panic: ffs_blkfree: freeing free frag

[NAKAJI Hiroyuki]

I got same panic on my FreeBSD/pc98 -CURRENT box. Under following
situation.

1. Building new kernel and running Emacs on another vty, or
2. Running "portupgrade -a" and running Emacs on another vty

In both cases, access to my ~/Mail, i.e. /home partition, is resulting
into panic. Fortunately my $HOME is not corrupted yet. :)

Both kernels on Apr 28 2003 and May 1 2003 got the same panic, but the
kernel on Apr 12 2003 does not.
-- 
NAKAJI Hiroyuki