portupgrade of portupgrade broke portupgrade

[Jakob Breivik Grimstveit]

After just recently having performed a portupgrade of portupgrade, the
following happens (I guess I have a problem :-( ):

[jakobbg at bgjgrimstveit jakobbg]# portupgrade --version
portupgrade 1.8.1
[jakobbg at bgjgrimstveit jakobbg]# sudo portupgrade -aRru
/usr/local/lib/ruby/site_ruby/1.8/portinfo.rb:23:in `initialize': Port
info line must consist of 10 fields. (ArgumentError)
        from /usr/local/lib/ruby/site_ruby/1.8/portsdb.rb:642:in `new'
        from /usr/local/lib/ruby/site_ruby/1.8/portsdb.rb:642:in `port'
        from /usr/local/lib/ruby/site_ruby/1.8/portsdb.rb:639:in `port'
        from /usr/local/lib/ruby/site_ruby/1.8/portsdb.rb:653:in
`origin'
        from /usr/local/lib/ruby/site_ruby/1.8/portsdb.rb:823:in
`all_depends_list'
        from /usr/local/lib/ruby/site_ruby/1.8/portsdb.rb:823:in `map'
        from /usr/local/lib/ruby/site_ruby/1.8/portsdb.rb:823:in
`all_depends_list'
        from /usr/local/lib/ruby/site_ruby/1.8/pkgdb.rb:915: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:1845

How can I resolve this issue?