iOS 18.1 crash UIHostingView.layoutSubviews() / swift_unknownObjectWeakAssign / objc_storeWeak

UI Frameworks SwiftUI
cdubs2000 OP
Created 1w
Replies 3
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We're seeing sporadic crashes on devices running iOS 18.1 - both beta and release builds (22B83). The stack trace is always identical, a snippet of it below. As you can tell from the trace, it's happening in places we embed SwiftUI into UIKit via UIHostingController.

Anyone else seeing this?

4 libobjc.A.dylib 0xbe2c _objc_fatalv(unsigned long long, unsigned long long, char const*, char*) + 30

5 libobjc.A.dylib 0xb040 weak_register_no_lock + 396

6 libobjc.A.dylib 0xac50 objc_storeWeak + 472

7 libswiftCore.dylib 0x43ac34 swift_unknownObjectWeakAssign + 24

8 SwiftUI 0xeb74c8 _UIHostingView.base.getter + 160

9 SwiftUI 0x92124 _UIHostingView.layoutSubviews() + 112

10 SwiftUI 0x47860 @objc _UIHostingView.layoutSubviews() + 36

Replies  3
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Engineer OP
Apple
1w

Take a look at the documentation for debugging techniques that has guidance on debugging common reasons for a crash. If you get stuck, let us know what you tried, and attach the fully symbolicated Apple crash report in your reply. Posting a Crash Report explains how to do so.

0
cdubs2000 OP
1w

Full stack trace attached. Haven't been able to reproduce. This is a widespread issue across our app. Again, only seeing on iOS 18.1, no other iOS versions.

crash.txt
0
cdubs2000 OP
6d

2024-11-12_20-28-00.8459_-0800-6a99b1cf2e50beebded1c389fbb431b74f226f68.crash
0
iOS 18.1 crash UIHostingView.layoutSubviews() / swift_unknownObjectWeakAssign / objc_storeWeak
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