hashtab_insert
rc = hashtab_insert(&p->range_tr, rt, r, rangetr_key_params);
rc = hashtab_insert(&p->filename_trans, ft, datum,
rc = hashtab_insert(&p->filename_trans, ft, first,
rc = hashtab_insert(&p->role_tr, rtk, rtd, roletr_key_params);
return hashtab_insert(&s->table, name, datum, symtab_key_params);