only set fixed length for leaf types which have fixed length

diff --git a/src/lib/util/dict_validate.c b/src/lib/util/dict_validate.c
index aa891a90f72a6f05e98e62f1e61aae4e6762f027..4ff8ff0f9261913f52f04516dc3a4827d3203c1d 100644 (file)
--- a/src/lib/util/dict_validate.c
+++ b/src/lib/util/dict_validate.c
@@ -677,7 +677,7 @@ bool dict_attr_fields_valid(fr_dict_t *dict, fr_dict_attr_t const *parent,
        /*
         *      Initialize the length field, which is needed for the attr_valid() callback.
         */
-       if (!flags->length) {
+       if (!flags->length && fr_type_is_leaf(type) && !fr_type_is_variable_size(type)) {
                fr_value_box_t box;
 
                fr_value_box_init(&box, type, NULL, false);