Comment 3 for bug 1058620

StacktraceTop:
 g_variant_type_info_check (info=info@entry=0x7f7900000000, container_class=container_class@entry=0 '\000') at /build/buildd/glib2.0-2.34.0/./glib/gvarianttypeinfo.c:164
 g_variant_type_info_get_type_string (info=0x7f7900000000) at /build/buildd/glib2.0-2.34.0/./glib/gvarianttypeinfo.c:200
 g_variant_get_type_string (value=value@entry=0x7f79e0009ac0) at /build/buildd/glib2.0-2.34.0/./glib/gvariant.c:2023
 append_value_to_blob (value=value@entry=0x7f79e000f030, type=0x7f79f3528548, mos=mos@entry=0x26f7040, dos=dos@entry=0x2759120, out_padding_added=out_padding_added@entry=0x0, error=error@entry=0x7ffffc0ee9b8) at /build/buildd/glib2.0-2.34.0/./gio/gdbusmessage.c:2134
 append_value_to_blob (value=value@entry=0x7f79e000bec0, type=<optimized out>, mos=mos@entry=0x26f7040, dos=dos@entry=0x2759120, out_padding_added=out_padding_added@entry=0x7ffffc0ee5a8, error=error@entry=0x7ffffc0ee9b8) at /build/buildd/glib2.0-2.34.0/./gio/gdbusmessage.c:2113