 5 years with few issues but the iOS 18 updated has now resulted in video playback for our users who have downloaded the video for offline viewing is now played at 2x speed.

I have an old Objective-C app that has been running for several years. The last compilation was in February 2024. I just upgraded to Sequoia 15.1. The app has four subviews on its main view. When I run the app only the subview that was the last one instantiated is visible. I know the other subviews are there, because a random mouse click in one invisible view causes the expected change in the visible view. What changed in 15.1 to cause this?

Hello, I’m working with the RoomPlan API to capture and export 3D room models in an iOS app. My goal is to implement the RoomCaptureSessionDelegate protocol to handle the end of a room capture session. However, I’m encountering a cautionary warning in Xcode: Warning: "captureSession(:didEndWith:error:) nearly matches defaulted requirement captureSession(:didEndWith:error:) of protocol RoomCaptureSessionDelegate." I’ve verified that my delegate method signature matches the protocol, but the warning persists. I suspect this might be due to minor discrepancies in the parameter types or naming conventions required by the protocol. Below is my full RoomScanner.swift file: import RoomPlan import SwiftUI import UIKit func exportModelToFiles() { let exportURL = FileManager.default.temporaryDirectory.appendingPathComponent("RoomModel.usdz") let documentPicker = UIDocumentPickerViewController(forExporting: [exportURL]) documentPicker.modalPresentationStyle = .formSheet if let windowScene = UIApplication.shared.connectedScenes.first as? UIWindowScene, let rootViewController = windowScene.windows.first?.rootViewController { rootViewController.present(documentPicker, animated: true, completion: nil) } } class RoomScanner: ObservableObject { var roomCaptureSession: RoomCaptureSession? private let sessionConfig = RoomCaptureSession.Configuration() private var capturedRoom: CapturedRoom? func startSession() { roomCaptureSession = RoomCaptureSession() roomCaptureSession?.delegate = self roomCaptureSession?.run(configuration: sessionConfig) } func stopSession() { roomCaptureSession?.stop() guard let room = capturedRoom else { print("No room data available for export.") return } let exportURL = FileManager.default.temporaryDirectory.appendingPathComponent("RoomModel.usdz") do { try room.export(to: exportURL) print("3D floor plan exported to \(exportURL)") } catch { print("Error exporting room model: \(error)") } } } // MARK: - RoomCaptureSessionDelegate extension RoomScanner: RoomCaptureSessionDelegate { func captureSession(_ session: RoomCaptureSession, didUpdate room: CapturedRoom) { // Handle real-time updates if necessary } func captureSession(_ session: RoomCaptureSession, didEndWith capturedRoom: CapturedRoom, error: Error?) { if let error = error { print("Capture session ended with error: \(error.localizedDescription)") } else { self.capturedRoom = capturedRoom } } }

When I upgraded to Sequoia 15.1, an app that worked fine under OS 14 stopped working. Out of 4 views on the main screen, only 1 is visible. Yet, if I click where another view should be, I get the expected action so the views are there, just not visible. Only I can't see where I am clicking! I had to upgrade to Xcode 16 to recompile the app and run it in Debug mode. When I do, I get the following: NSBundle file:///System/Library/PrivateFrameworks/MetalTools.framework/ principal class is nil because all fallbacks have failed. Can't find or decode disabled use cases. applicationSupportsSecureRestorableState FWIW - the only view that actually shows up is the last subview added to the main view.

I have to guess which command queue is the one I want to debug in Xcode here: I have label set, but it doesn't seem to affect this part of Xcode.

Could someone help me with a good direction on where or how could I fix for this crash from console log: Not able to open storyboard or XIB. Once opening them, Xcode is crashing. tried uninstalling the Xcode, couldn't fix even after deleting derived data and caches. ------------------------------------- Translated Report (Full Report Below) ------------------------------------- Incident Identifier: 7E6D64FF-D4E9-4E3A-A37A-BC5016316DCD CrashReporter Key: 4776E37C-4D3D-F705-40D5-8A96EE95C89A Hardware Model: Mac15,6 Process: IBAgent-iOS [31688] Path: /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/Library/Xcode/Overlays/IBAgent-iOS Identifier: IBAgent-iOS Version: 16.0 (23506) Code Type: ARM-64 (Native) Role: Unspecified Parent Process: launchd_sim [31680] Coalition: com.apple.CoreSimulator.SimDevice.178E8D7E-176F-4B7F-8956-D26C5EF7323A [5165] Responsible Process: SimulatorTrampoline [1185] Date/Time: 2024-11-06 14:59:29.3079 +0530 Launch Time: 2024-11-06 14:59:28.9368 +0530 OS Version: macOS 15.1 (24B83) Release Type: User Report Version: 104 Exception Type: EXC_BREAKPOINT (SIGTRAP) Exception Codes: 0x0000000000000001, 0x0000000102e1e19c Termination Reason: SIGNAL 5 Trace/BPT trap: 5 Terminating Process: exc handler [31688] Triggered by Thread: 0 Application Specific Information: Abort Cause 259 Thread 0 Crashed:: Dispatch queue: com.apple.main-thread 0 libsystem_platform.dylib 0x102e1e19c _os_unfair_lock_recursive_abort + 36 1 libsystem_platform.dylib 0x102e19504 _os_unfair_lock_lock_slow + 304 2 libGSFont.dylib 0x19045ebb4 GSFontFileDescriptorForPath + 28 3 libFontParser.dylib 0x19047d714 TFileDescriptorContext::TFileDescriptorContext(char const*) + 216 4 libFontParser.dylib 0x19057c7e4 TFileDataReference::Map(char const*) + 36 5 libFontParser.dylib 0x19047d514 TFileDataReference::TFileDataReference(char const*) + 88 6 libFontParser.dylib 0x19057c934 TFileDataSurrogate::TFileDataSurrogate(char const*, timespec) + 152 7 libFontParser.dylib 0x1905cbaac TFont::CreateFontEntitiesForFile(char const*, timespec, bool, short, char const*) + 580 8 libFontParser.dylib 0x19047d1e0 FPFontCreateFontsWithPath + 200 9 CoreGraphics 0x18b612c54 create_private_data_array_with_path + 16 10 CoreGraphics 0x18b2cddd4 CGFontCreateFontsWithPath + 36 11 CoreGraphics 0x18b3389b0 CGFontCreateFontsWithURL + 680 12 libGSFont.dylib 0x190465518 AddFontsFromURLOrPath + 288 13 libGSFont.dylib 0x19045ffb4 RegisterURLAndCopyFaces + 168 14 libGSFont.dylib 0x19045fefc GSFontRegisterURL + 76 15 CoreText 0x181c5e0b8 _CTFontManagerRegisterActionFontsForURLs(__CFArray const*, CTFontManagerScope, bool, Action, __CFArray const**) + 396 16 IBCocoaTouchToolFoundation 0x10307e748 +[UIFont(IBCocoaTouchToolIntegration) ib_registerFontsAtURLs:] + 336 17 AssetCatalogFoundation 0x1033e1a88 __80-[IBMessageReceiveChannel deliverMessage:toTarget:withArguments:context:result:]_block_invoke + 196 18 AssetCatalogFoundation 0x1033e191c -[IBMessageReceiveChannel deliverMessage:toTarget:withArguments:context:result:] + 328 19 AssetCatalogFoundation 0x1033e14bc __88-[IBMessageReceiveChannel runBlockingReceiveLoopNotifyingQueue:notifyingTarget:context:]_block_invoke + 100 20 libdispatch.dylib 0x180178de0 _dispatch_client_callout + 16 21 libdispatch.dylib 0x180188bc8 _dispatch_async_and_wait_invoke + 112 22 libdispatch.dylib 0x180178de0 _dispatch_client_callout + 16 23 libdispatch.dylib 0x180187c60 _dispatch_main_queue_drain + 1272 24 libdispatch.dylib 0x180187758 _dispatch_main_queue_callback_4CF + 40 25 CoreFoundation 0x18041b2dc __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ + 12 26 CoreFoundation 0x180415838 __CFRunLoopRun + 1944 27 CoreFoundation 0x180414c24 CFRunLoopRunSpecific + 552 28 Foundation 0x180f319c8 -[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 208 29 AssetCatalogFoundation 0x1033bdc00 -[IBAbstractPlatformTool startServingReceiveChannel:] + 292 30 AssetCatalogFoundation 0x1033bddf4 -[IBAbstractPlatformTool startServingWriteDescriptor:readDescriptor:] + 96 31 AssetCatalogFoundation 0x1033be718 +[IBAbstractPlatformTool main] + 800 32 IBAgent-iOS 0x102b77930 main + 32 33 dyld_sim 0x102b89410 start_sim + 20 34 dyld 0x102c96274 start + 2840

Our app experience the strange crash,causing the app to not launch.This crash suddenly began to happen on October 25. At present, all the Hardware Model of mobile phones that occurred were on iPhone17,1 and the iOS system version was iOS18.0.1. This crash was all from users on the appstore, and was collected via Xcode - Organizer - &gt; Crashes. I've attached the crash report.Thanks Distributor ID: com.apple.AppStore Hardware Model: iPhone17,1 Process: XxxxxxXXX [31230] Path: /private/var/containers/Bundle/Application/6E9E07EA-B7A4-4D57-B419-743DDCF7C3A6/XxxxxxXXX.app/XxxxxxXXX Identifier: com.XxxxxxXXX.XxxxxxXXX Version: 8.1.10 (811001) AppStoreTools: 16A242d AppVariant: 1:iPhone17,1:18 Code Type: ARM-64 (Native) Role: unknown Parent Process: launchd [1] Coalition: com.XxxxxxXXX.XxxxxxXXX [8069] Date/Time: 2024-10-31 03:30:38.7437 +0800 Launch Time: 2024-10-31 03:30:38.7415 +0800 OS Version: iPhone OS 18.0.1 (22A3370) Release Type: User Baseband Version: 1.00.00 Report Version: 104 Exception Type: EXC_CRASH (SIGKILL) Exception Codes: 0x0000000000000000, 0x0000000000000000 Termination Reason: GUARD 5 Triggered by Thread: 0 Thread 0 Crashed: 0 dyld 0x00000001b2da32b0 lsl::PreallocatedAllocatorLayout&lt;278528ull&gt;::init(char const**, char const**, void*) + 436 (Allocator.h:537) 1 dyld 0x00000001b2d9ca38 start + 1960 (dyldMain.cpp:1289) Thread 0 crashed with ARM Thread State (64-bit): x0: 0x2010003030100000 x1: 0x0000000fffffc0d0 x2: 0x0000000000000002 x3: 0x00000001b2d717ab x4: 0x0000000000000000 x5: 0x0000000000000000 x6: 0x0000000000000000 x7: 0x0000000000000000 x8: 0x2010003030100000 x9: 0x2010003030100000 x10: 0x000000016d1dbdfb x11: 0x00000001b2dddf30 x12: 0x0000000000000050 x13: 0x0000000000000044 x14: 0x0000000000052010 x15: 0x0000000000000000 x16: 0x0000000000000000 x17: 0x0000000000000000 x18: 0x0000000000000000 x19: 0x000000018a7e0000 x20: 0x000000016d1dbb30 x21: 0x000000016d1dbad0 x22: 0x00000001f0794050 x23: 0x000000016d1db7b8 x24: 0x0000000fffffc10c x25: 0x0000000000000000 x26: 0x0000000000000000 x27: 0x0000000000000000 x28: 0x0000000000000000 fp: 0x000000016d1db850 lr: 0x00380001b2da3130 sp: 0x000000016d1db7b0 pc: 0x00000001b2da32b0 cpsr: 0x60000000 esr: 0x92000047 (Data Abort) byte write Translation fault Binary Images: 0x102c24000 - 0x1056d3fff main_executable_path_missing arm64 &lt;086a82c13b863f4485895baddc3144ba&gt; /main_executable_path_missing 0x1b2d69000 - 0x1b2dec693 dyld arm64e &lt;5db839882ee63756bd07b8d67b1133a5&gt; /usr/lib/dyld EOF 2024-10-26_17-41-58.4222_+0800-841f6bdf4b2d436606ce55595ffc94d64e9af744.crash 2024-10-26_19-44-40.1115_+0800-7d4d654c76a10108b431acc612d6063b1edb1c3e.crash 2024-10-27_17-12-02.4926_+0800-6a4b6ec4cff928cf746162b9371a3176c3667c21.crash 2024-10-28_21-42-02.6780_+0800-c66c71c13414e7ff14ba783c883730c1361523b5.crash 2024-10-29_05-47-00.3943_+0800-ac7c1f5b6caf9aa97d71744a8f980c32d47eab80.crash 2024-10-31_03-30-38.7437_+0800-e1c54dc8879f97932cbb1520a04210bea6d7aaf4.crash 2024-11-03_07-57-18.8892_+0800-c7704569afc79ce50ac10b66e185de87425b1969.crash 2024-11-03_08-27-19.0514_+0800-c069e2f8dfa6767b8e301513aff3c3a7ea331e2c.crash

I encountered a crash in iOS 17 related to CLBackgroundActivitySession, which appears to be due to misleading guidance in an Apple’s WWDC video. Crash sample code: https://github.com/steve-ham/AppleLocationCrash Simplified Reproduction Steps: 1. Open the GitHub sample app. 2. Archive and export (Distribute App -> Custom -> (Release Testing, Enterprise, or Debugging) -> Export). 3. Open the app. 4. Tap enableBackgroundLocation -> select Allow While Using App on the system popup. 5. Tap disableBackgroundLocation. 6. Go to the iOS home screen. 7. Wait for 10 seconds. 8. Reopen the app -> crash occurs. The crash happens because setting CLBackgroundActivitySession to nil does not end the session, despite Apple’s guidance suggesting it should. Below is the exact quote from WWDC 2023, which explicitly states that both calling invalidate() or letting the object get destroyed (i.e., setting to nil) would end the session: WWDC 2023 Discover Streamlined Location Updates (https://developer.apple.com/videos/play/wwdc2023/10180/) “Before starting the updates, you should instantiate a CLBackgroundActivitySession object to start a new session. Note, we are assigning the session to self.backgroundActivity, which is a property and not to a local variable. And this is important because if we used a local variable, then when it goes out of scope, the object it holds would be deallocated, invalidating the session and potentially ending your app’s access to location. Then when we want to end our session, we can do that by sending the invalidate message or by letting the object be destroyed.” I’ve submitted this to Apple for resolution but wanted to share this with the community. This misguidance has caused issues in my app’s release. If Apple could reply to confirm or provide clarification, it would be greatly appreciated. P.S. Even a minimal implementation in viewDidLoad triggers the crash: let session = CLBackgroundActivitySession() print("session (session)")

The app exits immediately on startup, there is no crash message, and I can't get any valuable diagnostic information. It doesn't even get to the main function. It feels like exit is being called somewhere, and then I used atexit to register the relevant handler. Finally, I found the following stack printout It looks like it's a dynamic linking issue, so what's the best way to troubleshoot it. This problem only occurs in release versions.

I'm trying to add an iMessage extension to my app, and upon adding the iMessage App Icon set, I ran into an issue with one specific icon size: 1024x768px, aka 1x 1024x768pt. When I remove this one icon from the icon set, it compiles and runs fine, however I can't push it to the App Store as I get the error: "Asset validation failed. Missing Image Asset. Your app is missing the Large App Icon asset 'AppIcon' in 'Payload/Runner.app/PlugIns/MessagesExtension.appex'." I'm assuming this refers to 1024x768px, as this size placeholder appears upon adding a New Messages Extension Icon to my assets folder, and 1024x1024 is already included and compiles fine with it. However, when I add the 1024x768 icon, and try to run the app, I get the error: "Command CompileAssetCatalog failed with a nonzero exit code" The app icon's filename is correct, it is exactly 1024x768 px, and my contents.json correctly includes : { "filename" : "AppIcon_1024x768.png", "idiom" : "ios-marketing", "platform" : "ios", "scale" : "1x", "size" : "1024x768" } as is the same format for all of my other icons that work. Why am I running into this issue upon inclusion of this one required size? How do I fix it?

I have a macOS application built via command line (xcodebuild) using Xcode 16.1. Developed on ARM but end user is on Intel (same macOS 15.1). App crashed and they sent me a .IPS dump. From what MacGPT tells me: Reading an IPS (Incident Processing System) file from a macOS crash report in Xcode isn’t as straightforward as with iOS device logs. I can open the dump using Console. I see the IPS dump is partially symbolicated. Line in the dump says: Meteorologist 0x103e0348f 0x103d88000 + 504975 Referencing this article: Adding identifiable symbol names to a crash report | Apple Developer Documentation I run this command and see the same UUID for x86_64 as in the dump. dwarfdump --uuid /Users/ed/meteorologist/trunk/Build/Meteorologist.xcarchive/dSYMs/Meteorologist.app.dSYM/Contents/Resources/DWARF/Meteorologist I run this command: atos -arch x86_64 -o /Users/ed/meteorologist/trunk/Build/Meteorologist.xcarchive/dSYMs/Meteorologist.app.dSYM/Contents/Resources/DWARF/Meteorologist -l 0x103d88000 0x103e0348f And it says: fg: no current job Suggestions for what I’m missing?

I have facing an above crash for many users device running on iOS 17.6.1 mostly on iPad devices. I'm not sure why this happening only in 17.X. In Xcode Organizer unable to see this crash in any devices running on OS 18.x. Our app crashes got spiked due to this. I am unable to fix or reproduce the same. The crash log is not pointing to our app code to find the root cause and fix this issue. Have attached the crash log in this post also the crash log roles have mixed values Background &amp;amp; Foreground. But most of the crash is in background. Is this any crash related to system and that only solved by OS update? I have updated the app using Xcode 16 and 16.1 still facing this crash unable to symbolicate the crash report as well. Any ideas/solution how to solve this or how to proceed further. Have attached the entire crash log below. RoleBackgroundCrash.crash RoleForeGroundCrash.crash

I've an app running for some time in the Appstore now. Recently I had to renew my singing certficicates to be able to publish my app again. I renewed the certificates, updated my provisioning profile and signed a new app version to publish only to find out that the app crashes during the splash screen. I added new features to the app so my first thought was that there would be an issue there. To test that, I built the latest stable version of the app and signed it with the new profivisioning profile. The result was exactly the same crash as the new build. My assumption is that the crash is caused by bad signing (?) but I am not sure because I'm lacking experience on that front. I do have a crash report from testflight and logs from the device where the app crashed. Testflight crash: TestFlight crashlog Device error logs: Device error logs Hope someone can help my out because I'm at a dead end :(