[Bug fortran/94925] New: Undesired runtime warning message

[Bug fortran/94925] New: Undesired runtime warning message

[siteg at mathalacarte dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94925

            Bug ID: 94925
           Summary: Undesired runtime warning message
           Product: gcc
           Version: 10.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
          Assignee: unassigned at gcc dot gnu.org
          Reporter: siteg at mathalacarte dot com
  Target Milestone: ---

Just upgraded to GNU Fortran (GCC) 10.0.1 20200328 (Red Hat 10.0.1-0.11), and
am getting this warning at runtime:
"Fortran runtime warning: An array temporary was created"
This did not happen in the past.  I have tried adding the flags
-fcheck=no-array-temps -Wno-array-temporaries
to no effect.  These occur in a large program where these temporary arrays are
used for debugging information that would not be used in production.  I have
not managed to create a small program that illustrates the problem.  I'm hoping
that the fact that this problem occurred between the 9.3.1 compiler and the
current one may help in getting it tracked down.

[Bug fortran/94925] Undesired runtime warning message

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94925

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
The code printing this diagnostic is guarded with

      if (gfc_option.rtcheck & GFC_RTCHECK_ARRAY_TEMPS)
        {
          char * msg;

          if (fsym && proc_name)
            msg = xasprintf ("An array temporary was created for argument "
                             "'%s' of procedure '%s'", fsym->name, proc_name);

and thus

-fcheck-array-temporaries

[Bug fortran/94925] Undesired runtime warning message

[siteg at mathalacarte dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94925

--- Comment #2 from Fred Krogh <siteg at mathalacarte dot com> ---
I'm unclear on comment 1.  Are you saying the code is such that this diagnostic
can not be turned off and that is the way it should be, or that there is an a
problem in gfortran with the if that is guarding the diagnostic.  And if the
latter, why not mark the status as confirmed.  Thanks.

[Bug fortran/94925] Undesired runtime warning message

[tkoenig at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94925

Thomas Koenig <tkoenig at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |tkoenig at gcc dot gnu.org
             Status|UNCONFIRMED                 |WAITING
   Last reconfirmed|                            |2020-05-18
     Ever confirmed|0                           |1

--- Comment #3 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
Please provide a self-contained example and the complete command
line that you use.

[Bug fortran/94925] Undesired runtime warning message

[siteg at mathalacarte dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94925

--- Comment #4 from Fred Krogh <siteg at mathalacarte dot com> ---
Before submitting this I tried to make a small test case to show the problem. 
It did not show the problem.  I was hoping that the fact that the message just
started and there were no options that would turn it off would be sufficient.
Sorry.

[Bug fortran/94925] Undesired runtime warning message

[dominiq at lps dot ens.fr]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94925

Dominique d'Humieres <dominiq at lps dot ens.fr> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|WAITING                     |RESOLVED
         Resolution|---                         |INVALID

--- Comment #5 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
You should not get the warning if you don't ask for. Without reproducer there
is nothing that ca be done. Closing.