From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.bugs Subject: bug#9948: valgrind warning: Conditional jump or move depends on uninitialised value(s) in redisplay_window Date: Mon, 07 Nov 2011 01:30:50 -0500 Message-ID: References: <4EB766E8.5050908@cs.ucla.edu> <4EB775F6.40405@cs.ucla.edu> Reply-To: Eli Zaretskii NNTP-Posting-Host: lo.gmane.org X-Trace: dough.gmane.org 1320647482 31595 80.91.229.12 (7 Nov 2011 06:31:22 GMT) X-Complaints-To: usenet@dough.gmane.org NNTP-Posting-Date: Mon, 7 Nov 2011 06:31:22 +0000 (UTC) Cc: 9948@debbugs.gnu.org To: Paul Eggert Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Mon Nov 07 07:31:18 2011 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([140.186.70.17]) by lo.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1RNIjl-0000eH-R8 for geb-bug-gnu-emacs@m.gmane.org; Mon, 07 Nov 2011 07:31:17 +0100 Original-Received: from localhost ([::1]:47144 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1RNIjk-0001o5-Lq for geb-bug-gnu-emacs@m.gmane.org; Mon, 07 Nov 2011 01:31:16 -0500 Original-Received: from eggs.gnu.org ([140.186.70.92]:47421) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1RNIji-0001o0-03 for bug-gnu-emacs@gnu.org; Mon, 07 Nov 2011 01:31:14 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1RNIjg-0001Pj-Kp for bug-gnu-emacs@gnu.org; Mon, 07 Nov 2011 01:31:13 -0500 Original-Received: from debbugs.gnu.org ([140.186.70.43]:57818) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1RNIjg-0001Pe-Hz for bug-gnu-emacs@gnu.org; Mon, 07 Nov 2011 01:31:12 -0500 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.69) (envelope-from ) id 1RNImP-0004FF-Um for bug-gnu-emacs@gnu.org; Mon, 07 Nov 2011 01:34:02 -0500 X-Loop: help-debbugs@gnu.org Resent-From: Eli Zaretskii Original-Sender: debbugs-submit-bounces@debbugs.gnu.org Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Mon, 07 Nov 2011 06:34:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 9948 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: Original-Received: via spool by 9948-submit@debbugs.gnu.org id=B9948.132064762416285 (code B ref 9948); Mon, 07 Nov 2011 06:34:01 +0000 Original-Received: (at 9948) by debbugs.gnu.org; 7 Nov 2011 06:33:44 +0000 Original-Received: from localhost ([127.0.0.1] helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1RNIm7-0004Ec-Mx for submit@debbugs.gnu.org; Mon, 07 Nov 2011 01:33:43 -0500 Original-Received: from fencepost.gnu.org ([140.186.70.10]) by debbugs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1RNIm5-0004ES-5C for 9948@debbugs.gnu.org; Mon, 07 Nov 2011 01:33:42 -0500 Original-Received: from eliz by fencepost.gnu.org with local (Exim 4.71) (envelope-from ) id 1RNIjK-000056-8q; Mon, 07 Nov 2011 01:30:50 -0500 In-reply-to: <4EB775F6.40405@cs.ucla.edu> (message from Paul Eggert on Sun, 06 Nov 2011 22:08:54 -0800) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.11 Precedence: list Resent-Date: Mon, 07 Nov 2011 01:34:01 -0500 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6 (newer, 2) X-Received-From: 140.186.70.43 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.org@gnu.org Original-Sender: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.bugs:53647 Archived-At: > Date: Sun, 06 Nov 2011 22:08:54 -0800 > From: Paul Eggert > CC: 9948@debbugs.gnu.org > > SET_TEXT_POS_FROM_MARKER (startp, w->start); > > does not set startp to a valid charpos if w->start > points to uninitialized data. w->startp is the window-start of the window represented by `w'. It is a very important player in displaying the window. If that is uninitialized, we have a much larger catastrophe on our hands than some obscure local variable that _could_ be uninitialized ;-) IOW, if w->startp does not have a valid value, Emacs will crash pronto.