[Bug c++/109323] No error when neither of return_value or return_void is defined

[enricomaria.dean6elis at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109323

--- Comment #2 from Enrico Maria De Angelis <enricomaria.dean6elis at gmail dot 
com> ---
Created attachment 54790
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=54790&action=edit
Attachment for report 109323