Errores

Unhelpful message "undefined method `closed?' for nil:NilClass" when DNS misconfigured

• Solución: Aplicar Parche ​http://redmine.ruby-lang.org/attachments/download/835
• Más información: ​http://projects.reductivelabs.com/issues/3101 , ​http://redmine.ruby-lang.org/issues/show/2708