[Bug c++/114889] [modules] ICE in friend_accessible_p with imported class template specialization befriending class template

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114889

--- Comment #2 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-14 branch has been updated by Patrick Palka
<ppalka@gcc.gnu.org>:

https://gcc.gnu.org/g:390bd23fd9c98dc40856beef05364f5d1c7b9d04

commit r14-10176-g390bd23fd9c98dc40856beef05364f5d1c7b9d04
Author: Patrick Palka <ppalka@redhat.com>
Date:   Mon Apr 29 21:27:59 2024 -0400

    c++/modules: imported spec befriending class tmpl [PR114889]

    When adding to CLASSTYPE_BEFRIENDING_CLASSES as part of installing an
    imported class definition, we need to look through TEMPLATE_DECL like
    make_friend_class does.

    Otherwise in the below testcase we won't add _Hashtable<int, int> to
    CLASSTYPE_BEFRIENDING_CLASSES of _Map_base, which leads to a bogus
    access check failure for _M_hash_code.

            PR c++/114889

    gcc/cp/ChangeLog:

            * module.cc (trees_in::read_class_def): Look through
            TEMPLATE_DECL when adding to CLASSTYPE_BEFRIENDING_CLASSES.

    gcc/testsuite/ChangeLog:

            * g++.dg/modules/friend-8_a.H: New test.
            * g++.dg/modules/friend-8_b.C: New test.

    Reviewed-by: Jason Merrill <jason@redhat.com>
    (cherry picked from commit 22b20ac6c6aead2d3f36c413a77dd0b80adfec39)