wait_any return with -1

[florian <boost_error_wait88@…>]

I have a small example, where every process send his rank to rank 0. The process with rank 0, should receive with irecv every message and wait for it with wait_any. But the wait_any function returns with -1. I have seen two other tickets, which are marked as fixed/ solved. I think they are not solved. If they are solve the documentation should be changed, because if I make the same example with MPI_Waitany, the result is completely different.

#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <boost/mpi.hpp>
#include <iostream>
#include <string>
#include <boost/serialization/string.hpp>
#define MAXPROC 16    /* Max number of procsses */

int main(int argc, char* argv[]) {
  int i, np, me, index;
  const int tag  = 42;    /* Tag value for communication */
  const int root = 0;     /* Root process in broadcast */

  boost::mpi::status status;              /* Status object for non-blocing receive */
  boost::mpi::request recv_req[MAXPROC];  /* Request objects for non-blocking receive */
  
  int myname[5];             /* Local host name string */
  int hostname[5];  /* Received host names */
  int namelen;

  boost::mpi::environment env;                /* Initialize MPI */
  boost::mpi::communicator world;                /* Initialize MPI */
  np = world.size();    /* Get nr of processes */
  me = world.rank();    /* Get own identifier */
  

  if (me == 0) {    /* Process 0 does this */
	
	    std::cout <<"Process " << me << " broadcasting to all processes\n";
		boost::mpi::broadcast(world, me, 0);
	
	    std::cout <<"Process " << me<< " receiving from all other processes\n";
	    for (i=1; i<np; i++) {
		recv_req[i] = world.irecv(i,i,hostname[i]);
	    }
	
	    for (i=1; i<np; i++) {
	
		status = wait_any(recv_req,recv_req +5 ).first; 
	      std::cout<<"Received a message from process "<< status.source() << " tag " << status.tag() << std::endl;
	    }
	    std::cout <<"Ready\n";
	
  } 
	else { 
    int y;  

	boost::mpi::broadcast(world, y, 0);
	sleep(me%3+1);  

	MPI_Send (myname, namelen, MPI_CHAR, 0, tag, world);

  }
	world.barrier();
	
	~world;
	return 0;
}