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#47461: 27.2; Cannot delete windows due to some trouble with markers Date: Mon, 29 Mar 2021 12:00:22 +0300 Message-ID: <838s66mj15.fsf@gnu.org> Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="39919"; mail-complaints-to="usenet@ciao.gmane.io" To: 47461@debbugs.gnu.org Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Mon Mar 29 11:01:41 2021 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 1lQnmH-000AHn-AE for geb-bug-gnu-emacs@m.gmane-mx.org; Mon, 29 Mar 2021 11:01:41 +0200 Original-Received: from localhost ([::1]:42300 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lQnmG-0000Qu-BR for geb-bug-gnu-emacs@m.gmane-mx.org; Mon, 29 Mar 2021 05:01:40 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:44608) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lQnle-0000Pv-Gz for bug-gnu-emacs@gnu.org; Mon, 29 Mar 2021 05:01:02 -0400 Original-Received: from debbugs.gnu.org ([209.51.188.43]:36270) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1lQnle-0000Kt-8r for bug-gnu-emacs@gnu.org; Mon, 29 Mar 2021 05:01:02 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1lQnle-0006Pv-5r for bug-gnu-emacs@gnu.org; Mon, 29 Mar 2021 05:01:02 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Eli Zaretskii Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Mon, 29 Mar 2021 09:01:01 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: report 47461 X-GNU-PR-Package: emacs X-Debbugs-Original-To: bug-gnu-emacs@gnu.org Original-Received: via spool by submit@debbugs.gnu.org id=B.161700843724625 (code B ref -1); Mon, 29 Mar 2021 09:01:01 +0000 Original-Received: (at submit) by debbugs.gnu.org; 29 Mar 2021 09:00:37 +0000 Original-Received: from localhost ([127.0.0.1]:47816 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1lQnlF-0006P7-Ff for submit@debbugs.gnu.org; Mon, 29 Mar 2021 05:00:37 -0400 Original-Received: from lists.gnu.org ([209.51.188.17]:43534) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1lQnlE-0006P0-65 for submit@debbugs.gnu.org; Mon, 29 Mar 2021 05:00:36 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:44498) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lQnlA-00009i-Go for bug-gnu-emacs@gnu.org; Mon, 29 Mar 2021 05:00:35 -0400 Original-Received: from fencepost.gnu.org ([2001:470:142:3::e]:40151) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lQnl8-0008RX-IA for bug-gnu-emacs@gnu.org; Mon, 29 Mar 2021 05:00:32 -0400 Original-Received: from 84.94.185.95.cable.012.net.il ([84.94.185.95]:3244 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from ) id 1lQnkt-0005AR-5T for bug-gnu-emacs@gnu.org; Mon, 29 Mar 2021 05:00:25 -0400 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" Xref: news.gmane.io gmane.emacs.bugs:203225 Archived-At: I don't have a reproducer, since I don't know yet why would some marker in some buffer become invalid. However, given that this does happen for some reason, I am unable to delete windows via "C-x 1" and "C-x 0", due to this part of delete-window: (interactive) (when switch-to-buffer-preserve-window-point (window--before-delete-windows)) <<<<<<<<<<<<<<<<<<<<<< (Recall that switch-to-buffer-preserve-window-point is nowadays t by default.) What happens is that window--before-delete-windows works with markers, and if that signals an error, the whole command is aborted. All you get is this unhelpful error message: Marker does not point anywhere Fortunately, mouse-delete-window and mouse-delete-other-windows don't have the code shown above, so I was able to work around the problem by using those mouse commands. Another workaround is to temporarily reset switch-to-buffer-preserve-window-point, but that is only apparent if you read the code and realize or know that window--before-delete-windows is the one that signals the error. Should we perhaps run this with demoted errors in the interactive case, so that users aren't locked when something like that happens? (I will try to figure out which marker becomes invalid and why.) In GNU Emacs 27.2 (build 2, i686-pc-mingw32) of 2021-03-25 built on HOME-C4E4A596F7 Windowing system distributor 'Microsoft Corp.', version 5.1.2600 System Description: Microsoft Windows XP Service Pack 3 (v5.1.0.2600) Recent messages: For information about GNU Emacs and the GNU system, type C-h C-a. Configured using: 'configure -C --prefix=/d/usr --with-wide-int 'CFLAGS=-O2 -gdwarf-4 -g3'' Configured features: XPM JPEG TIFF GIF PNG RSVG SOUND NOTIFY W32NOTIFY ACL GNUTLS LIBXML2 HARFBUZZ ZLIB TOOLKIT_SCROLL_BARS MODULES THREADS JSON PDUMPER LCMS2 GMP Important settings: value of $LANG: ENU locale-coding-system: cp1255 Major mode: Lisp Interaction Minor modes in effect: tooltip-mode: t global-eldoc-mode: t eldoc-mode: t electric-indent-mode: t mouse-wheel-mode: t tool-bar-mode: t menu-bar-mode: t file-name-shadow-mode: t global-font-lock-mode: t font-lock-mode: t blink-cursor-mode: t auto-composition-mode: t auto-encryption-mode: t auto-compression-mode: t line-number-mode: t transient-mark-mode: t Load-path shadows: None found. Features: (shadow sort mail-extr emacsbug message rmc puny dired dired-loaddefs format-spec rfc822 mml easymenu mml-sec password-cache epa derived epg epg-config gnus-util rmail rmail-loaddefs text-property-search time-date subr-x seq byte-opt gv bytecomp byte-compile cconv mm-decode mm-bodies mm-encode mail-parse rfc2231 mailabbrev gmm-utils mailheader cl-loaddefs cl-lib sendmail rfc2047 rfc2045 ietf-drums mm-util mail-prsvr mail-utils tooltip eldoc electric uniquify ediff-hook vc-hooks lisp-float-type mwheel dos-w32 ls-lisp disp-table term/w32-win w32-win w32-vars term/common-win tool-bar dnd fontset image regexp-opt fringe tabulated-list replace newcomment text-mode elisp-mode lisp-mode prog-mode register page tab-bar menu-bar rfn-eshadow isearch timer select scroll-bar mouse jit-lock font-lock syntax facemenu font-core term/tty-colors frame minibuffer cl-generic cham georgian utf-8-lang misc-lang vietnamese tibetan thai tai-viet lao korean japanese eucjp-ms cp51932 hebrew greek romanian slovak czech european ethiopic indian cyrillic chinese composite charscript charprop case-table epa-hook jka-cmpr-hook help simple abbrev obarray cl-preloaded nadvice loaddefs button faces cus-face macroexp files text-properties overlay sha1 md5 base64 format env code-pages mule custom widget hashtable-print-readable backquote threads w32notify w32 lcms2 multi-tty make-network-process emacs) Memory information: ((conses 16 50567 10691) (symbols 48 7168 1) (strings 16 18854 2188) (string-bytes 1 533195) (vectors 16 9556) (vector-slots 8 128347 7168) (floats 8 21 169) (intervals 40 255 69) (buffers 888 11))