+ /* In the (rather pointless) case where the dependent variable is
+ the independent variable, n_all_vars == 1.
+ However this would result in a buffer overflow so we must
+ over-allocate the space required in this malloc call.
+ See bug #58599 */
+ double *means = xnmalloc (n_all_vars <= 1 ? 2 : n_all_vars,
+ sizeof (*means));