From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Andreas Schwab Newsgroups: gmane.emacs.bugs Subject: bug#27910: 24.5; local-scope; construct list Date: Tue, 01 Aug 2017 17:46:42 +0200 Message-ID: References: <87h8xrlcmu.fsf@hw.i-did-not-set--mail-host-address--so-tickle-me> NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: blaine.gmane.org 1501602439 14819 195.159.176.226 (1 Aug 2017 15:47:19 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Tue, 1 Aug 2017 15:47:19 +0000 (UTC) User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/25.2 (gnu/linux) Cc: 27910-done@debbugs.gnu.org To: hw Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Tue Aug 01 17:47:13 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 1dcZO3-0003OZ-1o for geb-bug-gnu-emacs@m.gmane.org; Tue, 01 Aug 2017 17:47:11 +0200 Original-Received: from localhost ([::1]:43314 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dcZO9-0006ST-4z for geb-bug-gnu-emacs@m.gmane.org; Tue, 01 Aug 2017 11:47:17 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:50465) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dcZNz-0006QR-0H for bug-gnu-emacs@gnu.org; Tue, 01 Aug 2017 11:47:12 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dcZNu-0000NT-3W for bug-gnu-emacs@gnu.org; Tue, 01 Aug 2017 11:47:07 -0400 Original-Received: from debbugs.gnu.org ([208.118.235.43]:34450) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1dcZNu-0000NO-0J for bug-gnu-emacs@gnu.org; Tue, 01 Aug 2017 11:47:02 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1dcZNt-0002JL-Qp for bug-gnu-emacs@gnu.org; Tue, 01 Aug 2017 11:47:01 -0400 Resent-From: Andreas Schwab Original-Sender: "Debbugs-submit" Resent-To: bug-gnu-emacs@gnu.org Resent-Date: Tue, 01 Aug 2017 15:47:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: cc-closed 27910 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: Mail-Followup-To: 27910@debbugs.gnu.org, schwab@suse.de, huwei9527@gmail.com Original-Received: via spool by 27910-done@debbugs.gnu.org id=D27910.15016024068845 (code D ref 27910); Tue, 01 Aug 2017 15:47:01 +0000 Original-Received: (at 27910-done) by debbugs.gnu.org; 1 Aug 2017 15:46:46 +0000 Original-Received: from localhost ([127.0.0.1]:37124 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1dcZNe-0002Ib-0S for submit@debbugs.gnu.org; Tue, 01 Aug 2017 11:46:46 -0400 Original-Received: from mx2.suse.de ([195.135.220.15]:54377 helo=mx1.suse.de) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1dcZNc-0002IT-IT for 27910-done@debbugs.gnu.org; Tue, 01 Aug 2017 11:46:44 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Original-Received: from relay1.suse.de (charybdis-ext.suse.de [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id 58A2DAC94; Tue, 1 Aug 2017 15:46:43 +0000 (UTC) X-Yow: I just bought FLATBUSH from MICKEY MANTLE! In-Reply-To: <87h8xrlcmu.fsf@hw.i-did-not-set--mail-host-address--so-tickle-me> (hw's message of "Tue, 01 Aug 2017 20:02:17 +0800") 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:135221 Archived-At: On Aug 01 2017, hw wrote: > Look at this code: > > (defun test () > "Test" > (setq a '(A)) > (push 'B a) > (nreverse a)) > > (message "%s" (test)) > (message "%s" (test)) > > The result of the code run on my emacs is: > > (A B) > (B A B) > > Since 'a' is a local variable, it is expected to be lke this: This is irrelevant, nreverse is destructively modifying the literal in the function: ELISP> (symbol-function 'test) (lambda nil "Test" (setq a '(A B)) (push 'B a) (nreverse a)) Andreas. -- Andreas Schwab, SUSE Labs, schwab@suse.de GPG Key fingerprint = 0196 BAD8 1CE9 1970 F4BE 1748 E4D4 88E3 0EEA B9D7 "And now for something completely different."