From owner-freebsd-bugs@freebsd.org Sat Nov 16 22:15:52 2019 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 8BEA11AF403 for ; Sat, 16 Nov 2019 22:15:52 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mailman.nyi.freebsd.org (mailman.nyi.freebsd.org [IPv6:2610:1c1:1:606c::50:13]) by mx1.freebsd.org (Postfix) with ESMTP id 47FqL00NdYz4M7L for ; Sat, 16 Nov 2019 22:15:52 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: by mailman.nyi.freebsd.org (Postfix) id 0253A1AF402; Sat, 16 Nov 2019 22:15:52 +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 020F61AF401 for ; Sat, 16 Nov 2019 22:15:52 +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 47FqKz0K6vz4M5Y for ; Sat, 16 Nov 2019 22:15:50 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org (kenobi.freebsd.org [IPv6:2610:1c1:1:606c::50:1d]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 42B688258 for ; Sat, 16 Nov 2019 22:15:50 +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 xAGMFobw012955 for ; Sat, 16 Nov 2019 22:15:50 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id xAGMFogu012954 for bugs@FreeBSD.org; Sat, 16 Nov 2019 22:15:50 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 242013] matching back references works only some of the time Date: Sat, 16 Nov 2019 22:15:50 +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: 12.0-RELEASE X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Some People X-Bugzilla-Who: khellman@mcprogramming.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: Sat, 16 Nov 2019 22:15:52 -0000 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D242013 Bug ID: 242013 Summary: matching back references works only some of the time Product: Base System Version: 12.0-RELEASE Hardware: Any OS: Any Status: New Severity: Affects Some People Priority: --- Component: bin Assignee: bugs@FreeBSD.org Reporter: khellman@mcprogramming.com Matching back references according to re_format(7): Finally, there is one new type of atom, a back reference: =E2=80=98\=E2=80=99 followed by a non-zero decimal d= igit d matches the same sequence of characters matched by the dth parenthesized subexpression (numbering subexpressions by the positions of their open= ing parentheses, left to right), so that (e.g.) =E2=80=98\([bc]\)\1=E2=80= =99 matches =E2=80=98bb=E2=80=99 or =E2=80=98cc=E2=80=99 but not =E2=80=98bc=E2=80=99. does not always seem to work. For instance, I would expect all of these=20 to print the single input line: $ echo '#20#20' | sed -n -E -e '/(#|0x)(..)\1\2/p' $ echo '#2020#' | sed -n -E -e '/(#|0x)(..)\2\1/p' $ echo '#202020' | sed -n -E -e '/(#|0x)(..)20\2/p' #202020 $ echo '#202020' | sed -n -E -e '/(#|0x)(..)\2(20)/p' $ echo '#202020' | sed -n -E -e '/(#|0x)(..)(20)\2/p' #202020 $ echo '#202020' | sed -n -E -e '/(#|0x)(..)..\2/p' #202020 $ echo '#20#20' | sed -n -E -e '/(#|0x)(..).\2/p' #20#20 Additionally, gsed(1) equivalent invocations work as expected. --=20 You are receiving this mail because: You are the assignee for the bug.=