From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-bugzilla@gcc.gnu.org>
Received: by sourceware.org (Postfix, from userid 48)
 id 3E9823850407; Thu, 30 Jul 2020 02:15:18 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 3E9823850407
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org;
 s=default; t=1596075318;
 bh=LxfWx2j0lwkuc4zdlAW40tcZY69DcZwRAn+IR0QxTgY=;
 h=From:To:Subject:Date:In-Reply-To:References:From;
 b=JSsvq5vHWwX6FnVIlDNM0hy7uXgifo+4UR7R2zGm0WEaKNRO0FdPTWabjyau52UuB
 yJbOa0tMBAV7hvGHBmdLQ1L0VkuqdiIj4ZxSQs6Jb9FmK3WExn5WAYRi5m42YO8xBU
 cPAjXjHPQ19d4jdlokCuIk7pLZxMmVRFgKBky+DQ=
From: "cvs-commit at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/96106] [10/11 Regression] A friend abbreviated template
 function denies access to private members
Date: Thu, 30 Jul 2020 02:15:18 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: c++
X-Bugzilla-Version: 10.1.0
X-Bugzilla-Keywords: rejects-valid
X-Bugzilla-Severity: normal
X-Bugzilla-Who: cvs-commit at gcc dot gnu.org
X-Bugzilla-Status: ASSIGNED
X-Bugzilla-Resolution: 
X-Bugzilla-Priority: P3
X-Bugzilla-Assigned-To: ppalka at gcc dot gnu.org
X-Bugzilla-Target-Milestone: 10.3
X-Bugzilla-Flags: 
X-Bugzilla-Changed-Fields: 
Message-ID: <bug-96106-4-tb6xgnNq1q@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-96106-4@http.gcc.gnu.org/bugzilla/>
References: <bug-96106-4@http.gcc.gnu.org/bugzilla/>
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable
X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/
Auto-Submitted: auto-generated
MIME-Version: 1.0
X-BeenThere: gcc-bugs@gcc.gnu.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: Gcc-bugs mailing list <gcc-bugs.gcc.gnu.org>
List-Unsubscribe: <https://gcc.gnu.org/mailman/options/gcc-bugs>,
 <mailto:gcc-bugs-request@gcc.gnu.org?subject=unsubscribe>
List-Archive: <https://gcc.gnu.org/pipermail/gcc-bugs/>
List-Post: <mailto:gcc-bugs@gcc.gnu.org>
List-Help: <mailto:gcc-bugs-request@gcc.gnu.org?subject=help>
List-Subscribe: <https://gcc.gnu.org/mailman/listinfo/gcc-bugs>,
 <mailto:gcc-bugs-request@gcc.gnu.org?subject=subscribe>
X-List-Received-Date: Thu, 30 Jul 2020 02:15:18 -0000

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D96106

--- Comment #3 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:f31dd9beb95f4beda1d2bd5c0526c42d0ce455c4

commit r11-2418-gf31dd9beb95f4beda1d2bd5c0526c42d0ce455c4
Author: Patrick Palka <ppalka@redhat.com>
Date:   Wed Jul 29 22:06:36 2020 -0400

    c++: abbreviated function template friend matching [PR96106]

    In the below testcase, duplicate_decls wasn't merging the tsubsted
    friend declaration for 'void add(auto)' with its definition, because
    reduce_template_parm_level (during tsubst_friend_function) lost the
    DECL_VIRTUAL_P flag on the auto's invented template parameter, which
    caused template_heads_equivalent_p to deem the two template heads as not
    equivalent in C++20 mode.

    This patch makes reduce_template_parm_level carry over the
    DECL_VIRTUAL_P flag from the original TEMPLATE_PARM_DECL.

    gcc/cp/ChangeLog:

            PR c++/96106
            * pt.c (reduce_template_parm_level): Propagate DECL_VIRTUAL_P
            from the original TEMPLATE_PARM_DECL to the new lowered one.

    gcc/testsuite/ChangeLog:

            PR c++/96106
            * g++.dg/concepts/abbrev7.C: New test.=