From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Michael Welsh Duggan Newsgroups: gmane.emacs.bugs Subject: bug#5060: More debugging information Date: Fri, 27 Nov 2009 23:07:57 -0500 Message-ID: <874oofl2aq.fsf@maru.md5i.com> Reply-To: Michael Welsh Duggan , 5060@emacsbugs.donarmstrong.com NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Trace: ger.gmane.org 1259382462 6241 80.91.229.12 (28 Nov 2009 04:27:42 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Sat, 28 Nov 2009 04:27:42 +0000 (UTC) To: 5060@emacsbugs.donarmstrong.com Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Sat Nov 28 05:27:35 2009 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([199.232.76.165]) by lo.gmane.org with esmtp (Exim 4.50) id 1NEEuE-0007Wc-Pf for geb-bug-gnu-emacs@m.gmane.org; Sat, 28 Nov 2009 05:27:35 +0100 Original-Received: from localhost ([127.0.0.1]:34725 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1NEEuE-0000mU-4h for geb-bug-gnu-emacs@m.gmane.org; Fri, 27 Nov 2009 23:27:34 -0500 Original-Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1NEEuA-0000m8-Hu for bug-gnu-emacs@gnu.org; Fri, 27 Nov 2009 23:27:30 -0500 Original-Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1NEEu5-0000lI-N6 for bug-gnu-emacs@gnu.org; Fri, 27 Nov 2009 23:27:29 -0500 Original-Received: from [199.232.76.173] (port=45301 helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1NEEu5-0000lF-H5 for bug-gnu-emacs@gnu.org; Fri, 27 Nov 2009 23:27:25 -0500 Original-Received: from rzlab.ucr.edu ([138.23.92.77]:33934) by monty-python.gnu.org with esmtps (TLS-1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.60) (envelope-from ) id 1NEEu5-0006aU-38 for bug-gnu-emacs@gnu.org; Fri, 27 Nov 2009 23:27:25 -0500 Original-Received: from rzlab.ucr.edu (rzlab.ucr.edu [127.0.0.1]) by rzlab.ucr.edu (8.14.3/8.14.3/Debian-5) with ESMTP id nAS4RMq0007980; Fri, 27 Nov 2009 20:27:23 -0800 Original-Received: (from debbugs@localhost) by rzlab.ucr.edu (8.14.3/8.14.3/Submit) id nAS4F4Wi006894; Fri, 27 Nov 2009 20:15:04 -0800 Resent-Date: Fri, 27 Nov 2009 20:15:04 -0800 X-Loop: owner@emacsbugs.donarmstrong.com Resent-From: Michael Welsh Duggan Resent-To: bug-submit-list@donarmstrong.com Resent-CC: Emacs Bugs 2Resent-Date: Sat, 28 Nov 2009 04:15:04 +0000 Resent-Message-ID: Resent-Sender: owner@emacsbugs.donarmstrong.com X-Emacs-PR-Message: followup 5060 X-Emacs-PR-Package: emacs X-Emacs-PR-Keywords: Original-Received: via spool by 5060-submit@emacsbugs.donarmstrong.com id=B5060.12593812846361 (code B ref 5060); Sat, 28 Nov 2009 04:15:04 +0000 Original-Received: (at 5060) by emacsbugs.donarmstrong.com; 28 Nov 2009 04:08:04 +0000 X-Spam-Bayes: score:0.5 Bayes not run. spammytokens:Tokens not available. hammytokens:Tokens not available. Original-Received: from maru.md5i.com (md5i.com [75.151.244.229]) by rzlab.ucr.edu (8.14.3/8.14.3/Debian-5) with ESMTP id nAS482ob006358 for <5060@emacsbugs.donarmstrong.com>; Fri, 27 Nov 2009 20:08:04 -0800 Original-Received: from md5i by maru.md5i.com with local (Exim 4.69) (envelope-from ) id 1NEEbF-0005Ht-Bb for 5060@emacsbugs.donarmstrong.com; Fri, 27 Nov 2009 23:07:57 -0500 User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/23.1.50 (gnu/linux) X-detected-operating-system: by monty-python.gnu.org: GNU/Linux 2.6 (newer, 2) Resent-Date: Fri, 27 Nov 2009 23:27:29 -0500 X-BeenThere: bug-gnu-emacs@gnu.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: "Bug reports for GNU Emacs, the Swiss army knife of text editors" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Original-Sender: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.bugs:33006 Archived-At: Shortly before the failure occurs, gdb-frame-handler is called. In the context of the failure, the frame variable is set to: ((line . "29") (file . "longjmp.c") (func . "__libc_siglongjmp") (addr . "0xb79ef6c1") (level . "0")) gdb-selected-file is nil, since there is no 'fullname. gdb-selected-line gets 29. So, gud-last-frame is '(nil . 29). gud-display-frame is then called, which calls gud-display-line with the args from gud-last frame. I.e., (gud-display-frame nil 29). This nil is what is later causing problems when gud-find-file is called. My guess is that gud-display-frame should not be called if gdb-selected-file is nil. But I do not understand the code well enough to know that this is the case. -- Michael Welsh Duggan (md5i@md5i.com)