[chef] Chef 10.2 issues saving a role

[andi abes < >]

So, our app plays around, programatically manipulating roles. Recently we've been seeing this, for some instances: 

Aug 12 15:37:24 admin crowbar_app[11694]: /usr/lib/ruby/gems/1.8/gems/chef0.10.2/lib/chef/run_list.rb:78:in `=='

/usr/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/json/encoding.rb:68:in `include?'

/usr/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/json/encoding.rb:68:in `encode'/usr/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/json/encoding.rb:18:in `__send__'

/usr/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/json/encoding.rb:18:in `encode'

/usr/lib/ruby/gems/1.8/gems/activesupport-.3.5/lib/active_support/json/encoders/enumerable.rb:11:in `to_json'

/usr/lib/ruby/gems/1.8/gems/activesupport2.3.5/lib/active_support/json/encoders/enumerable.rb:11:in`map'

/usr/lib/ruby/gems/1.8/gems/activesupport-.3.5/lib/active_support/json/encoders/enumerable.rb:11:in `to_json'

/usr/lib/ruby/gems/1.8/gems/chef-0.10.2/lib/chef/run_list.rb:88:in `to_json'

/usr/lib/ruby/gems/1.8/gems/activesupport-2.3.5/lib/active_support/json/encoding.rb:70:in `encode'

Looking at run_list == ():

    def ==(other)

      if other.kind_of?(Chef::RunList)

        other.run_list_items == @run_list_items

      else

        return false unless other.respond_to?(:size) && (other.size == @run_list_items.size)

=>        other_run_list_items = other.dup

=>        other_run_list_items.map! { |item| coerce_to_run_list_item(item) }

        other_run_list_items == @run_list_items

      end

    end

If Other is a String,  it seems that it would be duped and then try to apply map! to it.

If, that is the size of the string happens to exactly be the number of run_list items...