[Bug fortran/87673] [7/8/9 Regression] Errors caused by using function for character length in allocate with typespec

[tkoenig at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87673

--- Comment #6 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Trying some bisection.

r257267 was ok, r258291 showed the is_illegal_recursion bug and
also shows the error with that removed.

To be continued...