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 <pgsql-hackers-owner+archive@lists.postgresql.org>)
	id 1mCmcH-0005AB-If
	for pgsql-hackers@arkaria.postgresql.org; Sun, 08 Aug 2021 17:29:41 +0000
Received: from localhost ([127.0.0.1] helo=malur.postgresql.org)
	by malur.postgresql.org with esmtp (Exim 4.92)
	(envelope-from <pgsql-hackers-owner+archive@lists.postgresql.org>)
	id 1mCmcG-0006bF-Ik
	for pgsql-hackers@arkaria.postgresql.org; Sun, 08 Aug 2021 17:29:40 +0000
Received: from makus.postgresql.org ([2001:4800:3e1:1::229])
	by malur.postgresql.org with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256)
	(Exim 4.92)
	(envelope-from <tgl@sss.pgh.pa.us>)
	id 1mCmcG-0006b6-BN
	for pgsql-hackers@lists.postgresql.org; Sun, 08 Aug 2021 17:29:40 +0000
Received: from sss.pgh.pa.us ([66.207.139.130])
	by makus.postgresql.org with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256)
	(Exim 4.92)
	(envelope-from <tgl@sss.pgh.pa.us>)
	id 1mCmcE-000324-DF
	for pgsql-hackers@postgresql.org; Sun, 08 Aug 2021 17:29:39 +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 178HTaBq3183670;
	Sun, 8 Aug 2021 13:29:36 -0400
From: Tom Lane <tgl@sss.pgh.pa.us>
To: Mark Dilger <mark.dilger@enterprisedb.com>
cc: PostgreSQL-development <pgsql-hackers@postgresql.org>
Subject: Re: Assert triggered during RE_compile_and_cache
In-reply-to: <AB203EEC-6EB0-49BC-9585-736C40104895@enterprisedb.com>
References: <0203588E-E609-43AF-9F4F-902854231EE7@enterprisedb.com>
 <7F9BFA6F-9BC6-4A27-BFA1-2F01682BD644@enterprisedb.com>
 <2426993.1628201727@sss.pgh.pa.us>
 <29C525E6-A912-459F-BE27-217F25F76B5E@enterprisedb.com>
 <2437330.1628205382@sss.pgh.pa.us> <2442241.1628208783@sss.pgh.pa.us>
 <2822987.1628372679@sss.pgh.pa.us> <2860330.1628384606@sss.pgh.pa.us>
 <AB203EEC-6EB0-49BC-9585-736C40104895@enterprisedb.com>
Comments: In-reply-to Mark Dilger <mark.dilger@enterprisedb.com>
	message dated "Sun, 08 Aug 2021 10:15:28 -0700"
MIME-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Content-ID: <3183668.1628443776.1@sss.pgh.pa.us>
Content-Transfer-Encoding: quoted-printable
Date: Sun, 08 Aug 2021 13:29:36 -0400
Message-ID: <3183669.1628443776@sss.pgh.pa.us>
List-Id: <pgsql-hackers.lists.postgresql.org>
List-Help: <https://lists.postgresql.org/manage/>
List-Subscribe: <https://lists.postgresql.org/manage/>
List-Post: <mailto:pgsql-hackers@lists.postgresql.org>
List-Owner: <mailto:pgsql-hackers-owner@lists.postgresql.org>
List-Archive: <https://www.postgresql.org/list/pgsql-hackers>
Archived-At: 
 <https://www.postgresql.org/message-id/3183669.1628443776%40sss.pgh.pa.us>
Precedence: bulk

Mark Dilger <mark.dilger@enterprisedb.com> writes:
> Applying your <alternate-backref-corner-case-fix-1.patch> to master chan=
ges the outcome of some regular expression queries, but I *think* it chang=
es them for the better.

[ squint... ] You sure you applied the patch properly?  All these examples
give me the same results in HEAD (with said patches as-committed) and v13.

			regards, tom lane