[Bug fortran/88124] Wrong results with procedure in seperate file

[sgk at troutmask dot apl.washington.edu]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88124

--- Comment #5 from Steve Kargl <sgk at troutmask dot apl.washington.edu> ---
On Wed, Nov 21, 2018 at 03:57:05AM +0000, kargl at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88124
> 
> --- Comment #4 from kargl at gcc dot gnu.org ---
> (In reply to kargl from comment #3)
> > I think you're running into undefined behavior.  Even though
> > the derive type defined in the include file is obviously
> > identical when the main program and subroutine are in
> > different files and the file is INCLUDEd and therefore
> > compiled separately, these are different types.  The 
> > namespaces for the main program and the subroutine are
> > different.
> 
> PS: INCLUDE is not a substitute for MODULE.
> 

PPS: I think the code when in separate files is non-conforming
as the types are different and therefore the call to the 
subroutine in the main program has a type mismatch.  gfortran
is not required to diagnosis this mismatch as the subroutine
has an implicit interface.