From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED.blaine.gmane.org!not-for-mail From: Stefan Monnier Newsgroups: gmane.emacs.devel Subject: Re: bug#38912: 27.0.60; PDumper meets segmentation fault when evil is loaded Date: Tue, 07 Jan 2020 09:16:31 -0500 Message-ID: References: Mime-Version: 1.0 Content-Type: text/plain Injection-Info: blaine.gmane.org; posting-host="blaine.gmane.org:195.159.176.226"; logging-data="118152"; mail-complaints-to="usenet@blaine.gmane.org" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.0.50 (gnu/linux) Cc: niwtrx@icloud.com, Paul Eggert , emacs-devel@gnu.org, 38912@debbugs.gnu.org, Pip Cet , Eli Zaretskii To: dancol@dancol.org Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Tue Jan 07 15:18:35 2020 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([209.51.188.17]) by blaine.gmane.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.89) (envelope-from ) id 1iopgp-000RWO-1M for ged-emacs-devel@m.gmane.org; Tue, 07 Jan 2020 15:18:35 +0100 Original-Received: from localhost ([::1]:49580 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iopgm-0004F0-Nt for ged-emacs-devel@m.gmane.org; Tue, 07 Jan 2020 09:18:32 -0500 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:33781) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iopew-0004po-K3 for emacs-devel@gnu.org; Tue, 07 Jan 2020 09:16:39 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1iopev-0006VE-3c for emacs-devel@gnu.org; Tue, 07 Jan 2020 09:16:38 -0500 Original-Received: from mailscanner.iro.umontreal.ca ([132.204.25.50]:25848) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1iopet-0006Tf-Hh; Tue, 07 Jan 2020 09:16:35 -0500 Original-Received: from pmg3.iro.umontreal.ca (localhost [127.0.0.1]) by pmg3.iro.umontreal.ca (Proxmox) with ESMTP id 778F244DB40; Tue, 7 Jan 2020 09:16:34 -0500 (EST) Original-Received: from mail01.iro.umontreal.ca (unknown [172.31.2.1]) by pmg3.iro.umontreal.ca (Proxmox) with ESMTP id 167FB44DB31; Tue, 7 Jan 2020 09:16:33 -0500 (EST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=iro.umontreal.ca; s=mail; t=1578406593; bh=zxUboq5LytD/4W/Ut4E6NtVStQB2KAac4+raK1g9y8A=; h=From:To:Cc:Subject:References:Date:In-Reply-To:From; b=e7jNooL8UlQ2XwIn9BPt4v1bACti7H8j1MIwJgMsl87jxgi8fTmNMt8SUf+TdQxXo qsXeAQJ7z0jAa6IjsKpZdHFVBtc0iWmokBnuhwXGnlHVxMjq3/C+xpcO+JbdbpyOhT wSbVCQfCgN0hi3mof+JDnkmfjJwjBZe7675c5nMGNFAfD0yHAQ53pIDqCLpvV8v7Nd lDmFeFmNA6+Ir0zFQwUB8UjXaj9yus3gkv7tNEYH8aVhN4qMq/ebLPNepA5JzLyWfN wcw7Nv07fBjukyJzWMS1QJM6HYQ7oANAHPFdSci8FNkDYvmIVO6zBPZjzZxJMg5Pgn qN6mA5PM3OaIg== Original-Received: from pastel (unknown [45.72.147.220]) by mail01.iro.umontreal.ca (Postfix) with ESMTPSA id B8E17120422; Tue, 7 Jan 2020 09:16:32 -0500 (EST) In-Reply-To: (dancol@dancol.org's message of "Mon, 06 Jan 2020 19:34:06 -0800") X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 132.204.25.50 X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Original-Sender: "Emacs-devel" Xref: news.gmane.org gmane.emacs.devel:244063 Archived-At: > The worst case is window configurations, where there's a nontrivial > function compare_window_configurations that Fequal delegates to. Indeed, this is very strange. > Does anyone know offhand why we don't simply use eq to compare window > configurations? I'm curious about it too. As a long-time Elisp coder, I find this behavior very odd (I just discovered it while looking at the code) and I think having them compared by identity would make a lot more sense. > I think changing the equal behavior of these objects would be > a compatibility change. Indeed. It's clearly out of the question for Emacs-27. But I'd be in favor of introducing this backward incompatibility in Emacs-28, unless we can find a good use case where the structural-equality is needed for them. Stefan