id summary reporter owner description type status milestone component version severity resolution keywords cc 1230 mbstate uninitialized Jan-Erik.Dahlin@… Beman Dawes In boost_1_34_1/libs/filesystem/src/path.cpp the functions to_internal and to_external both call the converter without initializing the state. The type mbstate_t is a POD so state must be initialized before the call. Bugs closed Boost 1.35.0 filesystem Boost 1.34.1 Problem fixed