These three tests are consistently asserting on macOS debug bots: TestWebKitAPI.WKWebView.LoadSimulatedRequestUpdatesBackForwardList TestWebKitAPI.WKWebView.LoadSimulatedRequestUsingResponseData TestWebKitAPI.WKWebView.LoadSimulatedRequestUsingResponseHTMLString ASSERTION FAILED: response.certificateInfo() ./loader/DocumentLoader.cpp(836) : void WebCore::DocumentLoader::responseReceived(const WebCore::ResourceResponse &, CompletionHandler<void ()> &&) 1 0x14622c169 WTFCrash 2 0x12856d25b WTFCrashWithInfo(int, char const*, char const*, int) 3 0x12c28f3c4 WebCore::DocumentLoader::responseReceived(WebCore::ResourceResponse const&, WTF::CompletionHandler<void ()>&&) 4 0x12c28f259 WebCore::DocumentLoader::handleSubstituteDataLoadNow() 5 0x12c2be3f2 WebCore::DocumentLoader::tryLoadingSubstituteData()::$_5::operator()() const 6 0x12c2be29e WTF::Detail::CallableWrapper<WebCore::DocumentLoader::tryLoadingSubstituteData()::$_5, void>::call() 7 0x146257a52 WTF::Function<void ()>::operator()() const 8 0x1462df2df WTF::RunLoop::dispatch(WTF::HashSet<WTF::RefPtr<WTF::SchedulePair, WTF::RawPtrTraits<WTF::SchedulePair>, WTF::DefaultRefDerefTraits<WTF::SchedulePair> >, WTF::SchedulePairHash, WTF::HashTraits<WTF::RefPtr<WTF::SchedulePair, WTF::RawPtrTraits<WTF::SchedulePair>, WTF::DefaultRefDerefTraits<WTF::SchedulePair> > > > const&, WTF::Function<void ()>&&)::$_0::operator()(__CFRunLoopTimer*, void*) const 9 0x1462df28d WTF::RunLoop::dispatch(WTF::HashSet<WTF::RefPtr<WTF::SchedulePair, WTF::RawPtrTraits<WTF::SchedulePair>, WTF::DefaultRefDerefTraits<WTF::SchedulePair> >, WTF::SchedulePairHash, WTF::HashTraits<WTF::RefPtr<WTF::SchedulePair, WTF::RawPtrTraits<WTF::SchedulePair>, WTF::DefaultRefDerefTraits<WTF::SchedulePair> > > > const&, WTF::Function<void ()>&&)::$_0::__invoke(__CFRunLoopTimer*, void*) 10 0x7fff2046390d __CFRUNLOOP_IS_CALLING_OUT_TO_A_TIMER_CALLBACK_FUNCTION__ 11 0x7fff204633e8 __CFRunLoopDoTimer 12 0x7fff20462f42 __CFRunLoopDoTimers 13 0x7fff2044957f __CFRunLoopRun 14 0x7fff204486ce CFRunLoopRunSpecific 15 0x7fff211d5fa1 -[NSRunLoop(NSRunLoop) runMode:beforeDate:] 16 0x7fff21264384 -[NSRunLoop(NSRunLoop) run] 17 0x7fff2009f3dd _xpc_objc_main 18 0x7fff2009ee65 _xpc_copy_xpcservice_dictionary 19 0x119da781c WebKit::XPCServiceMain(int, char const**) 20 0x11b3cb23b WKXPCServiceMain 21 0x10e8daea2 main 22 0x7fff2036d621 start 23 0x1 https://results.webkit.org/?suite=api-tests&suite=api-tests&suite=api-tests&test=TestWebKitAPI.WKWebView.LoadSimulatedRequestUpdatesBackForwardList&test=TestWebKitAPI.WKWebView.LoadSimulatedRequestUsingResponseHTMLString&test=TestWebKitAPI.WKWebView.LoadSimulatedRequestUsingResponseData
It looks like this started with https://trac.webkit.org/changeset/273048/webkit
<rdar://problem/74456462>
(In reply to Ryan Haddad from comment #1) > It looks like this started with > https://trac.webkit.org/changeset/273048/webkit I got my commits mixed up, this is actually the fix for the problem that was introduced by https://trac.webkit.org/changeset/273023/webkit