The following patch fixes the issue for me, diff --git a/lisp/image.el b/lisp/image.el index 29c39c5dd5..9221057bce 100644 --- a/lisp/image.el +++ b/lisp/image.el @@ -51,7 +51,7 @@ image-type-header-regexps ("\\`\\(?:MM\0\\*\\|II\\*\0\\)" . tiff) ("\\`[\t\n\r ]*%!PS" . postscript) ("\\`\xff\xd8" . jpeg) ; used to be (image-jpeg-p . jpeg) - ("\\`RIFF....WEBPVP8" . webp) + ("\\`RIFF[^z-a][^z-a][^z-a][^z-a]WEBPVP8" . webp) (,(let* ((incomment-re "\\(?:[^-]\\|-[^-]\\)") (comment-re (concat "\\(?:!--" incomment-re "*-->[ \t\r\n]*<\\)"))) (concat "\\(?:<\\?xml[ \t\r\n]+[^>]*>\\)?[ \t\r\n]*<" [ [^z-a] is documented in (info "(elisp) Regexp Special"). ] In GNU Emacs 29.0.60 (build 2, x86_64-pc-linux-gnu, X toolkit, Xaw scroll bars) of 2023-03-23 built on astatine Repository revision: be8147c53f9dd2d896c27d5b32bf4f38b0af9b3f Repository branch: emacs-29 Windowing system distributor 'The X.Org Foundation', version 11.0.12101004 System Description: Debian GNU/Linux bookworm/sid Configured using: 'configure --with-sound=alsa --with-x-toolkit=lucid --with-json --without-xaw3d --without-gconf --without-libsystemd --without-cairo' Configured features: ACL DBUS FREETYPE GIF GLIB GMP GNUTLS GPM GSETTINGS HARFBUZZ JPEG JSON LIBOTF LIBSELINUX LIBXML2 MODULES NOTIFY INOTIFY PDUMPER PNG RSVG SECCOMP SOUND SQLITE3 THREADS TIFF TOOLKIT_SCROLL_BARS WEBP X11 XDBE XFT XIM XINPUT2 XPM LUCID ZLIB Important settings: value of $LC_MONETARY: ta_IN.UTF-8 value of $LC_NUMERIC: ta_IN.UTF-8 value of $LANG: en_GB.UTF-8 locale-coding-system: utf-8-unix Major mode: Lisp Interaction Minor modes in effect: hexl-follow-ascii: t csv-field-index-mode: t recentf-mode: t shell-dirtrack-mode: t server-mode: t paredit-mode: t eros-mode: t flymake-mode: t pdf-occur-global-minor-mode: t minibuffer-depth-indicate-mode: t repeat-mode: t display-time-mode: t display-battery-mode: t delete-selection-mode: t xterm-mouse-mode: t straight-use-package-mode: t straight-package-neutering-mode: t tooltip-mode: t global-eldoc-mode: t eldoc-mode: t show-paren-mode: t electric-indent-mode: t mouse-wheel-mode: t use-hard-newlines: t tab-bar-history-mode: t tab-bar-mode: t file-name-shadow-mode: t global-font-lock-mode: t font-lock-mode: t undelete-frame-mode: t transient-mark-mode: t auto-composition-mode: t auto-encryption-mode: t auto-compression-mode: t abbrev-mode: t Load-path shadows: None found. Features: (ruler-mode hl-line hexl expand-region text-mode-expansions cc-mode-expansions the-org-mode-expansions python-el-fgallina-expansions er-basic-expansions expand-region-core ...) Memory information: ((conses 16 5541494 789498) (symbols 48 70186 141) (strings 32 495814 72788) (string-bytes 1 144111870) (vectors 16 216791) (vector-slots 8 4288415 706143) (floats 8 37436 2621) (intervals 56 497259 17293) (buffers 976 448))