portupgrade make error...

[Choe, Cheng-Dae]

When updating ports by portupgrade. It make some error

[Updating the pkgdb <format:bdb1_btree> in /var/db/pkg ... - 208
packages found (-2 +2) (...)[Updating the pkgdb <format:bdb1_btree> in
/var/db/pkg ... - 208 packages found (-2 +2)
(...)/usr/local/lib/ruby/site_ruby/1.8/pkgdb.rb:239:in `origin':
private method `split' called for nil:NilClass: Cannot update the
pkgdb!] (PkgDB::DBError)
       from /usr/local/lib/ruby/site_ruby/1.8/pkginfo.rb:178:in `origin'
       from /usr/local/lib/ruby/site_ruby/1.8/pkgdb.rb:913:in `tsort_build'
       from /usr/local/lib/ruby/site_ruby/1.8/pkgdb.rb:907:in `each'
       from /usr/local/lib/ruby/site_ruby/1.8/pkgdb.rb:907:in `tsort_build'
       from /usr/local/lib/ruby/site_ruby/1.8/pkgdb.rb:929:in `sort_build'
       from /usr/local/lib/ruby/site_ruby/1.8/pkgdb.rb:933:in `sort_build!'
       from /usr/local/sbin/portupgrade:674:in `main'
       from /usr/local/sbin/portupgrade:207:in `initialize'
       from /usr/local/sbin/portupgrade:207:in `new'
       from /usr/local/sbin/portupgrade:207:in `main'
       from /usr/local/sbin/portupgrade:1869

portupgrade package versions are liles below
$ pkg_info | egrep "portupgrade|ruby"
portupgrade-20041226_1 FreeBSD ports/packages administration and
management tool s
ruby-1.8.2_3        An object-oriented interpreted scripting language
ruby18-bdb1-0.2.2   Ruby interface to Berkeley DB revision 1.8x with full featu

portupgrade has problem?
-- 
Choe, Cheng-Dae(최정대)
Blog: http://www.comdongin.com/