Comment 2 for bug 1338804

StacktraceTop:
 g_object_unref (_object=0x324f760) at /build/buildd/glib2.0-2.41.1/./gobject/gobject.c:3092
 rb_browser_source_dispose (object=0x21d83d0) at rb-browser-source.c:211
 g_object_run_dispose (object=0x21d83d0) at /build/buildd/glib2.0-2.41.1/./gobject/gobject.c:1076
 gtk_notebook_forall (container=<optimized out>, include_internals=0, callback=0x7fb9603942f0 <gtk_widget_destroy>, callback_data=0x0) at /build/buildd/gtk+3.0-3.12.2/./gtk/gtknotebook.c:4562
 gtk_container_destroy (widget=0x1fcd430) at /build/buildd/gtk+3.0-3.12.2/./gtk/gtkcontainer.c:1412