From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Stefan Monnier Newsgroups: gmane.emacs.bugs Subject: bug#19324: 25.0.50; add-function and nil Date: Wed, 10 Dec 2014 21:48:51 -0500 Message-ID: References: <87vbllxw05.fsf@gmail.com> <87bnnbt342.fsf@gmail.com> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: ger.gmane.org 1418266169 871 80.91.229.3 (11 Dec 2014 02:49:29 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Thu, 11 Dec 2014 02:49:29 +0000 (UTC) Cc: 19324@debbugs.gnu.org To: Leo Liu Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Thu Dec 11 03:49:21 2014 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 1Xytoe-0003WX-0g for geb-bug-gnu-emacs@m.gmane.org; Thu, 11 Dec 2014 03:49:20 +0100 Original-Received: from localhost ([::1]:48856 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Xytod-0006Yf-Mm for geb-bug-gnu-emacs@m.gmane.org; Wed, 10 Dec 2014 21:49:19 -0500 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:55355) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XytoU-0006Wu-0W for bug-gnu-emacs@gnu.org; Wed, 10 Dec 2014 21:49:17 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1XytoM-00006O-F7 for bug-gnu-emacs@gnu.org; Wed, 10 Dec 2014 21:49:09 -0500 Original-Received: from debbugs.gnu.org ([140.186.70.43]:32790) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XytoM-00006J-Br for bug-gnu-emacs@gnu.org; Wed, 10 Dec 2014 21:49:02 -0500 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.80) (envelope-from ) id 1XytoM-0001PZ-2S for bug-gnu-emacs@gnu.org; Wed, 10 Dec 2014 21:49:02 -0500 X-Loop: help-debbugs@gnu.org Resent-From: Stefan Monnier Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Thu, 11 Dec 2014 02:49:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 19324 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: Original-Received: via spool by 19324-submit@debbugs.gnu.org id=B19324.14182661345409 (code B ref 19324); Thu, 11 Dec 2014 02:49:02 +0000 Original-Received: (at 19324) by debbugs.gnu.org; 11 Dec 2014 02:48:54 +0000 Original-Received: from localhost ([127.0.0.1]:42156 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1XytoE-0001PB-AJ for submit@debbugs.gnu.org; Wed, 10 Dec 2014 21:48:54 -0500 Original-Received: from pruche.dit.umontreal.ca ([132.204.246.22]:51738) by debbugs.gnu.org with esmtp (Exim 4.80) (envelope-from ) id 1XytoD-0001P4-CJ for 19324@debbugs.gnu.org; Wed, 10 Dec 2014 21:48:53 -0500 Original-Received: from ceviche.home (lechon.iro.umontreal.ca [132.204.27.242]) by pruche.dit.umontreal.ca (8.14.1/8.14.1) with ESMTP id sBB2mpeT009455; Wed, 10 Dec 2014 21:48:51 -0500 Original-Received: by ceviche.home (Postfix, from userid 20848) id 5A4CE660F3; Wed, 10 Dec 2014 21:48:51 -0500 (EST) In-Reply-To: <87bnnbt342.fsf@gmail.com> (Leo Liu's message of "Thu, 11 Dec 2014 08:57:33 +0800") User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/25.0.50 (gnu/linux) X-NAI-Spam-Flag: NO X-NAI-Spam-Threshold: 5 X-NAI-Spam-Score: 0 X-NAI-Spam-Rules: 1 Rules triggered RV5151=0 X-NAI-Spam-Version: 2.3.0.9393 : core <5151> : inlines <1625> : streams <1354959> : uri <1838085> 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: 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:97184 Archived-At: > Yes, I had expected this to work and obviously not so filed this bug. > Otherwise it is not a bad workaround. > Go to a buffer in text mode where the default > eldoc-documentation-function is nil and eval > (add-function :around (local 'eldoc-documentation-function) > (lambda (orig) (or (and orig (funcall orig)) (ignore)))) > Move around to get the error. Ah, right, damn: the (local ) causes the insertion of a "proxy function" which runs the global value, but that doesn't check if it's nil. IOW it only works for :override. Stefan