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Hello!

I've found this behaviour in gstreamer_rtsp_server::RTSPServer that has been happening for some time in my computer, but only now I've found some time to write a proper issue.

Whenever there is at least one client connected, calling RTSPServer::client_filter like...

rtsp_server.client_filter(Some(&mut |_, _| RTSPFilterResult::Remove));

...will make the program hang or crash.

Many different error messages appear, but the one I've been getting with the example that I'm attaching below is malloc(): unsorted double linked list corrupted.

The steps to reproduce this error are the following:

• Run the snippet attached below;
• Connect to the RTSP server that the snippet makes available with gst-launch-1.0 rtspsrc location="rtsp://0.0.0.0:8554/stream" user-id="" user-pw="" ! rtph264depay ! avdec_h264 ! autovideosink;
• Eventually the snippet will raise an error.

Is there something that I should be doing differently?

---

Obs.: The problem persists even when I remove the factory before removing the clients, inside the loop.

Obs.: This snippet was based on this test.

---

use gstreamer_rtsp_server::prelude::*;

use {
    glib::{MainContext, MainLoop},
    gstreamer_rtsp_server::{RTSPFilterResult, RTSPMediaFactory, RTSPServer},
    std::{thread, time::Duration},
};

fn main() {
    gstreamer::init().unwrap();

    let main_context = MainContext::new();
    let main_loop = MainLoop::new(Some(&main_context), false);

    let rtsp_server = RTSPServer::new();
    rtsp_server.set_service("8554");

    let source_id = rtsp_server.attach(Some(&main_context));

    thread::spawn({
        let main_loop = main_loop.clone();

        move || {
            main_loop.run();

            main_context
                .find_source_by_id(&source_id)
                .unwrap()
                .destroy();
        }
    });

    while let false = main_loop.is_running() {
        thread::sleep(Duration::from_millis(100));
    }

    let launch = concat!(
        "videotestsrc is-live=true ! ",
        "video/x-raw,width=640,height=480 ! ",
        "x264enc key-int-max=40 ! ",
        "rtph264pay name=pay0",
    );

    let media_factory = RTSPMediaFactory::new();
    media_factory.set_launch(launch);
    media_factory.set_shared(true);

    rtsp_server
        .get_mount_points()
        .unwrap()
        .add_factory("/stream", &media_factory);

    println!(
        "RTSP server is running on rtsp://{}:{}/stream",
        rtsp_server.get_address().unwrap(),
        rtsp_server.get_bound_port()
    );

    for index in 1.. {
        println!("Removing clients for the [{}]th time", index);

        rtsp_server.client_filter(Some(&mut |_, _| RTSPFilterResult::Remove));
        thread::sleep(Duration::from_secs(10));
    }
}