Our iOS application contains WKWebView.
Here is the crash report. Does anyone know what the crash is about?
#2. Crashed: WebThread
0 WebCore 0x1bc7e83c4 WebCore::CrossOriginPreflightChecker::validatePreflightResponse(WebCore::DocumentThreadableLoader&, WebCore::ResourceRequest&&, unsigned long, WebCore::ResourceResponse const&) + 460
1 WebCore 0x1bc7e83c4 WebCore::CrossOriginPreflightChecker::validatePreflightResponse(WebCore::DocumentThreadableLoader&, WebCore::ResourceRequest&&, unsigned long, WebCore::ResourceResponse const&) + 460
2 WebCore 0x1bc7e8f88 WebCore::CrossOriginPreflightChecker::doPreflight(WebCore::DocumentThreadableLoader&, WebCore::ResourceRequest&&) + 1032
3 WebCore 0x1bc7fc240 WebCore::DocumentThreadableLoader::makeCrossOriginAccessRequest(WebCore::ResourceRequest&&) + 672
4 WebCore 0x1bc7fb024 WebCore::DocumentThreadableLoader::DocumentThreadableLoader(WebCore::Document&, WebCore::ThreadableLoaderClient&, WebCore::DocumentThreadableLoader::BlockingBehavior, WebCore::ResourceRequest&&, WebCore::ThreadableLoaderOptions const&, ***::RefPtr<WebCore::SecurityOrigin, ***::DumbPtrTraits<WebCore::SecurityOrigin> >&&, std::__1::unique_ptr<WebCore::ContentSecurityPolicy, std::__1::default_delete<WebCore::ContentSecurityPolicy> >&&, ***::String&&, WebCore::DocumentThreadableLoader::ShouldLogError) + 1108
5 WebCore 0x1bc7fa7c4 WebCore::DocumentThreadableLoader::loadResourceSynchronously(WebCore::Document&, WebCore::ResourceRequest&&, WebCore::ThreadableLoaderClient&, WebCore::ThreadableLoaderOptions const&) + 108
6 WebCore 0x1bc8494f8 WebCore::ThreadableLoader::loadResourceSynchronously(WebCore::ScriptExecutionContext&, WebCore::ResourceRequest&&, WebCore::ThreadableLoaderClient&, WebCore::ThreadableLoaderOptions const&) + 92
7 WebCore 0x1bced5374 WebCore::XMLHttpRequest::createRequest() + 1180
8 WebCore 0x1bced4ad8 WebCore::XMLHttpRequest::send(***::String const&) + 804
9 WebCore 0x1bced4614 WebCore::XMLHttpRequest::send(***::Optional<***::Variant<***::RefPtr<WebCore::Document, ***::DumbPtrTraits<WebCore::Document> >, ***::RefPtr<WebCore::Blob, ***::DumbPtrTraits<WebCore::Blob> >, ***::RefPtr<JSC::ArrayBufferView, ***::DumbPtrTraits<JSC::ArrayBufferView> >, ***::RefPtr<JSC::ArrayBuffer, ***::DumbPtrTraits<JSC::ArrayBuffer> >, ***::RefPtr<WebCore::DOMFormData, ***::DumbPtrTraits<WebCore::DOMFormData> >, ***::String> >&&) + 132
10 WebCore 0x1bbfb7e88 WebCore::jsXMLHttpRequestPrototypeFunctionSend(JSC::ExecState*) + 292
11 JavaScriptCore 0x1ba2d3d8c llint_entry + 89612
12 JavaScriptCore 0x1ba2d23a4 llint_entry + 82980
13 JavaScriptCore 0x1ba2d23a4 llint_entry + 82980
14 JavaScriptCore 0x1ba2bdcec vmEntryToJavaScript + 268
15 JavaScriptCore 0x1ba7ef4d0 JSC::Interpreter::executeCall(JSC::ExecState*, JSC::JSObject*, JSC::CallType, JSC::CallData const&, JSC::JSValue, JSC::ArgList const&) + 424
16 JavaScriptCore 0x1ba9d168c JSC::profiledCall(JSC::ExecState*, JSC::ProfilingReason, JSC::JSValue, JSC::CallType, JSC::CallData const&, JSC::JSValue, JSC::ArgList const&, ***::NakedPtr<JSC::Exception>&) + 200
17 WebCore 0x1bc20facc WebCore::JSExecState::profiledCall(JSC::ExecState*, JSC::ProfilingReason, JSC::JSValue, JSC::CallType, JSC::CallData const&, JSC::JSValue, JSC::ArgList const&, ***::NakedPtr<JSC::Exception>&) + 140
18 WebCore 0x1bc22724c WebCore::JSEventListener::handleEvent(WebCore::ScriptExecutionContext&, WebCore::Event&) + 1092
19 WebCore 0x1bc4a2370 WebCore::EventTarget::innerInvokeEventListeners(WebCore::Event&, ***::Vector<***::RefPtr<WebCore::RegisteredEventListener, ***::DumbPtrTraits<WebCore::RegisteredEventListener> >, 1ul, ***::CrashOnOverflow, 16ul>, WebCore::EventTarget::EventInvokePhase) + 740
20 WebCore 0x1bc49fbcc WebCore::EventTarget::fireEventListeners(WebCore::Event&, WebCore::EventTarget::EventInvokePhase) + 268
21 WebCore 0x1bc49faac WebCore::WindowEventContext::handleLocalEvents(WebCore::Event&, WebCore::EventTarget::EventInvokePhase) const + 120
22 WebCore 0x1bc49c518 WebCore::EventDispatcher::dispatchEvent(WebCore::Node&, WebCore::Event&) + 868
23 WebCore 0x1bc46e290 WebCore::DocumentEventQueue::pendingEventTimerFired() + 276
24 WebCore 0x1bc98e5bc WebCore::ThreadTimers::sharedTimerFiredInternal() + 216
25 WebCore 0x1bc9ae608 WebCore::timerFired(__CFRunLoopTimer*, void*) + 28
26 CoreFoundation 0x1b2eacd60 __CFRUNLOOP_IS_CALLING_OUT_TO_A_TIMER_CALLBACK_FUNCTION__ + 28
27 CoreFoundation 0x1b2eaca90 __CFRunLoopDoTimer + 864
28 CoreFoundation 0x1b2eac2c4 __CFRunLoopDoTimers + 248
29 CoreFoundation 0x1b2ea7214 __CFRunLoopRun + 1844
30 CoreFoundation 0x1b2ea67c0 CFRunLoopRunSpecific + 436
31 WebCore 0x1bbb99fc4 RunWebThread(void*) + 600
32 libsystem_pthread.dylib 0x1b2b392c0 _pthread_body + 128
33 libsystem_pthread.dylib 0x1b2b39220 _pthread_start + 44
34 libsystem_pthread.dylib 0x1b2b3ccdc thread_start + 4
