From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on dcvr.yhbt.net X-Spam-Level: X-Spam-ASN: AS22989 209.51.188.0/24 X-Spam-Status: No, score=-3.9 required=3.0 tests=AWL,BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI, RCVD_IN_MSPIKE_H2,SPF_HELO_PASS,SPF_PASS shortcircuit=no autolearn=ham autolearn_force=no version=3.4.6 Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dcvr.yhbt.net (Postfix) with ESMTPS id 76DA91F47C for ; Fri, 13 Jan 2023 07:04:18 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1pGE6o-00077J-1L; Fri, 13 Jan 2023 02:04:14 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1pGE6m-00076e-1k; Fri, 13 Jan 2023 02:04:12 -0500 Received: from smtp.gentoo.org ([2001:470:ea4a:1:5054:ff:fec7:86e4]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_CHACHA20_POLY1305:256) (Exim 4.90_1) (envelope-from ) id 1pGE6k-00065P-CY; Fri, 13 Jan 2023 02:04:11 -0500 Content-Type: multipart/signed; boundary="Apple-Mail=_39F4BD96-3261-45E0-BA13-40E310AD6131"; protocol="application/pgp-signature"; micalg=pgp-sha512 Mime-Version: 1.0 (Mac OS X Mail 16.0 \(3731.300.101.1.3\)) Subject: Re: Clang-built Gawk 5.2.1 regex oddity From: Sam James In-Reply-To: <87bkncy3vl.fsf@aarsen.me> Date: Fri, 13 Jan 2023 07:03:52 +0000 Cc: arnold@skeeve.com, concord@gentoo.org, bug-gawk@gnu.org, Gnulib bugs Message-Id: References: <20221230000119.hyui6umnspuyzqum@bubbles> <202212300913.2BU9DV6V030160@freefriends.org> <6DADB0FC-87EE-4028-91DF-C93A968A8982@gentoo.org> <202301011906.301J6ROQ018104@freefriends.org> <1cdb3d41-d675-cca1-7498-c3840f2ee8ad@cs.ucla.edu> <87bkncy3vl.fsf@aarsen.me> To: =?utf-8?Q?Arsen_Arsenovi=C4=87?= , Paul Eggert X-Mailer: Apple Mail (2.3731.300.101.1.3) Received-SPF: pass client-ip=2001:470:ea4a:1:5054:ff:fec7:86e4; envelope-from=sam@gentoo.org; helo=smtp.gentoo.org X-Spam_score_int: -41 X-Spam_score: -4.2 X-Spam_bar: ---- X-Spam_report: (-4.2 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: bug-gnulib@gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Gnulib discussion list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-gnulib-bounces+normalperson=yhbt.net@gnu.org Sender: bug-gnulib-bounces+normalperson=yhbt.net@gnu.org --Apple-Mail=_39F4BD96-3261-45E0-BA13-40E310AD6131 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=utf-8 > On 5 Jan 2023, at 23:06, Arsen Arsenovi=C4=87 wrote: >=20 > Hi, >=20 > Paul Eggert writes: >=20 >> This is a serious bug in Clang: it generates incorrect machine code. >>=20 >> The code that Clang generates for the following (gawk/support/dfa.c = lines >> 1141-1143): >>=20 >> ((dfa->syntax.dfaopts & DFA_CONFUSING_BRACKETS_ERROR >> ? dfaerror : dfawarn) >> (_("character class syntax is [[:space:]], not [:space:]"))); >>=20 >> is immediately followed by the code generated for the following >> (gawk/support/dfa.c line 1015): >>=20 >> dfaerror (_("invalid character class")); >>=20 >> and this is incorrect because the two source code regions are not = connected >> with each other. >=20 > This is now fixed in Clang: > https://reviews.llvm.org/rGcf8fd210a35c8e93136cb8edc5c6a2e818dc1b1d This is not in 15.0.7 and there won't be any further 15.x releases as = there's an ABI break caused by it. We've backported it in Gentoo but others may = not. It will be in 16.x. I think gnulib should probably make that #define change for Clang < 16. --Apple-Mail=_39F4BD96-3261-45E0-BA13-40E310AD6131 Content-Transfer-Encoding: 7bit Content-Disposition: attachment; filename=signature.asc Content-Type: application/pgp-signature; name=signature.asc Content-Description: Message signed with OpenPGP -----BEGIN PGP SIGNATURE----- iNUEARYKAH0WIQQlpruI3Zt2TGtVQcJzhAn1IN+RkAUCY8ECWV8UgAAAAAAuAChp c3N1ZXItZnByQG5vdGF0aW9ucy5vcGVucGdwLmZpZnRoaG9yc2VtYW4ubmV0MjVB NkJCODhERDlCNzY0QzZCNTU0MUMyNzM4NDA5RjUyMERGOTE5MAAKCRBzhAn1IN+R kIk1AQCdZG/5TDjPFMPQ1HPtQ/ZtAUMTjlXjb8NXOIVJ/cwA/gD/RLC5vU+A4JHi 3hZg0pj5rQ8O+kS2GoXt4uG5PiDUTAo= =J1OL -----END PGP SIGNATURE----- --Apple-Mail=_39F4BD96-3261-45E0-BA13-40E310AD6131--