[Bug c++/91585] segfault when calling a non void function without a return statement

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91585

--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
>Effectively, if it is the expected behaviour, it's not a bug.

Yes because this behavior is only undefined at runtime.  So no diagnostic of
the issue is required as it is only undefined if invoked.