From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.bugs Subject: bug#31276: 27.0.50; "Spurious" empty first line from before-string Date: Sat, 28 Apr 2018 17:07:10 +0300 Message-ID: <837eortofl.fsf@gnu.org> References: <83fu3fu0r9.fsf@gnu.org> <838t97tokm.fsf@gnu.org> Reply-To: Eli Zaretskii NNTP-Posting-Host: blaine.gmane.org X-Trace: blaine.gmane.org 1524924367 16998 195.159.176.226 (28 Apr 2018 14:06:07 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Sat, 28 Apr 2018 14:06:07 +0000 (UTC) Cc: 31276@debbugs.gnu.org To: monnier@IRO.UMontreal.CA Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Sat Apr 28 16:06:03 2018 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1fCQUE-0004Fe-7R for geb-bug-gnu-emacs@m.gmane.org; Sat, 28 Apr 2018 16:06:02 +0200 Original-Received: from localhost ([::1]:52269 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fCQWJ-0004Df-6H for geb-bug-gnu-emacs@m.gmane.org; Sat, 28 Apr 2018 10:08:11 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:42329) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fCQWD-0004DP-8n for bug-gnu-emacs@gnu.org; Sat, 28 Apr 2018 10:08:06 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1fCQWA-0004kc-1q for bug-gnu-emacs@gnu.org; Sat, 28 Apr 2018 10:08:05 -0400 Original-Received: from debbugs.gnu.org ([208.118.235.43]:34223) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1fCQW9-0004kW-U3 for bug-gnu-emacs@gnu.org; Sat, 28 Apr 2018 10:08:01 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1fCQW9-0006Jk-Nv for bug-gnu-emacs@gnu.org; Sat, 28 Apr 2018 10:08:01 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Eli Zaretskii Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Sat, 28 Apr 2018 14:08:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 31276 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: Original-Received: via spool by 31276-submit@debbugs.gnu.org id=B31276.152492445624249 (code B ref 31276); Sat, 28 Apr 2018 14:08:01 +0000 Original-Received: (at 31276) by debbugs.gnu.org; 28 Apr 2018 14:07:36 +0000 Original-Received: from localhost ([127.0.0.1]:42120 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1fCQVk-0006J2-BR for submit@debbugs.gnu.org; Sat, 28 Apr 2018 10:07:36 -0400 Original-Received: from eggs.gnu.org ([208.118.235.92]:51238) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1fCQVj-0006Ip-Dl for 31276@debbugs.gnu.org; Sat, 28 Apr 2018 10:07:35 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1fCQVb-0004R1-7o for 31276@debbugs.gnu.org; Sat, 28 Apr 2018 10:07:30 -0400 Original-Received: from fencepost.gnu.org ([2001:4830:134:3::e]:53801) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fCQVb-0004Qp-4B; Sat, 28 Apr 2018 10:07:27 -0400 Original-Received: from [176.228.60.248] (port=3751 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from ) id 1fCQVa-0008H9-KA; Sat, 28 Apr 2018 10:07:27 -0400 In-reply-to: <838t97tokm.fsf@gnu.org> (message from Eli Zaretskii on Sat, 28 Apr 2018 17:04:09 +0300) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 208.118.235.43 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" Xref: news.gmane.org gmane.emacs.bugs:145803 Archived-At: > Date: Sat, 28 Apr 2018 17:04:09 +0300 > From: Eli Zaretskii > Cc: 31276@debbugs.gnu.org > > > GNU Emacs > > > > hello > > NEWS ... > > > > i.e. I get a *really* spurious line. This one is clearly a bug. > > Is it? The overlay string starts with a newline, and that's what you > see here. Buffer position 11 is the 'N' of NEWS, and you asked Emacs > to prepend "\nhello\n" to that, which it did. The newline after > "Emacs", which comes from the buffer text, is still visible. So why > is this a bug? Answering myself: there's no newline after "Emacs". So yes, this is a spurious empty line. I will see why that happens.