23.0.60; epg: (file-error "Opening output file" integer-or-marker-p nil)

23.0.60; epg: (file-error "Opening output file" integer-or-marker-p nil)

[Eric Hanchrow]

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Please write in English if possible, because the Emacs maintainers
usually do not have translators to read other languages for them.

Your bug report will be posted to the emacs-pretest-bug@gnu.org mailing list.

Please describe exactly what actions triggered the bug
and the precise symptoms of the bug:

I visited a file that I keep encrypted with a symmetric passphrase using
PGP.  That worked fine: it prompted me for my password, and displayed it
properly.  Then I made some changes and typed C-x C-s; I saw

    Debugger entered--Lisp error: (file-error "Opening output file" integer-or-marker-p nil)
      signal(file-error ("Opening output file" integer-or-marker-p nil))
      byte-code("Ä\b	\"‰\x12ƒ
\0\nÅ¡ˆÆÇÈ\vAB\"‡" [file epa-file-passphrase-alist entry error assoc nil signal file-error "Opening output file"] 4)
      epa-file-write-region(nil nil "/home/erich/xxx.gpg" nil t)
      apply(epa-file-write-region (nil nil "/home/erich/xxx.gpg" nil t))
      epa-file-handler(write-region nil nil "/home/erich/xxx.gpg" nil t)
      write-region(nil nil "/home/erich/xxx.gpg" nil t "~/xxx.gpg")
      basic-save-buffer-2()
      basic-save-buffer-1()
      basic-save-buffer()
      save-buffer(1)
      call-interactively(save-buffer nil nil)

(Actually I've replaced the file's real name with "xxx.gpg")

If Emacs crashed, and you have the Emacs process in the gdb debugger,
please include the output from the following gdb commands:
    `bt full' and `xbacktrace'.
If you would like to further debug the crash, please read the file
/usr/local/src/emacs-via-git/etc/DEBUG for instructions.


In GNU Emacs 23.0.60.1 (i686-pc-linux-gnu, GTK+ Version 2.12.9)
 of 2008-05-29 on debian
configured using `configure  '--enable-maintainer-mode' '--with-xpm=no' '--with-jpeg=no' '--with-gif=no' '--with-tiff=no' '--with-xft' '--with-x-toolkit=gtk''

Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: nil
  value of $LC_CTYPE: nil
  value of $LC_MESSAGES: nil
  value of $LC_MONETARY: nil
  value of $LC_NUMERIC: nil
  value of $LC_TIME: nil
  value of $LANG: nil
  value of $XMODIFIERS: nil
  locale-coding-system: utf-8-unix
  default-enable-multibyte-characters: t

Major mode: ERC

Minor modes in effect:
  erc-ring-mode: t
  erc-pcomplete-mode: t
  erc-netsplit-mode: t
  erc-button-mode: t
  erc-fill-mode: t
  erc-stamp-mode: t
  flyspell-mode: t
  erc-autojoin-mode: t
  erc-track-mode: t
  erc-track-minor-mode: t
  erc-match-mode: t
  erc-log-mode: t
  erc-services-mode: t
  erc-networks-mode: t
  erc-irccontrols-mode: t
  erc-noncommands-mode: t
  erc-readonly-mode: t
  desktop-save-mode: t
  recentf-mode: t
  display-time-mode: t
  global-auto-revert-mode: t
  shell-dirtrack-mode: t
  iswitchb-mode: t
  mouse-wheel-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  global-auto-composition-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  line-number-mode: t
  transient-mark-mode: t
  abbrev-mode: t

Recent input:
RET C-s f s f . C-a C-x C-q C-o C-x C-o C-x C-s ESC 
x t o g g TAB d e TAB e TAB RET C-x C-s C-x h ESC w 
q ESC x ESC p RET ESC ~ C-x C-q C-x b RET C-x 2 C-x 
b s t a c k RET y C-y ESC C-p ESC C-p ESC < ESC C-d 
ESC C-u ESC C-@ ESC w C-x o C-y RET ESC x r e p o r 
t - e m TAB RET

Recent messages:
Debug on Error enabled globally
Entering debugger...
Mark set [2 times]
Back to top level.
Debug on Error disabled globally
Modification-flag cleared
File is under version-control; use C-x v v to check in/out
Reverting buffer `private'.
No buffer matching `stack', create one? (y or n) 
Mark set [4 times]

-- 
[T]he main reason Viaweb ended up being server-based was
that we didn't want to have to write Windows apps.
        -- Paul Graham

Re: 23.0.60; epg: (file-error "Opening output file" integer-or-marker-p nil)

[Daiki Ueno]

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>>>>> In <87y75oqx82.fsf@offby1.atm01.sea.blarg.net> 
>>>>>	Eric Hanchrow <offby1@blarg.net> wrote:

> I visited a file that I keep encrypted with a symmetric passphrase using
> PGP.  That worked fine: it prompted me for my password, and displayed it
> properly.  Then I made some changes and typed C-x C-s; I saw

>     Debugger entered--Lisp error: (file-error "Opening output file" integer-or-marker-p nil)
>       signal(file-error ("Opening output file" integer-or-marker-p nil))
>       epa-file-write-region(nil nil "/home/erich/xxx.gpg" nil t)
>       apply(epa-file-write-region (nil nil "/home/erich/xxx.gpg" nil t))
>       epa-file-handler(write-region nil nil "/home/erich/xxx.gpg" nil t)
>       write-region(nil nil "/home/erich/xxx.gpg" nil t "~/xxx.gpg")
>       basic-save-buffer-2()

Thanks for the report.  I've just installed the following patch which
should fix the problem.


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diff --git a/lisp/epa-file.el b/lisp/epa-file.el
index 25edba5..f621a53 100644
--- a/lisp/epa-file.el
+++ b/lisp/epa-file.el
@@ -182,6 +182,9 @@
 	       context
 	       (if (stringp start)
 		   (epa-file--encode-coding-string start coding-system)
+		 (unless start
+		   (setq start (point-min)
+			 end (point-max)))
 		 (epa-file--encode-coding-string (buffer-substring start end)
 						 coding-system))
 	       (if (or epa-file-select-keys

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Regards,
-- 
Daiki Ueno

Re: 23.0.60; epg: (file-error "Opening output file" integer-or-marker-p nil)

[Eric Hanchrow]

Thanks, that fixed it!

However, now every time I save, it asks for my password.  Is that
intentional?
-- 
Documentation exists, but never seems to be complete.
        -- Dennis Ritchie, 1972

Re: 23.0.60; epg: (file-error "Opening output file" integer-or-marker-p nil)

[Daiki Ueno]

>>>>> In <87tzgbreso.fsf@offby1.atm01.sea.blarg.net> 
>>>>>	Eric Hanchrow <offby1@blarg.net> wrote:
> However, now every time I save, it asks for my password.  Is that
> intentional?

If you are not using gpg-agent,
(setq epa-file-cache-passphrase-for-symmetric-encryption t)
might help.

Regards,
-- 
Daiki Ueno