Puppet Agent broken on OS X (Yosemite w/ Ruby 2.2.0)?

[Joaquin Menchaca]

$ ruby --version
ruby 2.2.0p0 (2014-12-25 revision 49005) [x86_64-darwin14]

$ puppet --version
/Users/vagrant/.rvm/gems/ruby-2.2.0/gems/puppet-3.7.4/lib/puppet/defaults.rb:465: warning: duplicated key at line 466 ignored: :queue_type
/Users/vagrant/.rvm/gems/ruby-2.2.0/gems/puppet-3.7.4/lib/puppet/vendor/safe_yaml/lib/safe_yaml/syck_node_monkeypatch.rb:42:in `<top (required)>': uninitialized constant Syck (NameError)
    from /Users/vagrant/.rvm/rubies/ruby-2.2.0/lib/ruby/site_ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
    from /Users/vagrant/.rvm/rubies/ruby-2.2.0/lib/ruby/site_ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
    from /Users/vagrant/.rvm/gems/ruby-2.2.0/gems/puppet-3.7.4/lib/puppet/vendor/safe_yaml/lib/safe_yaml.rb:197:in `<module:YAML>'
    from /Users/vagrant/.rvm/gems/ruby-2.2.0/gems/puppet-3.7.4/lib/puppet/vendor/safe_yaml/lib/safe_yaml.rb:132:in `<top (required)>'
    from /Users/vagrant/.rvm/rubies/ruby-2.2.0/lib/ruby/site_ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
    from /Users/vagrant/.rvm/rubies/ruby-2.2.0/lib/ruby/site_ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
    from /Users/vagrant/.rvm/gems/ruby-2.2.0/gems/puppet-3.7.4/lib/puppet/vendor/require_vendored.rb:4:in `<top (required)>'
    from /Users/vagrant/.rvm/rubies/ruby-2.2.0/lib/ruby/site_ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
    from /Users/vagrant/.rvm/rubies/ruby-2.2.0/lib/ruby/site_ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
    from /Users/vagrant/.rvm/gems/ruby-2.2.0/gems/puppet-3.7.4/lib/puppet/vendor.rb:40:in `require_libs'
    from /Users/vagrant/.rvm/gems/ruby-2.2.0/gems/puppet-3.7.4/lib/puppet/vendor.rb:53:in `load_vendored'
    from /Users/vagrant/.rvm/gems/ruby-2.2.0/gems/puppet-3.7.4/lib/puppet.rb:172:in `<module:Puppet>'
    from /Users/vagrant/.rvm/gems/ruby-2.2.0/gems/puppet-3.7.4/lib/puppet.rb:29:in `<top (required)>'
    from /Users/vagrant/.rvm/rubies/ruby-2.2.0/lib/ruby/site_ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
    from /Users/vagrant/.rvm/rubies/ruby-2.2.0/lib/ruby/site_ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
    from /Users/vagrant/.rvm/gems/ruby-2.2.0/gems/puppet-3.7.4/lib/puppet/util/command_line.rb:12:in `<top (required)>'
    from /Users/vagrant/.rvm/rubies/ruby-2.2.0/lib/ruby/site_ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
    from /Users/vagrant/.rvm/rubies/ruby-2.2.0/lib/ruby/site_ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
    from /Users/vagrant/.rvm/gems/ruby-2.2.0/gems/puppet-3.7.4/bin/puppet:7:in `<top (required)>'
    from /Users/vagrant/.rvm/gems/ruby-2.2.0/bin/puppet:23:in `load'
    from /Users/vagrant/.rvm/gems/ruby-2.2.0/bin/puppet:23:in `<main>'
    from /Users/vagrant/.rvm/gems/ruby-2.2.0/bin/ruby_executable_hooks:15:in `eval'
    from /Users/vagrant/.rvm/gems/ruby-2.2.0/bin/ruby_executable_hooks:15:in `<main>'

[Charlie Sharpsteen]

Currently, the 3.7.x branch of Puppet is only tested against Ruby 1.8.7 through 2.1.0. The upcoming 4.0 release drops Ruby 1.8.7, adds 2.2.0 and contains a fix for this issue.

There is a ticket open about getting the fix for this issue backported to 3.7:

https://tickets.puppetlabs.com/browse/PUP-3796

-Charlie