virtual: 0.825
PID: 0.799
peripherals: 0.785
network: 0.772
ppc: 0.751
kernel: 0.708
device: 0.688
graphic: 0.682
socket: 0.679
arm: 0.659
hypervisor: 0.653
files: 0.651
performance: 0.596
debug: 0.596
boot: 0.568
architecture: 0.564
register: 0.562
vnc: 0.548
KVM: 0.539
permissions: 0.529
TCG: 0.522
risc-v: 0.507
i386: 0.494
VMM: 0.489
semantic: 0.435
user-level: 0.420
mistranslation: 0.340
x86: 0.276
assembly: 0.247

spice-qemu-char.c Assert

spice-qemu-char.c:173: spice_chr_add_watch: Assertion `cond == G_IO_OUT' failed.
I trace the code virtio-console.c:
ret = qemu_chr_fe_write(vcon->chr, buf, len);
    trace_virtio_console_flush_buf(port->id, len, ret);

    if (ret < len) {
        VirtIOSerialPortClass *k = VIRTIO_SERIAL_PORT_GET_CLASS(port);

        /*
         * Ideally we'd get a better error code than just -1, but
         * that's what the chardev interface gives us right now.  If
         * we had a finer-grained message, like -EPIPE, we could close
         * this connection.
         */
        if (ret < 0)
            ret = 0;
        if (!k->is_console) {
            virtio_serial_throttle_port(port, true);
            if (!vcon->watch) {
                vcon->watch = qemu_chr_fe_add_watch(vcon->chr,
                                                    G_IO_OUT|G_IO_HUP,
                                                    chr_write_unblocked, vcon);
            }
        }
    }
and spice-qemu-char.c in function:spice_chr_add_watch
assert(cond == G_IO_OUT);
so run in this code,will trigger this assert.

My qemu version is 2.3.0 and spice-server version is 0.12.5

called param is G_IO_OUT|G_IO_HUP,but assert (cond == G_IO_OUT)

I think this is fixed by:

commit f7a8beb5e6a13dc924895244777d9ef08b23b367
Author: Marc-André Lureau <email address hidden>
Date:   Thu May 28 15:04:58 2015 +0200

    spice: fix spice_chr_add_watch() pre-condition
    
    Since e02bc6de30c44fd668dc0d6e1cd1804f2eed3ed3, add_watch() is called
    with G_IO_HUP. Even if spice-qemu-char ignores this flag, the
    precondition must be changed.
    
    https://bugzilla.redhat.com/show_bug.cgi?id=1128992

Which is in 2.4.0