https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109356
--- Comment #6 from Jonny Grant <jg at jguk dot org> --- Tried a few other compilers on godbolt. ICC gets the warning on line 6 https://godbolt.org/z/fYb9c8f61 nvc++ gives the warning on line 6 https://godbolt.org/z/xvh67odzY MSVC and Clang don't.
