Received: from malur.postgresql.org ([217.196.149.56])
	by arkaria.postgresql.org with esmtps  (TLS1.3) tls
 TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384
	(Exim 4.94.2)
	(envelope-from <pgsql-bugs-owner+archive@lists.postgresql.org>)
	id 1tBbkP-004xFX-Mp
	for pgsql-bugs@arkaria.postgresql.org; Thu, 14 Nov 2024 15:27:05 +0000
Received: from localhost ([127.0.0.1] helo=malur.postgresql.org)
	by malur.postgresql.org with esmtp (Exim 4.94.2)
	(envelope-from <pgsql-bugs-owner+archive@lists.postgresql.org>)
	id 1tBbkM-005DaA-8b
	for pgsql-bugs@arkaria.postgresql.org; Thu, 14 Nov 2024 15:27:02 +0000
Received: from magus.postgresql.org ([2a02:c0:301:0:ffff::29])
	by malur.postgresql.org with esmtps  (TLS1.3) tls
 TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384
	(Exim 4.94.2)
	(envelope-from <tgl@sss.pgh.pa.us>)
	id 1tBbjI-005B7O-SX
	for pgsql-bugs@lists.postgresql.org; Thu, 14 Nov 2024 15:25:57 +0000
Received: from sss.pgh.pa.us ([68.162.161.243])
	by magus.postgresql.org with esmtps  (TLS1.3) tls
 TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384
	(Exim 4.94.2)
	(envelope-from <tgl@sss.pgh.pa.us>)
	id 1tBbjB-001v6G-Mo
	for pgsql-bugs@lists.postgresql.org; Thu, 14 Nov 2024 15:25:56 +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 4AEFPmO21936219;
	Thu, 14 Nov 2024 10:25:48 -0500
From: Tom Lane <tgl@sss.pgh.pa.us>
To: dhyan@nataraj.su
cc: pgsql-bugs@lists.postgresql.org
Subject: Re: BUG #18708: regex problem: (?:[^\d\D]){0} asserts with "lp->nouts
 == 0 && rp->nins == 0"
In-reply-to: <18708-f94f2599c9d2c005@postgresql.org>
References: <18708-f94f2599c9d2c005@postgresql.org>
Comments: In-reply-to PG Bug reporting form <noreply@postgresql.org>
	message dated "Thu, 14 Nov 2024 12:29:12 +0000"
MIME-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Content-ID: <1936217.1731597948.1@sss.pgh.pa.us>
Date: Thu, 14 Nov 2024 10:25:48 -0500
Message-ID: <1936218.1731597948@sss.pgh.pa.us>
List-Id: <pgsql-bugs.lists.postgresql.org>
List-Help: <https://lists.postgresql.org/manage/>
List-Subscribe: <https://lists.postgresql.org/manage/>
List-Post: <mailto:pgsql-bugs@lists.postgresql.org>
List-Owner: <mailto:pgsql-bugs-owner@lists.postgresql.org>
List-Archive: <https://www.postgresql.org/list/pgsql-bugs>
Archived-At: 
 <https://www.postgresql.org/message-id/1936218.1731597948%40sss.pgh.pa.us>
Precedence: bulk

PG Bug reporting form <noreply@postgresql.org> writes:
> If you run 
> SELECT '' ~ '(?:[^\d\D]){0}'; 
> it will assert with  "lp->nouts == 0 && rp->nins == 0"
> This behavior have been introduced in 2a0af7fe460 commit.

Thanks for the report --- I'll dig into this later.

			regards, tom lane