zmq_ctx_term hangs if data is sent but connect never succeeds regardless of ZMQ_LINGER

[cxreg]

According to the documentation, if ZMQ_LINGER is set to 0 then zmq_ctx_term will not block if there is pending sends. However, this doesn't seem to work if the connection never succeeded. This snippet reproduces the behavior. It is worth noting that if the connect ever succeeded (even if it is disconnected at the time of close and term) it will not hang. This only happens if the connect never succeeded.

I'm not sure if this is related to #1279 so I opened this as a new ticket. If they are related, please merge as needed

#include <zmq.h>

char buf[1024] = {0};

int main(void) {
    void *ctx = zmq_ctx_new();
    void *sock = zmq_socket (ctx, ZMQ_PUSH);
    zmq_setsockopt(sock, ZMQ_LINGER, 0, 0);
    zmq_connect(sock, "tcp://localhost:9999");
    zmq_send(sock, buf, 1024, 0);
    zmq_close(sock);
    printf("destroying zmq ctx\n");
    zmq_ctx_term(ctx);
    printf("finished\n");
}

[cxreg]

Nevermind this is user error, I misunderstood the api for zmq_setsockopt. If I pass a pointer to an integer with the value of 0 then it works as documented. Sorry for the noise.