Kernel panic in 5.99.24

[Martti Kuparinen <martti.kuparinen%iki.fi@localhost>]

With today's sources, I'm able to trigger a panic every time I execute these 
commands on NetBSD/amd64 5.99.24

ifconfig agr0 create
ifconfig agr0 agrport wm0
ifconfig agr0 agrport wm1
ifconfig agr0 agrport wm2
ifconfig agr0 agrport wm3
ifconfig agr0

agr0: flags=8842<BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
        capabilities=<...>
        enabled=0
        agrport: wm0, flags=0x0>
        agrport: wm1, flags=0x0>
        agrport: wm2, flags=0x0>
        agrport: wm3, flags=0x0>
        address: 00:15:17:c6:68:50

ifconfig agr0 192.168.1.1 netmask 255.255.255.0 up

Mutex error: mutex_vector_enter: locking against myself
...
panic: lock error
...

The USB keyboard didn't work so I was unable to get backtrace. And no, I don't 
have PS/2 keyboard...

Martti