[Bug libstdc++/90682] std::terminate() will happily call a null terminate handler

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90682

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED

--- Comment #7 from Jonathan Wakely <redi at gcc dot gnu.org> ---
And also 9.3.

Nobody's ever complained abut this, so I don't see a great need to backport it
to gcc-7-branch and gcc-8-branch.