[Bug c++/99162] problem when compile with O2 or O3

[redi at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99162

--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Zhang Haibin from comment #0)
> $ g++ --version
> g++ (GCC) 4.9.2

This compiler is ancient and we're not interested in bug reports for it.

If you use a modern compiler you can use -fsanitize=undefined to find bugs like
this integer overflow problem.