The function calculates frame width one column too small in regard to displayed buffer which results in text being wrapped around and extra line added to the frame. If you look at attached png image you will see backward slash and extra line added below. Or you can run the attached .el file. Simple fix I used was to add an extra column to the width of the frame after I called fit-frame-to-buffer (commented away in the attached file). The frame created is without any decorations, fringes, borders etc. I wanted as "bare" X11 window as possible, so the misscalculation might be due to some missing border or something, I haven't investigated myself. This probably affects earlier Emacs versions too. I haven't tested other targets, non-gtk or on other OS. To reproduce save attached emacs-vision-clock.el somewhere and eval with Emacs -Q. Example: emacs -Q -l ./emacs-vision-clock.el --eval "(emacs-vision-clock-run)"& In GNU Emacs 29.0.50 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.24.30, cairo version 1.17.4) of 2021-11-17 built on pascal Repository revision: 1ddebefc9fe178e9e8b4275a45e0eda1bcf7848e Repository branch: alpha-patch Windowing system distributor 'The X.Org Foundation', version 11.0.12101001 System Description: Arch Linux Configured using: 'configure --with-native-compilation 'CFLAGS=-O2 -march=native -mtune=native'' Configured features: ACL CAIRO DBUS FREETYPE GIF GLIB GMP GNUTLS GPM GSETTINGS HARFBUZZ JPEG JSON LCMS2 LIBOTF LIBSYSTEMD LIBXML2 M17N_FLT MODULES NATIVE_COMP NOTIFY INOTIFY PDUMPER PNG RSVG SECCOMP SOUND THREADS TIFF TOOLKIT_SCROLL_BARS WEBP X11 XDBE XIM XPM GTK3 ZLIB Important settings: value of $LANG: sv_SE.UTF-8 locale-coding-system: utf-8-unix Major mode: Lisp Interaction Minor modes in effect: tooltip-mode: t global-eldoc-mode: t eldoc-mode: t show-paren-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 indent-tabs-mode: t transient-mark-mode: t Load-path shadows: None found. Features: (shadow sort mail-extr emacsbug message mailcap yank-media rmc puny dired dired-loaddefs rfc822 mml mml-sec epa derived epg rfc6068 epg-config gnus-util rmail rmail-loaddefs auth-source cl-seq eieio eieio-core cl-macs eieio-loaddefs password-cache json map text-property-search time-date seq gv subr-x byte-opt bytecomp byte-compile cconv mm-decode mm-bodies mm-encode mail-parse rfc2231 mailabbrev gmm-utils mailheader sendmail rfc2047 rfc2045 ietf-drums mm-util mail-prsvr mail-utils emacs-vision-clock time-stamp help-mode cl-loaddefs cl-lib iso-transl tooltip eldoc paren electric uniquify ediff-hook vc-hooks lisp-float-type elisp-mode mwheel term/x-win x-win term/common-win x-dnd 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 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 emoji-zwj charscript charprop case-table epa-hook jka-cmpr-hook help simple abbrev obarray cl-preloaded nadvice button loaddefs faces cus-face macroexp files window text-properties overlay sha1 md5 base64 format env code-pages mule custom widget hashtable-print-readable backquote threads dbusbind inotify lcms2 dynamic-setting system-font-setting font-render-setting cairo move-toolbar gtk x-toolkit x multi-tty make-network-process native-compile emacs) Memory information: ((conses 16 71626 11134) (symbols 48 6834 0) (strings 32 20798 1615) (string-bytes 1 700953) (vectors 16 14697) (vector-slots 8 313076 18657) (floats 8 27 32) (intervals 56 216 0) (buffers 992 11))
fit-frame-to-buffer-bug.png
Description: PNG image
emacs-vision-clock.el
Description: Text document
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