Hi, In wdired-mode, it looks like I only replace the first match. Steps to reproduce : 1. Open a folder in wdired-mode 2. M-x replace-string This should only replace the first occurences and fails for other with the backtrace below: Debugger entered--Lisp error: (error "Match data clobbered by buffer modification hooks") replace-match-maybe-edit("LOL" nil t nil (1992 1994 #>) nil) perform-replace("py" "LOL" nil nil nil nil nil nil nil nil nil) replace-string("py" "LOL" nil nil nil nil nil) funcall-interactively(replace-string "py" "LOL" nil nil nil nil nil) command-execute(replace-string record) execute-extended-command(nil "replace-string" nil) funcall-interactively(execute-extended-command nil "replace-string" nil) command-execute(execute-extended-command) My setup is below. Thanks ! 8<------------------------------------------------------------------------------- In GNU Emacs 28.0.50 (build 1, x86_64-unknown-freebsd13.0, GTK+ Version 3.24.27, cairo version 1.16.0) of 2021-04-20 built on ecchi Repository revision: b5c76530fab4b99e76249bfb9a105b30bef4ce67 Repository branch: feature/native-comp Windowing system distributor 'The X.Org Foundation', version 11.0.12011000 System Description: 13.0-RELEASE Configured using: 'configure --with-native-compilation' Configured features: ACL CAIRO DBUS FREETYPE GIF GLIB GMP GNUTLS GSETTINGS HARFBUZZ JPEG JSON LCMS2 LIBOTF LIBXML2 M17N_FLT MODULES NATIVE_COMP NOTIFY KQUEUE PDUMPER PNG RSVG SOUND THREADS TIFF TOOLKIT_SCROLL_BARS X11 XDBE XIM XPM GTK3 ZLIB Important settings: value of $LANG: en_US.UTF-8 value of $XMODIFIERS: @im=ibus locale-coding-system: utf-8-unix Major mode: Debugger Minor modes in effect: tooltip-mode: t global-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 buffer-read-only: t line-number-mode: t transient-mark-mode: (only . t) Load-path shadows: None found. Features: (shadow sort mail-extr emacsbug message rmc puny rfc822 mml mml-sec epa derived epg epg-config gnus-util rmail rmail-loaddefs auth-source eieio eieio-core eieio-loaddefs password-cache json map 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 cl-print debug backtrace find-func cus-edit pp wid-edit cus-start cus-load help-fns radix-tree thingatpt wdired dired-aux comp comp-cstr warnings subr-x rx cl-seq cl-macs cl-extra help-mode seq byte-opt gv bytecomp byte-compile cconv cl-loaddefs cl-lib dired dired-loaddefs iso-transl tooltip eldoc electric uniquify ediff-hook vc-hooks lisp-float-type 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 elisp-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 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 kqueue lcms2 dynamic-setting system-font-setting font-render-setting cairo move-toolbar gtk x-toolkit x multi-tty make-network-process nativecomp emacs) Memory information: ((conses 16 127769 8508) (symbols 48 9903 1) (strings 32 28404 3154) (string-bytes 1 966479) (vectors 16 20433) (vector-slots 8 353075 22979) (floats 8 42 108) (intervals 56 2965 0) (buffers 992 16)) -- Alexis Praga