portsdb -Uu results in coredump

[Sahil Tandon]

After a cvsup yesterday, I get this after trying to portsdb -Uu:

Updating the ports index ... Generating INDEX.tmp - please wait.. Done.
done
[Updating the portsdb <format:bdb1_btree> in /usr/ports ... - 11736 port 
entries found 
.........1000.........2000.........3000.........4000.........5000.........6000.........7000.........8000..../usr/local/lib/ruby/site_ruby/1.8/portsdb.rb:587: 
[BUG] Bus Error
ruby 1.8.2 (2004-07-29) [i386-freebsd4]

I tried removing the ports directory and rebuilding (cvsup'ing) 
entirely, but the error remains.  What's the problem?