Comment 2 for bug 729722

StacktraceTop:
 g_variant_is_trusted (value=0x0) at /build/buildd/glib2.0-2.28.1/./glib/gvariant-core.c:600
 g_variant_builder_add_value (builder=0x7fff82f892a0, value=0x0) at /build/buildd/glib2.0-2.28.1/./glib/gvariant.c:3081
 update_layout (client=0x1e7b5c0) at /build/buildd/libdbusmenu-0.3.100/./libdbusmenu-glib/client.c:1848
 menuproxy_build_cb (object=<value optimized out>, res=<value optimized out>, user_data=<value optimized out>) at /build/buildd/libdbusmenu-0.3.100/./libdbusmenu-glib/client.c:1075
 complete_in_idle_cb (data=<value optimized out>) at /build/buildd/glib2.0-2.28.1/./gio/gsimpleasyncresult.c:757