Code compiles but gives a runtime error (through the checked iterators):
// use time_put facet to create final string return std::use_facet<std::time_put<CharT> >(a_ios.getloc()).put(next, a_ios, fill_char, &tm_value, &*a_format.begin(), &*a_format.begin()+a_format.size());
ok, sorry, should have been more specific there: Could you send a short but "complete" sample which compiles but crashes? It should contain a main function which does serves only one purpose: Demonstrate the problem in as little code as possible (but as much as necessary to actually be able to create a program from it). Something like this would be useful to attach to a bug report, too. Filing a bug report should work (never had a problem), starting from here: http://www.boost.org/support/bugs.html Regards, Roland