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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 c++/107939] [11 Regression] Rejects use of `extern const`
 variable in a template since r11-557
Date: Fri, 24 Nov 2023 16:56:22 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D107939

--- Comment #11 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-13 branch has been updated by Patrick Palka
<ppalka@gcc.gnu.org>:

https://gcc.gnu.org/g:cc4cbf38e842cf023e2bdc63a51ef836d7726d8e

commit r13-8098-gcc4cbf38e842cf023e2bdc63a51ef836d7726d8e
Author: Patrick Palka <ppalka@redhat.com>
Date:   Thu Nov 16 09:32:07 2023 -0500

    c++: constantness of call to function pointer [PR111703]

    potential_constant_expression for CALL_EXPR tests FUNCTION_POINTER_TYPE=
_P
    on the callee rather than on the type of the callee, which means we
    always pass want_rval=3Dany when recursing and so may fail to identify a
    non-constant function pointer callee as such.  Fixing this turns out to
    further work around PR111703.

            PR c++/111703
            PR c++/107939

    gcc/cp/ChangeLog:

            * constexpr.cc (potential_constant_expression_1) <case CALL_EXP=
R>:
            Fix FUNCTION_POINTER_TYPE_P test.

    gcc/testsuite/ChangeLog:

            * g++.dg/cpp2a/concepts-fn8.C: Extend test.
            * g++.dg/diagnostic/constexpr4.C: New test.

    (cherry picked from commit 0077c0fb19981c108a01cd15af9b2d6d478c183b)=