No such file to load -- stringio (LoadError)?

I recently installed Ruby 1.8.4 on Mac OS X 10.4.7, following
the instructions in

Dan Benjamin

Although irb starts up and runs OK, I am unable to get ri to work
(either within irb or as an external command).

It says:

ri Proc
/Users/rdm/.irbrc:2: warning:
Insecure world writable dir /Volumes,
mode 04177/usr/local/lib/ruby/1.8/yaml.rb:9:in `require’:
no such file to load – stringio (LoadError)
from /usr/local/lib/ruby/1.8/yaml.rb:9
from /usr/local/lib/ruby/1.8/rdoc/ri/ri_descriptions.rb:1
from /usr/local/lib/ruby/1.8/rdoc/ri/ri_reader.rb:1
from /usr/local/lib/ruby/1.8/rdoc/ri/ri_driver.rb:5
from /usr/local/bin/ri:43
=> false

Ignoring the /Volumes nastygram (Hey, it’s a mount point!), it
appears that a require is failing. Hmmm…

=> [“/usr/local/lib/ruby/site_ruby/1.8”,

Looks pretty good; let’s see if the file is there and readable:

% cd /usr/local/lib/ruby

% du -a . | grep stringio.rb
8 ./1.8/yaml/stringio.rb
16 ./gems/1.8/gems/actionmailer-1.1.5/lib/action_mailer/

% wc ./1.8/yaml/stringio.rb
83 175 1969 ./1.8/yaml/stringio.rb

At this point, I’m tapped out. Suggestions, anyone?

-r Rich M. [email protected] +1 650-873-7841

Technical editing and writing, programming, and web development