> >Build it with LOCKDEBUG, take pictures of the panic message/backtrace and
> >send a PR.
> >
> Screenshot is available at:
> http://aydogan.org/reboot/lockdebug_bt.png

As an FYI: if you

sysctl -w ddb.tee_msgbuf=1

everything you do in ddb will be saved in the dmesg buffer, which is
(usually) preserved across reboots. Quite handy.