Created attachment 468319 [details] Crash Log Hit this ASSERT_NOT_REACHED showing the 1Password extension popup in Safari a couple times. Thread 8 Crashed:: RemoteRenderingBackend work queue 0 JavaScriptCore 0x13c899244 WTFCrash + 24 (Assertions.cpp:333) 1 WebKit 0x11c38eb04 WTFCrashWithInfo(int, char const*, char const*, int) + 36 (Assertions.h:778) 2 WebKit 0x11d25a3a8 WebKit::RemoteDisplayListRecorder::clipToImageBuffer(WTF::ObjectIdentifierGeneric<WebCore::RenderingResourceIdentifierType, WTF::ObjectIdentifierThreadSafeAccessTraits>, WebCore::FloatRect const&) + 148 (RemoteDisplayListRecorder.cpp:224) 3 WebKit 0x11cee1e20 auto void IPC::callMemberFunction<WebKit::RemoteDisplayListRecorder, WebKit::RemoteDisplayListRecorder, void (WTF::ObjectIdentifierGeneric<WebCore::RenderingResourceIdentifierType, WTF::ObjectIdentifierThreadSafeAccessTraits>, WebCore::FloatRect const&), std::__1::tuple<WTF::ObjectIdentifierGeneric<WebCore::RenderingResourceIdentifierType, WTF::ObjectIdentifierThreadSafeAccessTraits>, WebCore::FloatRect>>(WebKit::RemoteDisplayListRecorder*, void (WebKit::RemoteDisplayListRecorder::*)(WTF::ObjectIdentifierGeneric<WebCore::RenderingResourceIdentifierType, WTF::ObjectIdentifierThreadSafeAccessTraits>, WebCore::FloatRect const&), std::__1::tuple<WTF::ObjectIdentifierGeneric<WebCore::RenderingResourceIdentifierType, WTF::ObjectIdentifierThreadSafeAccessTraits>, WebCore::FloatRect>&&)::'lambda'(auto&&...)::operator()<WTF::ObjectIdentifierGeneric<WebCore::RenderingResourceIdentifierType, WTF::ObjectIdentifierThreadSafeAccessTraits>, WebCore::FloatRect>(auto&&...) const + 200 (HandleMessage.h:136)
<rdar://problem/117421649>