i upgraded to rubygems-1.3.7-r2 and can't run any ruby programs with the following error: /usr/lib64/ruby/site_ruby/1.8/rubygems/defaults/operating_system.rb:25:in `ruby_engine': uninitialized constant Module::RUBY_DESCRIPTION (NameError) from /usr/lib64/ruby/site_ruby/1.8/rubygems/defaults.rb:36:in `user_dir' from /usr/lib64/ruby/site_ruby/1.8/rubygems/defaults/operating_system.rb:15:in `default_path' from /usr/lib64/ruby/site_ruby/1.8/rubygems.rb:635:in `path' from /usr/lib64/ruby/site_ruby/1.8/rubygems/source_index.rb:68:in `installed_spec_directories' from /usr/lib64/ruby/site_ruby/1.8/rubygems/source_index.rb:58:in `from_installed_gems' from /usr/lib64/ruby/site_ruby/1.8/rubygems.rb:883:in `source_index' from /usr/lib64/ruby/site_ruby/1.8/rubygems/gem_path_searcher.rb:81:in `init_gemspecs' from /usr/lib64/ruby/site_ruby/1.8/rubygems/gem_path_searcher.rb:13:in `initialize' from /usr/lib64/ruby/site_ruby/1.8/rubygems.rb:841:in `new' from /usr/lib64/ruby/site_ruby/1.8/rubygems.rb:841:in `searcher' from /usr/lib64/ruby/site_ruby/1.8/rubygems.rb:840:in `synchronize' from /usr/lib64/ruby/site_ruby/1.8/rubygems.rb:840:in `searcher' from /usr/lib64/ruby/site_ruby/1.8/rubygems.rb:479:in `find_files' from /usr/lib64/ruby/site_ruby/1.8/rubygems.rb:983:in `load_plugins' from /usr/lib64/ruby/site_ruby/1.8/rubygems.rb:1139 from /usr/lib64/ruby/site_ruby/1.8/auto_gem.rb:5:in `require' from /usr/lib64/ruby/site_ruby/1.8/auto_gem.rb:5 Reproducible: Always ruby -v ruby 1.8.6 (2010-01-11 patchlevel 388) [x86_64-linux]
downgrading to rubygems-1.3.7 resolves the problem.
Got that reported as well, seems like RUBY_DESCRIPTION was added in 1.8.7, fixing with an -r3.
fixed in -r3.