(epiphany:21100): Gtk-WARNING **: GtkSocket: only works under X11

(epiphany:21100): Gdk-WARNING **: gdkwindow-x11.c:5573 drawable is not a native X11 window

Thread 1 "epiphany" received signal SIGSEGV, Segmentation fault.

(gdb) bt
#0  0x00007fffedb45ac2 in _XReply () at /lib64/libX11.so.6
#1  0x00007fffedb2c867 in _XGetWindowAttributes () at /lib64/libX11.so.6
#2  0x00007fffedb2c9f1 in XGetWindowAttributes () at /lib64/libX11.so.6
#3  0x00007ffff1245144 in gtk_socket_realize (widget=0x55555607af30 [GtkSocket]) at gtksocket.c:420
#4  0x00007fffef4e7764 in _g_closure_invoke_va (closure=closure@entry=0x5555557ce4a0, return_value=return_value@entry=0x0, instance=instance@entry=0x55555607af30, args=args@entry=0x7fffffffd320, n_params=<optimized out>, param_types=0x0) at gclosure.c:867
#5  0x00007fffef502cb9 in g_signal_emit_valist (instance=0x55555607af30, signal_id=<optimized out>, detail=0, var_args=var_args@entry=0x7fffffffd320) at gsignal.c:3300
#6  0x00007fffef50331f in g_signal_emit (instance=instance@entry=0x55555607af30, signal_id=<optimized out>, detail=detail@entry=0) at gsignal.c:3447
#7  0x00007ffff120ce14 in gtk_widget_realize (widget=widget@entry=0x55555607af30 [GtkSocket]) at gtkwidget.c:5456
#8  0x00007ffff1210608 in gtk_widget_set_parent (widget=0x55555607af30 [GtkSocket], parent=0x555556aa5390 [EphyWebView]) at gtkwidget.c:9568
#9  0x00007ffff1f2d644 in webkitWebViewBaseContainerAdd(GtkContainer*, GtkWidget*) (container=0x555556aa5390 [EphyWebView], widget=<optimized out>, widget@entry=0x55555607af30 [GtkSocket])
    at /usr/src/debug/webkitgtk-2.15.4/Source/WebKit2/UIProcess/API/gtk/WebKitWebViewBase.cpp:425
#10 0x00007fffef4ea5c0 in g_cclosure_marshal_VOID__OBJECTv (closure=0x5555557d6800, return_value=<optimized out>, instance=0x555556aa5390, args=<optimized out>, marshal_data=<optimized out>, n_params=<optimized out>, param_types=0x5555557d6970) at gmarshal.c:2102
#11 0x00007fffef4e7764 in _g_closure_invoke_va (closure=closure@entry=0x5555557d6800, return_value=return_value@entry=0x0, instance=instance@entry=0x555556aa5390, args=args@entry=0x7fffffffd770, n_params=<optimized out>, param_types=0x5555557d6970) at gclosure.c:867
#12 0x00007fffef502cb9 in g_signal_emit_valist (instance=0x555556aa5390, signal_id=<optimized out>, detail=0, var_args=var_args@entry=0x7fffffffd770) at gsignal.c:3300
#13 0x00007fffef50331f in g_signal_emit (instance=instance@entry=0x555556aa5390, signal_id=<optimized out>, detail=detail@entry=0) at gsignal.c:3447
#14 0x00007ffff0fe9e65 in gtk_container_add (container=0x555556aa5390 [EphyWebView], widget=0x55555607af30 [GtkSocket]) at gtkcontainer.c:1875
#15 0x00007ffff1f51633 in WebKit::WebPageProxy::createPluginContainer(unsigned long&) (this=this@entry=0x7fffe1886000, windowID=windowID@entry=@0x7fffffffd8f0: 0)
    at /usr/src/debug/webkitgtk-2.15.4/Source/WebKit2/UIProcess/gtk/WebPageProxyGtk.cpp:107
#16 0x00007ffff2053c22 in IPC::callMemberFunctionImpl<WebKit::WebPageProxy, void (WebKit::WebPageProxy::*)(unsigned long&), std::tuple<>, , std::tuple<unsigned long>, 0ul>(WebKit::WebPageProxy*, void (WebKit::WebPageProxy::*)(unsigned long&), std::tuple<>&&, std::tuple<unsigned long>&, std::integer_sequence<unsigned long>, std::integer_sequence<unsigned long, 0ul>) (args=<optimized out>, replyArgs=std::tuple containing = {...}, function=<optimized out>, object=0x7fffe1886000) at /usr/src/debug/webkitgtk-2.15.4/Source/WebKit2/Platform/IPC/HandleMessage.h:54
#17 0x00007ffff2053c22 in IPC::callMemberFunction<WebKit::WebPageProxy, void (WebKit::WebPageProxy::*)(unsigned long&), std::tuple<>, std::integer_sequence<unsigned long>, std::tuple<unsigned long>, std::integer_sequence<unsigned long, 0ul> >(std::tuple<>&&, std::tuple<unsigned long>&, WebKit::WebPageProxy*, void (WebKit::WebPageProxy::*)(unsigned long&)) (args=<optimized out>, function=<optimized out>, object=0x7fffe1886000, replyArgs=std::tuple containing = {...}) at /usr/src/debug/webkitgtk-2.15.4/Source/WebKit2/Platform/IPC/HandleMessage.h:60
#18 0x00007ffff2053c22 in IPC::handleMessage<Messages::WebPageProxy::CreatePluginContainer, WebKit::WebPageProxy, void (WebKit::WebPageProxy::*)(unsigned long&)>(IPC::Decoder&, IPC::Encoder&, WebKit::WebPageProxy*, void (WebKit::WebPageProxy::*)(unsigned long&)) (decoder=..., function=<optimized out>, object=0x7fffe1886000, replyEncoder=...)
    at /usr/src/debug/webkitgtk-2.15.4/Source/WebKit2/Platform/IPC/HandleMessage.h:139
#19 0x00007ffff2053c22 in WebKit::WebPageProxy::didReceiveSyncMessage(IPC::Connection&, IPC::Decoder&, std::unique_ptr<IPC::Encoder, std::default_delete<IPC::Encoder> >&) (this=0x7fffe1886000, connection=..., decoder=..., replyEncoder=std::unique_ptr<IPC::Encoder> containing 0x7fffe19e8780) at /usr/src/debug/webkitgtk-2.15.4/x86_64-redhat-linux-gnu/DerivedSources/WebKit2/WebPageProxyMessageReceiver.cpp:1575
#20 0x00007ffff1c994af in IPC::MessageReceiverMap::dispatchSyncMessage(IPC::Connection&, IPC::Decoder&, std::unique_ptr<IPC::Encoder, std::default_delete<IPC::Encoder> >&) (this=this@entry=0x7fffe19827b8, connection=..., decoder=..., replyEncoder=std::unique_ptr<IPC::Encoder> containing 0x7fffe19e8780) at /usr/src/debug/webkitgtk-2.15.4/Source/WebKit2/Platform/IPC/MessageReceiverMap.cpp:140
#21 0x00007ffff1cfc1b9 in WebKit::ChildProcessProxy::dispatchSyncMessage(IPC::Connection&, IPC::Decoder&, std::unique_ptr<IPC::Encoder, std::default_delete<IPC::Encoder> >&) (this=this@entry=0x7fffe1982780, connection=..., decoder=..., replyEncoder=std::unique_ptr<IPC::Encoder> containing 0x7fffe19e8780) at /usr/src/debug/webkitgtk-2.15.4/Source/WebKit2/UIProcess/ChildProcessProxy.cpp:157
#22 0x00007ffff1d51bcb in WebKit::WebProcessProxy::didReceiveSyncMessage(IPC::Connection&, IPC::Decoder&, std::unique_ptr<IPC::Encoder, std::default_delete<IPC::Encoder> >&) (this=
    0x7fffe1982780, connection=..., decoder=..., replyEncoder=std::unique_ptr<IPC::Encoder> containing 0x7fffe19e8780) at /usr/src/debug/webkitgtk-2.15.4/Source/WebKit2/UIProcess/WebProcessProxy.cpp:500
#23 0x00007ffff1c94f9b in IPC::Connection::dispatchSyncMessage(IPC::Decoder&) (this=0x7fffe19ec900, decoder=...) at /usr/src/debug/webkitgtk-2.15.4/Source/WebKit2/Platform/IPC/Connection.cpp:855
#24 0x00007ffff1c95065 in IPC::Connection::dispatchMessage(std::unique_ptr<IPC::Decoder, std::default_delete<IPC::Decoder> >) (this=0x7fffe19ec900, message=std::unique_ptr<IPC::Decoder> containing 0x7fffe18821e0) at /usr/src/debug/webkitgtk-2.15.4/Source/WebKit2/Platform/IPC/Connection.cpp:922
#25 0x00007ffff1c958e5 in IPC::Connection::dispatchOneMessage() (this=0x7fffe19ec900) at /usr/src/debug/webkitgtk-2.15.4/Source/WebKit2/Platform/IPC/Connection.cpp:955
#26 0x00007fffef2a64be in WTF::Function<void ()>::operator()() const (this=<synthetic pointer>) at /usr/src/debug/webkitgtk-2.15.4/Source/WTF/wtf/Function.h:50
#27 0x00007fffef2a64be in WTF::RunLoop::performWork() (this=0x7fffe19f7000) at /usr/src/debug/webkitgtk-2.15.4/Source/WTF/wtf/RunLoop.cpp:105
#28 0x00007fffef2ce839 in WTF::RunLoop::<lambda(gpointer)>::operator() (__closure=0x0, userData=<optimized out>) at /usr/src/debug/webkitgtk-2.15.4/Source/WTF/wtf/glib/RunLoopGLib.cpp:66
#29 0x00007fffef2ce839 in WTF::RunLoop::<lambda(gpointer)>::_FUN(gpointer) () at /usr/src/debug/webkitgtk-2.15.4/Source/WTF/wtf/glib/RunLoopGLib.cpp:68
#30 0x00007fffee259f22 in g_main_dispatch (context=0x555555790bc0) at gmain.c:3203
#31 0x00007fffee259f22 in g_main_context_dispatch (context=context@entry=0x555555790bc0) at gmain.c:3856
#32 0x00007fffee25a2a0 in g_main_context_iterate (context=context@entry=0x555555790bc0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at gmain.c:3929
#33 0x00007fffee25a34c in g_main_context_iteration (context=context@entry=0x555555790bc0, may_block=may_block@entry=1) at gmain.c:3990
#34 0x00007fffef7ce5dd in g_application_run (application=0x555555801190 [EphyShell], argc=1, argv=0x7fffffffde08) at gapplication.c:2381
#35 0x00005555555569c8 in main (argc=<optimized out>, argv=<optimized out>) at ephy-main.c:445