From: Jean-Christophe Le Lann Date: 2010-10-30T23:39:17+09:00 Subject: Rdoc problem on some gems (like ruby-graphviz) Hi, One of my computers is running Fedora 12, where I compiled ruby 1.9.1p376. There however, there is a problem with RDoc when I try to install some new gems (message below) like ruby-graphviz. Any idea what to do ??? thx JCLL [root@localhost ~]# gem19 install ruby-graphviz Successfully installed ruby-graphviz-0.9.18 1 gem installed Installing ri documentation for ruby-graphviz-0.9.18... Updating ri class cache with 266 classes... Installing RDoc documentation for ruby-graphviz-0.9.18... ERROR: While generating documentation for ruby-graphviz-0.9.18 ... MESSAGE: Error while evaluating /usr/local/lib/ruby/gems/1.9.1/gems/rdoc-2.3.0/lib/rdoc/generator/template/darkfish/classpage.rhtml: undefined method `each' for # (at "r\">Namespace\n\t\t\t\t
    \n\t\t\t\t\t") ... RDOC args: lib README.rdoc COPYING AUTHORS (continuing with the rest of the installation) gem19 update --system Updating RubyGems Nothing to update gem19 list -b --local *** LOCAL GEMS *** doodle (0.2.3) haml (2.2.24) hanna (0.1.12) progressbar (0.9.0) rake (0.8.7) rdoc (2.3.0) ruby-graphviz (0.9.18) And then "require 'graphviz'" fails