From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.ciao.gmane.io!not-for-mail From: Drew Adams Newsgroups: gmane.emacs.devel Subject: =?utf-8?B?Rlc6IDMxMzk1NTExOiAiRG9u4oCZdCBhdHRlbXB0?= =?utf-8?B?IHRvIG1vZGlmeSBjb25zdGFudCBzdHJpbmdzIg==?= Date: Fri, 5 Jun 2020 18:34:50 -0700 (PDT) Message-ID: <19454d0f-cf93-4fac-8a11-3f4ba5c52886@default> References: <871rmvn7ge.fsf@gmail.com> <87lfl36abx.fsf@gmail.com> <1abe5965-b48e-6dee-1516-c5c233f09d01@cs.ucla.edu> <873679lel3.fsf@gmail.com> <87d06dje3d.fsf@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Injection-Info: ciao.gmane.io; posting-host="ciao.gmane.io:159.69.161.202"; logging-data="22893"; mail-complaints-to="usenet@ciao.gmane.io" Cc: Paul Eggert , =?utf-8?B?Sm/Do28gVMOhdm9yYQ==?= , Pip Cet , emacs-devel To: Dmitry Gutov Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Sat Jun 06 03:35:38 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 1jhNkI-0005qj-CN for ged-emacs-devel@m.gmane-mx.org; 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envelope-from=drew.adams@oracle.com; helo=userp2120.oracle.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/06/05 21:35:03 X-ACL-Warn: Detected OS = Linux 3.1-3.10 [fuzzy] X-Spam_score_int: -43 X-Spam_score: -4.4 X-Spam_bar: ---- X-Spam_report: (-4.4 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_MED=-2.3, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001 autolearn=_AUTOLEARN X-Spam_action: no action 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:251925 Archived-At: (Guess I forgot to use Reply All. Re-sending.) > > [bug#40671] is about modifying literal objects and this > > particular strangeness seems bigger than that. >=20 > Later it goes deeper than that. >=20 > > But that's a far cry from having two different manifestations > > of `equal` such objects _be_ the same object, but only for > > compiled code. > > That looks suboptimal to me too. I mean, it sounds like a sound > optimization (to an extent), but I really wonder if it really buys us > much in practice. And we're paying the price of not exactly obvious > behavior. Exactly the question - is it worth anything? Is it worth the cost of unclear and less useful behavior?