[Bug-gsl] error ?

[Vander Alex]

code source:
#include <stdio.h>
#include <stdlib.h>
#include <gsl/gsl_combination.h>
#include <gsl/gsl_math.h>
#include <conio.h>

//-lgsl -lgslcblas
//LINKER
//LIGSL.DLL IN LIB

int 
main (void) 
{
  gsl_combination * c;
  size_t i;

  printf("all subsets of {0,1,2,3} by size in lex. order\n") ;
  for(i = 0; i <= 4; i++)
    {
      c = gsl_combination_calloc (4, i);
      do
        {
          printf("{");
          gsl_combination_fprintf (stdout, c, " %u");
          printf(" }\n");
        }
      while (gsl_combination_next(c) == GSL_SUCCESS);
      gsl_combination_free(c);
    }

getch();
  return 0;
}



output :
all subsets of {0,1,2,3} by size in lex. order
{ }
{ 0 }
{ 1 }
{ 2 }
{ 3 }
{ 0 1 }
{ 0 2 }
{ 0 3 }
{ 1 2 }
{ 1 3 }
{ 2 3 }
{ 0 1 2 }
{ 0 1 3 }
{ 0 2 3 }
{ 1 2 3 }
{ 0 1 2 3 }

where si { 0 1 3 2 } fro example ?????????
this is a bug ?