https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65890
--- Comment #8 from Jonathan Wakely <redi at gcc dot gnu.org> ---
The purpose of G++ is not a validation tool for finding non-portable code. As I
said, it's to be a useful compiler.
It has always been the policy of G++ (and other compilers!) to incorporate DRs
into past standard modes, and that is clearly documented in the manual:
c++98
c++03
The 1998 ISO C++ standard plus the 2003 technical corrigendum
and some additional defect reports.
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
So this is not a bug and there is no documentation issue.
