> I've checked in a patch to save the _M_n state. If it is r212496, did you test it?
It breaks many tests (see https://gcc.gnu.org/ml/gcc-regression/2014-07/msg00213.html) /opt/gcc/work/libstdc++-v3/include/ext/random.tcc: In function 'std::basic_ostream<_CharT, _Traits>& __gnu_cxx::operator<<(std::basic_ostream<_CharT, _Traits>&, const __gnu_cxx::uniform_on_sphere_distribution<_Dimen, _RealType>&)': /opt/gcc/work/libstdc++-v3/include/ext/random.tcc:1587:22: error: '_M_n' was not declared in this scope return __os << _M_n; ^ /opt/gcc/work/libstdc++-v3/include/ext/random.tcc: In function 'std::basic_istream<_CharT, _Traits>& __gnu_cxx::operator>>(std::basic_istream<_CharT, _Traits>&, __gnu_cxx::uniform_on_sphere_distribution<_Dimen, _RealType>&)': /opt/gcc/work/libstdc++-v3/include/ext/random.tcc:1598:22: error: '_M_n' was not declared in this scope return __is >> _M_n ^ TIA Dominique
