From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED.blaine.gmane.org!not-for-mail From: Trevor Murphy via "Bug reports for GNU Emacs, the Swiss army knife of text editors" Newsgroups: gmane.emacs.bugs Subject: bug#38677: 26.3; `display-buffer-reuse-mode-window' doesn't check for derived modes Date: Thu, 19 Dec 2019 12:37:40 -0800 Message-ID: Reply-To: Trevor Murphy Mime-Version: 1.0 Content-Type: text/plain Injection-Info: blaine.gmane.org; posting-host="blaine.gmane.org:195.159.176.226"; logging-data="29741"; mail-complaints-to="usenet@blaine.gmane.org" User-Agent: mu4e 1.2.0; emacs 26.3 To: 38677@debbugs.gnu.org Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Thu Dec 19 21:43:30 2019 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([209.51.188.17]) by blaine.gmane.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.89) (envelope-from ) id 1ii2du-0007dN-15 for geb-bug-gnu-emacs@m.gmane.org; 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X-Mailman-Approved-At: Thu, 19 Dec 2019 15:41:02 -0500 X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.51.188.43 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.org@gnu.org Original-Sender: "bug-gnu-emacs" Xref: news.gmane.org gmane.emacs.bugs:173556 Archived-At: The problem is in the middle of the function: (let ((mode? (with-current-buffer (window-buffer window) (cond ((memq major-mode allowed-modes) 'same) ((derived-mode-p allowed-modes) ; <= this line 'derived))))) ...) `allowed-modes' is always a list at this point, but `derived-mode-p' expects each mode as a separated argument (it takes them with an &rest parameter). So this call always fails.