From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Mekeor Melire Newsgroups: gmane.emacs.bugs Subject: bug#71503: 30.0.50; pcase-lambda (with "and" and "guard") does not work as expected Date: Wed, 12 Jun 2024 08:40:54 +0000 Message-ID: <87r0d2lfjd.fsf@posteo.de> Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="36658"; mail-complaints-to="usenet@ciao.gmane.io" To: 71503@debbugs.gnu.org Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Wed Jun 12 10:42:23 2024 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 1sHJYl-0009Mc-3R for geb-bug-gnu-emacs@m.gmane-mx.org; Wed, 12 Jun 2024 10:42:23 +0200 Original-Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1sHJYV-00048z-4k; 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First, we call `pcase' on a value with a pattern involving `and' and `guard': (pcase "value" ((and v (guard (string= "not-value" v))) v)) ;; => nil Second, let's use the same value and pattern, but this time using `pcase-lambda': (funcall (pcase-lambda ((and v (guard (string= "not-value" v)))) v) "value") ;; => "value" Am I missing something or is this a bug? In GNU Emacs 30.0.50 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.24.41, cairo version 1.16.0).