#include <mpi.h>
int main(int argc, char *argv[]) {
  MPI_Comm comm;
  MPI_Init(0,0);
  MPI_Comm_dup(MPI_COMM_SELF,&comm);
  MPI_Comm_set_info(comm,MPI_INFO_NULL);
  MPI_Comm_free(&comm);
  MPI_Finalize();
}