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From: "cvs-commit at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/96830] GCC does not complain about redeclaration with
 inconsistent requires clause
Date: Tue, 14 Mar 2023 23:18:16 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D96830

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

https://gcc.gnu.org/g:cd5baeb4489b6a953abbc7f02fea457fd9ed2f83

commit r13-6677-gcd5baeb4489b6a953abbc7f02fea457fd9ed2f83
Author: Patrick Palka <ppalka@redhat.com>
Date:   Tue Mar 14 19:14:29 2023 -0400

    c++: redeclaring member of constrained class template [PR96830]

    An out-of-line definition of a member of a constrained class template
    needs to repeat the template's constraints, but it turns out we don't
    verify anywhere that the two sets of constraints match.  This patch
    adds such a check to push_template_decl, nearby a similar consistency
    check for the template parameter list lengths.

            PR c++/96830

    gcc/cp/ChangeLog:

            * pt.cc (push_inline_template_parms_recursive): Set
            TEMPLATE_PARMS_CONSTRAINTS.
            (push_template_decl): For an out-of-line declaration, verify
            constraints for each enclosing template scope match those of the
            original template declaratation.

    gcc/testsuite/ChangeLog:

            * g++.dg/cpp2a/concepts-class5.C: New test.
            * g++.dg/cpp2a/concepts-class5a.C: New test.=