Jason R. Thorpe wrote:
 > 
 > this is pretty cool, but it breaks on systems that preserves the kernel 
 > message buffer across reboots (i.e. most ports :-)

Not to mention that it assumes you've booted /netbsd and not /onetbsd
for example or /netbsd.known.good.kernel.1.  Though arguably this is
something that should be fixed elsewhere.