id summary reporter owner description type status milestone component version severity resolution keywords cc 5100 runtime_error locale::facet::_S_create_c_locale name not valid Rui Pedro Fernandes Beman Dawes "static initialization in filesystem v3 at path.cpp:98 leads to the runtime error that gives title to the ticket. I know this is a problem with libstdc++ (c_locale.cc contains this comment: ""Currently, the generic model only supports the ""C"" locale.""). However, I'm using default filesystem v2 and thus this should not be an issue to me (as it wasn't when I was using boost_1_41)." Bugs closed Boost 1.48.0 filesystem Boost 1.45.0 Problem fixed