#0  0x00365f57 in g_variant_is_trusted (value=0x0)
    at /build/buildd/glib2.0-2.28.0/glib/gvariant-core.c:363
No locals.
#1  0x00363810 in g_variant_builder_add_value (builder=0xbfb40f00, value=0x0)
    at /build/buildd/glib2.0-2.28.0/glib/gvariant.c:684
	__PRETTY_FUNCTION__ = "g_variant_builder_add_value"
#2  0x00000000 in ?? ()
No symbol table info available.