GNU bug report logs - #29070
26.0.90; (file-attributes dir) => nil, even though (and (file-exists-p dir) (file-directory-p dir)) => t

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: rrandresf <at> gmail.com
To: bug-gnu-emacs <at> gnu.org
Subject: 26.0.90; emacs-26.0.90 pretest
Date: Mon, 30 Oct 2017 14:02:15 -0600

Hi. after compiling the pretest. I do emacs -Q then M-x server-start then
I am getting:
--8<---------------cut here---------------start------------->8---
Debugger entered--Lisp error: (error "‘/tmp/emacs1000’ is not a safe directory because it is a file")
  signal(error ("‘/tmp/emacs1000’ is not a safe directory because it is a file"))
  error("`%s' is not a safe directory because %s" "/tmp/emacs1000" "it is a file")
  server-ensure-safe-dir("/tmp/emacs1000")
  server-start(nil)
  funcall-interactively(server-start nil)
  call-interactively(server-start record nil)
  command-execute(server-start record)
  execute-extended-command(nil "server-start" nil)
  funcall-interactively(execute-extended-command nil "server-start" nil)
  call-interactively(execute-extended-command nil nil)
  command-execute(execute-extended-command)
--8<---------------cut here---------------end--------------->8---

Regards


In GNU Emacs 26.0.90 (build 1, arm-unknown-linux-gnueabihf, X toolkit, Xaw3d scroll bars)
 of 2017-10-30 built on chulpaca
Windowing system distributor 'The X.Org Foundation', version 11.0.11804000
System Description:	Debian GNU/Linux 9.2 (stretch)

Recent messages:
For information about GNU Emacs and the GNU system, type C-h C-a.
server-ensure-safe-dir: ‘/tmp/emacs1000’ is not a safe directory because it is a file
C-x M-x is undefined

Configured using:
 'configure --build=arm-linux-gnueabihf --prefix=/usr
 '--includedir=${prefix}/include' '--mandir=${prefix}/share/man'
 '--infodir=${prefix}/share/info' --sysconfdir=/etc --localstatedir=/var
 --disable-silent-rules '--libdir=${prefix}/lib/arm-linux-gnueabihf'
 '--libexecdir=${prefix}/lib/arm-linux-gnueabihf'
 --disable-maintainer-mode --disable-dependency-tracking --prefix=/usr
 --sysconfdir=/etc --libexecdir=/usr/lib --localstatedir=/var
 --with-x-toolkit=lucid --mandir=/usr/share/man
 --pdfdir=/usr/share/doc/emacs --with-sound --without-gconf --with-xft
 --without-xwidgets --with-gameuser=:games 'CFLAGS=-g -O2
 -fdebug-prefix-map=/home/soni/abs/emacs-26.0.90=. -fstack-protector-strong
 -Wformat -Werror=format-security' 'CPPFLAGS=-Wdate-time
 -D_FORTIFY_SOURCE=2' LDFLAGS=-Wl,-z,relro'

Configured features:
XAW3D XPM JPEG TIFF GIF PNG RSVG IMAGEMAGICK SOUND DBUS GSETTINGS NOTIFY
GNUTLS LIBXML2 FREETYPE XFT ZLIB TOOLKIT_SCROLL_BARS LUCID X11 LCMS2

Important settings:
  value of $LC_COLLATE: C
  value of $LC_MESSAGES: en_US.UTF-8
  value of $LANG: en_US.UTF-8
  locale-coding-system: utf-8-unix

Major mode: Lisp Interaction

Minor modes in effect:
  tooltip-mode: t
  global-eldoc-mode: t
  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
  line-number-mode: t
  transient-mark-mode: t

Load-path shadows:
None found.

Features:
(shadow sort mail-extr emacsbug message rmc puny seq byte-opt gv
bytecomp byte-compile cconv cl-loaddefs cl-lib dired dired-loaddefs
format-spec rfc822 mml easymenu mml-sec password-cache epa derived epg
epg-config 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 server elec-pair
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
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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 x-toolkit x
multi-tty make-network-process emacs)

Memory information:
((conses 8 96243 9175)
 (symbols 24 20650 1)
 (miscs 20 39 160)
 (strings 16 29484 1575)
 (string-bytes 1 753255)
 (vectors 8 14215)
 (vector-slots 4 506728 10982)
 (floats 8 51 66)
 (intervals 28 274 11)
 (buffers 528 11))

Message #8 received at 29070 <at> debbugs.gnu.org (full text, mbox):

From: Noam Postavsky <npostavs <at> users.sourceforge.net>
To: rrandresf <at> gmail.com
Cc: 29070 <at> debbugs.gnu.org
Subject: Re: bug#29070: 26.0.90; emacs-26.0.90 pretest
Date: Mon, 30 Oct 2017 16:14:18 -0400

On Mon, Oct 30, 2017 at 4:02 PM,  <rrandresf <at> gmail.com> wrote:
>
> Hi. after compiling the pretest. I do emacs -Q then M-x server-start then
> I am getting:
> --8<---------------cut here---------------start------------->8---
> Debugger entered--Lisp error: (error "‘/tmp/emacs1000’ is not a safe directory because it is a file")

So is /tmp/emacs1000 a file and not a directory? Or is the message incorrect?

Message #11 received at 29070 <at> debbugs.gnu.org (full text, mbox):

From: "rrandresf <at> gmail.com" <rrandresf <at> gmail.com>
To: Noam Postavsky <npostavs <at> users.sourceforge.net>
Cc: 29070 <at> debbugs.gnu.org
Subject: Re: bug#29070: 26.0.90; emacs-26.0.90 pretest
Date: Mon, 30 Oct 2017 15:25:51 -0600

Emacs has created a directory. It creates it with 'server-start'
--
Andrés Ramirez Ramos
Development Engineer
Web:rrandresf.googlepages.com


On Mon, Oct 30, 2017 at 2:14 PM, Noam Postavsky
<npostavs <at> users.sourceforge.net> wrote:
> On Mon, Oct 30, 2017 at 4:02 PM,  <rrandresf <at> gmail.com> wrote:
>>
>> Hi. after compiling the pretest. I do emacs -Q then M-x server-start then
>> I am getting:
>> --8<---------------cut here---------------start------------->8---
>> Debugger entered--Lisp error: (error "‘/tmp/emacs1000’ is not a safe directory because it is a file")
>
> So is /tmp/emacs1000 a file and not a directory? Or is the message incorrect?

Message #14 received at 29070 <at> debbugs.gnu.org (full text, mbox):

From: Noam Postavsky <npostavs <at> users.sourceforge.net>
To: "rrandresf <at> gmail.com" <rrandresf <at> gmail.com>
Cc: 29070 <at> debbugs.gnu.org
Subject: Re: bug#29070: 26.0.90; emacs-26.0.90 pretest
Date: Mon, 30 Oct 2017 17:38:54 -0400

On Mon, Oct 30, 2017 at 5:25 PM, rrandresf <at> gmail.com
<rrandresf <at> gmail.com> wrote:
> Emacs has created a directory. It creates it with 'server-start'

What does evaluating (file-attributes "/tmp/emacs1000" 'integer) give
you? Does it start with t or nil?

Message #17 received at 29070 <at> debbugs.gnu.org (full text, mbox):

From: "rrandresf <at> gmail.com" <rrandresf <at> gmail.com>
To: Noam Postavsky <npostavs <at> users.sourceforge.net>
Cc: 29070 <at> debbugs.gnu.org
Subject: Re: bug#29070: 26.0.90; emacs-26.0.90 pretest
Date: Mon, 30 Oct 2017 16:41:05 -0600

(t 2 1000 1000
   (23031 33692 430033 322000)
   (23031 41122 259655 752000)
   (23031 41122 259655 752000)
   60 "drwx------" t 545119 28)

On Mon, Oct 30, 2017 at 3:38 PM, Noam Postavsky
<npostavs <at> users.sourceforge.net> wrote:
> On Mon, Oct 30, 2017 at 5:25 PM, rrandresf <at> gmail.com
> <rrandresf <at> gmail.com> wrote:
>> Emacs has created a directory. It creates it with 'server-start'
>
> What does evaluating (file-attributes "/tmp/emacs1000" 'integer) give
> you? Does it start with t or nil?

Message #20 received at 29070 <at> debbugs.gnu.org (full text, mbox):

From: Noam Postavsky <npostavs <at> users.sourceforge.net>
To: "rrandresf\@gmail.com" <rrandresf <at> gmail.com>
Cc: 29070 <at> debbugs.gnu.org
Subject: Re: bug#29070: 26.0.90; emacs-26.0.90 pretest
Date: Mon, 30 Oct 2017 19:07:27 -0400

"rrandresf <at> gmail.com" <rrandresf <at> gmail.com> writes:

> (t 2 1000 1000
>    (23031 33692 430033 322000)
>    (23031 41122 259655 752000)
>    (23031 41122 259655 752000)
>    60 "drwx------" t 545119 28)
>

I can't work out how you could be getting this error, the message you
posted should only occur if the car of the attribute list is not t:

           (unsafe (cond
                    ((not (eq t (car attrs)))
                     (format "it is a %s" (if (stringp (car attrs))
                                              "symlink" "file")))

Could you do M-x load-library RET server.el RET to load the source and
get a more detailed backtrace please.  It should like something like
this:

Debugger entered--Lisp error: (error "‘/tmp/foo’ is not a safe directory because it is a file")
  signal(error ("‘/tmp/foo’ is not a safe directory because it is a file"))
  error("`%s' is not a safe directory because %s" "/tmp/foo" "it is a file")
  (progn (error "`%s' is not a safe directory because %s" dir unsafe))
  (if unsafe (progn (error "`%s' is not a safe directory because %s" dir unsafe)))
  (let* ((uid (nth 2 attrs)) (w32 (eq system-type 'windows-nt)) (unsafe (cond ((not ....
  (let ((attrs (file-attributes dir 'integer))) (if attrs nil (let* ((old (default-file-...
  server-ensure-safe-dir("/tmp/foo")
  ...

And then hit 'v' on the "(let" lines to show local variables, so that it
looks like this:

Debugger entered--Lisp error: (error "‘/tmp/foo’ is not a safe directory because it is a file")
  signal(error ("‘/tmp/foo’ is not a safe directory because it is a file"))
  error("`%s' is not a safe directory because %s" "/tmp/foo" "it is a file")
  (progn (error "`%s' is not a safe directory because %s" dir unsafe))
  (if unsafe (progn (error "`%s' is not a safe directory because %s" dir unsafe)))
  (let* ((uid (nth 2 attrs)) (w32 (eq system-type 'windows-nt)) (unsafe (cond ((not (eq t (car attr...
    dir = "/tmp/foo"
    attrs = (nil 1 1000 1000 (23031 44726 989651 161000) (23031 44726 989651 161000) (23031 44726 989651 161000) 0 "-rw-r--r--" t 3014718 2052)
    uid = 1000
    w32 = nil
    unsafe = "it is a file"
  (let ((attrs (file-attributes dir 'integer))) (if attrs nil (let* ((old (default-file-modes)))...
    dir = "/tmp/foo"
    attrs = (nil 1 1000 1000 (23031 44726 989651 161000) (23031 44726 989651 161000) (23031 44726 989651 161000) 0 "-rw-r--r--" t 3014718 2052)
  server-ensure-safe-dir("/tmp/foo")

Message #23 received at 29070 <at> debbugs.gnu.org (full text, mbox):

From: andrés ramírez <rrandresf <at> gmail.com>
To: Noam Postavsky <npostavs <at> users.sourceforge.net>
Cc: 29070 <at> debbugs.gnu.org
Subject: Re: bug#29070: 26.0.90; emacs-26.0.90 pretest
Date: Mon, 30 Oct 2017 17:36:13 -0600

On Mon, 30 Oct 2017 17:07:27 -0600,
Noam Postavsky wrote:
> 
> "rrandresf <at> gmail.com" <rrandresf <at> gmail.com> writes:
> 
> > (t 2 1000 1000
> >    (23031 33692 430033 322000)
> >    (23031 41122 259655 752000)
> >    (23031 41122 259655 752000)
> >    60 "drwx------" t 545119 28)
Noam above was wrong: what I got was nil (tried it on another emacs,
sorry)

> Could you do M-x load-library RET server.el RET to load the source and
> get a more detailed backtrace please.  It should like something like
> this:

btw: I have done also (setq server-name "pe")

--8<---------------cut here---------------start------------->8---
Debugger entered--Lisp error: (error "‘/tmp/emacs1000’ is not a safe directory because it is a file")
  signal(error ("‘/tmp/emacs1000’ is not a safe directory because it is a file"))
  error("`%s' is not a safe directory because %s" "/tmp/emacs1000" "it is a file")
  (progn (error "`%s' is not a safe directory because %s" dir unsafe))
  (if unsafe (progn (error "`%s' is not a safe directory because %s" dir unsafe)))
  (let* ((uid (nth 2 attrs)) (w32 (eq system-type 'windows-nt)) (unsafe (cond ((not (eq t (car attrs))) (format "it is a %s" (if (stringp (car attrs)) "symlink" "file"))) ((and w32 (= 0 uid)) (display-warning 'server (format-message "Using `%s' to store Emacs-server authentication files.\nDirectories on FAT32 filesystems are NOT secure against tampering.\nSee variable `server-auth-dir' for details." (file-name-as-directory dir)) :warning) nil) ((and (/= uid (user-uid)) (or (not w32) (/= uid 544) (/= (user-uid) 500))) (format "it is not owned by you (owner = %s (%d))" (user-full-name (user-uid)) (user-uid))) (w32 nil) ((/= 0 (logand 63 (file-modes dir))) (format "it is accessible by others (%03o)" (file-modes dir))) (t nil)))) (if unsafe (progn (error "`%s' is not a safe directory because %s" dir unsafe))))
    dir = "/tmp/emacs1000"
    attrs = nil
    uid = nil
    w32 = nil
    unsafe = "it is a file"
  (let ((attrs (file-attributes dir 'integer))) (if attrs nil (let* ((old (default-file-modes))) (unwind-protect (progn (progn (set-default-file-modes 448) 448) (make-directory dir t)) (let* ((v old)) (progn (set-default-file-modes v) v)))) (setq attrs (file-attributes dir 'integer))) (let* ((uid (nth 2 attrs)) (w32 (eq system-type 'windows-nt)) (unsafe (cond ((not (eq t (car attrs))) (format "it is a %s" (if (stringp (car attrs)) "symlink" "file"))) ((and w32 (= 0 uid)) (display-warning 'server (format-message "Using `%s' to store Emacs-server authentication files.\nDirectories on FAT32 filesystems are NOT secure against tampering.\nSee variable `server-auth-dir' for details." (file-name-as-directory dir)) :warning) nil) ((and (/= uid (user-uid)) (or (not w32) (/= uid 544) (/= (user-uid) 500))) (format "it is not owned by you (owner = %s (%d))" (user-full-name (user-uid)) (user-uid))) (w32 nil) ((/= 0 (logand 63 (file-modes dir))) (format "it is accessible by others (%03o)" (file-modes dir))) (t nil)))) (if unsafe (progn (error "`%s' is not a safe directory because %s" dir unsafe)))))
    dir = "/tmp/emacs1000"
    attrs = nil
  server-ensure-safe-dir("/tmp/emacs1000")
  (if leave-dead (progn (if (eq t leave-dead) nil (server-log (message "Server stopped"))) (setq server-process nil)) (server-ensure-safe-dir server-dir) (if server-process (progn (server-log (message "Restarting server")))) (let* ((old (default-file-modes))) (unwind-protect (progn (progn (set-default-file-modes 448) 448) (add-hook 'suspend-tty-functions 'server-handle-suspend-tty) (add-hook 'delete-frame-functions 'server-handle-delete-frame) (add-hook 'kill-emacs-query-functions 'server-kill-emacs-query-function) (add-hook 'kill-emacs-hook 'server-force-stop t) (setq server-process (apply (function make-network-process) :name server-name :server t :noquery t :sentinel (function server-sentinel) :filter (function server-process-filter) :use-external-socket t :coding 'raw-text-unix (if server-use-tcp (list :family 'ipv4 :service (or server-port t) :host (or server-host 'local) :plist '(:authenticated nil)) (list :family 'local :service server-file :plist '(:authenticated t))))) (if server-process nil (error "Could not start server process")) (process-put server-process :server-file server-file) (if server-use-tcp (progn (let ((auth-key (server-get-auth-key))) (process-put server-process :auth-key auth-key) (let ((temp-file server-file) (temp-buffer (get-buffer-create (generate-new-buffer-name " *temp file*")))) (unwind-protect (prog1 (save-current-buffer (set-buffer temp-buffer) (set-buffer-multibyte nil) (setq buffer-file-coding-system 'no-conversion) (insert (format-network-address (process-contact server-process :local)) " " (number-to-string (emacs-pid)) "\n" auth-key)) (save-current-buffer (set-buffer temp-buffer) (write-region nil nil temp-file nil 0))) (and (buffer-name temp-buffer) (kill-buffer temp-buffer)))))))) (let* ((v old)) (progn (set-default-file-modes v) v)))))
  (let* ((server-dir (if server-use-tcp server-auth-dir server-socket-dir)) (server-file (expand-file-name server-name server-dir))) (if server-process (progn (condition-case nil (progn (delete-process server-process)) (error nil)))) (if (not (eq t (server-running-p server-name))) (condition-case nil (progn (let (delete-by-moving-to-trash) (delete-file server-file))) (error nil)) (setq server-mode nil) (display-warning 'server (concat "Unable to start the Emacs server.\n" (format "There is an existing Emacs server, named %S.\n" server-name) (substitute-command-keys "To start the server in this Emacs process, stop the existing\nserver or call `\\[server-force-delete]' to forcibly disconnect it.")) :warning) (setq leave-dead t)) (while server-clients (server-delete-client (car server-clients))) (if leave-dead (progn (if (eq t leave-dead) nil (server-log (message "Server stopped"))) (setq server-process nil)) (server-ensure-safe-dir server-dir) (if server-process (progn (server-log (message "Restarting server")))) (let* ((old (default-file-modes))) (unwind-protect (progn (progn (set-default-file-modes 448) 448) (add-hook 'suspend-tty-functions 'server-handle-suspend-tty) (add-hook 'delete-frame-functions 'server-handle-delete-frame) (add-hook 'kill-emacs-query-functions 'server-kill-emacs-query-function) (add-hook 'kill-emacs-hook 'server-force-stop t) (setq server-process (apply (function make-network-process) :name server-name :server t :noquery t :sentinel (function server-sentinel) :filter (function server-process-filter) :use-external-socket t :coding 'raw-text-unix (if server-use-tcp (list :family 'ipv4 :service (or server-port t) :host (or server-host 'local) :plist '(:authenticated nil)) (list :family 'local :service server-file :plist '(:authenticated t))))) (if server-process nil (error "Could not start server process")) (process-put server-process :server-file server-file) (if server-use-tcp (progn (let ((auth-key (server-get-auth-key))) (process-put server-process :auth-key auth-key) (let ((temp-file server-file) (temp-buffer (get-buffer-create (generate-new-buffer-name " *temp file*")))) (unwind-protect (prog1 (save-current-buffer (set-buffer temp-buffer) (set-buffer-multibyte nil) (setq buffer-file-coding-system 'no-conversion) (insert (format-network-address (process-contact server-process :local)) " " (number-to-string (emacs-pid)) "\n" auth-key)) (save-current-buffer (set-buffer temp-buffer) (write-region nil nil temp-file nil 0))) (and (buffer-name temp-buffer) (kill-buffer temp-buffer)))))))) (let* ((v old)) (progn (set-default-file-modes v) v))))))
    leave-dead = nil
    inhibit-prompt = nil
    server-dir = "/tmp/emacs1000"
    server-file = "/tmp/emacs1000/pe"
  (progn (let* ((server-dir (if server-use-tcp server-auth-dir server-socket-dir)) (server-file (expand-file-name server-name server-dir))) (if server-process (progn (condition-case nil (progn (delete-process server-process)) (error nil)))) (if (not (eq t (server-running-p server-name))) (condition-case nil (progn (let (delete-by-moving-to-trash) (delete-file server-file))) (error nil)) (setq server-mode nil) (display-warning 'server (concat "Unable to start the Emacs server.\n" (format "There is an existing Emacs server, named %S.\n" server-name) (substitute-command-keys "To start the server in this Emacs process, stop the existing\nserver or call `\\[server-force-delete]' to forcibly disconnect it.")) :warning) (setq leave-dead t)) (while server-clients (server-delete-client (car server-clients))) (if leave-dead (progn (if (eq t leave-dead) nil (server-log (message "Server stopped"))) (setq server-process nil)) (server-ensure-safe-dir server-dir) (if server-process (progn (server-log (message "Restarting server")))) (let* ((old (default-file-modes))) (unwind-protect (progn (progn (set-default-file-modes 448) 448) (add-hook 'suspend-tty-functions 'server-handle-suspend-tty) (add-hook 'delete-frame-functions 'server-handle-delete-frame) (add-hook 'kill-emacs-query-functions 'server-kill-emacs-query-function) (add-hook 'kill-emacs-hook 'server-force-stop t) (setq server-process (apply (function make-network-process) :name server-name :server t :noquery t :sentinel (function server-sentinel) :filter (function server-process-filter) :use-external-socket t :coding 'raw-text-unix (if server-use-tcp (list :family 'ipv4 :service (or server-port t) :host (or server-host 'local) :plist '(:authenticated nil)) (list :family 'local :service server-file :plist '(:authenticated t))))) (if server-process nil (error "Could not start server process")) (process-put server-process :server-file server-file) (if server-use-tcp (progn (let ((auth-key (server-get-auth-key))) (process-put server-process :auth-key auth-key) (let ((temp-file server-file) (temp-buffer (get-buffer-create (generate-new-buffer-name " *temp file*")))) (unwind-protect (prog1 (save-current-buffer (set-buffer temp-buffer) (set-buffer-multibyte nil) (setq buffer-file-coding-system 'no-conversion) (insert (format-network-address (process-contact server-process :local)) " " (number-to-string (emacs-pid)) "\n" auth-key)) (save-current-buffer (set-buffer temp-buffer) (write-region nil nil temp-file nil 0))) (and (buffer-name temp-buffer) (kill-buffer temp-buffer)))))))) (let* ((v old)) (progn (set-default-file-modes v) v)))))))
    [no locals]
  (if (or (not server-clients) (cond ((and (daemonp) (null (cdr (frame-list))) (eq (selected-frame) terminal-frame)) leave-dead) (inhibit-prompt t) (t (yes-or-no-p "The current server still has clients; delete them? ")))) (progn (let* ((server-dir (if server-use-tcp server-auth-dir server-socket-dir)) (server-file (expand-file-name server-name server-dir))) (if server-process (progn (condition-case nil (progn (delete-process server-process)) (error nil)))) (if (not (eq t (server-running-p server-name))) (condition-case nil (progn (let (delete-by-moving-to-trash) (delete-file server-file))) (error nil)) (setq server-mode nil) (display-warning 'server (concat "Unable to start the Emacs server.\n" (format "There is an existing Emacs server, named %S.\n" server-name) (substitute-command-keys "To start the server in this Emacs process, stop the existing\nserver or call `\\[server-force-delete]' to forcibly disconnect it.")) :warning) (setq leave-dead t)) (while server-clients (server-delete-client (car server-clients))) (if leave-dead (progn (if (eq t leave-dead) nil (server-log (message "Server stopped"))) (setq server-process nil)) (server-ensure-safe-dir server-dir) (if server-process (progn (server-log (message "Restarting server")))) (let* ((old (default-file-modes))) (unwind-protect (progn (progn (set-default-file-modes 448) 448) (add-hook 'suspend-tty-functions 'server-handle-suspend-tty) (add-hook 'delete-frame-functions 'server-handle-delete-frame) (add-hook 'kill-emacs-query-functions 'server-kill-emacs-query-function) (add-hook 'kill-emacs-hook 'server-force-stop t) (setq server-process (apply (function make-network-process) :name server-name :server t :noquery t :sentinel (function server-sentinel) :filter (function server-process-filter) :use-external-socket t :coding 'raw-text-unix (if server-use-tcp (list :family 'ipv4 :service (or server-port t) :host (or server-host 'local) :plist '(:authenticated nil)) (list :family 'local :service server-file :plist '(:authenticated t))))) (if server-process nil (error "Could not start server process")) (process-put server-process :server-file server-file) (if server-use-tcp (progn (let ((auth-key (server-get-auth-key))) (process-put server-process :auth-key auth-key) (let ((temp-file server-file) (temp-buffer (get-buffer-create (generate-new-buffer-name " *temp file*")))) (unwind-protect (prog1 (save-current-buffer (set-buffer temp-buffer) (set-buffer-multibyte nil) (setq buffer-file-coding-system 'no-conversion) (insert (format-network-address (process-contact server-process :local)) " " (number-to-string (emacs-pid)) "\n" auth-key)) (save-current-buffer (set-buffer temp-buffer) (write-region nil nil temp-file nil 0))) (and (buffer-name temp-buffer) (kill-buffer temp-buffer)))))))) (let* ((v old)) (progn (set-default-file-modes v) v))))))))
  server-start(nil)
  funcall-interactively(server-start nil)
  call-interactively(server-start record nil)
  command-execute(server-start record)
  execute-extended-command(nil "server-start" "server-start")
  funcall-interactively(execute-extended-command nil "server-start" "server-start")
  call-interactively(execute-extended-command nil nil)
  command-execute(execute-extended-command)
--8<---------------cut here---------------end--------------->8---

Message #26 received at 29070 <at> debbugs.gnu.org (full text, mbox):

From: Noam Postavsky <npostavs <at> users.sourceforge.net>
To: andrés ramírez <rrandresf <at> gmail.com>
Cc: 29070 <at> debbugs.gnu.org
Subject: Re: bug#29070: 26.0.90; emacs-26.0.90 pretest
Date: Mon, 30 Oct 2017 19:52:22 -0400

andrés ramírez <rrandresf <at> gmail.com> writes:

> Noam above was wrong: what I got was nil (tried it on another emacs,
> sorry)


> btw: I have done also (setq server-name "pe")
>
> Debugger entered--Lisp error: (error "‘/tmp/emacs1000’ is not a safe directory because it is a file")
>   signal(error ("‘/tmp/emacs1000’ is not a safe directory because it is a file"))
>   error("`%s' is not a safe directory because %s" "/tmp/emacs1000" "it is a file")
>   (progn (error "`%s' is not a safe directory because %s" dir unsafe))
>   (if unsafe (progn (error "`%s' is not a safe directory because %s" dir unsafe)))
>   (let* ((uid (nth 2 attrs)) (w32 (eq system-type 'windows-nt))...
>     dir = "/tmp/emacs1000"
>     attrs = nil

Hmm, I think that means it doesn't exist (could you double check that by
running 'ls /tmp/emacs1000' in the shell?).  Since
server-ensure-safe-dir tries to create it if it doesn't exist, something
must be deleting it directly after, does that sound plausible?

>     uid = nil
>     w32 = nil
>     unsafe = "it is a file"
>   (let ((attrs (file-attributes dir 'integer))) (if attrs nil (let...
>     dir = "/tmp/emacs1000"
>     attrs = nil
>   server-ensure-safe-dir("/tmp/emacs1000")
>   (if leave-dead...
>   (let* ((server-dir ...
>     leave-dead = nil
>     inhibit-prompt = nil
>     server-dir = "/tmp/emacs1000"
>     server-file = "/tmp/emacs1000/pe"
>   (progn (let* ((server-...
>     [no locals]
>   (if (or (not server-clien...
>   server-start(nil)
>   funcall-interactively(server-start nil)
>   call-interactively(server-start record nil)
>   command-execute(server-start record)
>   execute-extended-command(nil "server-start" "server-start")
>   funcall-interactively(execute-extended-command nil "server-start" "server-start")
>   call-interactively(execute-extended-command nil nil)
>   command-execute(execute-extended-command)

Message #29 received at 29070 <at> debbugs.gnu.org (full text, mbox):

From: andrés ramírez <rrandresf <at> gmail.com>
To: Noam Postavsky <npostavs <at> users.sourceforge.net>
Cc: 29070 <at> debbugs.gnu.org
Subject: Re: bug#29070: 26.0.90; emacs-26.0.90 pretest
Date: Mon, 30 Oct 2017 18:18:34 -0600

On Mon, 30 Oct 2017 17:52:22 -0600,
Noam Postavsky wrote:
> Hmm, I think that means it doesn't exist (could you double check that by
> running 'ls /tmp/emacs1000' in the shell?).  Since
> server-ensure-safe-dir tries to create it if it doesn't exist, something
> must be deleting it directly after, does that sound plausible?
It does not seem plausible.

Noam. I have those 2 other emacs sessions from anothir binary running
--8<---------------cut here---------------start------------->8---
GNU Emacs 26.0.50 (build 1, arm-unknown-linux-gnueabihf, X toolkit, Xaw3d scroll bars)
 of 2017-07-15
--8<---------------cut here---------------end--------------->8---

This is the binary we are debugging:
--8<---------------cut here---------------start------------->8---
GNU Emacs 26.0.90 (build 1, armv7l-unknown-linux-gnueabihf, X toolkit, Xaw3d scroll bars)
 of 2017-10-30
--8<---------------cut here---------------end--------------->8---

--8<---------------cut here---------------start------------->8---
Welcome to the Emacs shell

~ $ ls /tmp/emacs1000
ns  server
~ $
--8<---------------cut here---------------end--------------->8---

Message #32 received at 29070 <at> debbugs.gnu.org (full text, mbox):

From: Noam Postavsky <npostavs <at> users.sourceforge.net>
To: andrés ramírez <rrandresf <at> gmail.com>
Cc: 29070 <at> debbugs.gnu.org
Subject: Re: bug#29070: 26.0.90; emacs-26.0.90 pretest
Date: Mon, 30 Oct 2017 20:41:59 -0400

andrés ramírez <rrandresf <at> gmail.com> writes:

> ~ $ ls /tmp/emacs1000
> ns  server
> ~ $

Hmm, doesn't make sense that it could be disappearing in the middle and
still have other stuff inside.  So that suggests that something is wrong
with the file-attributes function.  Does (file-attributes
"/tmp/emacs1000") consistently give you nil if you evaluate it multiple
times?  What about (file-exists-p "/tmp/emacs1000")?  (file-directory-p
"/tmp/emacs1000")?

Message #35 received at 29070 <at> debbugs.gnu.org (full text, mbox):

From: andrés ramírez <rrandresf <at> gmail.com>
To: Noam Postavsky <npostavs <at> users.sourceforge.net>
Cc: 29070 <at> debbugs.gnu.org
Subject: Re: bug#29070: 26.0.90; emacs-26.0.90 pretest
Date: Mon, 30 Oct 2017 19:59:37 -0600

Hi Noam.
> Hmm, doesn't make sense that it could be disappearing in the middle and
> still have other stuff inside.  So that suggests that something is wrong
> with the file-attributes function.  Does (file-attributes
> "/tmp/emacs1000") consistently give you nil if you evaluate it multiple
> times?  What about (file-exists-p "/tmp/emacs1000")?  (file-directory-p
> "/tmp/emacs1000")?

Yes. Consistently gave me 'nil'. I have evaluated more than 20 times
--8<---------------cut here---------------start------------->8---
Welcome to the Emacs shell

~/abs/emacs-26.0.90/build-arm $ (file-attributes "/tmp/emacs1000")
~/abs/emacs-26.0.90/build-arm $ (file-attributes "/tmp/emacs1000")
~/abs/emacs-26.0.90/build-arm $ (file-exists-p "/tmp/emacs1000")
t
~/abs/emacs-26.0.90/build-arm $ (file-exists-p "/tmp/emacs1000")
t
~/abs/emacs-26.0.90/build-arm $ (file-directory-p "/tmp/emacs1000")
t
~/abs/emacs-26.0.90/build-arm $ (file-directory-p "/tmp/emacs1000")
t
~/abs/emacs-26.0.90/build-arm $ (pp (file-attributes "/tmp/emacs1000"))
nil
~/abs/emacs-26.0.90/build-arm $
--8<---------------cut here---------------end--------------->8---

Message #38 received at 29070 <at> debbugs.gnu.org (full text, mbox):

From: Noam Postavsky <npostavs <at> users.sourceforge.net>
To: andrés ramírez <rrandresf <at> gmail.com>
Cc: 29070 <at> debbugs.gnu.org
Subject: Re: bug#29070: 26.0.90; emacs-26.0.90 pretest
Date: Mon, 30 Oct 2017 22:11:31 -0400

retitle 29070 26.0.90; (file-attributes dir) => nil, even though (and (file-exists-p dir) (file-directory-p dir)) => t
quit

andrés ramírez <rrandresf <at> gmail.com> writes:

> Yes. Consistently gave me 'nil'. I have evaluated more than 20 times

> ~/abs/emacs-26.0.90/build-arm $ (file-directory-p "/tmp/emacs1000")
> t
> ~/abs/emacs-26.0.90/build-arm $ (pp (file-attributes "/tmp/emacs1000"))
> nil

Okay, can you run under gdb, and step through Ffile_attributes to see
where it's going wrong?

Message #43 received at 29070 <at> debbugs.gnu.org (full text, mbox):

From: andrés ramírez <rrandresf <at> gmail.com>
To: Noam Postavsky <npostavs <at> users.sourceforge.net>
Cc: 29070 <at> debbugs.gnu.org
Subject: Re: bug#29070: 26.0.90; emacs-26.0.90 pretest
Date: Mon, 30 Oct 2017 20:32:22 -0600

Hi Noam.
> Okay, can you run under gdb, and step through Ffile_attributes to see
> where it's going wrong?
The task is not so easy. When starting emacs "Ffile_attributes" is
called multiple times. I just need to stop the breakpoint when
'Lisp_Object filename' = "/tmp/emacs1000". How coul I code that
condition inside the function?

In the meantime. I have tried the same source code (pretest) on another equal machine with
another distro (archlinux). The issue is not present on the archlinux
distro.

Message #46 received at 29070 <at> debbugs.gnu.org (full text, mbox):

From: Noam Postavsky <npostavs <at> users.sourceforge.net>
To: andrés ramírez <rrandresf <at> gmail.com>
Cc: 29070 <at> debbugs.gnu.org
Subject: Re: bug#29070: 26.0.90; emacs-26.0.90 pretest
Date: Mon, 30 Oct 2017 22:49:33 -0400

andrés ramírez <rrandresf <at> gmail.com> writes:

> Hi Noam.
>> Okay, can you run under gdb, and step through Ffile_attributes to see
>> where it's going wrong?
> The task is not so easy. When starting emacs "Ffile_attributes" is
> called multiple times. I just need to stop the breakpoint when
> 'Lisp_Object filename' = "/tmp/emacs1000". How coul I code that
> condition inside the function?

gdb --args ./emacs -Q
(gdb) run

Let Emacs startup, then hit C-z in the terminal which runs gdb.  This
will stop Emacs, and give you back a gdb prompt.

(gdb) break Ffile_attributes
(gdb) continue

Now that you have a breakpoint in Ffile_attributes, you can call it from
Emacs.

> In the meantime. I have tried the same source code (pretest) on another equal machine with
> another distro (archlinux). The issue is not present on the archlinux
> distro.

You mentioned other Emacs versions on the same machine.  Is it only
26.0.90 which shows this problem (and only on the one machine)?

Message #49 received at 29070 <at> debbugs.gnu.org (full text, mbox):

From: andrés ramírez <rrandresf <at> gmail.com>
To: Noam Postavsky <npostavs <at> users.sourceforge.net>
Cc: 29070 <at> debbugs.gnu.org
Subject: Re: bug#29070: 26.0.90; emacs-26.0.90 pretest
Date: Mon, 30 Oct 2017 21:05:28 -0600

Hi Noam.
> gdb --args ./emacs -Q
> (gdb) run

I have been able of debug it. The error seems to be inside this function. When doing M-x
server-start. Any other tip for debugging it?
--8<---------------cut here---------------start------------->8---
  return file_attributes (AT_FDCWD, SSDATA (encoded), Qnil, filename,
			  id_format);
--8<---------------cut here---------------end--------------->8---

Is it ok to pass this code?
--8<---------------cut here---------------start------------->8---
  if (err != 0)
    return unbind_to (count, Qnil);
--8<---------------cut here---------------end--------------->8---

> You mentioned other Emacs versions on the same machine.  Is it only
> 26.0.90 which shows this problem (and only on the one machine)?
Yes. You are Right 26.0.90 is the only one that exhibits this
problem. It is debian jessie.

Message #52 received at 29070 <at> debbugs.gnu.org (full text, mbox):

From: Noam Postavsky <npostavs <at> users.sourceforge.net>
To: andrés ramírez <rrandresf <at> gmail.com>
Cc: 29070 <at> debbugs.gnu.org
Subject: Re: bug#29070: 26.0.90; emacs-26.0.90 pretest
Date: Mon, 30 Oct 2017 23:21:58 -0400

andrés ramírez <rrandresf <at> gmail.com> writes:

> Hi Noam.
>> gdb --args ./emacs -Q
>> (gdb) run
>
> I have been able of debug it. The error seems to be inside this function. When doing M-x
> server-start. Any other tip for debugging it?
>
>   return file_attributes (AT_FDCWD, SSDATA (encoded), Qnil, filename,
> 			  id_format);
>
> Is it ok to pass this code?
>
>   if (err != 0)
>     return unbind_to (count, Qnil);

What do you mean by "to pass"?  Do you mean that err is not 0, so you
execute the return statement?  Or err is 0, so you go past it?

Since you are getting nil, I guess the you mean the first thing.  What
is 'err' at that point?  Is it the 'openat' or the 'fstat' call which
failed?

(gdb) p err

Message #55 received at 29070 <at> debbugs.gnu.org (full text, mbox):

From: andrés ramírez <rrandresf <at> gmail.com>
To: Noam Postavsky <npostavs <at> users.sourceforge.net>
Cc: 29070 <at> debbugs.gnu.org
Subject: Re: bug#29070: 26.0.90; emacs-26.0.90 pretest
Date: Mon, 30 Oct 2017 21:27:36 -0600

Hi Noam.
> 
> Since you are getting nil, I guess the you mean the first thing.  What
> is 'err' at that point?  Is it the 'openat' or the 'fstat' call which
> failed?
> 
> (gdb) p err

fstat
err= 9

Message #58 received at 29070 <at> debbugs.gnu.org (full text, mbox):

From: Noam Postavsky <npostavs <at> users.sourceforge.net>
To: andrés ramírez <rrandresf <at> gmail.com>
Cc: 29070 <at> debbugs.gnu.org
Subject: Re: bug#29070: 26.0.90; emacs-26.0.90 pretest
Date: Tue, 31 Oct 2017 06:30:54 -0400

andrés ramírez <rrandresf <at> gmail.com> writes:

>> (gdb) p err
>
> fstat
> err= 9

According to [1] this means "bad file descriptor".  But please step
through file_attributes and check which of 'fopenat' or 'fstat' produced
the error.

[1]: http://www.ioplex.com/~miallen/errcmp.html

Message #61 received at 29070 <at> debbugs.gnu.org (full text, mbox):

From: andrés ramírez <rrandresf <at> gmail.com>
To: Noam Postavsky <npostavs <at> users.sourceforge.net>
Cc: 29070 <at> debbugs.gnu.org
Subject: Re: bug#29070: 26.0.90; emacs-26.0.90 pretest
Date: Tue, 31 Oct 2017 06:12:57 -0600

Hi Noam. 
> > fstat
> > err= 9
> 
> According to [1] this means "bad file descriptor".  But please step
> through file_attributes and check which of 'fopenat' or 'fstat' produced
> the error.
> 
> [1]: http://www.ioplex.com/~miallen/errcmp.html

      if (fstat (namefd, &s) != 0)

Message #64 received at 29070 <at> debbugs.gnu.org (full text, mbox):

From: Andreas Schwab <schwab <at> linux-m68k.org>
To: andrés ramírez <rrandresf <at> gmail.com>
Cc: 29070 <at> debbugs.gnu.org, Noam Postavsky <npostavs <at> users.sourceforge.net>
Subject: Re: bug#29070: 26.0.90; emacs-26.0.90 pretest
Date: Tue, 31 Oct 2017 14:11:59 +0100

What is the kernel version you are running?

Andreas.

-- 
Andreas Schwab, schwab <at> linux-m68k.org
GPG Key fingerprint = 58CA 54C7 6D53 942B 1756  01D3 44D5 214B 8276 4ED5
"And now for something completely different."

Message #67 received at 29070 <at> debbugs.gnu.org (full text, mbox):

From: andrés ramírez <rrandresf <at> gmail.com>
To: Andreas Schwab <schwab <at> linux-m68k.org>
Cc: 29070 <at> debbugs.gnu.org, Noam Postavsky <npostavs <at> users.sourceforge.net>
Subject: Re: bug#29070: 26.0.90; emacs-26.0.90 pretest
Date: Tue, 31 Oct 2017 07:38:37 -0600

Hi Andreas.
> What is the kernel version you are running?
--8<---------------cut here---------------start------------->8---
Linux chulpaca 3.4.113-sun8i #18 SMP PREEMPT Thu Jun 15 02:16:06 CEST 2017 armv7l GNU/Linux
--8<---------------cut here---------------end--------------->8---

Btw.

I am sharing config.log. from 26.0.50
--8<---------------cut here---------------start------------->8---
https://transfer.sh/14mN4H/config.log
--8<---------------cut here---------------end--------------->8---

And also config.log from pretest
--8<---------------cut here---------------start------------->8---
https://transfer.sh/Oe48v/config.log
--8<---------------cut here---------------end--------------->8---

It seems something have changed on configure between 26.0.50 and pretest

AR

Message #70 received at 29070 <at> debbugs.gnu.org (full text, mbox):

From: Andreas Schwab <schwab <at> linux-m68k.org>
To: andrés ramírez <rrandresf <at> gmail.com>
Cc: 29070 <at> debbugs.gnu.org, Noam Postavsky <npostavs <at> users.sourceforge.net>
Subject: Re: bug#29070: 26.0.90; emacs-26.0.90 pretest
Date: Tue, 31 Oct 2017 15:27:32 +0100

On Okt 31 2017, andrés ramírez <rrandresf <at> gmail.com> wrote:

> Hi Andreas.
>> What is the kernel version you are running?
>
> Linux chulpaca 3.4.113-sun8i #18 SMP PREEMPT Thu Jun 15 02:16:06 CEST 2017 armv7l GNU/Linux

That kernel does not support fstat on the O_PATH fd.  Please try this
patch:

diff --git a/src/dired.c b/src/dired.c
index 28d1cffb44..f192cf5c49 100644
--- a/src/dired.c
+++ b/src/dired.c
@@ -953,7 +953,14 @@ file_attributes (int fd, char const *name,
     {
       record_unwind_protect_int (close_file_unwind, namefd);
       if (fstat (namefd, &s) != 0)
-	err = errno;
+	{
+	  err = errno;
+	  /* The Linux kernel only supports fstat on O_PATH file
+	     descriptors since version 3.6.  Handle this error like
+	     missing support for O_PATH.  */
+	  if (err == EBADF)
+	    err = EINVAL;
+	}
       else
 	{
 	  err = 0;


Andreas.

-- 
Andreas Schwab, schwab <at> linux-m68k.org
GPG Key fingerprint = 58CA 54C7 6D53 942B 1756  01D3 44D5 214B 8276 4ED5
"And now for something completely different."

Message #73 received at 29070 <at> debbugs.gnu.org (full text, mbox):

From: andrés ramírez <rrandresf <at> gmail.com>
To: Andreas Schwab <schwab <at> linux-m68k.org>
Cc: 29070 <at> debbugs.gnu.org, Noam Postavsky <npostavs <at> users.sourceforge.net>
Subject: Re: bug#29070: 26.0.90; emacs-26.0.90 pretest
Date: Tue, 31 Oct 2017 09:18:49 -0600

Hi Andreas.

> 
> That kernel does not support fstat on the O_PATH fd.  Please try this
> patch:

That patch did the trick. Thanks. I have an additional question.

I have another older machine:
--8<---------------cut here---------------start------------->8---
Linux Nokia-N900 2.6.28-omap1 #1 PREEMPT Sat Nov 28 18:02:37 CET 2015 armv7l GNU/Linux
--8<---------------cut here---------------end--------------->8---

I have not compiled there yet. This patch would fix compilation there also?

AR

Message #76 received at 29070 <at> debbugs.gnu.org (full text, mbox):

From: Andreas Schwab <schwab <at> linux-m68k.org>
To: andrés ramírez <rrandresf <at> gmail.com>
Cc: 29070 <at> debbugs.gnu.org, Noam Postavsky <npostavs <at> users.sourceforge.net>
Subject: Re: bug#29070: 26.0.90; emacs-26.0.90 pretest
Date: Tue, 31 Oct 2017 21:21:58 +0100

On Okt 31 2017, andrés ramírez <rrandresf <at> gmail.com> wrote:

> I have another older machine:
>
> Linux Nokia-N900 2.6.28-omap1 #1 PREEMPT Sat Nov 28 18:02:37 CET 2015 armv7l GNU/Linux
>
> I have not compiled there yet. This patch would fix compilation there also?

Which compilation problem?

Andreas.

-- 
Andreas Schwab, schwab <at> linux-m68k.org
GPG Key fingerprint = 58CA 54C7 6D53 942B 1756  01D3 44D5 214B 8276 4ED5
"And now for something completely different."

Message #79 received at 29070 <at> debbugs.gnu.org (full text, mbox):

From: andrés ramírez <rrandresf <at> gmail.com>
To: Andreas Schwab <schwab <at> linux-m68k.org>
Cc: 29070 <at> debbugs.gnu.org, Noam Postavsky <npostavs <at> users.sourceforge.net>
Subject: Re: bug#29070: 26.0.90; emacs-26.0.90 pretest
Date: Tue, 31 Oct 2017 19:00:29 -0600

Hi Andreas.
> 
> Which compilation problem?

No problem. It compiled fine. And worked as expected.

Thanks guys. 

Message #84 received at 29070-done <at> debbugs.gnu.org (full text, mbox):

From: Andreas Schwab <schwab <at> linux-m68k.org>
To: andrés ramírez <rrandresf <at> gmail.com>
Cc: 29070-done <at> debbugs.gnu.org, Noam Postavsky <npostavs <at> users.sourceforge.net>
Subject: Re: bug#29070: 26.0.90; emacs-26.0.90 pretest
Date: Wed, 01 Nov 2017 21:48:40 +0100

Thanks for testing.

Andreas.

-- 
Andreas Schwab, schwab <at> linux-m68k.org
GPG Key fingerprint = 58CA 54C7 6D53 942B 1756  01D3 44D5 214B 8276 4ED5
"And now for something completely different."

Message #87 received at 29070 <at> debbugs.gnu.org (full text, mbox):

From: Noam Postavsky <npostavs <at> users.sourceforge.net>
To: andrés ramírez <rrandresf <at> gmail.com>
Cc: Andreas Schwab <schwab <at> linux-m68k.org>, 29070 <at> debbugs.gnu.org
Subject: Re: bug#29070: 26.0.90; emacs-26.0.90 pretest
Date: Wed, 01 Nov 2017 19:47:15 -0400

andrés ramírez <rrandresf <at> gmail.com> writes:

> No problem. It compiled fine. And worked as expected.
>
> Thanks guys. 

In addition to Anreads' fix, I modified the error message for this case,
so we won't claim that the directory is a file for nil file-attributes.

For reference, the relevant commit are:

[1: 8453423c7c]: 2017-11-01 21:44:49 +0100
  Avoid wrong value from file-attributes on Linux kernel before 3.6
  https://git.savannah.gnu.org/cgit/emacs.git/commit/?id=8453423c7c5e1886a301fb61c4077650f59e670b

[2: dc0a25c2f9]: 2017-11-01 19:39:34 -0400
  Give a more sensible message if file-attributes fails (Bug#29070)
  https://git.savannah.gnu.org/cgit/emacs.git/commit/?id=dc0a25c2f9b44c697194bd0ec21c942125160544

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