id summary reporter owner description type status milestone component version severity resolution keywords cc 3954 fusion algorithms must be overloaded for const and non-const arguments Eric Niebler Joel de Guzman "Several fusion algorithms (e.g. pop_front, reverse) take their arguments by const reference unconditionally. This is inconsistent with the result_of templates for these algorithms which are sensitive to the const-ness of their arguments. For consistency and correctness, all fusion algorithms must have overloads that take their arguments by non-const reference. " Bugs new Boost 1.43.0 fusion Boost 1.42.0 Problem