From owner-freebsd-bugs@freebsd.org Tue Feb 4 18:53:13 2020 Return-Path: Delivered-To: freebsd-bugs@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 37AEF22FD6D for ; Tue, 4 Feb 2020 18:53:13 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mailman.nyi.freebsd.org (unknown [127.0.1.3]) by mx1.freebsd.org (Postfix) with ESMTP id 48Bv3F0mpMz4MDC for ; Tue, 4 Feb 2020 18:53:13 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: by mailman.nyi.freebsd.org (Postfix) id 1A80622FD6C; Tue, 4 Feb 2020 18:53:13 +0000 (UTC) Delivered-To: bugs@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 1A48122FD6B for ; Tue, 4 Feb 2020 18:53:13 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) server-signature RSA-PSS (4096 bits) client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 48Bv3D73fMz4MDB for ; Tue, 4 Feb 2020 18:53:12 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org (kenobi.freebsd.org [IPv6:2610:1c1:1:606c::50:1d]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) server-signature RSA-PSS (4096 bits)) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id EDACE1E5B2 for ; Tue, 4 Feb 2020 18:53:12 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org ([127.0.1.5]) by kenobi.freebsd.org (8.15.2/8.15.2) with ESMTP id 014IrCPt030535 for ; Tue, 4 Feb 2020 18:53:12 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id 014IrCdH030534 for bugs@FreeBSD.org; Tue, 4 Feb 2020 18:53:12 GMT (envelope-from bugzilla-noreply@freebsd.org) X-Authentication-Warning: kenobi.freebsd.org: www set sender to bugzilla-noreply@freebsd.org using -f From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 243881] libc++: regex uses truncated pattern if normal character is escaped Date: Tue, 04 Feb 2020 18:53:12 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: new X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: bin X-Bugzilla-Version: 12.1-RELEASE X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Only Me X-Bugzilla-Who: mail@maxlor.com X-Bugzilla-Status: New X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: bugs@FreeBSD.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: bug_id short_desc product version rep_platform op_sys bug_status bug_severity priority component assigned_to reporter Message-ID: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugs.freebsd.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-BeenThere: freebsd-bugs@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 04 Feb 2020 18:53:13 -0000 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D243881 Bug ID: 243881 Summary: libc++: regex uses truncated pattern if normal character is escaped Product: Base System Version: 12.1-RELEASE Hardware: amd64 OS: Any Status: New Severity: Affects Only Me Priority: --- Component: bin Assignee: bugs@FreeBSD.org Reporter: mail@maxlor.com If a pattern in which a normal character is escaped (e.g.: "a\bc"), the lib= c++ that ships with FreeBSD only appears to use the part of the pattern up to t= hat character. Test program: =3D=3D=3D=3D=3D regextest.cpp BEGIN =3D=3D=3D=3D=3D #include #include #include using namespace std; int main() { vector patterns =3D { R"(abc)", R"(a\bc)", R"(a\bx)", R"(a\xc)", R"(x\bc)", }; for (const string &pattern : patterns) { cout << pattern << ": "; try { regex r(pattern, regex::extended); bool match =3D regex_search("abc", r); cout << (match ? "match" : "no match") << endl; } catch (const std::regex_error &e) { cout << "regex error: " << e.what() << endl; } } return 0; } =3D=3D=3D=3D=3D regextest.cpp END =3D=3D=3D=3D=3D expected output: abc: match a\bc: match a\bx: no match a\xc: no match x\bc: no match Incorrect output on FreeBSD 12.1 with system c++ compiler (clang 8.0.1): abc: match a\bc: match a\bx: match a\xc: match x\bc: no match On FreeBSD, gcc9 works correctly, so does clang-8 on Ubuntu, which makes me think this is specific to the FreeBSD system compiler. --=20 You are receiving this mail because: You are the assignee for the bug.=