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LLDB crash

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WKWebView LoadRequest crash on ios 26
Since the ios 26 beta our app is crashing when calling LoadRequest() on the wkwebview class. The app crashes out completely when it occurs even in the debugger, I was able to get a stack trace from our Sentry crash handler. See below It seems that calling LoadRequest from the mainthread fixes the issue but I don't understand why, theres no documentation to suggest this must be done. Any ideas? Below is the stack trace I got from Sentry: WebKit +0x0054e00 WebKit::allDataStores WebKit +0x0bf34f4 WebKit::NetworkProcessProxy::preconnectTo WebKit +0x0acef64 WebKit::WebPageProxy::preconnectTo WebKit +0x0b0d92c ***::Detail::CallableWrapper::call WebKit +0x0ab6cf8 WebKit::WebPageProxy::maybeInitializeSandboxExtensionHandle WebKit +0x0ab84dc WebKit::WebPageProxy::loadRequestWithNavigationShared WebKit +0x0ab7adc WebKit::WebPageProxy::loadRequest WebKit +0x05d0704 -[WKWebView loadRequest:] Grid3iOS +0x5240944 xamarin_dyn_objc_msgSendSuper In App Grid3iOS +0x187dec4 wrapper_managed_to_native_O
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Reply to iBeacon Region Monitoring Issue When App is Terminated
What could be causing our app to fail detecting iBeacon regions when terminated, while third-party apps work correctly? I don't know specifically, but I suspect there is an issue with how your app handles being launched into the background. The typical pattern here is that the system did launch the app into the background, but then the app either crashed or never actually registered with CoreLocation, so it never received the message notifying it that it's beacon was discovered. The other possibility is that there is an issue with your beacon itself. Why does our iBeacon detection start working only after another iBeacon app triggers? I don't know, but my guess is that there's something more complicated going on and the 3rd party app is only an indirect factor. Are there specific implementation requirements or best practices for reliable background iBeacon monitoring? The main one is that your app needs to be able to fully launch in the background. Could this be related to iOS background app refresh
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SwiftData crash when switching between Window and ImmersiveSpace in visionOS
Environment visionOS 26 Xcode 26 Issue I am experiencing crash when trying to access a [String] from a @Model data, after dismissing an immersiveSpace and opening a WindowGroup. This crash only occurs when trying to access the [String] property of my Model. It works fine with other properties. Thread 1: Fatal error: This backing data was detached from a context without resolving attribute faults: PersistentIdentifier(...) Steps to Reproduce Open WindowGroup Dismiss window, open ImmersiveSpace Dismiss ImmersiveSpace, reopen WindowGroup Any guidance would be appreciated! @main struct MyApp: App { var body: some Scene { WindowGroup(id: main) { ContentView() } .modelContainer(for: [Item.self]) ImmersiveSpace(id: immersive) { ImmersiveView() } } } // In SwiftData model @Model class Item { var title: String = // Accessing this property works fine var tags: [String] = [] @storageRestrictions(accesses: _$backingData, initializes: _tags) init(initialValue) { _$backingData.setValue(forKey: . tags, to
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Reply to [iOS 26][SDK 26] Application never received providerDidBegin(_:) delegate
Observed a few times that providerDidBegin(_:) delegate never called for the complete app session after app init(as part of this CXProvider registered) which was built with SDK 26 and running on iOS 26. Yes, it looks like there is a bug there. More specifically, calling CXProvider.init(configuration:) kicks off an XPC connection to callservicesd on a secondary thread, the end of which eventually calls providerDidBegin(_:). If that completes before you're able to call setDelegate, then you'll see the problem you're describing. Oddly, as far as I can tell, the issue has basically been present from the beginning, so I'm not sure why I haven't heard of this before. Are you creating CXProvider on a background thread? I generally recommend using the main thread for CallKit and PushKit, and it's possible that initializing them on a background thread might make this problem more likely due to differences in thread priority. Moving to here: This issue was observed multiple times with our testing. Since there is no pro
Topic: App & System Services SubTopic: General Tags:
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Reply to SwiftData Fatal error: Editors must register their identifiers before invoking operations on this store
@DTS Engineer thank you for these suggestions. I've added the full crash report from Crashlytics to this post. After enabling the launch argument you suggested, I managed to reproduce the crash in the debugger once, so that's some progress. After enabling Swift 6 and complete concurrency checking, I got some build errors in the class owning the ModelActor. Wherever I accessed the ModelActor, I got this error: Sending 'self.localStorage.some' risks causing data races. As mentioned in my original post, the ModelActor conforms to a protocol because I am using another type of storage in iOS 16 which doesn't support SwiftData. This protocol didn't require that conforming types were Actors, leading me to suspect that the class owning the ModelActor didn't treat it as an actor, because it only know about the protocol. Adding the Actor requirement to the protocol, removed the build errors in the owning class. Now, I have to ship this change to confirm that it actually fixes it, since I cannot reliab
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Reply to SwiftData Fatal error: Editors must register their identifiers before invoking operations on this store
Do you have a full symbolicated crash report to share? You can include crash reports directly in your post using the forums attachment feature. For any random crash related to SwiftData / Core Data, I'd suggest that you add com.apple.CoreData.ConcurrencyDebug 1 as a launch argument of the app to check if there is any violation, as discussed here. Also, I guess ConsumptionSession is Sendable? Otherwise, Xcode will give you an error if you compile with Swift 6. If you haven't used Swift 6, I'd suggest that you give it a try to see if that unveils any race condition. Best, —— Ziqiao Chen  Worldwide Developer Relations.
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Reply to iOS26 wkWebview Crash Application threw exception CALayerInvalidGeometry: CALayer position contains NaN:
I had the same crash with same crashlog. In my case I used WKWebView to display PDF document. Crash used to occur when you long press to call actions menu anywhere in the area without text. If you long press on text, actions menu was displayed without crash. It was on iOS 26 beta 5, but now on iOS 26 beta 7 I can't reproduce crash in such scenario. Looks like it was fixed, but can't say for sure, since I didn't find mentions of such problem in release notes.
Topic: Safari & Web SubTopic: General
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Reply to iOS 18 CoreFoundation crash in __CFRunLoopServiceMachPort (EXC_BREAKPOINT SIGTRAP)
You’re using a third-party crash reporter and it’s undermining your ability to debug this issue. This is not uncommon. I discuss this in way too much detail in Implementing Your Own Crash Reporter. My advice is that you remove your third-party crash reporter and then wait for new Apple crash reports to arrive. To illustrate the sorts of problems I’m talking about here, let me pull apart that second crash report, starting with this: Exception Type: EXC_CRASH (SIGSEGV) Exception Codes: 0x0000000000000000, 0x0000000000000000 Triggered by Thread: 0 This shows that your process crashed due to a memory access exception. That it, it was running some code that accessed an invalid memory location. Let’s look at the backtrace of the crashing thread: Thread 0 name: Thread 0 Crashed: 0 libsystem_kernel.dylib … mach_msg2_trap + 8 (:-1) 1 libsystem_kernel.dylib … mach_msg2_internal + 76 (mach_msg.c:201) 2 libsystem_kernel.dylib … mach_msg_overwrite + 4
Topic: App & System Services SubTopic: General Tags:
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UISlider valueChanged has uninitialized UIEvent
This issue was in the first iOS 26 beta and it still there with Xcode 26 beta 6 (17A5305f). Feedback is FB18581605 and contains sample project to reproduce the issue. I assign a target and action to a UISlider for the UIControl.Event.valueChanged value: addTarget(self, action: #selector(sliderValueDidChange), for: .valueChanged) Here’s the function. @objc func sliderValueDidChange(_ sender: UISlider, event: UIEvent) { print(event) } When printing the event value, there is a crash. When checking the event value with lldb, it appears uninitialized.
Topic: UI Frameworks SubTopic: UIKit Tags:
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UIKit crash on app built with Xcode 26 but run on iOS 18.X
An app built on Xcode 26 (beta4) presents various UIViewCOntrollers. Presentation of any UIViewController that contains a UIToolbar leads to a UIKit crash when run on an iOS 18.5 device, it does not crash when run on iOS 26. The exception logged: *** Terminating app due to uncaught exception 'NSInvalidUnarchiveOperationException', reason: 'Could not instantiate class named TtGC5UIKit17UICoreHostingViewVCS_21ToolbarVisualProvider8RootView because no class named TtGC5UIKit17UICoreHostingViewVCS_21ToolbarVisualProvider8RootView was found; the class needs to be defined in source code or linked in from a library (ensure the class is part of the correct target)' Anyone else seen this? I've submitted a bug report via Feedback Assistant, including a minimal Xcode workspace that reproduces the crash, hoping this will get some attention.
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Aug ’25
Reply to Invalid Code Signing Entitlements
I have the same problem. Dis you solve that? I do not have a crash on payment, because I set IgnoreInvalidProducts with true value. But with this case i can not receive my subscriptions… I receive invalid products array with my subscription ID… I can offer you to try this: https://github.com/9khub/MAUI.StoreKit2
Topic: Code Signing SubTopic: Entitlements Tags:
Aug ’25
TextKit 2 undocumented and unexpected behavior in textViewportLayoutControllerDidLayout
The NSTextViewportLayoutControllerDelegate.textViewportLayoutControllerDidLayout(_:) documentation states that Layout information on textViewportLayoutController is up-to-date at the point of this call. however it is easy to put the NSTextViewportLayoutController in a state where after calling textViewportLayoutControllerDidLayout, the value of viewportRange is nil (unexpected) and value of the property viewportBounds is .zero The TextKit2 sample application found at https://developer.apple.com/documentation/uikit/using-textkit-2-to-interact-with-text makes that assumption as well, and in few places force unwrap the value of viewportRange, that leads to runtime crashes. This behavior is also discussed in Developer Forum thread about TextKit2 viewport relocation: https://developer.apple.com/forums/thread/761364?answerId=800516022#800516022 How to reproduce: Run Mac target of LayoutWithTextKit2 sample project found at https://developer.apple.com/documentation/uikit/using-textkit-2-to-interact-with-text
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Aug ’25