nanomsg large message problem on Ubuntu 12.04

gistfile1.c

#include <stdio.h>

#include "nanomsg/nn.h"
#include "nanomsg/reqrep.h"

// On Ubuntu 12.04, the final lines printed by the server are all 0 (or quite possibly garbage) instead 
// of cycling through numbers 0 to 126. For smaller values of N there is no problem. The Vagrantfile in
// https://github.com/mhowlett/NNanomsg should produce an environment in which this happens.

// Under Windows I think there is no problem (based on running a more complex application on both platforms).

// The problem seems to occur with the current master as well as v0.1


int main(int argc, char **argv)
{
  char *address = "tcp://127.0.0.1:5115";

  const int N = 127000;
  int i;
  int rc;

  if (argv[1][0] == 'c')
  {
    int req = nn_socket(AF_SP, NN_REQ);
    nn_connect(req, address);

    char buf[N];
    for (i=0; i<N; ++i)
    {
      buf[i] = (char)(i%127);
    }

    rc = nn_send(req, buf, N, 0);
    if (rc < 0)
    {
      perror(NULL);
    }

    sleep(10000);
  }
  else if (argv[1][0] == 's')
  {
    int rep = nn_socket(AF_SP, NN_REP);
    nn_bind(rep, address);
    char *data;

    rc = nn_recv(rep, &data, NN_MSG, 0);
    if (rc < 0)
    {
      perror(NULL);
    }
    else
    {
      for (i=0; i<N; ++i)
      {
        printf("%d\n", data[i]);
      }
      printf("# bytes: %d\n", rc);
    }
  }

}