current kernel crashes while building userland

[Riccardo Mottola <riccardo.mottola%libero.it@localhost>]

Hi,

I upgraded to 9.99.17 22nd October. I built kernel + modules, rebooted.
on amd64

Then I started a distribution build... and after some hours, the machine 
resets.
I restarted again (without doing an update build)... and it reboots again.

I just find the machine rebooted, I can't read any message.

in /var/crash however I find the two gzipped files, too big to post 
public here. Each crash has its own.

Can I send them somebody? How can I give more information?

This machine is running netbsd current since a long time and has always 
been very stable (many other issues, but never reboots during builds)


Riccardo