From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Dmitry Gutov Newsgroups: gmane.emacs.bugs Subject: bug#43557: 28.0.50; Please document which objects are mutable and which are not Date: Fri, 4 Jun 2021 16:26:02 +0300 Message-ID: References: <87mu0nv6y6.fsf@gnus.org> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="1767"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.8.1 Cc: Lars Ingebrigtsen , 43557@debbugs.gnu.org To: Stefan Monnier , Philipp Stephani Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Fri Jun 04 15:27:12 2021 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 1lp9qx-0000JV-Ja for geb-bug-gnu-emacs@m.gmane-mx.org; 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Fri, 04 Jun 2021 06:26:04 -0700 (PDT) In-Reply-To: Content-Language: en-US X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list 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:208014 Archived-At: Hi Stefan, On 03.06.2021 17:41, Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors wrote: > Mutability says whether it is*possible*, rather than whether it's > *allowed*. Most (all?) cons cells are mutable, but it is strongly > recommended to refrain from mutating most cons cells (because it > can/will have unexpected consequences because that same cons cell is > also used elsewhere). See bug#40671 (and the lengthy argument in there) to know how this term in the Emacs manual came to mean something else than it usually means.