Received: from malur.postgresql.org ([217.196.149.56]) by arkaria.postgresql.org with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1nSVCQ-0002XR-PW for pgsql-bugs@arkaria.postgresql.org; Fri, 11 Mar 2022 02:40:14 +0000 Received: from localhost ([127.0.0.1] helo=malur.postgresql.org) by malur.postgresql.org with esmtp (Exim 4.92) (envelope-from ) id 1nSVCP-0007Wi-Ir for pgsql-bugs@arkaria.postgresql.org; Fri, 11 Mar 2022 02:40:13 +0000 Received: from magus.postgresql.org ([2a02:c0:301:0:ffff::29]) by malur.postgresql.org with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1nSVCP-0007Tm-AV for pgsql-bugs@lists.postgresql.org; Fri, 11 Mar 2022 02:40:13 +0000 Received: from sss.pgh.pa.us ([66.207.139.130]) by magus.postgresql.org with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1nSVCN-0000GA-7B for pgsql-bugs@lists.postgresql.org; Fri, 11 Mar 2022 02:40:12 +0000 Received: from sss1.sss.pgh.pa.us (localhost [127.0.0.1]) by sss.pgh.pa.us (8.15.2/8.15.2) with ESMTP id 22B2e526765893; Thu, 10 Mar 2022 21:40:05 -0500 From: Tom Lane To: Andres Freund cc: hubert depesz lubaczewski , PostgreSQL mailing lists Subject: Re: Pg 15 devel crashes when fetching data from table using cursor In-reply-to: <20220311023643.wjfhoi5xbggvmluu@alap3.anarazel.de> References: <20220307094423.GA24798@depesz.com> <20220311005045.vnwb3aa5htilh3rh@alap3.anarazel.de> <20220311023643.wjfhoi5xbggvmluu@alap3.anarazel.de> Comments: In-reply-to Andres Freund message dated "Thu, 10 Mar 2022 18:36:43 -0800" MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-ID: <765891.1646966405.1@sss.pgh.pa.us> Content-Transfer-Encoding: quoted-printable Date: Thu, 10 Mar 2022 21:40:05 -0500 Message-ID: <765892.1646966405@sss.pgh.pa.us> List-Id: List-Help: List-Subscribe: List-Post: List-Owner: List-Archive: Archived-At: Precedence: bulk Andres Freund writes: > interestingly a single row isn't sufficient to trigger it, even if it co= ntains > data to be detoasted... Hah, that explains why I failed to reproduce it a couple days ago. IIRC, I set up a test case with a one-row table :-( But ... how would we get through one row and then fail on the next? regards, tom lane