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From: "cvs-commit at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/110415] (Re)allocation on assignment to allocatable
 polymorphic variable from allocatable polymorphic function result
Date: Tue, 28 Nov 2023 15:28:00 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D110415

--- Comment #4 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Andrew Jenner <andrewjenner@gcc.gnu.o=
rg>:

https://gcc.gnu.org/g:b247e917ff13328298c1eecf8563b12edd7ade04

commit r14-5931-gb247e917ff13328298c1eecf8563b12edd7ade04
Author: Andrew Jenner <andrew@codesourcery.com>
Date:   Tue Nov 28 15:27:05 2023 +0000

    Fortran: fix reallocation on assignment of polymorphic variables [PR110=
415]

    This patch fixes two bugs related to polymorphic class assignment in the
    Fortran front-end. One (described in PR110415) is an issue with the mal=
loc
    and realloc calls using the size from the old vptr rather than the new =
one.
    The other is caused by the return value from the realloc call being
ignored.
    Testcases are added for these issues.

    2023-11-28  Andrew Jenner  <andrew@codesourcery.com>

    gcc/fortran/
            PR fortran/110415
            * trans-expr.cc (trans_class_vptr_len_assignment): Add
            from_vptrp parameter. Populate it. Don't check for DECL_P
            when deciding whether to create temporary.
            (trans_class_pointer_fcn, gfc_trans_pointer_assignment): Add
            NULL argument to trans_class_vptr_len_assignment calls.
            (trans_class_assignment): Get rhs_vptr from
            trans_class_vptr_len_assignment and use it for determining size
            for allocation/reallocation. Use return value from realloc.

    gcc/testsuite/
            PR fortran/110415
            * gfortran.dg/pr110415.f90: New test.
            * gfortran.dg/asan/pr110415-2.f90: New test.
            * gfortran.dg/asan/pr110415-3.f90: New test.

    Co-Authored-By: Tobias Burnus  <tobias@codesourcery.com>=