[Webkit-unassigned] [Bug 187926] WKWebView in a modal presentation dismisses its presenting view controller.

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=187926

--- Comment #3 from Wenson Hsieh <wenson_hsieh at apple.com> ---
(In reply to Tom Harrington from comment #1)
> Sorry, I pasted the same backtrace twice. The second one should be as
> follows.
> 
> (lldb) bt
> * thread #1, queue = 'com.apple.main-thread', stop reason = breakpoint 4.1
>   * frame #0: 0x000000018f006130 UIKit`-[UIViewController
> dismissViewControllerAnimated:completion:]
>     frame #1: 0x0000000194eb2bd8 WebKit`-[WKActionSheet doneWithSheet:] + 56
>     frame #2: 0x0000000194eb62a8 WebKit`-[WKActionSheetAssistant
> cleanupSheet] + 128
>     frame #3: 0x000000018f006058 UIKit`-[UIAlertController
> _invokeHandlersForAction:] + 108
>     frame #4: 0x000000018f41dffc UIKit`__103-[UIAlertController
> _dismissAnimated:triggeringAction:triggeredByPopoverDimmingView:
> dismissCompletion:]_block_invoke.461 + 28
>     frame #5: 0x000000018f012364 UIKit`-[UIPresentationController
> transitionDidFinish:] + 1320
>     frame #6: 0x000000018f2a3c88 UIKit`__56-[UIPresentationController
> runTransitionForCurrentState]_block_invoke.436 + 188
>     frame #7: 0x000000018ee15b88 UIKit`-[_UIViewControllerTransitionContext
> completeTransition:] + 116
>     frame #8: 0x000000018ee15730 UIKit`-[UIViewAnimationBlockDelegate
> _didEndBlockAnimation:finished:context:] + 760
>     frame #9: 0x000000018ee150b8 UIKit`-[UIViewAnimationState
> sendDelegateAnimationDidStop:finished:] + 312
>     frame #10: 0x000000018eefefcc UIKit`-[UIViewAnimationState
> animationDidStop:finished:] + 296
>     frame #11: 0x000000018eeff06c UIKit`-[UIViewAnimationState
> animationDidStop:finished:] + 456
>     frame #12: 0x00000001893a5504
> QuartzCore`CA::Layer::run_animation_callbacks(void*) + 284
>     frame #13: 0x000000010520d19c libdispatch.dylib`_dispatch_client_callout
> + 16
>     frame #14: 0x0000000105211d2c
> libdispatch.dylib`_dispatch_main_queue_callback_4CF + 1180
>     frame #15: 0x00000001851b7070
> CoreFoundation`__CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ + 12
>     frame #16: 0x00000001851b4bc8 CoreFoundation`__CFRunLoopRun + 2272
>     frame #17: 0x00000001850d4da8 CoreFoundation`CFRunLoopRunSpecific + 552
>     frame #18: 0x00000001870b9020 GraphicsServices`GSEventRunModal + 100
>     frame #19: 0x000000018f0f1758 UIKit`UIApplicationMain + 236

Thanks for the information and test app, Tom!

I believe I've fixed this in <https://bugs.webkit.org/show_bug.cgi?id=183549>, which first went into iOS 12. I installed the test app (DismissDemo) on my build of iOS 12, and could not reproduce; could you verify on any beta version of iOS 12?

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