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 A71E138515E4; Wed, 22 Mar 2023 12:16:36 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org A71E138515E4
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org;
	s=default; t=1679487396;
	bh=Yty26mdQpJz5vh0YrOW1XjcfAtdVTFqkNG7y+eYhEok=;
	h=From:To:Subject:Date:From;
	b=G6lChNeoHQ/AA4ugfBGr6OtfIH8vfgafFmR/qO0ZDBHPqvzRFu7khjntqZR9+W8V4
	 yvFEbhlzCU4H0CDa8QyAmx5/ccPnW//x2ZW1oHz39UuXnnEycOTJbKhDjbvHbYFVrS
	 TV8MRMTg9y9Ir2zh8MVXff/nK5JE8Up3SvPmnbQ8=
From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: =?UTF-8?B?W0J1ZyBjKysvMTA5MjQ3XSBOZXc6IFsxMyBSZWdyZXNzaW9uXSBl?=
 =?UTF-8?B?cnJvcjogY29udmVydGluZyB0byDigJhvcHRpb25hbDxXZWJDb3JlOjpTb3Vy?=
 =?UTF-8?B?Y2VCcnVzaDo6QnJ1c2g+4oCZIGZyb20gaW5pdGlhbGl6ZXIgbGlzdCB3b3Vs?=
 =?UTF-8?B?ZCB1c2UgZXhwbGljaXQgY29uc3RydWN0b3Ig4oCYb3B0aW9uYWw8X1RwPjo6?=
 =?UTF-8?B?b3B0aW9uYWwoX1VwKSBbd2l0aCBfVXAgPSBpbnQ7IF9UcCA9IFdlYkNvcmU6?=
 =?UTF-8?B?OlNvdXJjZUJydXNoOjpCcnVzaF3igJkgc2luY2UgcjEzLTY3NjUtZ2EyMjY1?=
 =?UTF-8?B?OTBmZWZiMzVlZDY=?=
Date: Wed, 22 Mar 2023 12:16:36 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: new
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: c++
X-Bugzilla-Version: 13.0
X-Bugzilla-Keywords: rejects-valid
X-Bugzilla-Severity: normal
X-Bugzilla-Who: marxin at gcc dot gnu.org
X-Bugzilla-Status: UNCONFIRMED
X-Bugzilla-Resolution: 
X-Bugzilla-Priority: P3
X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org
X-Bugzilla-Target-Milestone: ---
X-Bugzilla-Flags: 
X-Bugzilla-Changed-Fields: bug_id short_desc product version bug_status
 keywords bug_severity priority component assigned_to reporter cc
 target_milestone
Message-ID: <bug-109247-4@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
List-Id: <gcc-bugs.sourceware.org>

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D109247

            Bug ID: 109247
           Summary: [13 Regression] error: converting to
                    =E2=80=98optional<WebCore::SourceBrush::Brush>=E2=80=99=
 from
                    initializer list would use explicit constructor
                    =E2=80=98optional<_Tp>::optional(_Up) [with _Up =3D int=
; _Tp =3D
                    WebCore::SourceBrush::Brush]=E2=80=99 since
                    r13-6765-ga226590fefb35ed6
           Product: gcc
           Version: 13.0
            Status: UNCONFIRMED
          Keywords: rejects-valid
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: marxin at gcc dot gnu.org
                CC: mpolacek at gcc dot gnu.org
  Target Milestone: ---

The following is reduced from webkit2gtk3:gtk3 package:

$ cat webcore13.ii
template <typename _Tp> struct optional {
  template <typename _Up> explicit optional(_Up);
  template <typename _Up =3D _Tp> void operator=3D(_Up);
};
namespace WebCore {
int setPattern_pattern;
struct SourceBrush {
  struct Brush {
    int brush;
  };
  void setPattern() { m_brush =3D {setPattern_pattern}; }
  optional<Brush> m_brush;
};
} // namespace WebCore

$ clang++ webcore13.ii -c && g++-12 webcore13.ii -c
$ g++ webcore13.ii -c
webcore13.ii: In member function =E2=80=98void WebCore::SourceBrush::setPat=
tern()=E2=80=99:
webcore13.ii:11:52: error: converting to
=E2=80=98optional<WebCore::SourceBrush::Brush>=E2=80=99 from initializer li=
st would use
explicit constructor =E2=80=98optional<_Tp>::optional(_Up) [with _Up =3D in=
t; _Tp =3D
WebCore::SourceBrush::Brush]=E2=80=99
   11 |   void setPattern() { m_brush =3D {setPattern_pattern}; }
      |                                                    ^=