This has been requested in
https://bugzilla.gnome.org/show_bug.cgi?id=708206
* Most users will probably want to use gtk_builder_new_from_string().
*
* Upon errors 0 will be returned and @error will be assigned a
- * #GError from the #GTK_BUILDER_ERROR or #G_MARKUP_ERROR domain.
+ * #GError from the #GTK_BUILDER_ERROR, #G_MARKUP_ERROR or
+ * #G_VARIANT_PARSE_ERROR domain.
*
* It’s not really reasonable to attempt to handle failures of this
* call. The only reasonable thing to do when an error is detected is