From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.bugs Subject: bug#65051: internal_equal manipulates symbols with position without checking symbols-with-pos-enabled. Date: Sat, 05 Aug 2023 15:13:22 +0300 Message-ID: <83leepsn4t.fsf@gnu.org> References: <83leeqvpx8.fsf@gnu.org> <83h6pevnd0.fsf@gnu.org> <838raqvg91.fsf@gnu.org> <83r0ohsqmp.fsf@gnu.org> Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="32085"; mail-complaints-to="usenet@ciao.gmane.io" Cc: 65051@debbugs.gnu.org, acm@muc.de, monnier@iro.umontreal.ca To: Alan Mackenzie Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Sat Aug 05 14:14:18 2023 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 1qSGAi-00086a-65 for geb-bug-gnu-emacs@m.gmane-mx.org; Sat, 05 Aug 2023 14:14:16 +0200 Original-Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1qSGAX-0000YI-1T; Sat, 05 Aug 2023 08:14:05 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qSGAU-0000WU-Gc for bug-gnu-emacs@gnu.org; Sat, 05 Aug 2023 08:14:02 -0400 Original-Received: from debbugs.gnu.org ([2001:470:142:5::43]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1qSGAU-0006W9-6O for bug-gnu-emacs@gnu.org; Sat, 05 Aug 2023 08:14:02 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1qSGAT-0001gQ-MJ for bug-gnu-emacs@gnu.org; Sat, 05 Aug 2023 08:14:01 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Eli Zaretskii Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Sat, 05 Aug 2023 12:14:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 65051 X-GNU-PR-Package: emacs Original-Received: via spool by 65051-submit@debbugs.gnu.org id=B65051.16912375976355 (code B ref 65051); Sat, 05 Aug 2023 12:14:01 +0000 Original-Received: (at 65051) by debbugs.gnu.org; 5 Aug 2023 12:13:17 +0000 Original-Received: from localhost ([127.0.0.1]:56020 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1qSG9k-0001eR-M3 for submit@debbugs.gnu.org; Sat, 05 Aug 2023 08:13:17 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:34834) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1qSG9i-0001eD-7j for 65051@debbugs.gnu.org; Sat, 05 Aug 2023 08:13:16 -0400 Original-Received: from fencepost.gnu.org ([2001:470:142:3::e]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qSG9c-0006F8-Fa; Sat, 05 Aug 2023 08:13:08 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnu.org; s=fencepost-gnu-org; h=References:Subject:In-Reply-To:To:From:Date: mime-version; bh=JEahpuQpJp8eFQxsYVxmYtWKCgPgKh/nokHPaNeH2Jc=; b=J7ZCOAChULhQ yDq38Mg5f5a0C4YHGUXzqlJn41WpPUTdtPKYQf9sTc1otwMdDcyobK1wlXkl3ug6CIgZJ/GE5rgTI dPD4wv6t93UR6VF9W5UnbaMKJn/sH0FHOiKDRaZ44ya938PNis3aY6rdz7C+YkVQZ/XJ/p1lFP97r XXVR8qw9xbyjSXgbG3jEGvSApM2KisTeALsluVZ2+30oJtJEIA+ZlxoYREqOhRqj3vsZn/q7imX3r caG/vUlgENeZs1VtJHbss+ZygkChzdxRAXqFl1bYCXXGgcXVI3La3yLWu1oaLVzAqh/evh3voMvHx O2OAqmWcutCJj80XEEogMg==; Original-Received: from [87.69.77.57] (helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qSG9b-0000Gs-KA; Sat, 05 Aug 2023 08:13:08 -0400 In-Reply-To: (message from Alan Mackenzie on Sat, 5 Aug 2023 11:52:52 +0000) 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-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Xref: news.gmane.io gmane.emacs.bugs:266773 Archived-At: > Date: Sat, 5 Aug 2023 11:52:52 +0000 > Cc: 65051@debbugs.gnu.org, Stefan Monnier , > acm@muc.de > From: Alan Mackenzie > > Hello, Eli. > > On Sat, Aug 05, 2023 at 13:57:50 +0300, Eli Zaretskii wrote: > > > Date: Sat, 5 Aug 2023 10:45:37 +0000 > > > Cc: 65051@debbugs.gnu.org, acm@muc.de > > > From: Alan Mackenzie > > [ .... ] > > > > > So we can have two different copies of #, such that > > > > their hex values are different? Isn't that a bug? why don't we > > > > conflate such identical symbols? > > > > No, it's not a bug, anymore than having two `equal' copies of '(a b c) > > > would be a bug. > > > But with symbols we store them in obarray, and obarray ought to find > > the existing slot for # and reuse it, rather than > > create a new slot? > > No, only the bare symbol is in the obarray. The symbol with position > itself is a pseudovector, with contents (i) a bare symbol (a Lisp_Object > "pointing at" the obarray) and (ii) the unsigned integer position. Please document this factoid in the ELisp manual, I think it's very important, and having it undocumented is a Bad Thing.