Ruby 1.9.1 breaking Collectd cookbook

gistfile1.txt

[2013-02-28T20:09:46+00:00] INFO: Processing ruby_block[delete_old_plugins] action create (collectd::default line 74)

================================================================================
Error executing action `create` on resource 'ruby_block[delete_old_plugins]'
================================================================================

NoMethodError
-------------
private method `open' called for Chef::Resource::File:Class

Cookbook Trace:
---------------
/var/chef/cache/cookbooks/collectd/recipes/default.rb:78:in `block (3 levels) in from_file'
/var/chef/cache/cookbooks/collectd/recipes/default.rb:76:in `each'
/var/chef/cache/cookbooks/collectd/recipes/default.rb:76:in `block (2 levels) in from_file'

Resource Declaration:
---------------------
# In /var/chef/cache/cookbooks/collectd/recipes/default.rb

 74: ruby_block "delete_old_plugins" do
 75:   block do
 76:     Dir['/etc/collectd/plugins/*.conf'].each do |path|
 77:       autogen = false
 78:       File.open(path).each_line do |line|
 79:         if line.start_with?('#') and line.include?('autogenerated')
 80:           autogen = true
 81:           break
 82:         end
 83:       end
 84:       if autogen
 85:         begin
 86:           resources(:template => path)
 87:         rescue Chef::Exceptions::ResourceNotFound
 88:           # If the file is autogenerated and has no template it has likely been removed from the run list
 89:           Chef::Log.info("Deleting old plugin config in #{path}")
 90:           File.unlink(path)
 91:         end
 92:       end
 93:     end

Compiled Resource:
------------------
# Declared in /var/chef/cache/cookbooks/collectd/recipes/default.rb:74:in `from_file'

ruby_block("delete_old_plugins") do
  action "create"
  retries 0
  retry_delay 2
  block_name "delete_old_plugins"
  cookbook_name "collectd"
  recipe_name "default"
  block #<Proc:0x0000000424f460@/var/chef/cache/cookbooks/collectd/recipes/default.rb:75>
end