[Bug fortran/123961] Incorrect overloaded procedure called

[townsend at astro dot wisc.edu]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123961

--- Comment #4 from Rich Townsend <townsend at astro dot wisc.edu> ---
I've just checked the code on 15.1 (Ubuntu Linux), and the code compiles. 

HOWEVER, if I change the return type of foo_t_0_ and foo_t_1_ to class(foo_t),
then the problem resurfaces.