Runs out of file handles

sockleak.c

//
//  Socket leak test case
//

#include "zhelpers.h"

int main () {
    void *context = zmq_init (1);
    
    //  Open socket, send message, close socket
    //  Repeat over and over
    while (1) {
        void *publisher = zmq_socket (context, ZMQ_PUB);
        zmq_bind (publisher, "tcp://*:5555");
        s_send (publisher, "Hello");
        zmq_close (publisher);
    }
    zmq_term (context);
    
    return 0;
}