From unknown Fri Aug 08 22:16:16 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#25402 <25402@debbugs.gnu.org> To: bug#25402 <25402@debbugs.gnu.org> Subject: Status: Race condition in "colors" test Reply-To: bug#25402 <25402@debbugs.gnu.org> Date: Sat, 09 Aug 2025 05:16:16 +0000 retitle 25402 Race condition in "colors" test reassign 25402 diffutils submitter 25402 Santiago Vila severity 25402 normal thanks From debbugs-submit-bounces@debbugs.gnu.org Sun Jan 08 17:36:11 2017 Received: (at submit) by debbugs.gnu.org; 8 Jan 2017 22:36:11 +0000 Received: from localhost ([127.0.0.1]:47191 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1cQM4R-0006fJ-6e for submit@debbugs.gnu.org; Sun, 08 Jan 2017 17:36:11 -0500 Received: from eggs.gnu.org ([208.118.235.92]:36457) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1cQM4Q-0006f4-0D for submit@debbugs.gnu.org; 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Sun, 8 Jan 2017 23:35:09 +0100 (CET) Received: from zproxy02.unex.es ([127.0.0.1]) by localhost (zproxy02.servicios.unex.es [127.0.0.1]) (amavisd-new, port 10032) with ESMTP id hqGNKcT75Eh8; Sun, 8 Jan 2017 23:35:09 +0100 (CET) Received: from localhost (localhost [127.0.0.1]) by zproxy02.unex.es (Postfix) with ESMTP id 6951261007; Sun, 8 Jan 2017 23:35:09 +0100 (CET) X-Virus-Scanned: amavisd-new at zproxy02.siue Received: from zproxy02.unex.es ([127.0.0.1]) by localhost (zproxy02.servicios.unex.es [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id nSdOnXc_HkfD; Sun, 8 Jan 2017 23:35:09 +0100 (CET) Received: from cantor.unex.es (cantor.unex.es [158.49.50.20]) by zproxy02.unex.es (Postfix) with ESMTPSA id 3FAD260EC9; Sun, 8 Jan 2017 23:35:09 +0100 (CET) Received: by cantor.unex.es (Postfix, from userid 1000) id E0080612A8; Sun, 8 Jan 2017 23:35:08 +0100 (CET) Received: from localhost (localhost [127.0.0.1]) by cantor.unex.es (Postfix) with ESMTP id D1974612A5; Sun, 8 Jan 2017 23:35:08 +0100 (CET) Date: Sun, 8 Jan 2017 23:35:08 +0100 (CET) From: Santiago Vila To: bug-diffutils@gnu.org Subject: Race condition in "colors" test Message-ID: User-Agent: Alpine 2.20 (DEB 67 2015-01-07) X-Debbugs-Cc: sanvila@unex.es,debian.axhn@manchmal.in-ulm.de MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6.x X-Received-From: 2001:4830:134:3::11 X-Spam-Score: -4.0 (----) X-Debbugs-Envelope-To: submit Cc: debian.axhn@manchmal.in-ulm.de 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: -4.0 (----) Hello. The test suite for diffutils 3.5 has a tendency to fail in our ppc64el architecture: https://buildd.debian.org/status/logs.php?pkg=diffutils&ver=1%3A3.5-2&arch=ppc64el According to Christoph Biedl (Cc:ed), there is a race condition here: | mkfifo fifo | printf '%*s-a' 1000000 > a | head -c 10 < fifo > /dev/null & + diff --color=always ---presume-output-tty a b > fifo | test $? = 141 || fail=1 Quoting Christoph: > There is a race condition involved, it fails in about three of > four attempts - but not at all if the test is run under strace. > A "sleep 0.1" before the diff made the test pass in ten of ten > attempts. So the reason might indeed be the head command hasn't opened > fifo yet by the time diff tries to write to it. For the Debian package, I am going to add a "sleep 1" (slightly more portable), but Christoph points out that this should not really be architecture specific. Thanks. From debbugs-submit-bounces@debbugs.gnu.org Sun Aug 29 03:19:22 2021 Received: (at control) by debbugs.gnu.org; 29 Aug 2021 07:19:22 +0000 Received: from localhost ([127.0.0.1]:55435 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1mKF6A-0001PT-A4 for submit@debbugs.gnu.org; Sun, 29 Aug 2021 03:19:22 -0400 Received: from zimbra.cs.ucla.edu ([131.179.128.68]:38792) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1mKF68-0001PE-6J for control@debbugs.gnu.org; Sun, 29 Aug 2021 03:19:21 -0400 Received: from localhost (localhost [127.0.0.1]) by zimbra.cs.ucla.edu (Postfix) with ESMTP id 1F1C0160071 for ; Sun, 29 Aug 2021 00:19:14 -0700 (PDT) Received: from zimbra.cs.ucla.edu ([127.0.0.1]) by localhost (zimbra.cs.ucla.edu [127.0.0.1]) (amavisd-new, port 10032) with ESMTP id dwIFJQCq4pVB for ; Sun, 29 Aug 2021 00:19:13 -0700 (PDT) Received: from localhost (localhost [127.0.0.1]) by zimbra.cs.ucla.edu (Postfix) with ESMTP id 6E257160105 for ; Sun, 29 Aug 2021 00:19:13 -0700 (PDT) X-Virus-Scanned: amavisd-new at zimbra.cs.ucla.edu Received: from zimbra.cs.ucla.edu ([127.0.0.1]) by localhost (zimbra.cs.ucla.edu [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id XhLpFBGWDIJp for ; Sun, 29 Aug 2021 00:19:13 -0700 (PDT) Received: from [192.168.1.9] (cpe-172-91-119-151.socal.res.rr.com [172.91.119.151]) by zimbra.cs.ucla.edu (Postfix) with ESMTPSA id 06AC0160102 for ; Sun, 29 Aug 2021 00:19:13 -0700 (PDT) To: control@debbugs.gnu.org From: Paul Eggert Subject: 25402 is same as 36488 Organization: UCLA Computer Science Department Message-ID: <99c1a105-c057-8b36-f6bd-b8932c8f8787@cs.ucla.edu> Date: Sun, 29 Aug 2021 00:19:12 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.11.0 MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit X-Spam-Score: -2.3 (--) X-Debbugs-Envelope-To: control 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: -3.3 (---) merge 25402 36488 From unknown Fri Aug 08 22:16:16 2025 Received: (at fakecontrol) by fakecontrolmessage; To: internal_control@debbugs.gnu.org From: Debbugs Internal Request Subject: Internal Control Message-Id: Did not alter fixed versions and reopened. Date: Sun, 29 Aug 2021 21:50:02 +0000 User-Agent: Fakemail v42.6.9 # This is a fake control message. # # The action: # Did not alter fixed versions and reopened. thanks # This fakemail brought to you by your local debbugs # administrator