nbpax was core dumped when making binary/sets/kern-GENERIC.tgz.

source is cvs co -D 2002-01-31-UTC.
host is i386, target is hpcmips.

here is another example:
% gdb /home/tools/bin/nbpax
GNU gdb 5.0nb1
Copyright 2000 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 conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured as "i386--netbsdelf"...(no debugging symbols found)...
(gdb) run -zwf /tmp/X /var/log/messages
Starting program: /home/tools/bin/nbpax -zwf /tmp/X /var/log/messages
(no debugging symbols found)...(no debugging symbols found)...
pax: Removing leading / from absolute path names in the archive
(no debugging symbols found)...(no debugging symbols found)...
Program received signal SIGSEGV, Segmentation fault.
0x805a060 in user_from_uid ()
(gdb) bt
#0  0x805a060 in user_from_uid ()
#1  0x8056c01 in ustar_wr ()
#2  0x804c54a in wr_archive ()
#3  0x804c8ee in archive ()
#4  0x8053f05 in main ()
#5  0x804a040 in ___start ()

-- 
FUKAUMI Naoki