GNU bug report logs - #11397
24.1.50; permanent-local after-change-functions + read-passwd == unusable minibuffer

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Steve Yegge <stevey <at> google.com>
Subject: bug#11397: closed (Re: bug#11397: 24.1.50; permanent-local
 after-change-functions + read-passwd == unusable minibuffer)
Date: Thu, 10 May 2012 18:29:03 +0000

[Message part 1 (text/plain, inline)]

Your bug report

#11397: 24.1.50; permanent-local after-change-functions + read-passwd == unusable minibuffer

which was filed against the emacs package, has been closed.

The explanation is attached below, along with your original report.
If you require more details, please reply to 11397 <at> debbugs.gnu.org.

-- 
11397: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=11397
GNU Bug Tracking System
Contact help-debbugs <at> gnu.org with problems

[Message part 2 (message/rfc822, inline)]

From: Glenn Morris <rgm <at> gnu.org>
To: 11397-done <at> debbugs.gnu.org
Subject: Re: bug#11397: 24.1.50;
	permanent-local after-change-functions + read-passwd == unusable
	minibuffer
Date: Thu, 10 May 2012 14:28:35 -0400

Stefan Monnier wrote:

> I believe I've just installed a fix for it a couple hours ago.

[Message part 3 (message/rfc822, inline)]

From: Steve Yegge <stevey <at> google.com>
To: bug-gnu-emacs <at> gnu.org
Subject: 24.1.50;
	permanent-local after-change-functions + read-passwd == unusable
	minibuffer
Date: Wed, 02 May 2012 14:21:36 -0700

Place the following code in a file, e.g. /tmp/hork-emacs.el:

;; begin code to place in file:
(defun my-after-change-function (&rest ignored)
  "Sample no-op after-change function.")

(put 'my-after-change-function 'permanent-local-hook t)

(defun hork-my-minibuffer ()
  (interactive)
  (add-hook 'after-change-functions 'my-after-change-function)
  (read-passwd "Enter some text: ")
  (message "Your minibuffer should now be horked"))
;; end code to place in file

Run emacs -q -l /tmp/hork-emacs.el
Execute M-x hork-my-minibuffer RET <any text> RET

Afterwards, all minibuffer input will be rendered as '.'
characters, as if it were still reading a password.

This does not happen in Emacs 23.

Also note that the bug does not manifest if you simply
evaluate the code above.  It must be loaded from a file,
at least as far as I can tell (though I do not know why.)

One possible fix might be to have `read-passwd' remove
its lambda from `after-change-functions' in the unwind forms.



In GNU Emacs 24.1.50.2 (x86_64-unknown-linux-gnu, GTK+ Version 2.20.1)
 of 2012-04-16 on stevey.kir.corp.google.com
Windowing system distributor `The X.Org Foundation', version 11.0.60900000
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: en_US.UTF-8
  value of $XMODIFIERS: nil
  locale-coding-system: utf-8-unix
  default enable-multibyte-characters: t

Major mode: Fundamental

Minor modes in effect:
  tooltip-mode: t
  mouse-wheel-mode: t
  tool-bar-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-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 input:
<help-echo> <help-echo> <help-echo> <help-echo> <help-echo> 
<help-echo> <help-echo> <help-echo> <help-echo> M-x 
r e p o r t - e m <tab> <return>

Recent messages:
For information about GNU Emacs and the GNU system, type C-h C-a.

Load-path shadows:
None found.

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