Can you generate rdoc in debug mode?

$ gem which rdoc
/Library/Ruby/Gems/1.8/gems/rdoc-3.1/lib/rdoc.rb

Will give you the location rdoc is installed.

Use the directory to build rdoc in debug mode:

$ rdoc /Library/Ruby/Gems/1.8/gems/rdoc-3.1/lib --debug

This should give an exception report with a backtrace, please add it to this ticket.

rdoc-data is not needed for Ruby 1.9.2 as Ruby 1.9.2 generates the proper data at install time.

from rdoc.

input a

C:\Users\serialhex>gem which rdoc
C:/Ruby192/lib/ruby/1.9.1/rdoc.rb

input b

C:\Users\serialhex>rdoc /Library/Ruby/Gems/1.8/gems/rdoc-3.1/lib --debug
file '/Library/Ruby/Gems/1.8/gems/rdoc-3.1/lib' not found

Directory doc already exists, but it looks like it isn't an RDoc directory.

Because RDoc doesn't want to risk destroying any of your existing files,
you'll need to specify a different output directory name (using the --op

C:/Ruby192/lib/ruby/gems/1.9.1/gems/rdoc-3.1/lib/rdoc/rdoc.rb:121:in error' C:/Ruby192/lib/ruby/gems/1.9.1/gems/rdoc-3.1/lib/rdoc/rdoc.rb:196:inrescue in setup_output_dir'
C:/Ruby192/lib/ruby/gems/1.9.1/gems/rdoc-3.1/lib/rdoc/rdoc.rb:175:in setup_output_dir' C:/Ruby192/lib/ruby/gems/1.9.1/gems/rdoc-3.1/lib/rdoc/rdoc.rb:408:indocument'
C:/Ruby192/lib/ruby/gems/1.9.1/gems/rdoc-3.1/bin/rdoc:15:in <top (required)>' C:/Ruby192/bin/rdoc:19:inload'
C:/Ruby192/bin/rdoc:19:in `

...there ya go, if you need anything else just ask

from rdoc.