Hello, I have encountered some errors in Boost, while running some static analyzer tool. It is reported in boost/date_time/time_duration.hpp The error is: *boost::date_time::time_duration has user-written copy constructor but no corresponding user-written assignment operator.* *Is it valid to apply the following patch.* diff -Naur a/boost/date_time/time_duration.hpp b/boost/date_time/time_duration.hpp --- a/boost/date_time/time_duration.hpp 2012-10-11 00:35:03.000000000 +0530 +++ b/boost/date_time/time_duration.hpp 2012-11-26 18:29:16.000000000 +0530 @@ -251,6 +251,9 @@ return ticks_; } + private: + time_duration &operator=(const time_duration<T, rep_type>& other); + protected: explicit time_duration(impl_type in) : ticks_(in) {} impl_type ticks_; * * -- Regards, Gaurav