[Webkit-unassigned] [Bug 266902] New: WKWebView is crashing when loading in iOS 16.x

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=266902

            Bug ID: 266902
           Summary: WKWebView is crashing when loading in iOS 16.x
           Product: WebKit
           Version: Other
          Hardware: iPhone / iPad
                OS: iOS 16
            Status: NEW
          Severity: Blocker
          Priority: P2
         Component: WebKit API
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: raiam.quesada at ilumivu.com

Hi guys, I have more than 2000 users that have their app blocked because we submitted an update some days ago and now the app is no longer opening for them!

It's kinda strange to test, we have the same devices and the error rate is less than 1% (we have around 5M users), but the errors seems when we try to load a new instance of WKWebView, and getting some data from crashlytics this is the error:

com.apple.main-thread
0  libsystem_kernel.dylib         0x16cc stat + 8
1  libsystem_kernel.dylib         0x16cc stat64 + 8
2  Foundation                     0x2908c -[NSFileManager fileExistsAtPath:isDirectory:] + 92
3  Foundation                     0x27f38 -[NSURL(NSURL) initFileURLWithPath:] + 156
4  Foundation                     0x27e90 +[NSURL(NSURL) fileURLWithPath:] + 28
5  CoreUI                         0x5b6d0 +[CUIDesignLibraryCatalog catalogForDesignSystem:colorScheme:contrast:styling:error:] + 264
6  CoreUI                         0x5bfa4 +[CUIDesignLibraryCompositeCatalog _catalogsForDesignSystem:colorScheme:contrast:styling:error:] + 100
7  CoreUI                         0x5c214 +[CUIDesignLibraryCompositeCatalog compositeCatalogForDesignSystem:colorScheme:contrast:styling:error:] + 168
8  CoreUI                         0x3b008 +[CUIDesignLibrary colorWithName:designSystem:palette:colorScheme:contrast:styling:displayGamut:error:] + 108
9  CoreUI                         0x3af90 +[CUIDesignLibrary colorWithTraits:error:] + 44
10 UIKitCore                      0x95812c -[UIDynamicCatalogSystemColor _resolvedColorWithTraitCollection:] + 296
11 UIKitCore                      0x63ec8 -[UIDynamicColor CGColor] + 56
12 WebCore                        0xd82368 <redacted> + 68
13 WebCore                        0xd7a610 WebCore::RenderThemeIOS::cssValueToSystemColorMap() + 336
14 WebKit                         0x3dc7a4 <redacted> + 1280
15 WebKit                         0x55ff00 <redacted> + 1912
16 WebKit                         0x560868 <redacted> + 292
17 WebKit                         0x562238 <redacted> + 848
18 WebKit                         0x562484 <redacted> + 296
19 WebKit                         0x5e84 <redacted> + 64
20 WebKit                         0x5e18 <redacted> + 160
21 WebKit                         0x42ec <redacted> + 972
22 WebKit                         0x3f0c <redacted> + 68
23 PROJECT                        0xbac4 ViewController.initializeWebView() + 308 (ViewController.swift:308)
24 PROJECT                        0xaaec ViewController.mountWebView() + 210 (ViewController.swift:210)
25 PROJECT                        0xa19c ViewController.viewWillAppear(_:) + 157 (ViewController.swift:157)
26 PROJECT                        0xa1dc @objc ViewController.viewWillAppear(_:) + 40 (<compiler-generated>:40)
27 UIKitCore                      0xc880 -[UIViewController _setViewAppearState:isAnimating:] + 612
28 UIKitCore                      0xa66a8 -[UIViewController __viewWillAppear:] + 100
29 UIKitCore                      0x1914cc -[UINavigationController _startTransition:fromViewController:toViewController:] + 588
30 UIKitCore                      0x1907ec -[UINavigationController _startDeferredTransitionIfNeeded:] + 604
31 UIKitCore                      0x18fe78 -[UINavigationController __viewWillLayoutSubviews] + 92
32 UIKitCore                      0x18fde0 -[UILayoutContainerView layoutSubviews] + 168
33 UIKitCore                      0x47a8 -[UIView(CALayerDelegate) layoutSublayersOfLayer:] + 1932
34 QuartzCore                     0x960c CA::Layer::layout_if_needed(CA::Transaction*) + 496
35 QuartzCore                     0x1bf2c CA::Layer::layout_and_display_if_needed(CA::Transaction*) + 144
36 QuartzCore                     0x2c9f0 CA::Context::commit_transaction(CA::Transaction*, double, double*) + 456
37 QuartzCore                     0x59dc0 CA::Transaction::commit() + 644
38 QuartzCore                     0x44dbc CA::Transaction::flush_as_runloop_observer(bool) + 84
39 CoreFoundation                 0x898e8 __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 32
40 CoreFoundation                 0x1951c __CFRunLoopDoObservers + 552
41 CoreFoundation                 0x75214 __CFRunLoopRun + 1004
42 CoreFoundation                 0x79d20 CFRunLoopRunSpecific + 584
43 GraphicsServices               0x1998 GSEventRunModal + 160
44 UIKitCore                      0x37180c -[UIApplication _run] + 868
45 UIKitCore                      0x371484 UIApplicationMain + 312
46 PROJECT                        0x3bba8 main + 21 (AppDelegate.swift:21)
47 ???                            0x1f123c344 (Missing)


Our eng team has tried like 2 weeks to identify the root cause, but we can only say the only thing that changed, was the user of webkit in a newer version! We are able to see data with ios 16.x.x and some minor with ios 15.x.x, and iphone X, 6s, 7, 8, 11, 13, 13 Pro Max

any help would be needed!

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