From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.ciao.gmane.io!not-for-mail From: Michael Heerdegen Newsgroups: gmane.emacs.devel Subject: Re: emacs-27 eebfb72 1/2: Document constant vs mutable objects better Date: Mon, 20 Apr 2020 02:18:01 +0200 Message-ID: <87wo6bau2u.fsf@web.de> References: <20200418200112.26900.1274@vcs0.savannah.gnu.org> <20200418200114.85C8C20A2B@vcs0.savannah.gnu.org> <87wo6c5vxf.fsf@gmail.com> <54e69de3-f1b9-cbcc-dec1-11f5b1bcd481@cs.ucla.edu> <87o8rn3y2k.fsf@gmail.com> Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="ciao.gmane.io:159.69.161.202"; logging-data="80115"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux) Cc: =?utf-8?B?xaB0xJtww6FuIE7Em21lYw==?= , emacs-devel@gnu.org To: Paul Eggert Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Mon Apr 20 02:23:52 2020 Return-path: Envelope-to: ged-emacs-devel@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 1jQKE4-000Kl6-TV for ged-emacs-devel@m.gmane-mx.org; Mon, 20 Apr 2020 02:23:52 +0200 Original-Received: from localhost ([::1]:55518 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jQKE3-0001tI-JM for ged-emacs-devel@m.gmane-mx.org; Sun, 19 Apr 2020 20:23:51 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:48874 helo=eggs1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jQK8Z-0000jK-OV for emacs-devel@gnu.org; Sun, 19 Apr 2020 20:18:11 -0400 Original-Received: from Debian-exim by eggs1p.gnu.org with spam-scanned (Exim 4.90_1) (envelope-from ) id 1jQK8Y-0004ny-Vs for emacs-devel@gnu.org; Sun, 19 Apr 2020 20:18:11 -0400 Original-Received: from mout.web.de ([212.227.17.12]:59911) by eggs1p.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1jQK8Y-0004my-EB for emacs-devel@gnu.org; Sun, 19 Apr 2020 20:18:10 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=web.de; s=dbaedf251592; t=1587341879; bh=Fw2RBN7uEsyPxZ04/s+1xjZsWN7ueBjFxGYtOASHF3k=; h=X-UI-Sender-Class:From:To:Cc:Subject:References:Date:In-Reply-To; b=lu+0kcYcflUgMK+rLrAH4MNJ8M5L98AOX8EwYgbpQqStLhsiaz/tHjawilf+Deya2 55gkXHjx+fHgd/6Yc9km27gkfsZh7jdfn+isE1t6dkcxom2fbMvfntEf0lXyUsohFf BHbzSbofRmp2p7G0DX6GxcJoBAArs914QHl1pLCE= X-UI-Sender-Class: c548c8c5-30a9-4db5-a2e7-cb6cb037b8f9 Original-Received: from drachen.dragon ([188.98.99.7]) by smtp.web.de (mrweb103 [213.165.67.124]) with ESMTPSA (Nemesis) id 0LuLt5-1jH0qG2sfn-011gN2; Mon, 20 Apr 2020 02:17:59 +0200 In-Reply-To: (Paul Eggert's message of "Sun, 19 Apr 2020 16:48:46 -0700") X-Provags-ID: V03:K1:sjy8FkQWxaGkDiHe4+Qv7ccYR83FMmWS3FQEK0bjKAKdV5XCQ7s bRxVubNdhdJB9bBEJRthyqh1sRdy/fX9XOioZQA81s6vFJF0ZdBj/5C3HIPAN5upDiaBnhR 3SmysEP1YBD8x0/69z0knvljKH2WbmoW4QKd76SLM60BirGx1I5Cdoq0Rky4JeH+KhOUTJo VXIjrzbVNAzy4B/gsK54A== X-UI-Out-Filterresults: notjunk:1;V03:K0:u1PmEqyX4Ho=:OMCqXv5/xthz+68nR7Y9Fz 11NfOWkmMtVt2FFYI4aoakL64oNT5y+9urr6aEi+0XZv0KV09Jd/bIy1SG9w73LYTaiSHU8Pp x9VrcqK3mKSOcva//6XQLJL/0UamGOAsrPE4f/djRgJqw7fS7akMKiPbiXzW7lyM/TCLt93HA 97g+Uxk3CBg74UDa5aD4hce1oP9tvU6dtP+vO2hnUMJPV4h27/AkpGsuSVpJ4bohqnVIzaklG wKpIJpGGEbAXMgVD19OQ4E6z+zJGZXW3p5EJ3Wnmp018SJcsl845s8NaFz52414cezRRD3MXL Dds2L1aGF3n5nZ2y1SyB9+JNmooB2HXBrR9W4HphLuTY0qSy3kJ/y3rAMFYWiZQbvtNoU5Al4 3Xy2E0lh4IisCqOoV5Ey6meNefO08+XrDTk3jVSa3Uf5Knf+cf1hRxfRHaHWkYq1Hp04729bh W744W7lvm0Y3+z46TaS+6rAbX9tkqU6DSgGIV6lL6rl/JyzD5wUt0upTBg9Hn/q9GKtC1ETPu Do4yCfIaEJoWKGsntj/kxJesyldPMH/Ba+iDcrVJIqiO3xVmPG9W0Hhd3slUxVx10f6Day8Hw 0UNa9EtmxBjxsgSgsMUfwnCVqZ3iXU9fHfQkMQq8HuNaVU/W2B/tqM2C4/qKk3CbR2LkPDD41 B2y0w05sqKB01vW7GPGBmBYtY3xeSy8Ombo06ftbbqrObRcXe4bxISD2ztZy2ZI/tT6FVlDAC 8cJUxAL6nzdc6XxFBr3X8VRtjVvbcZC4g2cYlgt58zxhyCp0bJ4GfI2KSZXaR0KWBDFl29Ka Received-SPF: pass client-ip=212.227.17.12; envelope-from=michael_heerdegen@web.de; helo=mout.web.de X-detected-operating-system: by eggs1p.gnu.org: Linux 2.2.x-3.x [generic] X-Received-From: 212.227.17.12 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-mx.org@gnu.org Original-Sender: "Emacs-devel" Xref: news.gmane.io gmane.emacs.devel:247347 Archived-At: Paul Eggert writes: > No, there are exceptions. For example the following makes my Emacs > dump core, even though all it does is modify a string. > > (aset (symbol-name 'cons) 0 ?x) > > It's trying to change the spelling of the name of the 'cons' function, > but that spelling is in memory that the operating system protects on > my platform. What you didn't say (directly) is that this means your Emacs will crash if you eval this. It would have been...good. Michael.