This is a minor problem only. But I've stumbled over it, working on new Tramp tests. Any objection to install the patch? In GNU Emacs 27.0.50 (build 14, x86_64-pc-linux-gnu, GTK+ Version 3.22.24) of 2017-11-23 built on detlef Repository revision: 0092a856ff3900c3771408893fb7fd8d731de568 Windowing system distributor 'The X.Org Foundation', version 11.0.11905000 System Description: Ubuntu 17.10 Recent messages: Buffer B: Processing difference region 0 of 2 Processing difference regions ... done Refining difference region 1 ... Saving file /usr/local/src/emacs/lisp/ls-lisp.el... Wrote /usr/local/src/emacs/lisp/ls-lisp.el ls-lisp-format Continue... nil Type C-x 1 to delete the help window, C-M-v to scroll help. Mark set Configured using: 'configure --with-file-notification=inotify' Configured features: XPM JPEG TIFF GIF PNG RSVG IMAGEMAGICK SOUND GPM DBUS GSETTINGS NOTIFY ACL LIBSELINUX GNUTLS LIBXML2 FREETYPE M17N_FLT LIBOTF XFT ZLIB TOOLKIT_SCROLL_BARS GTK3 X11 LCMS2 Important settings: value of $LANG: en_US.UTF-8 value of $XMODIFIERS: @im=none locale-coding-system: utf-8 Major mode: Lisp Interaction Minor modes in effect: diff-auto-refine-mode: t erc-notify-mode: t erc-notifications-mode: t erc-list-mode: t erc-menu-mode: t erc-autojoin-mode: t erc-ring-mode: t erc-networks-mode: t erc-pcomplete-mode: t erc-track-mode: t erc-match-mode: t erc-button-mode: t erc-fill-mode: t erc-stamp-mode: t erc-netsplit-mode: t erc-irccontrols-mode: t erc-noncommands-mode: t erc-move-to-prompt-mode: t erc-readonly-mode: t url-handler-mode: t display-time-mode: t shell-dirtrack-mode: t icomplete-mode: t show-paren-mode: t tooltip-mode: t global-eldoc-mode: t 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 column-number-mode: t line-number-mode: t transient-mark-mode: t Load-path shadows: /home/albinus/src/elpa/packages/debbugs/debbugs-org hides /home/albinus/.emacs.d/elpa/debbugs-0.14/debbugs-org /home/albinus/src/elpa/packages/debbugs/debbugs-gnu hides /home/albinus/.emacs.d/elpa/debbugs-0.14/debbugs-gnu /home/albinus/src/elpa/packages/debbugs/debbugs hides /home/albinus/.emacs.d/elpa/debbugs-0.14/debbugs /home/albinus/src/elpa/packages/debbugs/debbugs-autoloads hides /home/albinus/.emacs.d/elpa/debbugs-0.14/debbugs-autoloads /home/albinus/src/elpa/packages/debbugs/debbugs-pkg hides /home/albinus/.emacs.d/elpa/debbugs-0.14/debbugs-pkg /home/albinus/src/elpa/packages/debbugs/debbugs-browse hides /home/albinus/.emacs.d/elpa/debbugs-0.14/debbugs-browse /home/albinus/.emacs.d/elpa/counsel-20171101.1121/counsel hides /home/albinus/.emacs.d/elpa/ivy-0.9.1/counsel /home/albinus/.emacs.d/elpa/swiper-20171105.42/swiper hides /home/albinus/.emacs.d/elpa/ivy-0.9.1/swiper /home/albinus/src/elpa/packages/tramp-theme/tramp-theme hides /home/albinus/.emacs.d/elpa/tramp-theme-0.2/tramp-theme /home/albinus/src/elpa/packages/tramp-theme/tramp-theme-autoloads hides /home/albinus/.emacs.d/elpa/tramp-theme-0.2/tramp-theme-autoloads /home/albinus/src/elpa/packages/tramp-theme/tramp-theme-pkg hides /home/albinus/.emacs.d/elpa/tramp-theme-0.2/tramp-theme-pkg /home/albinus/.emacs.d/elpa/telepathy-20131209.458/telepathy hides ~/lisp/telepathy ~/src/tramp/lisp/tramp-smb hides /usr/local/src/emacs/lisp/net/tramp-smb ~/src/tramp/lisp/tramp-uu hides /usr/local/src/emacs/lisp/net/tramp-uu ~/src/tramp/lisp/tramp-adb hides /usr/local/src/emacs/lisp/net/tramp-adb ~/src/tramp/lisp/tramp-cmds hides /usr/local/src/emacs/lisp/net/tramp-cmds ~/src/tramp/lisp/tramp-cache hides /usr/local/src/emacs/lisp/net/tramp-cache ~/src/tramp/lisp/trampver hides /usr/local/src/emacs/lisp/net/trampver ~/src/tramp/lisp/tramp-ftp hides /usr/local/src/emacs/lisp/net/tramp-ftp ~/src/tramp/lisp/tramp-sh hides /usr/local/src/emacs/lisp/net/tramp-sh ~/src/tramp/lisp/tramp hides /usr/local/src/emacs/lisp/net/tramp ~/src/tramp/lisp/tramp-loaddefs hides /usr/local/src/emacs/lisp/net/tramp-loaddefs ~/lisp/dbus hides /usr/local/src/emacs/lisp/net/dbus ~/src/tramp/lisp/tramp-gvfs hides /usr/local/src/emacs/lisp/net/tramp-gvfs ~/src/tramp/lisp/tramp-compat hides /usr/local/src/emacs/lisp/net/tramp-compat Features: (shadow sort mail-extr warnings emacsbug message rmc puny rfc822 mml mml-sec epa derived epg gnus-util rmail rmail-loaddefs mm-decode mm-bodies mm-encode mail-parse rfc2231 mailabbrev gmm-utils mailheader sendmail rfc2047 rfc2045 ietf-drums mm-util mail-prsvr mail-utils add-log log-view pcvs-util ediff-vers ediff-merg ediff-wind ediff-diff ediff-mult ediff-help ediff-init ediff-util ediff erc-replace magit-utils crm cus-edit descr-text time-stamp misearch multi-isearch tramp-adb tramp-cmds tramp-ftp cl-print edebug eieio-opt speedbar sb-image ezimage dframe help-fns radix-tree ls-lisp files-x cl-extra help-mode tramp-archive-tests tramp-archive tramp-gvfs zeroconf url-util ert find-func ewoc debug vc-hg vc-git diff-mode easy-mmode bug-reference map cus-start cus-load elec-pair erc-notify erc-desktop-notifications notifications dbus xml erc-list erc-menu erc-join erc-ring erc-networks erc-pcomplete erc-track erc-match erc-button wid-edit erc-fill erc-stamp erc-netsplit erc-goodies erc erc-backend erc-compat thingatpt pp cperl-mode tramp-theme em-dirs esh-var esh-io esh-cmd esh-opt esh-ext esh-proc esh-arg esh-groups eshell esh-module esh-mode esh-util finder-inf rx docker-tramp tramp-cache slime-autoloads vagrant-tramp dash term disp-table ehelp info package easymenu epg-config url-handlers url-parse url-vars time tramp-sh tramp tramp-compat tramp-loaddefs trampver ucs-normalize shell pcomplete comint ansi-color ring parse-time format-spec advice auth-source cl-seq eieio eieio-core cl-macs eieio-loaddefs password-cache ido seq byte-opt gv bytecomp byte-compile cconv jka-compr icomplete paren vc cl-loaddefs cl-lib vc-dispatcher dired dired-loaddefs time-date mule-util 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 menu-bar rfn-eshadow isearch timer select scroll-bar mouse jit-lock font-lock syntax facemenu font-core term/tty-colors frame 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 minibuffer 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 dbusbind inotify lcms2 dynamic-setting system-font-setting font-render-setting move-toolbar gtk x-toolkit x multi-tty make-network-process emacs) Memory information: ((conses 16 591729 78592) (symbols 48 51583 5) (miscs 40 1187 1629) (strings 32 163059 9766) (string-bytes 1 4144809) (vectors 16 66157) (vector-slots 8 2194248 184812) (floats 8 143 706) (intervals 56 12315 1573) (buffers 992 44))