bug#48324: 27.2; hexl-mode duplicates the UTF-8 BOM

[Eli Zaretskii]

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> From: "R. Diez" <rdiezmail-emacs@yahoo.de>
> Date: Mon, 10 May 2021 16:36:45 +0200
> 
> > I cannot reproduce this.  Are you sure you are using hexl executable
> > which came with Emacs 27.2 and not some older/incompatible version?
> > Are you sure your hexl.el is the one which came with Emacs 27.2?
> 
> I am running Ubuntu MATE 20.04.2, but I built Emacs myself.
> 
> When I ask for help on hexl-mode and follow the link, I end up in this file:
> 
> ~/rdiez/LocalSoftware/Emacs/emacs-27.2-bin/share/emacs/27.2/lisp/hexl.el.gz
> 
> There is no hexl executable on the PATH as far as I can tell, but there is 
> one here:
> 
> /home/rdiez/rdiez/LocalSoftware/Emacs/emacs-27.2-bin/libexec/emacs/27.2/x86_64-pc-linux-gnu/hexl

Strange.  All of the above sounds fine, and yet I cannot reproduce the
problem here.

Is anyone else able to reproduce it?

> The full system information is:
> 
> In GNU Emacs 27.2 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.24.20, cairo 
> version 1.16.0)
>   of 2021-05-08 built on rdiez4
> Windowing system distributor 'The X.Org Foundation', version 11.0.12009000
> System Description: Ubuntu 20.04.2 LTS
> 
> Recent messages:
> Mark set
> Mark saved where search started
> Mark set
> Making completion list... [2 times]
> Quit [2 times]
> user-error: No window up from selected window
> user-error: You didn’t specify a function symbol
> Type C-x 1 to delete the help window, C-M-v to scroll help.
> Mark set [3 times]
> Making completion list...
> 
> Configured using:
>   'configure 'CFLAGS=-g3 -O3 -march=native -flto' --with-x-toolkit=gtk3
>   --with-cairo --with-xwidgets
>   --prefix=/home/rdiez/rdiez/LocalSoftware/Emacs/emacs-27.2-bin'
> 
> Configured features:
> XPM JPEG TIFF GIF PNG RSVG CAIRO SOUND GPM DBUS GSETTINGS GLIB NOTIFY
> INOTIFY ACL LIBSELINUX GNUTLS LIBXML2 FREETYPE HARFBUZZ M17N_FLT LIBOTF
> ZLIB TOOLKIT_SCROLL_BARS GTK3 X11 XDBE XIM MODULES THREADS XWIDGETS
> LIBSYSTEMD JSON PDUMPER LCMS2 GMP
> 
> Important settings:
>    value of $LC_MONETARY: de_DE.UTF-8
>    value of $LC_NUMERIC: de_DE.UTF-8
>    value of $LC_TIME: de_DE.UTF-8
>    value of $LANG: en_US.UTF-8
>    locale-coding-system: utf-8-unix
> 
> Major mode: Term
> 
> Minor modes in effect:
>    hexl-follow-ascii: t
>    global-undo-tree-mode: t
>    save-place-mode: t
>    which-key-mode: t
>    hes-mode: t
>    tabbar-mwheel-mode: t
>    tabbar-mode: t
>    shell-dirtrack-mode: t
>    recentf-mode: t
>    xterm-mouse-mode: t
>    savehist-mode: t
>    dtrt-indent-global-mode: t
>    override-global-mode: t
>    delete-selection-mode: t
>    show-paren-mode: t
>    tooltip-mode: t
>    global-eldoc-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
>    auto-composition-mode: t
>    auto-encryption-mode: t
>    auto-compression-mode: t
>    buffer-read-only: t
>    column-number-mode: t
>    line-number-mode: 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
> text-property-search mm-decode mm-bodies mm-encode mail-parse rfc2231
> mailabbrev gmm-utils mailheader sendmail rfc2047 rfc2045 ietf-drums
> mm-util mail-prsvr mail-utils jka-compr eieio-opt speedbar sb-image
> ezimage dframe find-func help-fns radix-tree hexl texinfo dired-aux
> find-dired ffap thingatpt grep misearch multi-isearch pp vc-git
> diff-mode perl-mode bm cc-mode cc-fonts cc-guess cc-menus cc-cmds etags
> fileloop generator xref project dired-single undo-tree diff iso-transl
> multi-term saveplace which-key highlight-escape-sequences cc-styles
> cc-align cc-engine cc-vars cc-defs dired dired-loaddefs compile term
> disp-table ehelp tabbar tab-line tramp-cache tramp-sh tramp
> tramp-loaddefs trampver tramp-integration files-x tramp-compat shell
> pcomplete comint ansi-color parse-time iso8601 time-date ls-lisp
> format-spec recentf tree-widget xt-mouse savehist auto-package-update
> dash paradox paradox-menu paradox-commit-list hydra ring lv cus-edit
> wid-edit paradox-execute paradox-github paradox-core spinner pod-mode
> edmacro kmacro cl dtrt-indent advice cl-extra help-mode ascii server
> windmove diminish use-package use-package-ensure use-package-delight
> use-package-diminish use-package-bind-key bind-key easy-mmode
> use-package-core finder-inf delsel paren display-fill-column-indicator
> cua-base cus-start cus-load info package easymenu browse-url
> url-handlers url-parse auth-source cl-seq eieio eieio-core cl-macs
> eieio-loaddefs password-cache json subr-x map url-vars seq byte-opt gv
> bytecomp byte-compile cconv cl-loaddefs cl-lib 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 timer
> select scroll-bar mouse jit-lock font-lock syntax facemenu 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 loaddefs
> button faces cus-face macroexp files 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 xwidget-internal cairo
> move-toolbar gtk x-toolkit x multi-tty make-network-process emacs)
> 
> Memory information:
> ((conses 16 455117 44468)
>   (symbols 48 25447 5)
>   (strings 32 111754 4403)
>   (string-bytes 1 3303255)
>   (vectors 16 43189)
>   (vector-slots 8 1337820 193116)
>   (floats 8 264 219)
>   (intervals 56 17564 0)
>   (buffers 1000 30))
> 
> Regards,
>    rdiez
> 
>