Since I don't normally test with msvc8 it's alot of work for me to setup an environment to see if making the chang would be effective -- I didn't see anything on the MS site that made it clear that moving to basic_ostringstream would actually resolve the problem. However, if you want to try out some replacements and verify that using ostringstream will work, I'm willing to test and put in the changes. So specifically if you replace std::basic_stringstream with std::basic_ostringstream in date_time/time_facet.hpp that should be a reasonable test to see if there is an effect. I've attached a changed version of the file which compiles and runs on Linux. Let me know.
Jeff
Jeff, Thanks! I've tried the new version and the memory leak stopped (using the program posted by OP). I also did a search in data_time and found there are other places where basic_stringstream could be replaced with basic_ostringstream. I understand this is a lot of hassles for you so we decided we would apply the changes ourselves (is there anyway we could push Microsoft to release a patch?). As for the bug, I'll try to explain a bit more below. If you have a copy of VC8, you can take a look at <ostream> and <istream>. Both basic_ostream and basic_istream derive from basic_ios and basic_iostream derives from basic_ostream and basic_istream. The basic_iostream constructor used by basic_stringstream is coded as: explicit __CLR_OR_THIS_CALL basic_iostream(basic_streambuf<_Elem, _Traits> *_Strbuf) : basic_istream<_Elem, _Traits>(_Strbuf, false), basic_ostream<_Elem, _Traits>(_Strbuf) { // construct from stream buffer pointer } basic_ios::init is called from the constructors of both basic_istream and basic_ostream in this case. basic_ios::init in turn calls ios_base::Init where a std::locale* member _Ploc (a raw pointer) is newed. This is where the memory leak occurs. If you look at Mr. Plauger's patch, he changed one of the basic_iostream constructors from the above to: explicit __CLR_OR_THIS_CALL basic_iostream(basic_streambuf<_Elem,_Traits> *_Strbuf) : basic_istream<_Elem, _Traits>(_Strbuf, false), basic_ostream<_Elem, _Traits>(_Noinit, false) { // construct from stream buffer pointer } basic_ios::init is not called in this constructor of basic_ostream so _Ploc is only newed once. HTH, Sean