[Bug c++/104722] Wrong std::accumulate result with -D_GLIBCXX_PARALLEL flag

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104722

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
I think this code is undefined as the order of the addition is not specified
for std::accumulate