1. Make sure you have a Git repository with binary files containing say the "copyright" word; One can clone https://github.com/orontee/lesmotsdugene/ for example. 2. Start Emacs using a locale different from "C" or other English based locales, for example "fr_FR.UTF8": LANG=fr_FR.UTF8 emacs -Q 3. Then call `project-find-regexp' in the the Git repository identified in step 1, and search for the word "copyright"; There's no results but the following error message: xref-matches-in-files: Search failed with status 0: grep: content/images/planche_1.png : fichiers binaires correspondent If Emacs is started with "C" locale, then there are results! The problem comes from `xref-matches-in-files', precisely this block where `grep' output has been hardcoded even if depending on the locale: (when (and (/= (point-min) (point-max)) (not (looking-at grep-re)) ;; TODO: Show these matches as well somehow? ;; Matching both Grep's and Ripgrep 13's messages. (not (looking-at ".*[bB]inary file.* matches"))) (user-error "Search failed with status %d: %s" status (buffer-substring (point-min) (line-end-position)))) As quick fix one cas use: (map-do (lambda (key val) (map-put xref-search-program-alist key (concat "LANG=C " val))) xref-search-program-alist) In GNU Emacs 30.0.93 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.24.38, cairo version 1.16.0) of 2025-01-01 built on peitho Repository revision: 7acfea19358da3a02e5884f5e7d56c87d7b16616 Repository branch: emacs-30 System Description: Debian GNU/Linux 12 (bookworm) Configured using: 'configure --with-pgtk CFLAGS=-O3' Configured features: ACL CAIRO DBUS FREETYPE GIF GLIB GMP GNUTLS GPM GSETTINGS HARFBUZZ JPEG LCMS2 LIBOTF LIBSELINUX LIBSYSTEMD LIBXML2 MODULES NATIVE_COMP NOTIFY INOTIFY PDUMPER PGTK PNG RSVG SECCOMP SOUND SQLITE3 THREADS TIFF TOOLKIT_SCROLL_BARS TREE_SITTER WEBP XIM GTK3 ZLIB Important settings: value of $LANG: fr_FR.UTF-8 value of $XMODIFIERS: @im=ibus locale-coding-system: utf-8-unix Major mode: Markdown Minor modes in effect: highlight-changes-visible-mode: t goto-address-mode: t pulsar-global-mode: t pulsar-mode: t breadcrumb-mode: t breadcrumb-local-mode: t outline-minor-mode: t guess-language-mode: t flyspell-mode: t desktop-save-mode: t spacious-padding-mode: t savehist-mode: t server-mode: t pixel-scroll-precision-mode: t save-place-mode: t electric-pair-mode: t global-corfu-mode: t corfu-mode: t marginalia-mode: t vertico-mode: t global-display-fill-column-indicator-mode: t global-so-long-mode: t global-auto-revert-mode: t auto-insert-mode: t remember-notes-mode: t which-key-mode: t tooltip-mode: t global-eldoc-mode: t eldoc-mode: t show-paren-mode: t electric-layout-mode: t electric-indent-mode: t mouse-wheel-mode: t tab-bar-mode: t file-name-shadow-mode: t context-menu-mode: t global-font-lock-mode: t font-lock-mode: t blink-cursor-mode: t window-divider-mode: t minibuffer-regexp-mode: t line-number-mode: t indent-tabs-mode: t transient-mark-mode: t auto-composition-mode: t auto-encryption-mode: t auto-compression-mode: t Load-path shadows: /home/matthias/.config/emacs/elpa/which-key-20240620.2145/which-key hides /usr/local/share/emacs/30.0.93/lisp/which-key /home/matthias/.config/emacs/elpa/modus-themes-20241228.1050/theme-loaddefs hides /usr/local/share/emacs/30.0.93/lisp/theme-loaddefs Features: (shadow sort mail-extr emacsbug mm-archive network-stream url-cache debbugs-gnu add-log debbugs soap-client url-http url-auth url-gw nsm debbugs-compat tabify cus-start pcmpl-unix pcmpl-gnu edebug etags fileloop bug-reference quail misearch multi-isearch cl-print tramp-cache time-stamp shortdoc rng-xsd xsd-regexp rng-cmpct rng-nxml rng-valid rng-loc rng-uri rng-parse nxml-parse rng-match rng-dt rng-util rng-pttrn nxml-ns nxml-mode nxml-outln nxml-rap nxml-util nxml-enc xmltok generic dired-aux mhtml-mode css-mode js sgml-mode facemenu find-dired ffap help-fns radix-tree vc-hg vc-bzr vc-src vc-sccs vc-svn vc-cvs vc-rcs log-view pcvs-util mule-util vc-dir vc hl-line display-line-numbers hilit-chg goto-addr oc-basic org-element org-persist org-id org-refile org-element-ast inline avl-tree generator ol-eww eww url-queue mm-url ol-rmail ol-mhe ol-irc ol-info ol-gnus nnselect gnus-art mm-uu mml2015 mm-view mml-smime smime gnutls dig gnus-sum shr pixel-fill kinsoku url-file svg dom gnus-group gnus-undo gnus-start gnus-dbus dbus xml gnus-cloud nnimap nnmail mail-source utf7 nnoo gnus-spec gnus-int gnus-range message sendmail yank-media puny rfc822 mml mml-sec epa epg rfc6068 epg-config mm-decode mm-bodies mm-encode mail-parse rfc2231 rfc2047 rfc2045 ietf-drums mailabbrev gmm-utils mailheader gnus-win gnus nnheader gnus-util mail-utils range mm-util mail-prsvr ol-docview doc-view jka-compr image-mode exif ol-bibtex bibtex ol-bbdb ol-w3m ol-doi org-link-doi org ob ob-tangle ob-ref ob-lob ob-table ob-exp org-macro org-src sh-script smie executable ob-comint org-pcomplete org-list org-footnote org-faces org-entities ob-emacs-lisp ob-core ob-eval org-cycle org-table ol org-fold org-fold-core org-keys oc org-loaddefs cal-menu calendar cal-loaddefs org-version org-compat org-macs pulsar eglot external-completion jsonrpc xref flymake ert ewoc debug backtrace breadcrumb pulse imenu peitho-custom cus-edit cus-load wid-edit dired-x dired dired-loaddefs grep reftex reftex-loaddefs reftex-vars tex-mode compile markdown-mode edit-indirect color sql view thingatpt scheme info-look python project pcase c++-ts-mode c-ts-mode c-ts-common treesit skeleton find-file gdb-mi bindat gud noutline outline ediff ediff-merg ediff-mult ediff-wind ediff-diff ediff-help ediff-init ediff-util smerge-mode diff vc-git diff-mode track-changes vc-dispatcher glasses whitespace guess-language flyspell find-func ispell comp comp-cstr cl-extra warnings comp-run comp-common desktop frameset spacious-padding modus-vivendi-tritanopia-theme modus-vivendi-deuteranopia-theme modus-vivendi-tinted-theme modus-vivendi-theme modus-operandi-tritanopia-theme modus-operandi-deuteranopia-theme modus-operandi-tinted-theme modus-operandi-theme modus-themes savehist server bookmark text-property-search pp pixel-scroll cua-base time tar-mode arc-mode archive-mode saveplace tramp-sh tramp trampver tramp-integration files-x tramp-message help-mode tramp-compat xdg shell pcomplete comint ansi-osc ring parse-time iso8601 time-date format-spec ansi-color tramp-loaddefs elec-pair corfu marginalia vertico compat easy-mmode display-fill-column-indicator so-long autorevert filenotify autoinsert cc-mode cc-fonts cc-guess cc-menus cc-cmds cc-styles cc-align cc-engine cc-vars cc-defs generic-x derived remember diminish which-key face-remap CMake-doc-autoloads Python-doc-autoloads breadcrumb-autoloads cmake-mode-autoloads consult-autoloads corfu-autoloads debbugs-autoloads devhelp-autoloads diminish-autoloads edit-indirect-autoloads git-link-autoloads gnu-elpa-keyring-update-autoloads guess-language-autoloads marginalia-autoloads markdown-mode-autoloads meson-mode-autoloads modus-themes-autoloads nginx-mode-autoloads powershell-autoloads pulsar-autoloads restclient-autoloads rfc-mode-autoloads info spacious-padding-autoloads speechd-el-autoloads systemd-autoloads rx tldr-autoloads vertico-autoloads which-key-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/pgtk-win pgtk-win term/common-win touch-screen pgtk-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 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 dynamic-setting system-font-setting font-render-setting cairo gtk pgtk lcms2 multi-tty move-toolbar make-network-process native-compile emacs) Memory information: ((conses 16 1437487 391817) (symbols 48 45565 30) (strings 32 242916 64728) (string-bytes 1 8371886) (vectors 16 86880) (vector-slots 8 1873292 92379) (floats 8 5893 1984) (intervals 56 42369 288) (buffers 992 95)) -- Matthias