/Library/Ruby/Gems/1.8/gems/dm-serializer-0.9.8/lib/dm-serializer.rb:119:in `properties_to_serialize': undefined method `[]' for #<YAML::Syck::Emitter:0x1756574> (NoMethodError)
	from /Library/Ruby/Gems/1.8/gems/dm-serializer-0.9.8/lib/dm-serializer.rb:94:in `to_yaml'
	from /Library/Ruby/Gems/1.8/gems/dm-serializer-0.9.8/lib/dm-serializer.rb:93:in `map'
	from /Library/Ruby/Gems/1.8/gems/dm-serializer-0.9.8/lib/dm-serializer.rb:93:in `to_yaml'
	from /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/yaml.rb:387:in `call'
	from /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/yaml.rb:387:in `emit'
	from /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/yaml.rb:387:in `quick_emit'
	from /Library/Ruby/Gems/1.8/gems/dm-serializer-0.9.8/lib/dm-serializer.rb:92:in `to_yaml'
	from /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/yaml/rubytypes.rb:110:in `node_export'
	 ... 22 levels...
	from parsec.rb:73:in `run_all'
	from parsec.rb:70:in `each'
	from parsec.rb:70:in `run_all'
	from parsec.rb:107