littlechef error after yum package installs

gistfile1.txt

--2012-10-01 17:17:03--  http://production.cf.rubygems.org/rubygems/rubygems-1.7.2.tgz
Resolving production.cf.rubygems.org... 54.240.170.140, 54.240.170.144, 54.240.170.149, ...
Connecting to production.cf.rubygems.org|54.240.170.140|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 245606 (240K) [binary/octet-stream]
Saving to: “rubygems-1.7.2.tgz”

100%[=============================================================================================================================>] 245,606     --.-K/s   in 0.01s   

2012-10-01 17:17:03 (22.7 MB/s) - “rubygems-1.7.2.tgz” saved [245606/245606]

Invalid gemspec in [/usr/lib64/ruby/gems/1.8/specifications/mixlib-shellout-1.1.0.gemspec]: invalid date format in specification: "2012-08-06 00:00:00.000000000Z"
Invalid gemspec in [/usr/lib64/ruby/gems/1.8/specifications/mixlib-shellout-1.1.0.gemspec]: invalid date format in specification: "2012-08-06 00:00:00.000000000Z"
RubyGems 1.7.2 installed
Invalid gemspec in [/usr/lib64/ruby/gems/1.8/specifications/mixlib-shellout-1.1.0.gemspec]: invalid date format in specification: "2012-08-06 00:00:00.000000000Z"
./lib/rubygems/custom_require.rb:36:in `gem_original_require': no such file to load -- rdoc/rdoc (LoadError)
	from ./lib/rubygems/custom_require.rb:36:in `require'
	from ./lib/rubygems/commands/setup_command.rb:330:in `run_rdoc'
	from ./lib/rubygems/commands/setup_command.rb:240:in `install_rdoc'
	from ./lib/rubygems/commands/setup_command.rb:113:in `execute'
	from ./lib/rubygems/command.rb:278:in `invoke'
	from ./lib/rubygems/command_manager.rb:133:in `process_args'
	from ./lib/rubygems/command_manager.rb:103:in `run'
	from ./lib/rubygems/gem_runner.rb:64:in `run'
	from setup.rb:35

Fatal error: sudo() received nonzero return code 1 while executing!

Requested: ruby setup.rb --no-format-executable
Executed: sudo -S -p 'sudo password:'  /bin/bash -l -c "cd rubygems-1.7.2 && ruby setup.rb --no-format-executable"

Aborting.