From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Po Lu via "Bug reports for GNU Emacs, the Swiss army knife of text editors" Newsgroups: gmane.emacs.bugs Subject: bug#52446: 28.0.90; Infinite loop in add_row_entry Date: Sun, 12 Dec 2021 15:36:30 +0800 Message-ID: <87mtl6z341.fsf@yahoo.com> References: <87a6h61k0e.fsf.ref@yahoo.com> <87a6h61k0e.fsf@yahoo.com> <83h7bep9bb.fsf@gnu.org> Reply-To: Po Lu Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="7649"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.0.60 (gnu/linux) Cc: 52446@debbugs.gnu.org To: Eli Zaretskii Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Sun Dec 12 08:37:13 2021 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1mwJQ0-0001oJ-W2 for geb-bug-gnu-emacs@m.gmane-mx.org; 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Sun, 12 Dec 2021 07:36:41 +0000 Original-Received: by kubenode502.mail-prod1.omega.sg3.yahoo.com (VZM Hermes SMTP Server) with ESMTPA ID e9b598709f1249d5ec4605ef5594aec4; Sun, 12 Dec 2021 07:36:35 +0000 (UTC) In-Reply-To: <83h7bep9bb.fsf@gnu.org> (Eli Zaretskii's message of "Sun, 12 Dec 2021 09:32:40 +0200") X-Mailer: WebService/1.1.19415 mail.backend.jedi.jws.acl:role.jedi.acl.token.atz.jws.hermes.yahoo X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-BeenThere: bug-gnu-emacs@gnu.org List-Id: "Bug reports for GNU Emacs, the Swiss army knife of text editors" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Original-Sender: "bug-gnu-emacs" Xref: news.gmane.io gmane.emacs.bugs:222183 Archived-At: Eli Zaretskii writes: >> Resent-From: Po Lu >> Original-Sender: "Debbugs-submit" >> Resent-CC: bug-gnu-emacs@gnu.org >> Resent-Sender: help-debbugs@gnu.org >> Date: Sun, 12 Dec 2021 13:15:29 +0800 >> From: Po Lu via "Bug reports for GNU Emacs, >> the Swiss army knife of text editors" >> >> Emacs froze while I was scrolling through a large image with `C-n'. The >> source of the freeze was an infinite loop in this part of >> `add_row_entry': >> >> while (entry && !row_equal_p (entry->row, row, 1)) >> ---> entry = entry->next; >> >> The problem seems to be that `entry' points to the same address as >> `entry->next'. > Are you sure? This more-or-less "can't happen". How did you see that > this was the problem? I did `p entry' and `p entry->next' in gdb. Both pointed to the same address.