https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88947
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> --- (In reply to Tomalak Geret'kal from comment #0) > (Apologies that I am not sufficiently familiar with libstdc++ version > history to select an appropriate version number for this bug.) Libstdc++ doesn't have version numbers and you don't need to know history. You're supposed to say what version of GCC you're reporting the bug against.