id summary reporter owner description type status milestone component version severity resolution keywords cc 5476 qi::list::parse incorrectly assumes value_type is default constructible anonymous Joel de Guzman "In my case I'm using a boost::shared_ptr<> containing maintaining a pointer to an abstract base class, this causes the following expression to naturally fail: // create a local value if Attribute is not unused_type typedef typename traits::container_value::type value_type; value_type val = value_type(); " Bugs closed To Be Determined spirit Boost 1.47.0 Problem invalid