Reproducable kernel crash

[Martin Husemann <martin%duskware.de@localhost>]

I would like to point out that

        https://gnats.NetBSD.org/57839
        
has a trivial reproducer for a kernel panic (no compiling needed) and this
prevents all automatic testing of VAX (which certainly will find tons of
more problems).

Would be great if someone could have a look at this.

Martin