From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.ciao.gmane.io!not-for-mail From: No Wayman Newsgroups: gmane.emacs.bugs Subject: bug#39805: 28.0.50; scan-sexps (scan_lists) incorrectly parsing circular list Date: Thu, 27 Feb 2020 12:22:34 -0500 Message-ID: <87mu94kkrq.fsf@gmail.com> References: <87wo89ghix.fsf@gmail.com> <87pne0ajy3.fsf@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; format=flowed Injection-Info: ciao.gmane.io; posting-host="ciao.gmane.io:159.69.161.202"; logging-data="93321"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: mu4e 1.3.9; emacs 28.0.50 Cc: 39805@debbugs.gnu.org To: Noam Postavsky Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Thu Feb 27 18:23:40 2020 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1j7Msu-000OA7-Pr for geb-bug-gnu-emacs@m.gmane-mx.org; Thu, 27 Feb 2020 18:23:40 +0100 Original-Received: from localhost ([::1]:35356 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1j7Mst-0008La-P9 for geb-bug-gnu-emacs@m.gmane-mx.org; Thu, 27 Feb 2020 12:23:39 -0500 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:50602) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1j7MsJ-0007kQ-Kf for bug-gnu-emacs@gnu.org; Thu, 27 Feb 2020 12:23:04 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1j7MsI-0006TM-HM for bug-gnu-emacs@gnu.org; Thu, 27 Feb 2020 12:23:03 -0500 Original-Received: from debbugs.gnu.org ([209.51.188.43]:54254) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1j7MsI-0006T8-BH for bug-gnu-emacs@gnu.org; Thu, 27 Feb 2020 12:23:02 -0500 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1j7MsH-0002PA-S8 for bug-gnu-emacs@gnu.org; Thu, 27 Feb 2020 12:23:01 -0500 X-Loop: help-debbugs@gnu.org Resent-From: No Wayman Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Thu, 27 Feb 2020 17:23:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 39805 X-GNU-PR-Package: emacs X-GNU-PR-Keywords: confirmed Original-Received: via spool by 39805-submit@debbugs.gnu.org id=B39805.15828241639209 (code B ref 39805); Thu, 27 Feb 2020 17:23:01 +0000 Original-Received: (at 39805) by debbugs.gnu.org; 27 Feb 2020 17:22:43 +0000 Original-Received: from localhost ([127.0.0.1]:60227 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1j7Mrz-0002OS-0D for submit@debbugs.gnu.org; Thu, 27 Feb 2020 12:22:43 -0500 Original-Received: from mail-qk1-f172.google.com ([209.85.222.172]:45219) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1j7Mrx-0002OF-Bt for 39805@debbugs.gnu.org; Thu, 27 Feb 2020 12:22:41 -0500 Original-Received: by mail-qk1-f172.google.com with SMTP id z12so39779qkg.12 for <39805@debbugs.gnu.org>; Thu, 27 Feb 2020 09:22:41 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=references:user-agent:from:to:cc:subject:in-reply-to:message-id :date:mime-version; bh=RF8Ue2unzSumedVUndnrTeib9xeG+719wGQBNw2pCrM=; b=UNCn2USYP7vTh/wkAFV+ksJ9QnIML/BVP+5EkE/1YR1aCxZ5ObQ0sZwZBMKg9N8xgf 2WuoLvjuXSkYB0tk5ZeM1XCpyL350QyseV7S6Jv40GO9r4sVm901Gu+26YEtt02feUyb j1Q00unOiSwgRRDFjY4S8/xpORXmlp9zGtIvsQWLHRte+yULp09Yu50L0l/8Xi3HXU3Q 9kWZQwmhDphYzfm8KXe5Gj5LxBe0rsDJhfphD8LZ+2U2lkeh51NGm4VrbwFTSuQj6eqH iZljT1jfD4C8BnRr5LvhXSULaRZptRQtxOjmLE39qhrkYm4jhMgRoOYjQ7l3+prMKUqS gdSA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:references:user-agent:from:to:cc:subject :in-reply-to:message-id:date:mime-version; bh=RF8Ue2unzSumedVUndnrTeib9xeG+719wGQBNw2pCrM=; b=eNpsSTT8BTugvUv6odJrleZeEgs2NRc1pgKW2FkHruzN1usSO3J4IAtsqEZt+YEV9V BHbja0OGoNEt7NL2+G2uczMfi/DRUxTf9W8cKPzNnk38Vz7qmz3YrTn7s6ZIccM7ZClo 741N9jDDVbSUkrWDswMKdneJkUYUBP+ngFqFI7qjuVtTbTOTHJqJfH0nuXqkpe0YIJ6t wf5g+NzFzjKz6s7uI12G5zdlROuWCAGuUXUdEhu1Mqgn0w8S581hB+v0wjGI4gicZ3wr 9eU/3wUxbVRHtiUAaaGbnaqIjq3E/8uimBHFCZoMktoOtR2dPrpArc3l5Mi8uJcbt4HE dD3w== X-Gm-Message-State: APjAAAW2hm9+fPJ/TAzxxLt/9FoewJdD7yoViTaKyOIRAmx2cA/Bh/yc DxBFEuoCGndNjCSsiNTK3nwlQjgE X-Google-Smtp-Source: APXvYqzRO+rDXUMOIGm9JMWpl0cbbDoSp8UL05NIobSvjzXpqoP89fKxuBWUHvR8uoSEhzrCmMz0qA== X-Received: by 2002:a05:620a:698:: with SMTP id f24mr299869qkh.476.1582824155700; Thu, 27 Feb 2020 09:22:35 -0800 (PST) Original-Received: from arch (c-69-141-147-3.hsd1.nj.comcast.net. [69.141.147.3]) by smtp.gmail.com with ESMTPSA id 64sm3452075qkd.78.2020.02.27.09.22.34 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 27 Feb 2020 09:22:35 -0800 (PST) In-reply-to: <87pne0ajy3.fsf@gmail.com> 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: 209.51.188.43 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-mx.org@gnu.org Original-Sender: "bug-gnu-emacs" Xref: news.gmane.io gmane.emacs.bugs:176537 Archived-At: Noam Postavsky writes: > It doesn't fail if the buffer is changed to emacs-lisp-mode > before the > pp-buffer call. In the meantime, I'd like to be able to offer the users of my package a solution if they hit this bug. This seems to work for me, but I haven't written much, and am a bit leery of, elisp advice. Would you consider this an appropriate workaround?: (defun workaround/describe-variable-print-bug (original-function &rest args) "Put temp buffer in emacs-lisp before ORIGINAL-FUNCTION: `pp-buffer'. https://lists.gnu.org/archive/html/emacs-bug-tracker/2020-02/msg00376.html" (cl-flet ((pp-advice (original-function) (when (string-prefix-p " *temp" (buffer-name)) (let ((mm major-mode)) (emacs-lisp-mode) (funcall original-function) (funcall mm))))) (advice-add #'pp-buffer :around #'pp-advice) (unwind-protect (progn (apply original-function args) nil) (advice-remove #'pp-buffer #'pp-advice)))) (advice-add #'describe-variable :around #'workaround/describe-variable-print-bug)