Comment 2 for bug 1105440

StacktraceTop:
 g_variant_is_trusted (value=value@entry=0x0) at /build/buildd/glib2.0-2.35.4/./glib/gvariant-core.c:609
 g_variant_builder_add_value (builder=builder@entry=0x7fffba5c7620, value=0x0) at /build/buildd/glib2.0-2.35.4/./glib/gvariant.c:3400
 g_variant_valist_new (str=str@entry=0x7fffba5c76d8, app=app@entry=0x7fffba5c7708) at /build/buildd/glib2.0-2.35.4/./glib/gvariant.c:4545
 g_variant_new_va (format_string=0x40b5dc "s)", endptr=0x0, app=0x7fffba5c7708) at /build/buildd/glib2.0-2.35.4/./glib/gvariant.c:4702
 g_variant_new (format_string=0x40b5d7 "(s^ass)") at /build/buildd/glib2.0-2.35.4/./glib/gvariant.c:4641