#0  g_type_check_instance_cast (type_instance=0x3fe0000000000000, iface_type=546832872304) at ../../../../gobject/gtype.c:4052
  [Error: gtype.c was not found in source tree]
#1  0x00007feb5e5d369c in shell_gtk_embed_window_created_cb (display=0x7f51fd4000, window=0x7f528d07d0, embed=0x7f528d7720) at ../src/shell-gtk-embed.c:67
  62:                                    MetaWindow    *window,
  63:                                    ShellGtkEmbed *embed)
  64: {
  65:   ShellGtkEmbedPrivate *priv = shell_gtk_embed_get_instance_private (embed);
  66:   Window xwindow = meta_window_get_xwindow (window);
  67:   GdkWindow *gdk_window = gtk_widget_get_window (GTK_WIDGET (priv->window));
  68: 
  69:   if (gdk_window && xwindow == gdk_x11_window_get_xid (gdk_window))
  70:     {
  71:       ClutterActor *window_actor =
  72:         CLUTTER_ACTOR (meta_window_get_compositor_private (window));
#2  0x00007feb5dfd1f9d in g_closure_invoke (closure=0x7f549b9990, return_value=0x0, n_param_values=2, param_values=0x7ffe9b1c97b0, invocation_hint=0x7ffe9b1c9730) at ../../../../gobject/gclosure.c:804
  [Error: gclosure.c was not found in source tree]
#3  0x00007feb5dfe4d2e in signal_emit_unlocked_R (node=node@entry=0x7f51ce5660, detail=detail@entry=0, instance=instance@entry=0x7f51fd4000, emission_return=emission_return@entry=0x0, instance_and_params=instance_and_params@entry=0x7ffe9b1c97b0) at ../../../../gobject/gsignal.c:3635
  [Error: gsignal.c was not found in source tree]
#4  0x00007feb5dfed505 in g_signal_emit_valist (instance=0x7f51fd4000, signal_id=<optimized out>, detail=0, var_args=var_args@entry=0x7ffe9b1c9980) at ../../../../gobject/gsignal.c:3391
  [Error: gsignal.c was not found in source tree]
#5  0x00007feb5dfedf1f in g_signal_emit (instance=<optimized out>, signal_id=<optimized out>, detail=<optimized out>) at ../../../../gobject/gsignal.c:3447
  [Error: gsignal.c was not found in source tree]
#6  0x00007feb5c245723 in ?? ()
#7  0x0000007f51af9eb0 in ?? ()
#8  0x0000000000000000 in ?? ()