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 422A23847718; Wed,  3 Apr 2024 17:18:34 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 422A23847718
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org;
	s=default; t=1712164714;
	bh=L7Va1oCdw0tt8vXOzRUHeUCqsV8iSwFxsoCF7yUxLdM=;
	h=From:To:Subject:Date:In-Reply-To:References:From;
	b=pIjntjl0VC6nNO/iuMBOLv7Vx7ruA988Y8HW01nN3WOrz9vPkz3svjPXyXa+QqXb2
	 WEXMNMLsO870rnqi7yvM2ca0U7zH8W1/hPP/ZH4OSU9muoznL5Z/EqOtHxE9h+jBoj
	 4w+qBZSXphZPft8HyXnXVAk7ATuPHWkLDJ8CbXjQ=
From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/93672] std::basic_istream::ignore hangs if delim MSB
 is set
Date: Wed, 03 Apr 2024 17:18:32 +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: 9.1.0
X-Bugzilla-Keywords: wrong-code
X-Bugzilla-Severity: normal
X-Bugzilla-Who: redi at gcc dot gnu.org
X-Bugzilla-Status: ASSIGNED
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: bug_status assigned_to cf_reconfirmed_on
 everconfirmed
Message-ID: <bug-93672-4-cTZ3SQ7gLN@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-93672-4@http.gcc.gnu.org/bugzilla/>
References: <bug-93672-4@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=3D93672

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |ASSIGNED
           Assignee|unassigned at gcc dot gnu.org      |redi at gcc dot gnu=
.org
   Last reconfirmed|                            |2024-04-03
     Ever confirmed|0                           |1

--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Looks like I missed this one when it was filed.

The fix is:

--- a/libstdc++-v3/src/c++98/istream.cc
+++ b/libstdc++-v3/src/c++98/istream.cc
@@ -126,6 +126,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
              const int_type __eof =3D traits_type::eof();
              __streambuf_type* __sb =3D this->rdbuf();
              int_type __c =3D __sb->sgetc();
+             __delim =3D traits_type::to_int_type(__cdelim);

              bool __large_ignore =3D false;
              while (true)=