akira@akira-desktop:~$ ri File
/usr/local/lib/ruby/site_ruby/1.8/rubygems.rb:578:in `report_activate_error': Could not find RubyGem hoe (>= 1.7.0) (Gem::LoadError)
	from /usr/local/lib/ruby/site_ruby/1.8/rubygems.rb:134:in `activate'
	from /usr/local/lib/ruby/site_ruby/1.8/rubygems.rb:158:in `activate'
	from /usr/local/lib/ruby/site_ruby/1.8/rubygems.rb:157:in `each'
	from /usr/local/lib/ruby/site_ruby/1.8/rubygems.rb:157:in `activate'
	from /usr/local/lib/ruby/site_ruby/1.8/rubygems.rb:49:in `gem'
	from /usr/local/bin/ri:18

忘れてしまいましたが、rdocだかriだからをgem installしたらこんな事になりました。
hoeというのがないと言われています。続いて、

akira@akira-desktop:~$ sudo gem install --remote ZenTest --include-dependencies
INFO:  `gem install -y` is now default and will be removed
INFO:  use --ignore-dependencies to install only the gems you list
Successfully installed rubyforge-1.0.0
Successfully installed hoe-1.7.0
Successfully installed ZenTest-3.10.0
3 gems installed
Installing ri documentation for rubyforge-1.0.0...
Installing ri documentation for hoe-1.7.0...
Installing ri documentation for ZenTest-3.10.0...
Installing RDoc documentation for rubyforge-1.0.0...
Installing RDoc documentation for hoe-1.7.0...
Installing RDoc documentation for ZenTest-3.10.0...

ZenTestというのをインストールするとhoeがインストールされて、

akira@akira-desktop:~$ ri File
Updating class cache with 352 classes...
/usr/local/lib/ruby/gems/1.8/gems/rdoc-2.1.0/lib/rdoc/ri/driver.rb:544: [BUG] Segmentation fault
ruby 1.8.7 (2008-09-03 revision 19079) [i686-linux]

Aborted

エラーが変わりました。
このエラーは何なのでしょうか?

-- 
Akira Hayakawa <ruby / i-mail.jp>