Comment 2 for bug 870935

StacktraceTop:
 g_object_get_data (object=<optimized out>, key=0x7fa49865de1c "gtk-tree-row-refs") at /build/buildd/glib2.0-2.30.0/./gobject/gobject.c:2940
 gtk_tree_row_reference_free (reference=0x2655bb0) at /build/buildd/gtk+3.0-3.2.0/./gtk/gtktreemodel.c:2415
 garbage_collect_cell_data (data=0x1023c10) at /build/buildd/gtk+3.0-3.2.0/./gtk/a11y/gtktreeviewaccessible.c:2841
 idle_garbage_collect_cell_data (data=0x1023c10) at /build/buildd/gtk+3.0-3.2.0/./gtk/a11y/gtktreeviewaccessible.c:2863
 gdk_threads_dispatch (data=0x264b160) at /build/buildd/gtk+3.0-3.2.0/./gdk/gdk.c:754