[Bug fortran/85357] gfortran versions 7.2.0/8.0.1 reject F03 procedure overriding

[dominiq at lps dot ens.fr]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85357

--- Comment #3 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
gfortran 4.8.2 gives

...
Error: Non-polymorphic passed-object dummy argument of 'summation' at (1)