Crash with "Invalid argument (session_base.cpp:538)"

[sublee]

I'm using libzmq-4.0.3 and "epgm://127.0.0.1;224.0.0.0:11042" as a ØMQ socket address. Yes, I know that localhost is not a good address to use PGM. Anyway, the application runs well for a few minutes but it crashes with the assertion failure soon:

Invalid argument (session_base.cpp:538)
Aborted (core dumped)

[hurtonm]

Thanks for the report. Going to look into this one.

[sublee]

Thanks!

[a5-pickle]

Hi. I've written a simple program in go that will produce this fault every time. Here is the code:

package main

import (
    "fmt"
    zmq "github.com/pebbe/zmq4"
)

func main() {
    context, _ := zmq.NewContext()
    socket, err := context.NewSocket(zmq.SUB)
    if err != nil {
        panic(err.Error())
    }   
    defer socket.Close()

    socket.Connect("epgm://10.1.22.101;239.20.20.101:40200")
    socket.SetSubscribe("")
    for {
        msg, _ := socket.Recv(0)
        fmt.Println(msg)
    }   

}

My python scripts that subscribe to the same channel do not produce this error. Not sure where to look... If needed, I can provide core files. Thanks.

[sigiesec]

The line causing the failing assertion is https://github.com/zeromq/zeromq4-x/blob/8b9a82476b196a200b9698c9345ae8ba50cccb1c/src/session_base.cpp#L538, corresponding to

libzmq/src/session_base.cpp

Line 650 in f6933f8

errno_assert (rc == 0);

in the current master

Since pgm_socket_t::init was not changed much in the last 7 years, except for #544, the issue probably still exists.

[bjovke]

@sigiesec @sublee Hm, how are we going to test this, test program is in "Go"? Can anyone convert this to C++?

[sigiesec]

@bjovke I already started converting this to a C++ test case.

[bjovke]

@sigiesec :)

[stale]

This issue has been automatically marked as stale because it has not had activity for 365 days. It will be closed if no further activity occurs within 56 days. Thank you for your contributions.