VM Konfig mismatches when -readconfig option is used

[Bjoern Bornemann]

Since qemu is able to write / read config files, i thought it might be cool to use this.
BUT:

qemu allways adds an default network interface, when i use the -readconfig option.

Till now, i start my VM like this (all variables are defined and working well in this script)

/opt/bin/qemu-system-x86_64 \
 -m 512M \
 -vga vmware \
 -name ${VMname} \
 -display sdl,window_close=off,ctrl_grab=on \
 -machine q35,accel=kvm -enable-kvm \
 -drive file=./${SystemHDDname}.hdd,index=0,if=virtio,media=disk \
 -drive file="${ISOfile}",index=2,if=virtio,media=cdrom \
 -boot menu=on,once=d \
 -net nic,vlan=0,model=virtio,macaddr=52:54:00:6D:AA:0C,name=uplink \
 -net user,vlan=0,name=VLANextern,net=192.168.42.0/24 \
 -usbdevice tablet \
 -balloon virtio \
 -net nic,vlan=238,model=virtio,macaddr=52:54:00:6D:AA:0D \
 -net vde,vlan=238,name=VLANintern,sock=${VDEsocket} \
 -rtc base=utc,clock=host \
 -writeconfig ./${VMname}.qemu

the monitor tells me:
QEMU 2.2.90 monitor - type 'help' for more information
(qemu) info network
hub 238
 \ hub238port1: VLANintern: index=0,type=vde,sock=/media/daten/vm/vde/test.virtuell.zh3,fd=9
 \ hub238port0: virtio-net-pci.1: index=0,type=nic,model=virtio-net-pci,macaddr=52:54:00:6d:aa:0d
hub 0
 \ hub0port1: VLANextern: index=0,type=user,net=192.168.42.0,restrict=off
 \ hub0port0: virtio-net-pci.0: index=0,type=nic,model=virtio-net-pci,macaddr=52:54:00:6d:aa:0c

which is perfectly correct.

and now the result for qemu-system-x86_64 -readconfig ./${VMname}.qemu:

QEMU 2.2.90 monitor - type 'help' for more information
(qemu) info network
hub 238
 \ hub238port1: VLANintern: index=0,type=vde,sock=/media/daten/vm/vde/test.virtuell.zh3,fd=9
 \ hub238port0: virtio-net-pci.1: index=0,type=nic,model=virtio-net-pci,macaddr=52:54:00:6d:aa:0d
hub 0
 \ hub0port3: user.1: index=0,type=user,net=10.0.2.0,restrict=off
 \ hub0port2: e1000.0: index=0,type=nic,model=e1000,macaddr=52:54:00:12:34:56
 \ hub0port1: VLANextern: index=0,type=user,net=192.168.42.0,restrict=off
 \ hub0port0: virtio-net-pci.0: index=0,type=nic,model=virtio-net-pci,macaddr=52:54:00:6d:aa:0c

Is it a bug or just misconfigured?

Thanks in advance.

BorneBjoern