The patch for the net/minidlna port replaces read_random_bytes in uuid.c.  However, the while loop in the replaced function treats the size_t variable 'size' as signed, causing the while loop break condition to fail, which then causes a sigbus.

Fix: 

In uuid.c, replace:


read_random_bytes(unsigned char *buf, size_t size)
{
        long r;
        srandomdev();

        while (size > 0) {
                r = random();
                memcpy(buf, &r,
                    size > sizeof(r) ? sizeof(r) : size);
                buf += sizeof(r);
                size -= sizeof(r);
        }
}

with (note cast in while loop):


read_random_bytes(unsigned char *buf, size_t size)
{
        long r;
        srandomdev();

        while ((ssize_t)size > 0) {
                r = random();
                memcpy(buf, &r,
                    size > sizeof(r) ? sizeof(r) : size);
                buf += sizeof(r);
                size -= sizeof(r);
        }
}

Or, fix the buf and size arithmetic within the while loop to prevent 'size' from going below zero.
How-To-Repeat: Run minidlna port (possibly only happens on amd64 host).