From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED.blaine.gmane.org!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.devel Subject: Re: Help please! To track down GC trying to free an already freed object. Date: Wed, 03 Apr 2019 07:43:22 +0300 Message-ID: <83zhp7em1h.fsf@gnu.org> References: <20190402112537.GA6212@ACM> <83r2akfnyh.fsf@gnu.org> <20190402204237.GB25792@ACM> Injection-Info: blaine.gmane.org; posting-host="blaine.gmane.org:195.159.176.226"; logging-data="147634"; mail-complaints-to="usenet@blaine.gmane.org" Cc: emacs-devel@gnu.org To: Alan Mackenzie Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Wed Apr 03 06:43:16 2019 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([209.51.188.17]) by blaine.gmane.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:256) (Exim 4.89) (envelope-from ) id 1hBXk2-000cHv-Cu for ged-emacs-devel@m.gmane.org; Wed, 03 Apr 2019 06:43:15 +0200 Original-Received: from localhost ([127.0.0.1]:40079 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1hBXk1-0003yH-Dn for ged-emacs-devel@m.gmane.org; Wed, 03 Apr 2019 00:43:13 -0400 Original-Received: from eggs.gnu.org ([209.51.188.92]:57960) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1hBXjv-0003xs-D3 for emacs-devel@gnu.org; Wed, 03 Apr 2019 00:43:08 -0400 Original-Received: from fencepost.gnu.org ([2001:470:142:3::e]:47726) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1hBXjv-0006TO-8a; Wed, 03 Apr 2019 00:43:07 -0400 Original-Received: from [176.228.60.248] (port=4633 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from ) id 1hBXju-0000rU-O0; Wed, 03 Apr 2019 00:43:07 -0400 In-reply-to: <20190402204237.GB25792@ACM> (message from Alan Mackenzie on Tue, 2 Apr 2019 20:42:37 +0000) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Original-Sender: "Emacs-devel" Xref: news.gmane.org gmane.emacs.devel:234911 Archived-At: > Date: Tue, 2 Apr 2019 20:42:37 +0000 > From: Alan Mackenzie > Cc: emacs-devel@gnu.org > > I'm having some difficult seeing the entire last_marked array with GDB. > I will try to find a solution in the GDB manual. You want "set print elements unlimited", I think. However, my recommendation is to examine the array one element at a time, moving back to the previous one only when you understand what the element you've looked at is and whether it is or isn't related to the problem. Also, last_marked array is written cyclically, so you may need to wrap around the index to see the objects in the right order.