- out->n_subscripts = vm->n_subscripts;
- out->subscripts = xnmalloc (vm->n_subscripts,
- sizeof *out->subscripts);
+ struct pivot_value_ex *ex = pivot_value_ex_rw (out);
+ ex->n_subscripts = vm->n_subscripts;
+ ex->subscripts = xnmalloc (vm->n_subscripts, sizeof *ex->subscripts);