From unknown Tue Jun 17 20:10:32 2025 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-Mailer: MIME-tools 5.509 (Entity 5.509) Content-Type: text/plain; charset=utf-8 From: bug#73598 <73598@debbugs.gnu.org> To: bug#73598 <73598@debbugs.gnu.org> Subject: Status: bug in sed Invalid preceding regular expression Reply-To: bug#73598 <73598@debbugs.gnu.org> Date: Wed, 18 Jun 2025 03:10:32 +0000 retitle 73598 bug in sed Invalid preceding regular expression reassign 73598 sed submitter 73598 Peter Smulders severity 73598 normal thanks From debbugs-submit-bounces@debbugs.gnu.org Wed Oct 02 08:59:54 2024 Received: (at submit) by debbugs.gnu.org; 2 Oct 2024 12:59:54 +0000 Received: from localhost ([127.0.0.1]:56861 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1svyxN-0006x2-EI for submit@debbugs.gnu.org; Wed, 02 Oct 2024 08:59:54 -0400 Received: from lists.gnu.org ([209.51.188.17]:52290) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1svw8d-0005Mi-Tj for submit@debbugs.gnu.org; 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Wed, 02 Oct 2024 11:59:09 +0200 X-Env-Mailfrom: p.j.m.smulders@home.nl X-Env-Rcptto: bug-sed@gnu.org X-SourceIP: 84.27.25.183 X-CNFS-Analysis: v=2.4 cv=XPJiShhE c=1 sm=1 tr=0 ts=66fd196d cx=a_exe a=MosmSTqDC2BNoylIkaMlGg==:117 a=MosmSTqDC2BNoylIkaMlGg==:17 a=IkcTkHD0fZMA:10 a=mDV3o1hIAAAA:8 a=7_Dx1IGeYyKHmItFmuwA:9 a=QEXdDO2ut3YA:10 a=dI9p-avQWAUA:10 a=Qa5mF1pL4RGubZTfelf8:22 X-Authenticated-Sender: p.j.m.smulders@home.nl DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=home.nl; s=202002corplgsmtpnl; t=1727863149; bh=54QzIq3Q9v0cFK+iEky/p+BvylR8ughPWW7NbiWumfk=; h=Date:To:From:Subject; b=D1ydJ99LCyvuIt8a07XSY77JAzb9ptiAMWDstOKPyvhzhlVY07cn6ozQRFtbt4aek 3YquPIVHVX+sPjijWtVewKGH77r2LxH2o8gr53Q1V3U6qTe9o5EgkcxBxRzmdFk7B9 ZUFxkUne5RQwcvUN+TsIK4fpA8EXe8CNwoAUImtHjNbhmeRAZV9skqRVCxxxPU8E37 4UZ1jd93AhI925+zBzDvqFy2V7bQ/9mhmYy38v+DgwUjQWU5qdqTFLVWTTWhTP/Q7g V8xsGHwGqzM8G5evKtBzIRpTMT4TLyIgTkLHiv/xDaYAyoSWg47qXE1sS2s4kHIjxs QNkrQFeKt1NjQ== Message-ID: <3fed214b-d2d2-443b-be3d-7ff868f6969e@home.nl> Date: Wed, 2 Oct 2024 11:59:09 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Content-Language: nl To: bug-sed@gnu.org From: Peter Smulders Subject: bug in sed Invalid preceding regular expression Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-CMAE-Envelope: MS4xfMNlmAeD0Tz25eAjpOwKCnEMfVn0uT00RP6dukNxeGHNTfRSwxMdaQQgfqXitJB+H4sETMb7ppgMAuyHm9sOSNj8FyzFbnpsWC18TpLr2QtU6aqIcHGQ KlFQYtgbBIVHJ2k7bILZ+FxNyiRzRH9UqwU2xAg54B3B4WgPgSwvu/sokOKxE47N0Y56pNlt4plG7g== Received-SPF: pass client-ip=84.116.50.17; envelope-from=p.j.m.smulders@home.nl; helo=csmtpq2-prd-nl1-vfz.edge.unified.services X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, RCVD_IN_VALIDITY_CERTIFIED_BLOCKED=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-Spam-Score: -1.3 (-) X-Debbugs-Envelope-To: submit X-Mailman-Approved-At: Wed, 02 Oct 2024 08:59:52 -0400 X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: -2.3 (--) I expect the command line echo ****some string | sed s/\*\*\*\*// to strip the *'s and result in some string However I get the error message: sed: -e expression #1, char 8: Invalid preceding regular expression ----- When the sed command is taken from a file it works as expected: $ echo ****some string | sed -f script some string where file script consists of the line s/\*\*\*\*// --- The problem shows in: $ sed --version sed (GNU sed) 4.9 Copyright (C) 2022 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later . This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Written by Jay Fenlason, Tom Lord, Ken Pizzini, Paolo Bonzini, Jim Meyering, and Assaf Gordon. This sed program was built without SELinux support. GNU sed home page: . General help using GNU software: . E-mail bug reports to: . ---- an older version does not have this problem ( GNU sed version 3.02 ) best regards, Peter Smulders From debbugs-submit-bounces@debbugs.gnu.org Wed Oct 02 09:23:20 2024 Received: (at submit) by debbugs.gnu.org; 2 Oct 2024 13:23:20 +0000 Received: from localhost ([127.0.0.1]:56877 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1svzK4-0008Im-2s for submit@debbugs.gnu.org; Wed, 02 Oct 2024 09:23:20 -0400 Received: from lists.gnu.org ([209.51.188.17]:50398) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1svzK1-0008IX-Na for submit@debbugs.gnu.org; Wed, 02 Oct 2024 09:23:18 -0400 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 1svzJx-0004qs-8H for bug-sed@gnu.org; Wed, 02 Oct 2024 09:23:13 -0400 Received: from mout.gmx.net ([212.227.15.15]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1svzJv-0007WA-4D for bug-sed@gnu.org; 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envelope-from=dave_br@gmx.com; helo=mout.gmx.net X-Spam_score_int: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, RCVD_IN_VALIDITY_CERTIFIED_BLOCKED=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-Spam-Score: -1.3 (-) X-Debbugs-Envelope-To: submit X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: -2.3 (--) On Wed, 2 Oct 2024 11:59:09 +0200, Peter Smulders wrote: > I expect the command line > > echo ****some string | sed s/\*\*\*\*// > > to strip the *'s and result in > > some string > > However I get the error message: > > sed: -e expression #1, char 8: Invalid preceding regular expression > > ----- > > When the sed command is taken from a file it works as expected: > > $ echo ****some string | sed -f script > some string > > where file script consists of the line > s/\*\*\*\*// > In the command line version, the shell is stripping away your backslashes. So you want: echo ****some string | sed 's/\*\*\*\*//' =2D- D. From debbugs-submit-bounces@debbugs.gnu.org Wed Oct 02 11:20:32 2024 Received: (at 73598) by debbugs.gnu.org; 2 Oct 2024 15:20:32 +0000 Received: from localhost ([127.0.0.1]:58998 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1sw19T-00076h-JS for submit@debbugs.gnu.org; Wed, 02 Oct 2024 11:20:32 -0400 Received: from csmtpq4-prd-nl1-vfz.edge.unified.services ([84.116.50.10]:52343) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1sw0gq-0005Of-QF for 73598@debbugs.gnu.org; Wed, 02 Oct 2024 10:50:57 -0400 Received: from csmtp3-prd-nl1-vfz.nl1.unified.services ([100.107.80.136] helo=csmtp3-prd-nl1-vfz.edge.unified.services) by csmtpq4-prd-nl1-vfz.edge.unified.services with esmtp (Exim 4.93) (envelope-from ) id 1sw0gj-00ECbg-1P for 73598@debbugs.gnu.org; Wed, 02 Oct 2024 16:50:49 +0200 Received: from [192.168.178.136] ([84.27.25.183]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 256/256 bits) (Client did not present a certificate) by csmtp3-prd-nl1-vfz.edge.unified.services with ESMTPSA id w0gisJC8O5TFiw0gisprIf; Wed, 02 Oct 2024 16:50:49 +0200 X-Env-Mailfrom: p.j.m.smulders@home.nl X-Env-Rcptto: 73598@debbugs.gnu.org X-SourceIP: 84.27.25.183 X-CNFS-Analysis: v=2.4 cv=WIEtXWsR c=1 sm=1 tr=0 ts=66fd5dc9 cx=a_exe a=MosmSTqDC2BNoylIkaMlGg==:117 a=MosmSTqDC2BNoylIkaMlGg==:17 a=IkcTkHD0fZMA:10 a=mDV3o1hIAAAA:8 a=8Y624AM3SWLfBmSsJn0A:9 a=3ZKOabzyN94A:10 a=QEXdDO2ut3YA:10 X-Authenticated-Sender: p.j.m.smulders@home.nl DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=home.nl; s=202002corplgsmtpnl; t=1727880649; bh=wBxdeF3rowAKCYYQndxS0FL27t32TM+OCyfoOl5+eY8=; h=Date:Subject:To:References:From:In-Reply-To; b=lA7UFH4aPwYt2TtkLbS032T92/prKiYMrXO2y5AEe7nffvNWh6wMqMA+N6zq1x2yI /i9BOSqVlYdpdSWDxY/ni2jjLnbcd4RE6DWj4NGQL7HcEzFdtZ9udtkZr9xyD1MQyE 1iTv4Rih3aKDEIfqtxyVC1bW1kNwgXqcwu8K8h0JVCxeaJLZ4xRQaEyHoHCPqn3QfG ADBm9ELj/7whw0lGCarF052L0MDfENL0Ita54iwwkq7rOQLbNi9GErTgn4wrMEwd1A 7v3jEtEhYGRaKLhDSOyfT7PdACsZbtTYmQ9I4CR67hoHCCgOoemSYbuWrr5nn4FCbf PXgz2D/jKz2fQ== Message-ID: <604cd4be-55bc-480a-9c2e-0ad9faec2945@home.nl> Date: Wed, 2 Oct 2024 16:50:47 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: bug#73598: Acknowledgement (bug in sed Invalid preceding regular expression) Content-Language: nl To: 73598@debbugs.gnu.org References: <3fed214b-d2d2-443b-be3d-7ff868f6969e@home.nl> From: Peter Smulders In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-CMAE-Envelope: MS4xfNs1DzT43JW0475V9GKIub2NxlwKwoYBhzgE2zjRUFBImbGp0rd0/t28ECeTZ0nSqvzvzw6rif4H12C9YLUdoch5UZOm2gYDpeinIzTCd+gr3qXAmXge Jh2mCWGUx4SZQrtAel9AE+MPQhKYk5+P+AFUm4wu8Fl+ru5RYvnG8ltCqTMHIYqL18u9Myfb/eVHzvKquxaAn6n/ltc8MO0NYx8= X-Spam-Score: 0.0 (/) X-Debbugs-Envelope-To: 73598 X-Mailman-Approved-At: Wed, 02 Oct 2024 11:20:22 -0400 X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: -1.0 (-) I think I know already what is the matter. For to work properly double escapes are needed, i.e.  echo ****some string | sed s/\\*\\*\\*\\*// But I still find it strange ... On 2-10-2024 15:00, GNU bug Tracking System wrote: > Thank you for filing a new bug report with debbugs.gnu.org. > > This is an automatically generated reply to let you know your message > has been received. > > Your message is being forwarded to the package maintainers and other > interested parties for their attention; they will reply in due course. > > Your message has been sent to the package maintainer(s): > bug-sed@gnu.org > > If you wish to submit further information on this problem, please > send it to 73598@debbugs.gnu.org. > > Please do not send mail to help-debbugs@gnu.org unless you wish > to report a problem with the Bug-tracking system. > From debbugs-submit-bounces@debbugs.gnu.org Fri Oct 11 06:38:12 2024 Received: (at 73598) by debbugs.gnu.org; 11 Oct 2024 10:38:12 +0000 Received: from localhost ([127.0.0.1]:33594 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1szD2A-0001lV-Ra for submit@debbugs.gnu.org; Fri, 11 Oct 2024 06:38:12 -0400 Received: from csmtpq4-prd-nl1-vfz.edge.unified.services ([84.116.50.10]:21647) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1szCKz-0007kL-OL for 73598@debbugs.gnu.org; Fri, 11 Oct 2024 05:53:36 -0400 Received: from csmtp5-prd-nl1-vfz.nl1.unified.services ([100.107.80.68] helo=csmtp5-prd-nl1-vfz.edge.unified.services) by csmtpq4-prd-nl1-vfz.edge.unified.services with esmtp (Exim 4.93) (envelope-from ) id 1szCKg-00GOlj-01 for 73598@debbugs.gnu.org; Fri, 11 Oct 2024 11:53:14 +0200 Received: from [192.168.178.136] ([84.27.25.183]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 256/256 bits) (Client did not present a certificate) by csmtp5-prd-nl1-vfz.edge.unified.services with ESMTPSA id zCKfshssgSJu7zCKfsqjLu; Fri, 11 Oct 2024 11:53:13 +0200 X-Env-Mailfrom: p.j.m.smulders@home.nl X-Env-Rcptto: 73598@debbugs.gnu.org X-SourceIP: 84.27.25.183 X-CNFS-Analysis: v=2.4 cv=CMN4XgrD c=1 sm=1 tr=0 ts=6708f589 cx=a_exe a=MosmSTqDC2BNoylIkaMlGg==:117 a=MosmSTqDC2BNoylIkaMlGg==:17 a=IkcTkHD0fZMA:10 a=mDV3o1hIAAAA:8 a=BUytbUPsL9HYeBH5004A:9 a=3ZKOabzyN94A:10 a=QEXdDO2ut3YA:10 X-Authenticated-Sender: p.j.m.smulders@home.nl DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=home.nl; s=202002corplgsmtpnl; t=1728640393; bh=GANuSF6nrBcc0tvcCR/jOKyQWzUWIBFSaEh3wNN/Tyw=; h=Date:From:Subject:To:References:In-Reply-To; b=Oy7lUnYxpFJtfAXsRp6u43STAHSN2XwDuRakMAC4qEPn3Ju9KWX6ZjlIYywR/ZVAw nDKXXObBGTEnlSbuSnGHf17XxVP7o6EU8NHROcGeZZrJ9BFGQyfi6DQczlaIa2g6kW DjsK/Slr1uJqndJMKbIbbCE8WowZ7Nh6rTYIePHmcxVrD0Ag8j8f2DQXUJlOYqpcg8 EL7iWZ5EcAQTyqqrZly4f53bxcGoZIkxNo5cdsogsu2KK7Gni3xf7pI7W8f0mxGo1T VXQVWgm8bP8AGrgx5W8xooh71qyxT9hQaaqxmoO7t8Kd7iSbSps2c3j98qKmIsFa5E B3ivlHYoezt1A== Message-ID: <4f94bb14-2444-4194-ae09-1f71a8cce092@home.nl> Date: Fri, 11 Oct 2024 11:53:13 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird From: Peter Smulders Subject: Re: bug#73598: Acknowledgement (bug in sed Invalid preceding regular expression) To: 73598@debbugs.gnu.org References: <3fed214b-d2d2-443b-be3d-7ff868f6969e@home.nl> <604cd4be-55bc-480a-9c2e-0ad9faec2945@home.nl> Content-Language: nl In-Reply-To: <604cd4be-55bc-480a-9c2e-0ad9faec2945@home.nl> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-CMAE-Envelope: MS4xfPHn6X5r099J3wWuv/9HvRUIH9XjSvfp5clJ1/bX531qleAcuOIlg8y2xCgWHFXJup76So+HWrAnnTdAx91CiY/N7mT8b8wHv8UX+SsSqVGTYpeqbQFt 3+2qnY6CEIdivjczP6irylAa0LVVmrjPRtKbQ2q1Fp0rIUh3TrXv56rmEtgUOCsyTcI/70rlHOTI7TjzIkfOQqQ8OxR3w6n9R6s= X-Spam-Score: 0.0 (/) X-Debbugs-Envelope-To: 73598 X-Mailman-Approved-At: Fri, 11 Oct 2024 06:38:06 -0400 X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: -1.0 (-) Some further observations regarding the behaviour of regular expressions in 'sed' as noticed before  the following is not accepted $ echo ****somestring | sed s/\*\*\*\*// sed: -e expression #1, char 8: Invalid preceding regular expression but the following does $ echo ****somestring | sed s/\\*\\*\\*\\*// somestring However, even this does not work anymore if the command is surrounded by backquotes. e.g. $ name=`echo ****some string | sed s/\\*\\*\\*\\*//` sed: -e expression #1, char 8: Invalid preceding regular expression On the other hand the equivalent using $() is ok: $ name=$(echo ****some string | sed s/\\*\\*\\*\\*//) $ echo $name some string On 2-10-2024 16:50, Peter Smulders wrote: > I think I know already what is the matter. For to work properly double > escapes are needed, i.e. > >  echo ****some string | sed s/\\*\\*\\*\\*// > > But I still find it strange ... > > On 2-10-2024 15:00, GNU bug Tracking System wrote: >> Thank you for filing a new bug report with debbugs.gnu.org. >> >> This is an automatically generated reply to let you know your message >> has been received. >> >> Your message is being forwarded to the package maintainers and other >> interested parties for their attention; they will reply in due course. >> >> Your message has been sent to the package maintainer(s): >> bug-sed@gnu.org >> >> If you wish to submit further information on this problem, please >> send it to 73598@debbugs.gnu.org. >> >> Please do not send mail to help-debbugs@gnu.org unless you wish >> to report a problem with the Bug-tracking system. >>