Crash on port-amd64

[Paul Goyette <paul%whooppee.com@localhost>]

This is with a up-to-date kernel (sources updated via CVS about 8 hours 
ago).

While I had a './build.sh release' running, I got the following console 
output:

kernel: page fault trap, code=0
Stopped in pid 11487.1 (cc1) at netbsd:kauth_authorize_action + 0x0a: 
call *0(%rbx)


There was a db prompt printed, too, but the keyboard (USB attached) was 
unresponsive, so I couldn't do any further debugging;  nor could I force 
a crash dump.

On reboot, fsck failed in Phase 2 (Checking pathnames) with a corrupted 
directory - no '.' or '..' on inode 186117.  And after "repairing" that, 
it found lots (hundreds?) of unref'd directories and files.

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