[Bug fortran/71796] Link error referencing compiler generated symbol __vtab_xxx

[dominiq at lps dot ens.fr]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71796

--- Comment #4 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> If you want a test case that exhibits no run time error upon successful
> compilation and linking, then replace the entire main program with an
> END statement.

I am using that for years and was not what I asked for (sorry if I have been
unclear).

Presently the test obviously segfaults at run time.

What I'ld like to have is an actual implementation of b_binding and the
expected output at run time.