Full backtrace attached. Truncated backtrace: Truncated backtrace: Thread no. 1 (10 frames) #0 WTF::Function<void (WTF::RefCounterEvent)>::operator()(WTF::RefCounterEvent) const at /usr/src/debug/webkitgtk-2.18.2/Source/WTF/wtf/Function.h:56 #1 WTF::RefCounter<WebKit::VisibleWebPageCounterType>::Count::ref at /usr/src/debug/webkitgtk-2.18.2/Source/WTF/wtf/RefCounter.h:87 #2 WTF::refIfNotNull<WTF::RefCounter<WebKit::VisibleWebPageCounterType>::Count> at /usr/src/debug/webkitgtk-2.18.2/Source/WTF/wtf/RefPtr.h:39 #3 WTF::RefPtr<WTF::RefCounter<WebKit::VisibleWebPageCounterType>::Count>::RefPtr at /usr/src/debug/webkitgtk-2.18.2/Source/WTF/wtf/RefPtr.h:57 #4 WTF::RefCounter<WebKit::VisibleWebPageCounterType>::count at /usr/src/debug/webkitgtk-2.18.2/Source/WTF/wtf/RefCounter.h:69 #5 WebKit::WebProcessProxy::visiblePageToken at /usr/src/debug/webkitgtk-2.18.2/Source/WebKit/UIProcess/WebProcessProxy.cpp:771 #6 WebKit::WebPageProxy::dispatchActivityStateChange at /usr/src/debug/webkitgtk-2.18.2/Source/WebKit/UIProcess/WebPageProxy.cpp:1482 #7 _WebKitWebViewBasePrivate::updateActivityStateTimerFired at /usr/src/debug/webkitgtk-2.18.2/Source/WebKit/UIProcess/API/gtk/WebKitWebViewBase.cpp:156 #8 WTF::RunLoop::TimerBase::<lambda(gpointer)>::operator() at /usr/src/debug/webkitgtk-2.18.2/Source/WTF/wtf/glib/RunLoopGLib.cpp:166 #9 WTF::RunLoop::TimerBase::<lambda(gpointer)>::_FUN(gpointer) at /usr/src/debug/webkitgtk-2.18.2/Source/WTF/wtf/glib/RunLoopGLib.cpp:170
Created attachment 336674 [details] Backtrace
We only have one single report of this ever happening.