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#21750: show-paren-mode erroneously highlights the left margin Date: Sat, 24 Oct 2015 23:07:03 +0300 Message-ID: <83wpucuj2w.fsf@gnu.org> References: Reply-To: Eli Zaretskii NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8BIT X-Trace: ger.gmane.org 1445717308 11064 80.91.229.3 (24 Oct 2015 20:08:28 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Sat, 24 Oct 2015 20:08:28 +0000 (UTC) Cc: 21750@debbugs.gnu.org To: Hinrik =?UTF-8?Q?=C3=96rn_?= =?UTF-8?Q?Sigur=C3=B0sson?= Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Sat Oct 24 22:08:13 2015 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1Zq56o-0003GG-0b for geb-bug-gnu-emacs@m.gmane.org; Sat, 24 Oct 2015 22:08:10 +0200 Original-Received: from localhost ([::1]:45508 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Zq56n-00057N-3C for geb-bug-gnu-emacs@m.gmane.org; Sat, 24 Oct 2015 16:08:09 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:60577) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Zq56j-000572-KS for bug-gnu-emacs@gnu.org; Sat, 24 Oct 2015 16:08:06 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Zq56g-0007oE-Ef for bug-gnu-emacs@gnu.org; Sat, 24 Oct 2015 16:08:05 -0400 Original-Received: from debbugs.gnu.org ([208.118.235.43]:46374) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Zq56g-0007o2-BX for bug-gnu-emacs@gnu.org; Sat, 24 Oct 2015 16:08:02 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.80) (envelope-from ) id 1Zq56g-0007P8-09 for bug-gnu-emacs@gnu.org; Sat, 24 Oct 2015 16:08:02 -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, 24 Oct 2015 20:08:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 21750 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: Original-Received: via spool by 21750-submit@debbugs.gnu.org id=B21750.144571722228388 (code B ref 21750); Sat, 24 Oct 2015 20:08:01 +0000 Original-Received: (at 21750) by debbugs.gnu.org; 24 Oct 2015 20:07:02 +0000 Original-Received: from localhost ([127.0.0.1]:37082 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1Zq55h-0007Na-Ji for submit@debbugs.gnu.org; Sat, 24 Oct 2015 16:07:02 -0400 Original-Received: from mtaout27.012.net.il ([80.179.55.183]:48914) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1Zq55e-0007NM-Am for 21750@debbugs.gnu.org; Sat, 24 Oct 2015 16:06:59 -0400 Original-Received: from conversion-daemon.mtaout27.012.net.il by mtaout27.012.net.il (HyperSendmail v2007.08) id <0NWQ00H00Q3MZY00@mtaout27.012.net.il> for 21750@debbugs.gnu.org; Sat, 24 Oct 2015 23:02:39 +0300 (IDT) Original-Received: from HOME-C4E4A596F7 ([84.94.185.246]) by mtaout27.012.net.il (HyperSendmail v2007.08) with ESMTPA id <0NWQ0075RQCFKAA0@mtaout27.012.net.il>; Sat, 24 Oct 2015 23:02:39 +0300 (IDT) In-reply-to: X-012-Sender: halo1@inter.net.il X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.15 Precedence: list X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x 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-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.bugs:107997 Archived-At: > Date: Sat, 24 Oct 2015 19:28:24 +0200 > From: Hinrik Örn Sigurðsson > > > Hi there. I discovered that under certain conditions, show-paren-mode > will highlight the entire left margin of the window when one of the > parentheses is located at the beginning of a line. If you do "M-x > eval-buffer" on the following code, it will reproduce the issue in > emacs -Q (in both the terminal and GUI): > > (linum-mode) > (custom-set-faces > '(linum ((t (:foreground "black" :weight bold))))) > (show-paren-mode) > > It happens when linum-mode (or nlinum-mode) is active, but only if the > 'linum face has been customized. Attached is a screenshot > demonstrating the overzealous highlighting. I think this is a side effect of the general feature whereby an overlay string "inherits" the face of the surrounding buffer text. It doesn't matter whether the overlay string is displayed in the window's display margin or in the text area. I can understand how this could be unexpected in this particular case, and might look like a bug, but it's actually the display engine functioning as designed. Resetting the face of the overlay string back to the default might disrupt lots of existing code.