WTFCrash () at ./Source/WTF/wtf/Assertions.cpp:278
WebKit::CallbackMap::put (this=0x7f29bd8f3170, callback=...) at ./Source/WebKit/UIProcess/GenericCallback.h:178
WebKit::CallbackMap::put<API::SerializedScriptValue*, bool, WebCore::ExceptionDetails const&, WebKit::CallbackBase::Error>(WTF::Function<void (API::SerializedScriptValue*, bool, WebCore::ExceptionDetails const&, WebKit::CallbackBase::Error)>&&, WTF::RefPtr<WTF::RefCounter<WebKit::ProcessThrottler::BackgroundActivityCounterType>::Count> const&) (activityToken=..., function=..., this=0x7f29bd8f3170) at ./Source/WebKit/UIProcess/GenericCallback.h:200
WebKit::WebPageProxy::runJavaScriptInMainFrame(WTF::String const&, bool, WTF::Function<void (API::SerializedScriptValue*, bool, WebCore::ExceptionDetails const&, WebKit::CallbackBase::Error)>&&) (this=this@entry=0x7f29bd8f3000, script=..., forceUserGesture=forceUserGesture@entry=true, callbackFunction=...) at ./Source/WebKit/UIProcess/WebPageProxy.cpp:2851
webkit_web_view_run_javascript (webView=<optimized out>, script=0x7f2984001090 "$(\"#device-IO1545F01800226-brightness\").html(' ')", cancellable=<optimized out>, callback=<optimized out>, userData=0x0) at ./Source/WebKit/UIProcess/API/glib/WebKitWebView.cpp:3209