Received: from malur.postgresql.org ([217.196.149.56]) by arkaria.postgresql.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.89) (envelope-from ) id 1iGEUd-0005wH-0j for pgsql-bugs@arkaria.postgresql.org; Fri, 04 Oct 2019 03:42:59 +0000 Received: from localhost ([127.0.0.1] helo=malur.postgresql.org) by malur.postgresql.org with esmtp (Exim 4.89) (envelope-from ) id 1iGEUa-0000HG-BU for pgsql-bugs@arkaria.postgresql.org; Fri, 04 Oct 2019 03:42:56 +0000 Received: from magus.postgresql.org ([2a02:c0:301:0:ffff::29]) by malur.postgresql.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.89) (envelope-from ) id 1iGEUa-0000H8-3z for pgsql-bugs@lists.postgresql.org; Fri, 04 Oct 2019 03:42:56 +0000 Received: from sss.pgh.pa.us ([66.207.139.130]) by magus.postgresql.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.89) (envelope-from ) id 1iGEUT-0001en-Ma for pgsql-bugs@lists.postgresql.org; Fri, 04 Oct 2019 03:42:55 +0000 Received: from sss1.sss.pgh.pa.us (localhost [127.0.0.1]) by sss.pgh.pa.us (8.14.4/8.14.4) with ESMTP id x943gh8x012362; Thu, 3 Oct 2019 23:42:43 -0400 From: Tom Lane To: Andres Freund cc: =?utf-8?B?0JDQvdGC0L7QvSDQktC70LDRgdC+0LI=?= , pgsql-bugs@lists.postgresql.org Subject: Re: BUG #16036: Segmentation fault while doing an update In-reply-to: <20191004033610.fb47ehgycodogn6w@alap3.anarazel.de> References: <16036-28184c90d952fb7f@postgresql.org> <4E1FB33C-7280-487B-B3D1-D3C247AA9E3D@anarazel.de> <746398E3-F4E1-4F14-A686-3394F27011DC@gmail.com> <20191004032020.se46diwqas43e3tw@alap3.anarazel.de> <11540.1570159561@sss.pgh.pa.us> <20191004033610.fb47ehgycodogn6w@alap3.anarazel.de> Comments: In-reply-to Andres Freund message dated "Thu, 03 Oct 2019 20:36:10 -0700" MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-ID: <12360.1570160563.1@sss.pgh.pa.us> Date: Thu, 03 Oct 2019 23:42:43 -0400 Message-ID: <12361.1570160563@sss.pgh.pa.us> List-Id: List-Help: List-Subscribe: List-Post: List-Owner: List-Archive: Precedence: bulk Andres Freund writes: > Yea, I was wondering about that too - but asking for a slot to be copied > into itself seems to indicate a logic bug more often than not? Expecting > the slots to be independent, afterwards. So I'm a bit hesitant doing so. Oh, good point. The Assert sounds better then. regards, tom lane