Comment 2 for bug 676029

There's no need to add any more specific information. The bug's in the code in qemu.

net/vde.c:

static int net_vde_init(VLANState *vlan, const char *model,
                        const char *name, const char *sock,
                        int port, const char *group, int mode)
{
...
    vde = vde_open(init_sock, (char *)"QEMU", &args);
    if (!vde){
        return -1;
    }
...
}

There's no message generated there. Callers merely pass the failure up the road, where it's finally handled as exit(1). If _anything_ is wrong in vde_open() (which can fail due to variety of reasons, including wrong path to the listening socket and what not), nothing will indicate that, just a trivial, silent exit.