ASSERTION FAILED: m_inAsyncResponsePolicyCheck while closing multiple MiniBrowser windows Set this as default homepage: https://anygivenmonday.org/clients/webkit_bug/pixi/ Press cmd-n for, say, 7 times Wait for few seconds Press cmd-w for, say, 5 times with 0.5s - 1s intervals ASSERTION FAILED: m_inAsyncResponsePolicyCheck ./loader/SubresourceLoader.cpp(515) : void WebCore::SubresourceLoader::didReceiveResponsePolicy() 1 0x45c10b6f9 WTFCrash 2 0x46ed284ab WTFCrashWithInfo(int, char const*, char const*, int) 3 0x47294d33b WebCore::SubresourceLoader::didReceiveResponsePolicy() 4 0x47288d5ad WebCore::DocumentLoader::responseReceived(WebCore::ResourceResponse const&, WTF::CompletionHandler<void ()>&&)::$_5::operator()(WebCore::PolicyAction, WebCore::PolicyCheckIdentifier) 5 0x47288d396 WTF::Detail::CallableWrapper<WebCore::DocumentLoader::responseReceived(WebCore::ResourceResponse const&, WTF::CompletionHandler<void ()>&&)::$_5, void, WebCore::PolicyAction, WebCore::PolicyCheckIdentifier>::call(WebCore::PolicyAction, WebCore::PolicyCheckIdentifier) 6 0x4441ebebb WTF::Function<void (WebCore::PolicyAction, WebCore::PolicyCheckIdentifier)>::operator()(WebCore::PolicyAction, WebCore::PolicyCheckIdentifier) const 7 0x444297f6b WebKit::WebFrame::didReceivePolicyDecision(unsigned long long, WebKit::PolicyDecision&&) 8 0x4444887b3 WebKit::WebPage::didReceivePolicyDecision(WTF::ObjectIdentifier<WebCore::FrameIdentifierType>, unsigned long long, WebKit::PolicyDecision&&, WTF::Vector<WebKit::SandboxExtension::Handle, 0ul, WTF::CrashOnOverflow, 16ul, WTF::FastMalloc> const&) 9 0x444551278 void IPC::callMemberFunctionImpl<WebKit::WebPage, void (WebKit::WebPage::*)(WTF::ObjectIdentifier<WebCore::FrameIdentifierType>, unsigned long long, WebKit::PolicyDecision&&, WTF::Vector<WebKit::SandboxExtension::Handle, 0ul, WTF::CrashOnOverflow, 16ul, WTF::FastMalloc> const&), std::__1::tuple<WTF::ObjectIdentifier<WebCore::FrameIdentifierType>, unsigned long long, WebKit::PolicyDecision, WTF::Vector<WebKit::SandboxExtension::Handle, 0ul, WTF::CrashOnOverflow, 16ul, WTF::FastMalloc> >, 0ul, 1ul, 2ul, 3ul>(WebKit::WebPage*, void (WebKit::WebPage::*)(WTF::ObjectIdentifier<WebCore::FrameIdentifierType>, unsigned long long, WebKit::PolicyDecision&&, WTF::Vector<WebKit::SandboxExtension::Handle, 0ul, WTF::CrashOnOverflow, 16ul, WTF::FastMalloc> const&), std::__1::tuple<WTF::ObjectIdentifier<WebCore::FrameIdentifierType>, unsigned long long, WebKit::PolicyDecision, WTF::Vector<WebKit::SandboxExtension::Handle, 0ul, WTF::CrashOnOverflow, 16ul, WTF::FastMalloc> >&&, std::__1::integer_sequence<unsigned long, 0ul, 1ul, 2ul, 3ul>) 10 0x44454ea7d void IPC::callMemberFunction<WebKit::WebPage, void (WebKit::WebPage::*)(WTF::ObjectIdentifier<WebCore::FrameIdentifierType>, unsigned long long, WebKit::PolicyDecision&&, WTF::Vector<WebKit::SandboxExtension::Handle, 0ul, WTF::CrashOnOverflow, 16ul, WTF::FastMalloc> const&), std::__1::tuple<WTF::ObjectIdentifier<WebCore::FrameIdentifierType>, unsigned long long, WebKit::PolicyDecision, WTF::Vector<WebKit::SandboxExtension::Handle, 0ul, WTF::CrashOnOverflow, 16ul, WTF::FastMalloc> >, std::__1::integer_sequence<unsigned long, 0ul, 1ul, 2ul, 3ul> >(std::__1::tuple<WTF::ObjectIdentifier<WebCore::FrameIdentifierType>, unsigned long long, WebKit::PolicyDecision, WTF::Vector<WebKit::SandboxExtension::Handle, 0ul, WTF::CrashOnOverflow, 16ul, WTF::FastMalloc> >&&, WebKit::WebPage*, void (WebKit::WebPage::*)(WTF::ObjectIdentifier<WebCore::FrameIdentifierType>, unsigned long long, WebKit::PolicyDecision&&, WTF::Vector<WebKit::SandboxExtension::Handle, 0ul, WTF::CrashOnOverflow, 16ul, WTF::FastMalloc> const&)) 11 0x4444fb170 void IPC::handleMessage<Messages::WebPage::DidReceivePolicyDecision, WebKit::WebPage, void (WebKit::WebPage::*)(WTF::ObjectIdentifier<WebCore::FrameIdentifierType>, unsigned long long, WebKit::PolicyDecision&&, WTF::Vector<WebKit::SandboxExtension::Handle, 0ul, WTF::CrashOnOverflow, 16ul, WTF::FastMalloc> const&)>(IPC::Connection&, IPC::Decoder&, WebKit::WebPage*, void (WebKit::WebPage::*)(WTF::ObjectIdentifier<WebCore::FrameIdentifierType>, unsigned long long, WebKit::PolicyDecision&&, WTF::Vector<WebKit::SandboxExtension::Handle, 0ul, WTF::CrashOnOverflow, 16ul, WTF::FastMalloc> const&)) 12 0x4444f16bb WebKit::WebPage::didReceiveWebPageMessage(IPC::Connection&, IPC::Decoder&) 13 0x4444912e3 WebKit::WebPage::didReceiveMessage(IPC::Connection&, IPC::Decoder&) 14 0x4426d5403 IPC::MessageReceiverMap::dispatchMessage(IPC::Connection&, IPC::Decoder&) 15 0x443ded9f1 WebKit::WebProcess::didReceiveMessage(IPC::Connection&, IPC::Decoder&) 16 0x442196cbe IPC::Connection::dispatchMessage(IPC::Decoder&) 17 0x442197432 IPC::Connection::dispatchMessage(std::__1::unique_ptr<IPC::Decoder, std::__1::default_delete<IPC::Decoder> >) 18 0x4421979fd IPC::Connection::dispatchOneIncomingMessage() 19 0x4421b79e5 IPC::Connection::enqueueIncomingMessage(std::__1::unique_ptr<IPC::Decoder, std::__1::default_delete<IPC::Decoder> >)::$_12::operator()() 20 0x4421b78f9 WTF::Detail::CallableWrapper<IPC::Connection::enqueueIncomingMessage(std::__1::unique_ptr<IPC::Decoder, std::__1::default_delete<IPC::Decoder> >)::$_12, void>::call() 21 0x45c134582 WTF::Function<void ()>::operator()() const 22 0x45c1b1bbe WTF::RunLoop::performWork() 23 0x45c1b548e WTF::RunLoop::performWork(void*) 24 0x7ff80de218bd __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ 25 0x7ff80de21825 __CFRunLoopDoSource0 26 0x7ff80de215a4 __CFRunLoopDoSources0 27 0x7ff80de1ffdb __CFRunLoopRun 28 0x7ff80de1f59d CFRunLoopRunSpecific 29 0x7ff80ec8529e -[NSRunLoop(NSRunLoop) runMode:beforeDate:] 30 0x7ff80ed0f5e3 -[NSRunLoop(NSRunLoop) run] 31 0x7ff80daae233 _xpc_objc_main
<rdar://problem/84651889>