From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Rafael D Sorkin Newsgroups: gmane.emacs.bugs Subject: bug#27016: possible bug in `defsetf' Date: Mon, 22 May 2017 02:39:28 -0400 Message-ID: Reply-To: Rafael D Sorkin NNTP-Posting-Host: blaine.gmane.org X-Trace: blaine.gmane.org 1495435219 14109 195.159.176.226 (22 May 2017 06:40:19 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Mon, 22 May 2017 06:40:19 +0000 (UTC) Cc: Rafael D Sorkin To: 27016@debbugs.gnu.org Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Mon May 22 08:40:14 2017 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 1dCh0n-0003SR-AZ for geb-bug-gnu-emacs@m.gmane.org; Mon, 22 May 2017 08:40:13 +0200 Original-Received: from localhost ([::1]:40855 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dCh0p-00019x-SB for geb-bug-gnu-emacs@m.gmane.org; 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Mon, 22 May 2017 02:48:28 -0400 (EDT) Original-Received: from rsorkin by mars.pi.local with local (Exim 4.69) (envelope-from ) id 1dCh04-0001Bd-Ec; Mon, 22 May 2017 02:39:28 -0400 X-Mailer: MH-E 8.2; nmh 1.2; GNU Emacs 23.1.1 X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6.x 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:132726 Archived-At: Hi, The second behavior below seems like a bug to me. It was not present in emacs 23.1 Best wishes, Rafael Sorkin emacs-version ; 23.1.1 (setq pair (cons 3 4)) ; (3 . 4) (foobar pair) ; Symbol's function definition is void: foobar (setf (foobar pair) 0) ; No setf-method known for foobar (unless t (defalias 'foobar 'cons) (defsetf foobar setcar)) ; nil (foobar pair) ; same as above (setf (foobar pair) 0) ; same as above pair ; (3 . 4) emacs-version ; 24.5.1 (setq pair (cons 3 4)) ; (3 . 4) (foobar pair) ; Symbol's function definition is void: foobar (setf (foobar pair) 0) ; (foobar pair) is not a valid place expression (unless t (defalias 'foobar 'cons) (defsetf foobar setcar)) ; nil (foobar pair) ; same as above (setf (foobar pair) 0) ; 0 ! pair ; (0 . 4) ! ~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~- Rafael Sorkin Perimeter Institute for Theoretical Physics 31 Caroline Street North Waterloo, ON N2L 2Y5 Canada ~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-~-