On current or stable/13 with INVARIANTS, force a virtual host to be **master** from **backup** by `ifconfig vhid 100 state master`.
stable/12 is not affected.
```
#!/bin/sh
kldload -nq carp
ep=$( ifconfig epair create inet 192.168.1.1/24 )
ifconfig $ep vhid 100 advskew 100 192.168.1.100/32 alias
ifconfig $ep vhid 100 state backup
# The following will triggers assertion panic without the fix
ifconfig $ep vhid 100 state master
sleep 0.5
ifconfig $ep destroy
```