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 E97AA3858C39; Fri,  1 Oct 2021 10:24:57 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org E97AA3858C39
From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/102447] std::regex incorrectly accepts invalid
 bracket expression
Date: Fri, 01 Oct 2021 10:24:57 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: libstdc++
X-Bugzilla-Version: 12.0
X-Bugzilla-Keywords: accepts-invalid
X-Bugzilla-Severity: normal
X-Bugzilla-Who: redi at gcc dot gnu.org
X-Bugzilla-Status: NEW
X-Bugzilla-Resolution: 
X-Bugzilla-Priority: P3
X-Bugzilla-Assigned-To: redi at gcc dot gnu.org
X-Bugzilla-Target-Milestone: ---
X-Bugzilla-Flags: 
X-Bugzilla-Changed-Fields: resolution bug_status
Message-ID: <bug-102447-4-yOfdFL0VDK@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-102447-4@http.gcc.gnu.org/bugzilla/>
References: <bug-102447-4@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: Fri, 01 Oct 2021 10:24:58 -0000

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D102447

Jonathan Wakely <redi at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|INVALID                     |---
             Status|RESOLVED                    |NEW

--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Reopening. JavaScript engines in web browsers accept invalid regexes for le=
gacy
support:
https://262.ecma-international.org/#sec-additional-ecmascript-features-for-=
web-browsers

If we're not implementing a browser engine, then it should be a syntax erro=
r:

 NonemptyClassRanges :: ClassAtom - ClassAtom ClassRanges

    It is a Syntax Error if IsCharacterClass of the first ClassAtom is true=
 or
IsCharacterClass of the second ClassAtom is true.

    It is a Syntax Error if IsCharacterClass of the first ClassAtom is false
and IsCharacterClass of the second ClassAtom is false and the CharacterValu=
e of
the first ClassAtom is larger than the CharacterValue of the second ClassAt=
om.=