SHA512 hash function crashing

[Jon Buller <jon%bullers.net@localhost>]

Has anyone else seen this?  If it's a known problem, or someone already
has a patch, I don't want to waste too much time on it.  However, it
happens when running a -current release either built native or cross
built from a NetBSD/amd64 system.

Since it doesn't seem to happen on the amd64 box, I'm a bit suspicious
of the GCC optimizer...

Sunergy# uname -a
NetBSD Sunergy.Bullers.Net 5.99.15 NetBSD 5.99.15 (GENERIC) #1: Thu Jul 
30 11:23:11 PDT 2009 
jon%xw8200.Bullers.Net@localhost:/home/netbsd-current/usr/obj/sparc/sys/arch/sparc/compile/GENERIC 
sparc
Sunergy# gdb /usr/sbin/pkg_admin ./pkg_admin.core
GNU gdb 6.5
Copyright (C) 2006 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain 
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Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured as "sparc--netbsdelf"...(no debugging symbols found)

Reading symbols from /usr/lib/libtermcap.so.0...(no debugging symbols 
found)...done.

[ snip... ]

Reading symbols from /usr/libexec/ld.elf_so...
(no debugging symbols found)...done.
Loaded symbols for /usr/libexec/ld.elf_so
Core was generated by `pkg_admin'.
Program terminated with signal 10, Bus error.
#0  0x20398ac0 in _SHA512_Final () from /usr/lib/libc.so.12
(gdb) where
#0  0x20398ac0 in _SHA512_Final () from /usr/lib/libc.so.12
#1  0x000154e8 in free_pkg_vulnerabilities ()
#2  0x00015dc4 in parse_pkg_vulnerabilities ()
#3  0x0001337c in fetch_pkg_vulnerabilities ()
#4  0x00014f88 in main ()
(gdb)