[Bug fortran/66605] -Wunused-parameter causes internal compiler error with gfortran 5.1.0

["manu at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66605

--- Comment #7 from Manuel LÃpez-IbÃÃez <manu at gcc dot gnu.org> ---
(In reply to Dominique d'Humieres from comment #5)
> If I understand correctly the above statement, -Wunused-parameter should not
> emit a warning for the test in comment 0: there is no parameter. The warning
> should be issued with -Wunused-dummy-argument

If so, then the ICE was not caused by my diagnostic changes, it just exposes a
problem that has been latent or introduced later. Thus, I'm not planning to
investigate further.

If it is possible to generate a valid warning that triggers the same ICE, then
we should consider one of the options I have proposed above. From your
explanation above, it seems likely that Fortran doesn't ever want to get the
middle-end warning (which makes me wonder why this warning is given in the
middle-end to begin with!). Thus another (ugly?) fix may be to disable the
warning (all warnings?) completely around calls to finalize_function.