Hello,

I've been getting a lot of IPv6 related crashes with 2.0_BETA.  It usually
happens when I try to connect to a IPv6 enabled IRC server using irssi.  The
box crashes right when the IRC client attempts to connect to the IPv6 address.

I'm running:

NetBSD 2.0_BETA (GENERIC) #0: Tue Apr 27 10:30:15 UTC 2004 
autobuild@tgm.netbsd.org:/autobuild/netbsd-2-0/i386/OBJ/autobuild/netbsd-2-0/src/sys/arch/i386/compile/GENERIC
i386

Here is a backtrace:

(gdb) target kcore /var/crash/netbsd.6.core
panic: trap
#0  0x00000001 in ?? ()
(gdb) bt
#0  0x00000001 in ?? ()
#1  0xc03fd87b in cpu_reboot ()
#2  0xc0374688 in panic ()
#3  0xc0407ddd in trap ()
#4  0xc0102ebb in calltrap ()
#5  0xc0137860 in frpr_tcp6 ()
#6  0xc013bc3d in frpr_ipv6hdr ()
#7  0xc0137a61 in fr_makefrip ()
#8  0xc0152a45 in fr_checkicmp6matchingstate ()
#9  0xc0151968 in fr_stlookup ()
#10 0xc0151dc7 in fr_checkstate ()
#11 0xc01386e5 in fr_check ()
#12 0xc013d4bb in fr_check_wrapper6 ()
#13 0xc03c7c93 in pfil_run_hooks ()
#14 0xc015f39a in ip6_input ()
#15 0xc015f281 in ip6intr ()
#16 0xc0102b6d in Xsoftnet ()
(gdb)

Is anyone else having the same problem?  I'll submit a PR if I still see it a
few days later.