Pnic occurred prior to mounting file systems; I was able to boot
from the r320827 (as "kernel.old") OK.  I was not able to get a
dump.  Both the laptop and the build machine panicked, but the build
machine's keyboard was unresponsive and its serial console isn't
funtioning at the moment (because of unrelated issues involving the
machine to which said console is connected).

The laptop doesn't have a serial console, but its keyboard was working.

I grabbed a few screenshots; for the build machine, there's just the
one, but for the laptop, I managed to get a backtrace and 6 screenshots
(including the backtrace).

Please see <http://www.catwhisker.org/~david/FreeBSD/head/r320869/> for
the screenshots:

Index of /~david/FreeBSD/head/r320869

Icon  Name                    Last modified      Size
Description[PARENTDIR] Parent Directory                             -   
[IMG] freebeast_1.jpg         2017-07-10 11:36  260K  
[IMG] laptop_1.jpg            2017-07-10 11:36  253K  
[IMG] laptop_2.jpg            2017-07-10 11:36  242K  
[IMG] laptop_3.jpg            2017-07-10 11:36  259K  
[IMG] laptop_4.jpg            2017-07-10 11:36  245K  
[IMG] laptop_5.jpg            2017-07-10 11:36  158K  
[IMG] laptop_6.jpg            2017-07-10 11:36  140K  


Also, I have links to yesterday's verbose dmesg.boot files for each
machine at <http://www.catwhisker.org/~david/FreeBSD/history/>.

I'm happy to experiment....

Peace,
david
-- 
David H. Wolfskill                              da...@catwhisker.org
POTUS impeachment requires Congress buy-in.  First, fix Congress, THEN impeach.

See http://www.catwhisker.org/~david/publickey.gpg for my public key.

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