Package: emacs;
Reported by: Vincent Lefevre <vincent <at> vinc17.net>
Date: Thu, 26 Jun 2025 08:47:02 UTC
Severity: normal
Tags: notabug
Found in version 30.1
Done: Eli Zaretskii <eliz <at> gnu.org>
Bug is archived. No further changes may be made.
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From: Vincent Lefevre <vincent <at> vinc17.net> To: 78904 <at> debbugs.gnu.org Subject: bug#78904: 30.1; in a long directory pathname, "Cannot write backup file" is output with a spurious blank line Date: Thu, 26 Jun 2025 10:45:42 +0200
1. mkdir a-very-very-very-very-very-very-long-directory-pathname 2. cd a-very-very-very-very-very-very-long-directory-pathname 3. touch foo 4. emacs -Q --eval '(defun find-backup-file-name (fn) (list "/"))' foo 5. Modify the buffer. 6. Save with C-x C-s The following is output: Cannot write backup file; backing up in ~/.emacs.d/%backup%~ but with a spurious blank line below, i.e. the echo area takes 2 lines instead of a single one. Note: it seems that what matters is the length of the absolute directory pathname. In my case, this is /home/vinc17/a-very-very-very-very-very-very-long-directory-pathname This occurs whether Emacs uses its own interface or runs in a terminal. In GNU Emacs 30.1 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.24.49, cairo version 1.18.4) of 2025-03-30, modified by Debian built on sbuild Windowing system distributor 'The X.Org Foundation', version 11.0.12101016 System Description: Debian GNU/Linux 13 (trixie) Configured using: 'configure --build x86_64-linux-gnu --prefix=/usr --sharedstatedir=/var/lib --libexecdir=/usr/libexec --localstatedir=/var/lib --infodir=/usr/share/info --mandir=/usr/share/man --with-libsystemd --with-pop=yes --enable-locallisppath=/etc/emacs:/usr/local/share/emacs/30.1/site-lisp:/usr/local/share/emacs/site-lisp:/usr/share/emacs/30.1/site-lisp:/usr/share/emacs/site-lisp --with-sound=alsa --without-gconf --with-mailutils --build x86_64-linux-gnu --prefix=/usr --sharedstatedir=/var/lib --libexecdir=/usr/libexec --localstatedir=/var/lib --infodir=/usr/share/info --mandir=/usr/share/man --with-libsystemd --with-pop=yes --enable-locallisppath=/etc/emacs:/usr/local/share/emacs/30.1/site-lisp:/usr/local/share/emacs/site-lisp:/usr/share/emacs/30.1/site-lisp:/usr/share/emacs/site-lisp --with-sound=alsa --without-gconf --with-mailutils --with-cairo --with-x=yes --with-x-toolkit=gtk3 --with-toolkit-scroll-bars 'CFLAGS=-g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/build/reproducible-path/emacs-30.1+1=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection -Wall' 'CPPFLAGS=-Wdate-time -D_FORTIFY_SOURCE=2' LDFLAGS=-Wl,-z,relro' Configured features: ACL CAIRO DBUS FREETYPE GIF GLIB GMP GNUTLS GPM GSETTINGS HARFBUZZ JPEG LCMS2 LIBOTF LIBSELINUX LIBSYSTEMD LIBXML2 M17N_FLT MODULES NATIVE_COMP NOTIFY INOTIFY PDUMPER PNG RSVG SECCOMP SOUND SQLITE3 THREADS TIFF TOOLKIT_SCROLL_BARS TREE_SITTER WEBP X11 XDBE XIM XINPUT2 XPM GTK3 ZLIB Important settings: value of $LC_COLLATE: POSIX value of $LC_CTYPE: C.UTF-8 value of $LC_TIME: en_DK.utf8 value of $LANG: C.UTF-8 locale-coding-system: utf-8-unix Major mode: Lisp Interaction Minor modes in effect: display-time-mode: t tooltip-mode: t global-eldoc-mode: t eldoc-mode: t show-paren-mode: t electric-indent-mode: t mouse-wheel-mode: t menu-bar-mode: t file-name-shadow-mode: t global-font-lock-mode: t font-lock-mode: t blink-cursor-mode: t minibuffer-regexp-mode: t column-number-mode: t line-number-mode: t transient-mark-mode: t auto-composition-mode: t auto-encryption-mode: t auto-compression-mode: t Load-path shadows: /usr/share/emacs/site-lisp/llvm-13/llvm-mode hides /usr/share/emacs/site-lisp/llvm-14/llvm-mode /usr/share/emacs/site-lisp/llvm-13/tablegen-mode hides /usr/share/emacs/site-lisp/llvm-14/tablegen-mode /usr/share/emacs/site-lisp/llvm-13/emacs hides /usr/share/emacs/site-lisp/llvm-14/emacs /usr/share/emacs/site-lisp/llvm-13/llvm-mode hides /usr/share/emacs/site-lisp/llvm-15/llvm-mode /usr/share/emacs/site-lisp/llvm-13/tablegen-mode hides /usr/share/emacs/site-lisp/llvm-15/tablegen-mode /usr/share/emacs/site-lisp/llvm-13/emacs hides /usr/share/emacs/site-lisp/llvm-15/emacs /usr/share/emacs/site-lisp/llvm-13/llvm-mode hides /usr/share/emacs/site-lisp/llvm-16/llvm-mode /usr/share/emacs/site-lisp/llvm-13/tablegen-mode hides /usr/share/emacs/site-lisp/llvm-16/tablegen-mode /usr/share/emacs/site-lisp/llvm-13/emacs hides /usr/share/emacs/site-lisp/llvm-16/emacs /usr/share/emacs/site-lisp/llvm-13/llvm-mode hides /usr/share/emacs/site-lisp/llvm-17/llvm-mode /usr/share/emacs/site-lisp/llvm-13/tablegen-mode hides /usr/share/emacs/site-lisp/llvm-17/tablegen-mode /usr/share/emacs/site-lisp/llvm-13/emacs hides /usr/share/emacs/site-lisp/llvm-17/emacs /usr/share/emacs/site-lisp/llvm-13/llvm-mode hides /usr/share/emacs/site-lisp/llvm-18/llvm-mode /usr/share/emacs/site-lisp/llvm-13/tablegen-mode hides /usr/share/emacs/site-lisp/llvm-18/tablegen-mode /usr/share/emacs/site-lisp/llvm-13/emacs hides /usr/share/emacs/site-lisp/llvm-18/emacs /usr/share/emacs/site-lisp/llvm-13/llvm-mode hides /usr/share/emacs/site-lisp/llvm-19/llvm-mode /usr/share/emacs/site-lisp/llvm-13/tablegen-mode hides /usr/share/emacs/site-lisp/llvm-19/tablegen-mode /usr/share/emacs/site-lisp/llvm-13/emacs hides /usr/share/emacs/site-lisp/llvm-19/emacs /usr/share/emacs/site-lisp/elpa/po-mode-0.23.1/po-mode-autoloads hides /usr/share/emacs/site-lisp/elpa-src/po-mode-0.23.1/po-mode-autoloads /usr/share/emacs/site-lisp/elpa/po-mode-0.23.1/po-mode hides /usr/share/emacs/site-lisp/elpa-src/po-mode-0.23.1/po-mode /usr/share/emacs/site-lisp/elpa/po-mode-0.23.1/po-mode-pkg hides /usr/share/emacs/site-lisp/elpa-src/po-mode-0.23.1/po-mode-pkg /usr/share/emacs/site-lisp/flim/sasl hides /usr/share/emacs/30.1/lisp/net/sasl /usr/share/emacs/site-lisp/latex-cjk-thai/thai-word hides /usr/share/emacs/30.1/lisp/language/thai-word Features: (shadow sort mail-extr cl-extra help-mode warnings compile comint ansi-osc ansi-color ring comp-run comp-common rx emacsbug message yank-media puny dired dired-loaddefs rfc822 mml mml-sec epa derived epg rfc6068 epg-config gnus-util text-property-search time-date mm-decode mm-bodies mm-encode mail-parse rfc2231 mailabbrev gmm-utils mailheader sendmail rfc2047 rfc2045 ietf-drums mm-util mail-prsvr mail-utils cus-start time cc-styles cc-align cc-engine cc-vars cc-defs w3m-load mmm-auto mmm-vars mmm-utils mmm-compat cus-edit pp cus-load wid-edit po-mode-autoloads package browse-url url url-proxy url-privacy url-expand url-methods url-history url-cookie generate-lisp-file url-domsuf url-util mailcap url-handlers url-parse auth-source cl-seq eieio eieio-core cl-macs icons password-cache json subr-x map byte-opt gv bytecomp byte-compile url-vars cl-loaddefs cl-lib rmc iso-transl tooltip cconv eldoc paren electric uniquify ediff-hook vc-hooks lisp-float-type elisp-mode mwheel term/x-win x-win term/common-win x-dnd touch-screen tool-bar dnd fontset image regexp-opt fringe tabulated-list replace newcomment text-mode lisp-mode prog-mode register page tab-bar menu-bar rfn-eshadow isearch easymenu timer select scroll-bar mouse jit-lock font-lock syntax font-core term/tty-colors frame minibuffer nadvice seq simple cl-generic indonesian philippine 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 emoji-zwj charscript charprop case-table epa-hook jka-cmpr-hook help abbrev obarray oclosure cl-preloaded button loaddefs theme-loaddefs faces cus-face macroexp files window text-properties overlay sha1 md5 base64 format env code-pages mule custom widget keymap hashtable-print-readable backquote threads dbusbind inotify lcms2 dynamic-setting system-font-setting font-render-setting cairo gtk x-toolkit xinput2 x multi-tty move-toolbar make-network-process native-compile emacs) Memory information: ((conses 16 153724 11952) (symbols 48 11962 0) (strings 32 37588 3766) (string-bytes 1 1225292) (vectors 16 19566) (vector-slots 8 481647 76139) (floats 8 52 6) (intervals 56 370 0) (buffers 992 12))
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