[Bug libstdc++/66262] [REGRESSION] testsuite failure with libstdc++ (gcc-5) and g++-4.9 together

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66262

Jonathan Wakely <redi at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|REOPENED                    |RESOLVED
         Resolution|---                         |INVALID

--- Comment #14 from Jonathan Wakely <redi at gcc dot gnu.org> ---
However, it's never been supported to combine objects built with different
major versions if using C++11.

(In reply to Gianfranco from comment #0)
> the problem actually is that now Debian has libstdc++ from gcc-5, and the
> default compiler still set to gcc-4.9.

That combination cannot be used for C++11 code.