Debugging

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[Xcode Instruments][Allocations] Chart not showing any data
Hi there, In a project that I am working on, whenever I try running instruments for allocations to see the memory allocations that are happening under the hood, I see the statistics, and the traces updating, however the chart never updates. I have made new projects on the machine, and I have tried different Xcode versions, and they all show the chart just fine. I have tried running the project on other machines with no success. I have double checked the arguments and options on the active schema I am trying to profile with the schema of a new project and they are identical. Here is a picture of how it looks: My questions are as follows: What properties and settings can disable the chart from showing up? What diagnostic steps recommended that I should take? I can not share a reproducible as this is the only project I have with this problem and it is not mine, but please tell me if there is anything else I can provide in order to debug this. All the best Parsa
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241
Sep ’24
MPMediaItemPropertyArtwork crashes on Swift 6
Hey all! in my personal quest to make future proof apps moving to Swift 6, one of my app has a problem when setting an artwork image in MPNowPlayingInfoCenter Here's what I'm using to set the metadata func setMetadata(title: String? = nil, artist: String? = nil, artwork: String? = nil) async throws { let defaultArtwork = UIImage(named: "logo")! var nowPlayingInfo = [ MPMediaItemPropertyTitle: title ?? "***", MPMediaItemPropertyArtist: artist ?? "***", MPMediaItemPropertyArtwork: MPMediaItemArtwork(boundsSize: defaultArtwork.size) { _ in defaultArtwork } ] as [String: Any] if let artwork = artwork { guard let url = URL(string: artwork) else { return } let (data, response) = try await URLSession.shared.data(from: url) guard (response as? HTTPURLResponse)?.statusCode == 200 else { return } guard let image = UIImage(data: data) else { return } nowPlayingInfo[MPMediaItemPropertyArtwork] = MPMediaItemArtwork(boundsSize: image.size) { _ in image } } MPNowPlayingInfoCenter.default().nowPlayingInfo = nowPlayingInfo } the app crashes when hitting MPMediaItemPropertyArtwork: MPMediaItemArtwork(boundsSize: defaultArtwork.size) { _ in defaultArtwork } or nowPlayingInfo[MPMediaItemPropertyArtwork] = MPMediaItemArtwork(boundsSize: image.size) { _ in image } commenting out these two make the app work again. Again, no clue on why. Thanks in advance
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494
Oct ’24
watchOS app crashing on Series 10 - cannot reproduce on Series 8 running same watchOS version
I'm receiving reports from users that my app is crashing immediately after being opened on the Apple Watch Series 10 using watchOS 11. I've updated my personal Apple Watch Series 8 to watchOS 11 and I'm unable to reproduce this crash using the same release build from the App Store. The version currently on the App Store was built using Xcode 15.4 (22622). I'm preparing an update that is built using Xcode 16.0 (23051) and have asked one of the users reporting the crash to try a TestFlight build built using Xcode 16.0 and they are no longer experiencing this crash. As far as I can tell, the only difference between the version on the App Store and the TestFlight build is that it is built with the watchOS 11 SDK included with Xcode 16.0. I don't think any of my app's dependencies (all managed by Swift Package Manager) have been updated in the TestFlight build. I'm attaching a crash report submitted by one of the users. I believe this is a partially symbolicated crash report and have tried opening it in Xcode in an attempt to make it fully symbolicated without success. I've also received a video recording of the app crashing. I'm also not able to see any crashes occurring with an Apple Watch Series 10 in the Xcode Organizer, which leads me to believe this crash may be occurring at the Springboard level. Any help to further diagnose this issue would be much appreciated.
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551
Oct ’24
Unable to deploy the app on iPhone
When installing the application on my iPhone, connected using USB cable, i am facing the following issue: ERROR: The application failed to launch. (com.apple.dt.CoreDeviceError error 10002 (0x2712)) NSLocalizedRecoverySuggestion = Provide a valid bundle identifier. NSLocalizedFailureReason = The requested application VALID_BUNDLE_IDENTIFIER is not installed. BundleIdentifier = VALID_BUNDLE_IDENTIFIER ---------------------------------------- The operation couldn?t be completed. (OSStatus error -10814.) (NSOSStatusErrorDomain error -10814 (0xFFFFD5C2)) _LSFunction = runEvaluator _LSLine = 1734 10:02:16 Acquired tunnel connection to device. 10:02:16 Enabling developer disk image services. 10:02:17 Acquired usage assertion. error MT1045: Failed to execute 'devicectl': 'devicectl -j /var/folders/vq/cdyy2xmd7g9cly1gh_hzvsj00000gn/T/tmp93djQj.tmp device process launch --terminate-existing --device "User’s iPhone" VALID_BUNDLE_IDENTIFIER --monodevelop-port 10000 --connection-mode usb' returned the exit code 1 Xcode version used: 15.4 IDE used to deploy the app: Visual Studio for MAC
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401
Sep ’24
Code signature not valid when running on Simulator in Xcode 16
I just upgraded to Version 16.0 (16A242d) and unfortunately the App that used to run perfectly fine on Xcode 15 is now broken. It crashes right after showing the Launch Screen on the Simulator. Here's the formatted error message in the Console: dyld[80159]: Library not loaded: @rpath/AppName-iOS.debug.dylib Referenced from: <App ID> /path/to/AppName-iOS.app/AppName-iOS Reason: tried: '/path/to/DerivedData/AppName-iOS.debug.dylib' (no such file), '/path/to/CoreSimulator/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot/usr/lib/system/introspection/AppName-iOS.debug.dylib' (no such file), '/path/to/AppName-iOS.app/AppName-iOS.debug.dylib' (code signature not valid for use in process: Trying to load an unsigned library), '/path/to/DerivedData/PackageFrameworks/AppName-iOS.debug.dylib' (no such file), '/path/to/AppName-iOS.app/Frameworks/AppName-iOS.debug.dylib' (no such file), '/path/to/CoreSimulator/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot/usr/lib/AppName-iOS.debug.dylib' (no such file) For some reason the Library is unsigned and I've checked all the settings with no luck.
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691
Oct ’24
.searchable bug with new navigationTransitions
When using the new .navigationTransition feature, when using .searchable at the same time result in the search bar disappearing when dismissing the view you've trasition to, has anyone else experienced this or found any workarounds? Here is an example that make the issue always occur. @State private var searchText: String = "" @Namespace private var namespace let things: [String] = ["one", "two", "three", "four", "five", "six", "seven", "eight", "nine", "ten", "eleven", "twelve", "thirdteen", "fourteen", "fifteen", "sixteen", "seventeen", "eighteen", "nineteen", "twenty"] var body: some View { NavigationStack { ScrollView { LazyVStack(spacing: 20) { ForEach(things, id: \.self) { thing in NavigationLink(){ SwiftUIView(thing: thing, name: namespace) }label: { Text(thing) } .matchedTransitionSource(id: thing, in: namespace) } } } .searchable(text: $searchText) .navigationTitle("My List") .navigationBarTitleDisplayMode(.inline) } } } struct SwiftUIView: View { var thing: String var name: Namespace.ID var body: some View { Text(thing) .navigationTransition(.zoom(sourceID: thing, in: name)) } } After running the code you end up with this: And after clicking an element and dismissing it your get this:
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201
Sep ’24
EXC_GUARD crash on iOS 18 [Expo 51 SDK]
Hello, I'm experiencing a persistent crash in my Expo app on iOS 17.4.1 and subsequently 18.0 (on the iPhone 12 mini) triggered by an EXC_GUARD error. I've also received the following warning in the XCode build logs: /Users/expo/workingdir/build/ios/Pods/sqlite3/sqlite-src-3450300/sqlite3.c:60562:24: warning: implicit conversion loses integer precision: 'i64' (aka 'long long') to 'u32' (aka 'unsigned int') [-Wshorten-64-to-32] The device crash logs are attached below. I'll be looking around for any other fixes, but grateful for your help in the meantime! ExcUserFault_pppppp-2024-09-18-203642.txt ExcUserFault_TestFlight-2024-09-21-230842.000.txt
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933
Sep ’24
onGeometryChange: Assertion failed: Block was expected to execute on queue
Hello! After upgrading to Xcode 16 & Swift 6 & iOS 18 I starting receiveing strange crashes. Happens randomly in different view and pointing to onGeometryChange action block. I added DispatchQueue.main.async { in hopes it will help but it didn't. HStack { ... } .onGeometryChange(for: CGSize.self, of: \.size) { value in DispatchQueue.main.async { self.width = value.width self.height = value.height } } As far as I understand, onGeometryChange is defined as nonisolated and Swift 6 enforce thread checking for the closures, SwiftUI views are always run on the main thread. Does it mean we can not use onGeometryChange safely in swiftui? BUG IN CLIENT OF LIBDISPATCH: Assertion failed: Block was expected to execute on queue [com.apple.main-thread (0x1eacdce40)] Crashed: com.apple.SwiftUI.AsyncRenderer 0 libdispatch.dylib 0x64d8 _dispatch_assert_queue_fail + 120 1 libdispatch.dylib 0x6460 _dispatch_assert_queue_fail + 194 2 libswift_Concurrency.dylib 0x62b58 <redacted> + 284 3 Grit 0x3a57cc specialized implicit closure #1 in closure #1 in PurchaseModalOld.body.getter + 4377696204 (<compiler-generated>:4377696204) 4 SwiftUI 0x5841e0 <redacted> + 60 5 SwiftUI 0x5837f8 <redacted> + 20 6 SwiftUI 0x586b5c <redacted> + 84 7 SwiftUICore 0x68846c <redacted> + 48 8 SwiftUICore 0x686dd4 <redacted> + 16 9 SwiftUICore 0x6ecc74 <redacted> + 160 10 SwiftUICore 0x686224 <redacted> + 872 11 SwiftUICore 0x685e24 $s14AttributeGraph12StatefulRuleP7SwiftUIE15withObservation2doqd__qd__yKXE_tKlF + 72 12 SwiftUI 0x95450 <redacted> + 1392 13 SwiftUI 0x7e438 <redacted> + 32 14 AttributeGraph 0x952c AG::Graph::UpdateStack::update() + 540 15 AttributeGraph 0x90f0 AG::Graph::update_attribute(AG::data::ptr<AG::Node>, unsigned int) + 424 16 AttributeGraph 0x8cc4 AG::Subgraph::update(unsigned int) + 848 17 SwiftUICore 0x9eda58 <redacted> + 348 18 SwiftUICore 0x9edf70 <redacted> + 36 19 AttributeGraph 0x148c0 AGGraphWithMainThreadHandler + 60 20 SwiftUICore 0x9e7834 $s7SwiftUI9ViewGraphC18updateOutputsAsync2atAA11DisplayListV4list_AG7VersionV7versiontSgAA4TimeV_tF + 560 21 SwiftUICore 0x9e0fc0 $s7SwiftUI16ViewRendererHostPAAE11renderAsync8interval15targetTimestampAA4TimeVSgSd_AItF + 524 22 SwiftUI 0xecfdfc <redacted> + 220 23 SwiftUI 0x55c84 <redacted> + 312 24 SwiftUI 0x55b20 <redacted> + 60 25 QuartzCore 0xc7078 <redacted> + 48 26 QuartzCore 0xc52b4 <redacted> + 884 27 QuartzCore 0xc5cb4 <redacted> + 456 28 CoreFoundation 0x555dc <redacted> + 176 29 CoreFoundation 0x55518 <redacted> + 60 30 CoreFoundation 0x55438 <redacted> + 524 31 CoreFoundation 0x54284 <redacted> + 2248 32 CoreFoundation 0x535b8 CFRunLoopRunSpecific + 572 33 Foundation 0xb6f00 <redacted> + 212 34 Foundation 0xb6dd4 <redacted> + 64 35 SwiftUI 0x38bc80 <redacted> + 792 36 SwiftUI 0x1395d0 <redacted> + 72 37 Foundation 0xc8058 <redacted> + 724 38 libsystem_pthread.dylib 0x637c _pthread_start + 136 39 libsystem_pthread.dylib 0x1494 thread_start + 8
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How to (re)symbolicate crashlog in Xcode 16.0?
I got a crashlog of my iPad App from a user and now I have to find out where in the app the problem lies. I use Xcode Version 16.0 (16A242d) and then follow these steps: Attach an iPad Xcode -> Window ->Devices and Simulators Open Recent Logs Navigate to the .ips file Open it Result: I can see that the app exceeds the wall-clock allowance All calls of my app are not symbolicated. Question: How can I get Xcode to symbolicate the crashlog properly?
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283
Sep ’24
Unable to Vertify App/ Preview only on iPhone
Choose the real iPhone device on my Xcode and build for running. Xcode warn me to vertify the Developer App certification in VPN & Device Management. When I get through it as vertify. The setting page still ask me to vertify the app. I press the "Vertify App" Button and press "Vertify" but it can't work. And it also cannot preview when I choose my device in the previewer. But both work well on my iPad Air. I can pass the vertify app and also can preview through Xcode. I searched the problem in forum.i found someone who has the same problem. https://developer.apple.com/forums/thread/744579 I try to change my network environment, reboot the device, reboot the develop laptop, but still cannot work. I'm using Xcode Version 16.0 (16A242d) iPhone 14 Pro with iOS 18.0 (22A3354) iPad Air 3 with iPad OS 17.6.1
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178
Sep ’24
ios 18 Crash
My project use manual reference counting and crash with UIAlertController when touch to Action Button: UIAlertController alert = [[UIAlertController alertControllerWithTitle:@"fsđs" message:@"fsđs" preferredStyle:UIAlertControllerStyleAlert ]autorelease]; UIAlertAction actionOk = [UIAlertAction actionWithTitle:@"Ok" style:UIAlertActionStyleDefault handler:nil]; [alert addAction:actionOk]; [self.window.rootViewController presentViewController:alert animated:YES completion:^{ }];
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461
Oct ’24
Turning off WiFi on iPhone breaks connection to Xcode debugger
I have a bug in my app that happens when the app is "offline" without and internet connection. The app should still work as it stores content locally. However I am struggling to debug the issue because turning off WiFi breaks the connection to the Xcode debugger, even though it is plugged in via USB. Did I turn on some setting to debug over WiFi? How do I debug over USB so I can see the log output without a network connection to the iPhone?
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268
Sep ’24
iPad does not work while debugging app with Automatic Assessment Configuration
I'm debugging ios app using Automatic Assessment configuration entitlement with ipad. However, while repeatedly running and stopping the app, it crashed during the assessment mode, and now the ipad doesn't work. Because it might be under the assessment mode, I cannot return to the home screen and cannot uninstall the app. Additionally, even when I try to redo the debugging process, it remains stuck on the "installing" stage in xcode, and my iPad is unresponsive. I am unable to force quit it. Is there a way to recover my iPad?
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190
Sep ’24
MFMessageComposeViewController, SwiftUI, with attachment
My app needs to send iMessages with an attached data file. The view comes up modally and the user needs to press the send button. When the button is tapped the error occurs and the attachment and message is not delivered. I have tried three implementations of UIViewControllerRepresentable for MFMessageComposeViewController that have worked for iOS 15 and 16, but not 17. If I make the simplest app to show the problem, it will reliably fail on all iOS versions tested. If I remove the attachment, the message gets sent. In contrast, the equivalent UIViewControllerRepresentable for email works perfectly every time. After struggling for weeks to get it to work, I am beginning to believe this is a timing error in iOS. I have even tried unsuccessfully to include dispatch queue delays. Has anybody else written a swiftUI based app that can reliably attach a file to an iMessage send? UIViewControllerRepresentable: import SwiftUI import MessageUI import UniformTypeIdentifiers struct AttachmentData: Codable { var data:Data var mimeType:UTType var fileName:String } struct MessageView: UIViewControllerRepresentable { @Environment(\.presentationMode) var presentation @Binding var recipients:[String] @Binding var body: String @Binding var attachments:[AttachmentData] @Binding var result: Result<MessageComposeResult, Error>? func makeUIViewController(context: Context) -> MFMessageComposeViewController { let vc = MFMessageComposeViewController() print("canSendAttachments = \(MFMessageComposeViewController.canSendAttachments())") vc.recipients = recipients vc.body = body vc.messageComposeDelegate = context.coordinator for attachment in attachments { vc.addAttachmentData(attachment.data, typeIdentifier: attachment.mimeType.identifier, filename: attachment.fileName) } return vc } func updateUIViewController(_ uiViewController: MFMessageComposeViewController, context: Context) { } func makeCoordinator() -> Coordinator { return Coordinator(presentation: presentation, result: $result) } class Coordinator: NSObject, MFMessageComposeViewControllerDelegate { @Binding var presentation: PresentationMode @Binding var result: Result<MessageComposeResult, Error>? init(presentation: Binding<PresentationMode>, result: Binding<Result<MessageComposeResult, Error>?>) { _presentation = presentation _result = result } func messageComposeViewController(_ controller: MFMessageComposeViewController, didFinishWith result: MessageComposeResult) { defer { $presentation.wrappedValue.dismiss() } switch result { case .cancelled: print("Message cancelled") self.result = .success(result) case .sent: print("Message sent") self.result = .success(result) case .failed: print("Failed to send") self.result = .success(result) @unknown default: fatalError() } } } } SwiftUI interface: import SwiftUI import MessageUI struct ContentView: View { @State private var isShowingMessages = false @State private var recipients = ["4085551212"] @State private var message = "Hello from California" @State private var attachment = [AttachmentData(data: Data("it is not zip format, however iMessage won't allow the recipient to open it if extension is not a well-known extension, like .zip".utf8), mimeType: .zip, fileName: "test1.zip")] @State var result: Result<MessageComposeResult, Error>? = nil var body: some View { VStack { Button { isShowingMessages.toggle() } label: { Text("Show Messages") } .sheet(isPresented: $isShowingMessages) { MessageView(recipients: $recipients, body: $message, attachments: $attachment, result: $result) } .onChange(of: isShowingMessages) { newValue in if !isShowingMessages { switch result { case .success(let type): switch type { case .cancelled: print("canceled") break case .sent: print("sent") default: break } default: break } } } } } } #Preview { ContentView() }
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359
Sep ’24
Debug with Xcode while connecting a usb device to iPad Pro
Hi We are developing a iPad accessory that connects to the USB-C port of an iPad Pro. For debugging, we are using iPad pro M4 and iPad Pro 12.9 (fifth gen). We are aware we can debug the app over wifi, but this process is slow and cumbersome. Is there a USB-C hub ( I guess that supports thunderbolt ) that would allow us to connect the iPad to both our Mac and to the iPad accessory simultaneously ? Thanks
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287
Sep ’24
JavaScriptCore Crashed in iOS17 and above system
After the release of iOS17, our app has collected JavaScriptCore crashes, and the crash has recently appeared in iOS17 and above. The number of crashes collected recently is increasing. The following are several complete crash log information. Currently, crashes are only collected on iOS17 and above systems. 2024-05-08_20-45-00.5216_+0800-fdb980f66f56d73b944ccc3466922d7fd0690089.crash 2024-05-11_02-42-46.0303_+0800-5ea1f23ba38c4782b80bd6304a9625e305c296a2.crash 2024-05-13_14-30-03.2084_+0800-d9598b08a153f5214b51257400423d4079049578.crash
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2w
xctrace Recording Failure
Translate the complete passage into English: "When using xctrace to record mobile process performance parameters, it happens that long duration recordings (exceeding about 20 minutes) result in the trace file missing some information, as shown in the diagram. However, there is no issue when recording directly with the instrument on the problematic machine. Now, using xctrace for recording for over 20 minutes almost certainly causes this problem. The macOS versions are all 12.5.1, and the processors are M1 and Intel Core i7, respectively. Additionally, the Xcode versions are all 13.4 (13F17a). There is no problem with short recording durations. Only when it records for a longer period does it result in nearly all data being lost. The situation is pretty much the same with the other templates as well.
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318
Sep ’24
modulemap for a framework that uses another framework's interface in its interface
I have an app that uses FrameworkA and FrameworkB. FrameworkA is simple, i.e., no dependencies. FrameworkB includes FrameworkA, which is normal. But it also uses pieces of FrameworkA's public interface in its own public interface. Yes, I find that a bit odd... (I didn't make those frameworks... just trying to sort out things...) Now I am trying to enable Xcode's module verifier for FrameworkB and the problem begins... FrameworkB can no longer have #import &lt;FrameworkA/FramworkASomethingSomething.h&gt; in its public headers. The modulemap file for FrameworkB currently looks like framework module FrameworkB { umbrella header "FrameworkB.h" export * module * { export * } } Is it possible still use FrameworkA's public interface in FrameworkB's public interface? And if yes, how is that sorted out in the modulemap? So far I have tried framework module FrameworkB { umbrella header "FrameworkB.h" export * module * { export * } link framework "FrameworkA" module FrameworkA [system] { umbrella header "FrameworkA.h" export * } } But it gives the error Umbrella header 'FrameworkA.h' not found Thanks!
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265
Sep ’24
Debugger messages not showing
I've downloaded xcode beta and from then I'm not able to see any messages in the debugger console. I only see the: "Message from debugger: killed" after stopping it. I tried downgrading it but since I'm using Sequoia Beta, "normal" xcode won't be compatible with this MacOs version. This is what I have: xcode Version 16.1 beta (16B5001e) Apple Swift version 5.10 (swiftlang-5.10.0.13 clang-1500.3.9.4) Target: x86_64-apple-darwin24.0.0 lldb-1500.0.404.7 Apple Swift version 5.10 (swiftlang-5.10.0.13 clang-1500.3.9.4) xcode-select version 2409. package-id: com.apple.pkg.CLTools_Executables version: 15.3.0.0.1.1708646388 volume: / location: / install-time: 1725364937 It can be a mess as I tried so many ways to make this work. Thanks in advance. Regards.
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336
Sep ’24