From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Stefan Monnier via "Bug reports for GNU Emacs, the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org> Newsgroups: gmane.emacs.bugs Subject: bug#45619: 28.0.50; pcase-let on MacOS doesn't work Date: Sat, 12 Feb 2022 09:56:37 -0500 Message-ID: <jwvr188ywem.fsf-monnier+emacs@gnu.org> References: <tencent_420EB82A750AC42DCD81ECB23589C171FE07@qq.com> <877dos50su.fsf@web.de> <87k0e04jet.fsf@gnus.org> Reply-To: Stefan Monnier <monnier@iro.umontreal.ca> Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="37844"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/29.0.50 (gnu/linux) Cc: Michael Heerdegen <michael_heerdegen@web.de>, jixiuf <jixiuf@qq.com>, 45619@debbugs.gnu.org To: Lars Ingebrigtsen <larsi@gnus.org> Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Sat Feb 12 15:57:11 2022 Return-path: <bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org> 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 <bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org>) id 1nItpm-0009ds-3B for geb-bug-gnu-emacs@m.gmane-mx.org; 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Sat, 12 Feb 2022 09:56:38 -0500 (EST) In-Reply-To: <87k0e04jet.fsf@gnus.org> (Lars Ingebrigtsen's message of "Sat, 12 Feb 2022 08:46:02 +0100") 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" <bug-gnu-emacs.gnu.org> List-Unsubscribe: <https://lists.gnu.org/mailman/options/bug-gnu-emacs>, <mailto:bug-gnu-emacs-request@gnu.org?subject=unsubscribe> List-Archive: <https://lists.gnu.org/archive/html/bug-gnu-emacs> List-Post: <mailto:bug-gnu-emacs@gnu.org> List-Help: <mailto:bug-gnu-emacs-request@gnu.org?subject=help> List-Subscribe: <https://lists.gnu.org/mailman/listinfo/bug-gnu-emacs>, <mailto:bug-gnu-emacs-request@gnu.org?subject=subscribe> Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Original-Sender: "bug-gnu-emacs" <bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org> Xref: news.gmane.io gmane.emacs.bugs:226728 Archived-At: <http://permalink.gmane.org/gmane.emacs.bugs/226728> Lars Ingebrigtsen [2022-02-12 08:46:02] wrote: > Michael Heerdegen <michael_heerdegen@web.de> writes: >>> (pcase-let ((`(,default-directory) '( "/tmp/"))) >>> (call-interactively 'find-file)) >>> >>> Expected behavior: Find file in "/tmp/" >>> Observed behavior: Find file in "~" >> >> AFAICT the issue here is that `pcase-let' always creates lexically >> scoped bindings, even for special variables. That can be surprising. >> >> @Stefan, what can we do? Document better? Add compiler warnings? Or >> is it possible to "fix" this? > I tried the form in Emacs 29, and I got the expected behaviour here. So > was this fixed since this bug was reported? (But I only tested on Debian.) Hmm... I doubt it's fixed in all cases. I still think pcase should emit a warning when asked to bind a dynamically scoped variable. Stefan