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[debbugs-tracker] bug#23671: closed (25.0.94; recover-this-file error)

From: GNU bug Tracking System
Subject: [debbugs-tracker] bug#23671: closed (25.0.94; recover-this-file error)
Date: Wed, 01 Mar 2017 23:32:02 +0000

Your message dated Wed, 01 Mar 2017 18:31:14 -0500
with message-id <address@hidden>
and subject line Re: bug#23671: 25.0.94; recover-this-file error
has caused the debbugs.gnu.org bug report #23671,
regarding 25.0.94; recover-this-file error
to be marked as done.

(If you believe you have received this mail in error, please contact

23671: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=23671
GNU Bug Tracking System
Contact address@hidden with problems
--- Begin Message --- Subject: 25.0.94; recover-this-file error Date: Wed, 01 Jun 2016 07:30:02 -0400

        I got a minor error when invoking `recover-this-file'.

        I saw a message from Emacs that I could recover a file.
        I switched to another buffer to check out something but
        didn't switch back when I invoked `recover-this-file' and
        got the error:

             Wrong type argument: stringp, nil

        Admittedly, this is minor and was my error in doing this but
        I think that Emacs should give a more informative error

        Thanks for your consideration.

In GNU Emacs (x86_64-redhat-linux-gnu, GTK+ Version 3.18.9)
 of 2016-05-18 built on copr-builder-587584625.novalocal
Windowing system distributor 'Fedora Project', version 11.0.11799901
Configured using:
 'configure --build=x86_64-redhat-linux-gnu
 --host=x86_64-redhat-linux-gnu --program-prefix=
 --disable-dependency-tracking --prefix=/usr --exec-prefix=/usr
 --bindir=/usr/bin --sbindir=/usr/sbin --sysconfdir=/etc
 --datadir=/usr/share --includedir=/usr/include --libdir=/usr/lib64
 --libexecdir=/usr/libexec --localstatedir=/var
 --sharedstatedir=/var/lib --mandir=/usr/share/man
 --infodir=/usr/share/info --with-dbus --with-gif --with-jpeg --with-png
 --with-rsvg --with-tiff --with-xft --with-xpm --with-x-toolkit=gtk3
 --with-gpm=no --with-xwidgets build_alias=x86_64-redhat-linux-gnu
 host_alias=x86_64-redhat-linux-gnu 'CFLAGS=-DMAIL_USE_LOCKF -O2 -g
 -pipe -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2
 -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4
 -grecord-gcc-switches -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1
 -m64 -mtune=generic' LDFLAGS=-Wl,-z,relro

Configured features:

Important settings:
  value of $LANG: en_US.UTF-8
  value of $XMODIFIERS: @im=ibus
  locale-coding-system: utf-8-unix

Major mode: Lisp Interaction

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
  line-number-mode: t
  transient-mark-mode: t

Recent messages:
354 End data with <CR><LF>.<CR><LF>
Sending email 
Sending email done
250 2.0.0 Ok: queued as F270E38000086
221 2.0.0 Bye
previous-line: Beginning of buffer [21 times]
scroll-up-command: End of buffer
recover-file: Wrong type argument: stringp, nil
Making completion list...

Load-path shadows:
None found.

(shadow emacsbug pp mailalias smtpmail sendmail thingatpt eieio-opt
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gnus-cite smiley ansi-color shr dom subr-x browse-url mail-extr
gnus-async gnus-bcklg qp gnus-ml disp-table cursor-sensor nndraft nnmh
nndoc mm-archive timezone url-http url-gw url-cache url-auth
url-handlers utf-7 rfc2104 nnfolder network-stream nsm starttls
gnus-agent gnus-srvr gnus-score score-mode nnvirtual gnus-msg nntp
gnus-cache epa-file epa derived nnreddit mm-url url url-proxy
url-privacy url-expand url-methods url-history url-cookie url-domsuf
url-util url-parse auth-source cl-seq eieio eieio-core cl-macs url-vars
json map seq byte-opt bytecomp byte-compile cl-extra cconv gnus-art
mm-uu mml2015 mm-view mml-smime smime dig mailcap cl gv sieve sieve-mode
sieve-manage nnir gnus-sum gnus-group gnus-undo gnus-start gnus-cloud
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password-cache epg epg-config mm-decode mm-bodies mm-encode mail-parse
rfc2231 rfc2047 rfc2045 ietf-drums mailabbrev gmm-utils mailheader
gnus-win gnus gnus-ems wid-edit nnoo nnheader gnus-util mm-util help-fns
help-mode easymenu cl-loaddefs pcase cl-lib mail-prsvr mail-utils
time-date mule-util tooltip eldoc electric uniquify ediff-hook vc-hooks
lisp-float-type mwheel x-win term/common-win x-dnd tool-bar dnd fontset
image regexp-opt fringe tabulated-list newcomment elisp-mode lisp-mode
prog-mode register page menu-bar rfn-eshadow timer select scroll-bar
mouse jit-lock font-lock syntax facemenu font-core 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 charscript case-table epa-hook
jka-cmpr-hook help simple abbrev 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 dynamic-setting
system-font-setting font-render-setting xwidget-internal move-toolbar
gtk x-toolkit x multi-tty make-network-process emacs)

Memory information:
((conses 16 210476 43680)
 (symbols 48 32047 156)
 (miscs 40 104 420)
 (strings 32 51121 15839)
 (string-bytes 1 1652872)
 (vectors 16 25936)
 (vector-slots 8 615975 18073)
 (floats 8 574 1030)
 (intervals 56 1113 80)
 (buffers 976 39)
 (heap 1024 49536 29765))

--- End Message ---
--- Begin Message --- Subject: Re: bug#23671: 25.0.94; recover-this-file error Date: Wed, 01 Mar 2017 18:31:14 -0500 User-agent: Gnus (www.gnus.org), GNU Emacs (www.gnu.org/software/emacs/)
Version: 26.1

Live System User wrote:

> I saw a message from Emacs that I could recover a file. I switched to
> another buffer to check out something but didn't switch back when I
> invoked `recover-this-file' and got the error:
>              Wrong type argument: stringp, nil

commit 8244357
Date:   Wed Mar 1 18:29:48 2017 -0500

    Small recover-this-file improvement
    * lisp/files.el (recover-this-file): Explicit error if not
    visiting a file.  (Bug#23671)

diff --git a/lisp/files.el b/lisp/files.el
index 7c9271e..c7de445 100644
--- a/lisp/files.el
+++ b/lisp/files.el
@@ -5838,6 +5838,8 @@ an auto-save file."
 (defun recover-this-file ()
   "Recover the visited file--get contents from its last auto-save file."
+  (or buffer-file-name
+      (user-error "This buffer is not visiting a file"))
   (recover-file buffer-file-name))
 (defun recover-file (file)

--- End Message ---

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