value_clone (value, &o->value, width);
cats[a][a_idx] = ctables_categories_match (categories, value, var);
assert (cats[a][a_idx] != NULL);
value_clone (value, &o->value, width);
cats[a][a_idx] = ctables_categories_match (categories, value, var);
assert (cats[a][a_idx] != NULL);