[Bug fortran/69080] No automatic deallocation of allocatable function results

[sv.mueller@tu-braunschweig.de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69080

--- Comment #8 from Mueller <sv.mueller@tu-braunschweig.de> ---
(In reply to Dominique d'Humieres from comment #6)
> > I know that allocatables that are declared in the program itself aren't
> > deallocated automatically because of the implicit save attribute. 
> > But my thinking was that Fortran will take care of deallocating allocatable
> > in all other cases. Of course, I may be mistaken.
> 
> Well, if the user is unable to decide when and where something should be
> deallocate, how can you expect the compiler to do better? AFAIU this should
> be handled through finalization, but I am still learning and I am not in
> position to give advice in this area.

I think, in theory, the compiler could detect something like

call some_subroutine(function_returning_allocatable())

to be a potential case for automatic deallocation of the returned allocatable.
But, as was pointed out above (if I understood correctly), automatic
deallocation of allocatable function results is not part of the standard.