[Bug fortran/94109] [8/9/10/11 Regression] Memory leak introduced in 8.3.0->8.3.1

["cvs-commit at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94109

--- Comment #17 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-9 branch has been updated by Thomas Kथà¤nig
<tkoenig@gcc.gnu.org>:

https://gcc.gnu.org/g:9224bcfd6a4edf61e371e2d83fb126c948182cba

commit r9-8676-g9224bcfd6a4edf61e371e2d83fb126c948182cba
Author: Thomas Koenig <tkoenig@gcc.gnu.org>
Date:   Sun Jun 14 13:50:48 2020 +0200

    When avoiding double deallocation, look at namespace, expression and
component.

    Our finalization handling is a mess.  Really, we should get to try and get
    this fixed for gcc 11.

    In the meantime, here is a patch which fixes a regression I introduced
    when fixing a regression with a memory leak.  The important thing
    here is to realize that we do not need to finalize (and deallocate)
    multiple times for the same expression and the same component
    in the same namespace.  It might cause code size regressions, but
    better big code than wrong code...

    Backported from r11-1296-g1af22e455584ef5fcad2b4474c1efc3fd26f6cb3 .

    gcc/fortran/ChangeLog:

            PR fortran/94109
            * class.c (finalize_component): Return early if finalization has
            already happened for expression and component within namespace.
            * gfortran.h (gfc_was_finalized): New type.
            (gfc_namespace): Add member was_finalzed.
            (gfc_expr): Remove finalized.
            * symbol.c (gfc_free_namespace): Free was_finalized.

    gcc/testsuite/ChangeLog:

            PR fortran/94109
            * gfortran.dg/finalize_34.f90: Adjust free counts.
            * gfortran.dg/finalize_36.f90: New test.