https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65142
--- Comment #9 from Jonathan Wakely <redi at gcc dot gnu.org> --- (In reply to Jonathan Wakely from comment #8) > (In reply to Richard Biener from comment #7) > > If the user controls how the random file is opened (non-blocking or > > blocking) > > They don't. To be clear, it's always opened blocking with std::fopen(fname, "rb") New proposed patch at https://gcc.gnu.org/ml/gcc-patches/2015-09/msg01050.html