[Webkit-unassigned] [Bug 189663] REGRESSION (PSON): White or Black flash occurs when process swapping on navigation on Mac

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=189663

--- Comment #15 from Ryan Haddad <ryanhaddad at apple.com> ---
(In reply to Chris Dumez from comment #14)
> (In reply to Ryan Haddad from comment #13)
> > This change caused 6 TestWebKitAPI.ProcessSwap failures and 1 timeout on iOS
> > Simulator: 
> > 
> > https://build.webkit.org/builders/
> > Apple%20iOS%2011%20Simulator%20Release%20WK2%20(Tests)/builds/7469
> 
> Chances are it is causing some WebContent crashes?
Now we have results from a debug bot:
https://build.webkit.org/builders/Apple%20iOS%2011%20Simulator%20Debug%20WK2%20%28Tests%29/builds/6484/steps/run-api-tests/logs/stdio

        ASSERTION FAILED: m_messageReceivers.contains(std::make_pair(messageReceiverName, destinationID))
        /Volumes/Data/slave/ios-simulator-11-debug/build/Source/WebKit/Platform/IPC/MessageReceiverMap.cpp(72) : void IPC::MessageReceiverMap::removeMessageReceiver(IPC::StringReference, uint64_t)
        1   0x10e50b9d9 WTFCrash
        2   0x1148277cb WTFCrashWithInfo(int, char const*, char const*, int)
        3   0x1148b0c50 IPC::MessageReceiverMap::removeMessageReceiver(IPC::StringReference, unsigned long long)
        4   0x114dc6307 WebKit::ChildProcessProxy::removeMessageReceiver(IPC::StringReference, unsigned long long)
        5   0x115085a58 WebKit::SmartMagnificationController::~SmartMagnificationController()
        6   0x115085aa5 WebKit::SmartMagnificationController::~SmartMagnificationController()
        7   0x115085ac9 WebKit::SmartMagnificationController::~SmartMagnificationController()
        8   0x1158ab985 -[WKContentView(WKInteraction) cleanupInteraction]
        9   0x11589e50b -[WKContentView dealloc]
        10  0x113e631b2 (anonymous namespace)::AutoreleasePoolPage::pop(void*)
        11  0x12a019136 _CFAutoreleasePoolPop
        12  0x11383e8bc -[NSAutoreleasePool drain]
        13  0x10db89888 main
        14  0x12a6b1955 start

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