zeromq 3 pub leak

gistfile1.txt

#include <string.h>
#include <sys/time.h>
#include <unistd.h>

#include <zmq.h>

#define TOPIC "foobarfoobarfoobarfoobarfoobar"

int main (int argc, const char * argv[])
{
    void *ctx = zmq_init (1);
    
    void *pub = zmq_socket (ctx, ZMQ_PUB);
    zmq_bind (pub, "tcp://*:4711");
    
    void *sub = zmq_socket (ctx, ZMQ_XSUB);   
    zmq_connect (sub, "tcp://localhost:4711");
    
    sleep(1);
    
    for (long i = 0;;i++) {
        zmq_send(sub, "\1" TOPIC, strlen(TOPIC) + 1, 0);
        zmq_send(sub, "\0" TOPIC, strlen(TOPIC) + 1, 0);
        if (i % 100 == 0) {
            // trigger handling of subscriptions
            zmq_send(pub, "baz", 3, 0);
        }

        // avoid hitting hwm
        struct timespec t = { 0, 10000 };
        nanosleep(&t, NULL);        
    }
}