It appears the problem is in this function:

int net_connect_unix(const char *path) { struct sockaddr_un sa; int fd, ret;

    memset(&sa, 0, sizeof(sa));
    sa.sun_family = AF_UNIX;
    if (strocpy(sa.sun_path, path, sizeof(sa.sun_path)) < 0) {
            /* too long path */
            errno = EINVAL;
            return -1;
    }

    /* create the socket */
    fd = socket(PF_UNIX, SOCK_STREAM, 0);
    if (fd == -1) {
            i_error("socket(%s) failed: %m", path);
            return -1;
    }

    net_set_nonblock(fd, TRUE);

    /* connect */
    ret = connect(fd, (void *)&sa, sizeof(sa));
    if (ret < 0 && errno != EINPROGRESS) {
            close_keep_errno(fd);
            return -1;
    }

    return fd;

}

This function is returning -1 and the server is crashing - Most likely because of a socket error.

The error message from the socket is "Resource temporarily unavailable"

If anybody knows why that would happen, I might be able figure out a solution.

Thanks!