[Bug fortran/87318] gfortran.dg/dtio_1.f90 is invalid

[jvdelisle at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87318

--- Comment #5 from Jerry DeLisle <jvdelisle at gcc dot gnu.org> ---
(In reply to janus from comment #4)
> (In reply to Jerry DeLisle from comment #3)
> > Created attachment 44700 [details]
> > Revised dtio_1.f90
> > 
> > Will this attached version suffice?
> 
> Looks good at first sight. Will try ifort 19 on it soon, in order to see if
> it runs as expected.
> 
> Do you think it's feasible to add some sort of diagnostics for this problem?
> Or should we rather follow ifort's approach and enforce this restriction
> without diagnostic messages? That would probably require a wrapper around
> the DTIO procedures that would enforce the restrictions, right?

My interpretation is that this is a requirement on the user. Amy diagnostics we
add at run time will be a performance hit. I do want to learn what ifort is
doing, I do not have it installed at the moment.