From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: "Phillip Lord" Newsgroups: gmane.emacs.bugs Subject: bug#26440: seq-mapn fails with circular sequence Date: Tue, 11 Apr 2017 08:12:40 -0000 Message-ID: NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain;charset=utf-8 Content-Transfer-Encoding: 8bit X-Trace: blaine.gmane.org 1491898451 11056 195.159.176.226 (11 Apr 2017 08:14:11 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Tue, 11 Apr 2017 08:14:11 +0000 (UTC) User-Agent: SquirrelMail/1.5.2 [SVN] To: 26440@debbugs.gnu.org Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Tue Apr 11 10:14:07 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 1cxqw9-0002kz-NV for geb-bug-gnu-emacs@m.gmane.org; Tue, 11 Apr 2017 10:14:06 +0200 Original-Received: from localhost ([::1]:37720 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1cxqwF-0006eR-Ln for geb-bug-gnu-emacs@m.gmane.org; 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Original-Received: from [127.0.0.1] (port=51120 helo=cloud103.planethippo.com) by cloud103.planethippo.com with esmtpa (Exim 4.88) (envelope-from ) id 1cxqum-0007Ts-Jx for bug-gnu-emacs@gnu.org; Tue, 11 Apr 2017 08:12:40 +0000 Original-Received: from 92.238.179.168 ([92.238.179.168]) (SquirrelMail authenticated user phillip.lord@russet.org.uk) by cloud103.planethippo.com with HTTP; Tue, 11 Apr 2017 08:12:40 -0000 X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - cloud103.planethippo.com X-AntiAbuse: Original Domain - gnu.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - russet.org.uk X-Get-Message-Sender-Via: cloud103.planethippo.com: authenticated_id: phillip.lord@russet.org.uk X-Authenticated-Sender: cloud103.planethippo.com: phillip.lord@russet.org.uk X-Source: X-Source-Args: X-Source-Dir: X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x [fuzzy] 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:131461 Archived-At: On Emacs-25 circular structures cause seq-mapn not to terminate although the documentation suggest that they should. Consider: (defvar l '(a c d)) (setq l (nconc l l)) (seq-mapn #'cons l '(1)) This should return '((a . 1)) but actually does not terminate. The problem is caused by call to seq-into which includes: (append sequence nil) The problem does exist on trunk which does this instead: (if (listp sequence) sequence (append sequence nil)))