Unable to configure lagg interface with existing interfaces up and running

[dmalloc]

On 8.0.4-RC1 it is impossible to configure a lagg device when the network interfaces you are trying to use are already assigned to the network. As much as I understand the technical concept behind that for an administrative perspective that makes things awkward. You should be able to still configure lagg on those devices.

The physical NICs do not show up in the list of possible devices (see screen shot)

ifconfig
ale0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
	options=c319a<TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,TSO4,WOL_MCAST,
WOL_MAGIC,VLAN_HWTSO,LINKSTATE>
	ether 00:22:15:da:c2:ed
	inet6 fe80::222:15ff:feda:c2ed%ale0 prefixlen 64 scopeid 0x1 
	inet 192.168.1.10 netmask 0xffffff00 broadcast 192.168.1.255
	inet6 2001:470:1f15:120:222:15ff:feda:c2ed prefixlen 64 autoconf 
	nd6 options=3<PERFORMNUD,ACCEPT_RTADV>
	media: Ethernet autoselect (1000baseT <full-duplex>)
	status: active
em0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
	options=209b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,WOL_MAGIC>
	ether 00:1b:21:2f:e4:11
	inet6 fe80::21b:21ff:fe2f:e411%em0 prefixlen 64 scopeid 0x2 
	inet 192.168.1.40 netmask 0xffffff00 broadcast 192.168.1.255
	inet6 2001:470:1f15:120:21b:21ff:fe2f:e411 prefixlen 64 autoconf 
	nd6 options=3<PERFORMNUD,ACCEPT_RTADV>
	media: Ethernet autoselect (1000baseT <full-duplex>)
	status: active
lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> metric 0 mtu 16384
	options=3<RXCSUM,TXCSUM>
	inet6 ::1 prefixlen 128 
	inet6 fe80::1%lo0 prefixlen 64 scopeid 0x3 
	inet 127.0.0.1 netmask 0xff000000 
	nd6 options=3<PERFORMNUD,ACCEPT_RTADV>