From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.devel Subject: Re: Truncating scroll runs that copy to where we copied to Date: Tue, 22 Nov 2011 01:04:45 -0500 Message-ID: References: <8339dibqlc.fsf@gnu.org> <6D358885-0CD8-4FC0-9598-549AB7E3D4AC@gmail.com> Reply-To: Eli Zaretskii NNTP-Posting-Host: lo.gmane.org X-Trace: dough.gmane.org 1321941895 20694 80.91.229.12 (22 Nov 2011 06:04:55 GMT) X-Complaints-To: usenet@dough.gmane.org NNTP-Posting-Date: Tue, 22 Nov 2011 06:04:55 +0000 (UTC) Cc: mituharu@math.s.chiba-u.ac.jp, emacs-devel@gnu.org To: David Reitter Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Tue Nov 22 07:04:51 2011 Return-path: Envelope-to: ged-emacs-devel@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 1RSjTP-0007um-4B for ged-emacs-devel@m.gmane.org; Tue, 22 Nov 2011 07:04:51 +0100 Original-Received: from localhost ([::1]:44989 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1RSjTO-0000LE-1i for ged-emacs-devel@m.gmane.org; Tue, 22 Nov 2011 01:04:50 -0500 Original-Received: from eggs.gnu.org ([140.186.70.92]:49144) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1RSjTL-0000L9-5N for emacs-devel@gnu.org; Tue, 22 Nov 2011 01:04:48 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1RSjTJ-0000Wo-Pe for emacs-devel@gnu.org; Tue, 22 Nov 2011 01:04:47 -0500 Original-Received: from fencepost.gnu.org ([140.186.70.10]:59528) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1RSjTJ-0000Wk-Mg for emacs-devel@gnu.org; Tue, 22 Nov 2011 01:04:45 -0500 Original-Received: from eliz by fencepost.gnu.org with local (Exim 4.71) (envelope-from ) id 1RSjTJ-0007yO-Hd; Tue, 22 Nov 2011 01:04:45 -0500 In-reply-to: <6D358885-0CD8-4FC0-9598-549AB7E3D4AC@gmail.com> (message from David Reitter on Mon, 21 Nov 2011 18:50:07 -0500) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6 (newer, 3) X-Received-From: 140.186.70.10 X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.14 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-bounces+ged-emacs-devel=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.devel:146132 Archived-At: > From: David Reitter > Date: Mon, 21 Nov 2011 18:50:07 -0500 > Cc: Eli Zaretskii , > emacs-devel@gnu.org > > On Nov 20, 2011, at 7:19 PM, YAMAMOTO Mitsuharu wrote: > > Then, the second line is displayed as `b' instead of `2'. > > Because nobody else replied: I reproduced it easily and was shocked too see this. I have no reasons to believe the test case will not reproduce the problem. The reply that is expected from me is whether the proposed patch is correct or not, and for that it is not enough to confirm that the test case is reproducible. I don't have the answer yet. FWIW, this code was not touched since Emacs 21.1 was released. So evidently the effects of this issue are quite subtle in practice. > Please do fix this bug before the next release. You can help if you explain in more detail what is wrong with the current code. That is what I need to assess the correctness of the patch. I hoped that Yamamoto-san would do that. Failing that, I'll need to figure it out myself, which will take more time, and thus will have to wait a couple of days until I have that time to sit down and look into this. I do intend to do that, make no mistake. > I have, lately, seen an occasional and elusive problem with the display of header lines (or the lack thereof) and am now wondering if this could be due to the same issue. I'll wait and see. It would be better to describe the problem you are seeing, if not a recipe to reproduce it. Alternatively, you could apply the patch and see if those problems disappear.