[Bug c/78868] When one variadic function calls another one, the parameters are reversed, if va_arg is used directly in function call.

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78868

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Note C++17 does specify this more now IIRC.