Created attachment 331526 [details] Crash log The following assertion failure was seen on iOS with LayoutTest http/tests/navigation/https-in-page-cache.html ASSERTION FAILED: !m_frame /Volumes/Data/slave/ios-simulator-11-debug/build/Source/WebCore/page/DOMWindowProperty.cpp(83) : virtual void WebCore::DOMWindowProperty::willDestroyGlobalObjectInCachedFrame() 1 0x11039928d WTFCrash 2 0x114ea7a67 WebCore::DOMWindowProperty::willDestroyGlobalObjectInCachedFrame() 3 0x114e9ba51 WebCore::DOMWindow::willDestroyCachedFrame() 4 0x11495f945 WebCore::CachedFrame::destroy() 5 0x1149619e9 WebCore::CachedPage::~CachedPage() 6 0x114961ad5 WebCore::CachedPage::~CachedPage() 7 0x114963936 WebCore::PageCache::remove(WebCore::HistoryItem&) 8 0x1072a68d1 WebKit::WebBackForwardListProxy::removeItem(unsigned long long) 9 0x107471039 WebKit::WebPage::didRemoveBackForwardItem(unsigned long long) 10 0x1075257ed void IPC::callMemberFunctionImpl<WebKit::WebPage, void (WebKit::WebPage::*)(unsigned long long), std::__1::tuple<unsigned long long>, 0ul>(WebKit::WebPage*, void (WebKit::WebPage::*)(unsigned long long), std::__1::tuple<unsigned long long>&&, std::__1::integer_sequence<unsigned long, 0ul>) 11 0x107525740 void IPC::callMemberFunction<WebKit::WebPage, void (WebKit::WebPage::*)(unsigned long long), std::__1::tuple<unsigned long long>, std::__1::integer_sequence<unsigned long, 0ul> >(std::__1::tuple<unsigned long long>&&, WebKit::WebPage*, void (WebKit::WebPage::*)(unsigned long long)) 12 0x107514df0 void IPC::handleMessage<Messages::WebPage::DidRemoveBackForwardItem, WebKit::WebPage, void (WebKit::WebPage::*)(unsigned long long)>(IPC::Decoder&, WebKit::WebPage*, void (WebKit::WebPage::*)(unsigned long long)) 13 0x107509308 WebKit::WebPage::didReceiveWebPageMessage(IPC::Connection&, IPC::Decoder&) 14 0x107470743 WebKit::WebPage::didReceiveMessage(IPC::Connection&, IPC::Decoder&) 15 0x107470784 non-virtual thunk to WebKit::WebPage::didReceiveMessage(IPC::Connection&, IPC::Decoder&) 16 0x106e12148 IPC::MessageReceiverMap::dispatchMessage(IPC::Connection&, IPC::Decoder&) 17 0x1076e620d WebKit::WebProcess::didReceiveMessage(IPC::Connection&, IPC::Decoder&) 18 0x106d11f13 IPC::Connection::dispatchMessage(IPC::Decoder&) 19 0x106d07be8 IPC::Connection::dispatchMessage(std::__1::unique_ptr<IPC::Decoder, std::__1::default_delete<IPC::Decoder> >) 20 0x106d1251a IPC::Connection::dispatchOneMessage() 21 0x106d2a33d IPC::Connection::enqueueIncomingMessage(std::__1::unique_ptr<IPC::Decoder, std::__1::default_delete<IPC::Decoder> >)::$_14::operator()() 22 0x106d2a299 WTF::Function<void ()>::CallableWrapper<IPC::Connection::enqueueIncomingMessage(std::__1::unique_ptr<IPC::Decoder, std::__1::default_delete<IPC::Decoder> >)::$_14>::call() 23 0x1103b554b WTF::Function<void ()>::operator()() const 24 0x1103f8c33 WTF::RunLoop::performWork() 25 0x1103f94d4 WTF::RunLoop::performWork(void*) 26 0x1040852b1 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ 27 0x104124d31 __CFRunLoopDoSource0 28 0x104069c19 __CFRunLoopDoSources0 29 0x1040691ff __CFRunLoopRun 30 0x104068a89 CFRunLoopRunSpecific 31 0x1033a5e5e -[NSRunLoop(NSRunLoop) runMode:beforeDate:] LEAK: 1 WebPageProxy https://build.webkit.org/results/Apple%20iOS%2011%20Simulator%20Debug%20WK2%20(Tests)/r227069%20(2128)/results.html