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 27B2C3840C1D; Thu,  4 Mar 2021 05:13:52 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 27B2C3840C1D
From: "cvs-commit at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/98810] [9/10 Regression] [C++20] ICE in tsubst_copy, at
 cp/pt.c:16771
Date: Thu, 04 Mar 2021 05:13:51 +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: 11.0
X-Bugzilla-Keywords: ice-on-valid-code
X-Bugzilla-Severity: normal
X-Bugzilla-Who: cvs-commit at gcc dot gnu.org
X-Bugzilla-Status: ASSIGNED
X-Bugzilla-Resolution: 
X-Bugzilla-Priority: P2
X-Bugzilla-Assigned-To: jason at gcc dot gnu.org
X-Bugzilla-Target-Milestone: 9.4
X-Bugzilla-Flags: 
X-Bugzilla-Changed-Fields: 
Message-ID: <bug-98810-4-MCiLdFN3O1@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-98810-4@http.gcc.gnu.org/bugzilla/>
References: <bug-98810-4@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, 04 Mar 2021 05:13:52 -0000

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D98810

--- Comment #6 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-9 branch has been updated by Jason Merrill
<jason@gcc.gnu.org>:

https://gcc.gnu.org/g:89896df2cbfa52940c81858d9c4111633b533d25

commit r9-9265-g89896df2cbfa52940c81858d9c4111633b533d25
Author: Jason Merrill <jason@redhat.com>
Date:   Thu Feb 25 16:47:53 2021 -0500

    c++: Fix class NTTP constness handling [PR98810]

    Here, when substituting still-dependent args into an alias template, we=
 see
    a non-const type because the default argument is non-const, and is not a
    template parm object because it's still dependent.

    gcc/cp/ChangeLog:

            PR c++/98810
            * pt.c (tsubst_copy) [VIEW_CONVERT_EXPR]: Add const
            to a class non-type template argument that needs it.

    gcc/testsuite/ChangeLog:

            PR c++/98810
            * g++.dg/cpp2a/nontype-class-defarg1.C: New test.=