GNU bug report logs - #17214
24.3.50; C-q F1 does not display help, inserts null

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

From: Eli Zaretskii <eliz <at> gnu.org>
To: bug-gnu-emacs <at> gnu.org
Subject: 24.3.50; C-q F1 does not display help, inserts null
Date: Mon, 07 Apr 2014 05:47:06 +0300

Steps to reproduce:

  emacs -Q
  C-q F1

This momentarily flashes the help text, and inserts a null character.
The expected result is that the help text is displayed, and Emacs
waits for another keystroke and inserts that.


In GNU Emacs 24.3.50.26 (i686-pc-mingw32)
 of 2014-04-06 on HOME-C4E4A596F7
Repository revision: 116914 monnier <at> iro.umontreal.ca-20140406130800-4fr2v94ybc5gszkb
Windowing system distributor `Microsoft Corp.', version 5.1.2600
Configured using:
 `configure --prefix=/d/usr --enable-checking=yes,glyphs 'CFLAGS=-O0
 -gdwarf-2 -g3''

Important settings:
  value of $LANG: ENU
  locale-coding-system: cp1255

Major mode: Lisp Interaction

Minor modes in effect:
  tooltip-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 input:
M-x r e p o r t - C-g C-q <f1> <return> M-x r e p o 
r t - e n <tab> <backspace> <tab> <return>

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

Load-path shadows:
None found.

Features:
(shadow sort gnus-util mail-extr emacsbug message format-spec rfc822 mml
mml-sec mm-decode mm-bodies mm-encode mail-parse rfc2231 mailabbrev
gmm-utils mailheader sendmail rfc2047 rfc2045 ietf-drums mm-util
help-fns mail-prsvr mail-utils help-mode easymenu time-date tooltip
electric uniquify ediff-hook vc-hooks lisp-float-type mwheel dos-w32
ls-lisp w32-common-fns disp-table w32-win w32-vars tool-bar dnd fontset
image regexp-opt fringe tabulated-list newcomment lisp-mode prog-mode
register page menu-bar rfn-eshadow timer select scroll-bar mouse
jit-lock font-lock syntax facemenu font-core frame cham georgian
utf-8-lang misc-lang vietnamese tibetan thai tai-viet lao korean
japanese hebrew greek romanian slovak czech european ethiopic indian
cyrillic chinese case-table epa-hook jka-cmpr-hook help simple abbrev
minibuffer 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 make-network-process
w32notify w32 multi-tty emacs)

Memory information:
((conses 8 75080 5898)
 (symbols 32 17563 0)
 (miscs 32 34 97)
 (strings 16 10984 3506)
 (string-bytes 1 274804)
 (vectors 8 9528)
 (vector-slots 4 373747 2332)
 (floats 8 58 264)
 (intervals 28 242 94)
 (buffers 508 12))

Message #8 received at 17214 <at> debbugs.gnu.org (full text, mbox):

From: Marcin Borkowski <mbork <at> mbork.pl>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: 17214 <at> debbugs.gnu.org
Subject: Re: bug#17214: 24.3.50; C-q F1 does not display help, inserts null
Date: Mon, 08 Feb 2016 15:38:24 +0100

Hi,

I tried to investigate this, and it seems that read-quoted-char has some
facilities for intercepting f1 (i.e., all the help- local variables),
and then does not use them at all.

Strange.

Best,
Marcin


On 2014-04-07, at 06:47, Eli Zaretskii <eliz <at> gnu.org> wrote:

> Steps to reproduce:
>
>   emacs -Q
>   C-q F1
>
> This momentarily flashes the help text, and inserts a null character.
> The expected result is that the help text is displayed, and Emacs
> waits for another keystroke and inserts that.
>
>
> In GNU Emacs 24.3.50.26 (i686-pc-mingw32)
>  of 2014-04-06 on HOME-C4E4A596F7
> Repository revision: 116914 monnier <at> iro.umontreal.ca-20140406130800-4fr2v94ybc5gszkb
> Windowing system distributor `Microsoft Corp.', version 5.1.2600
> Configured using:
>  `configure --prefix=/d/usr --enable-checking=yes,glyphs 'CFLAGS=-O0
>  -gdwarf-2 -g3''
>
> Important settings:
>   value of $LANG: ENU
>   locale-coding-system: cp1255
>
> Major mode: Lisp Interaction
>
> Minor modes in effect:
>   tooltip-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 input:
> M-x r e p o r t - C-g C-q <f1> <return> M-x r e p o 
> r t - e n <tab> <backspace> <tab> <return>
>
> Recent messages:
> For information about GNU Emacs and the GNU system, type C-h C-a.
> Quit
>
> Load-path shadows:
> None found.
>
> Features:
> (shadow sort gnus-util mail-extr emacsbug message format-spec rfc822 mml
> mml-sec mm-decode mm-bodies mm-encode mail-parse rfc2231 mailabbrev
> gmm-utils mailheader sendmail rfc2047 rfc2045 ietf-drums mm-util
> help-fns mail-prsvr mail-utils help-mode easymenu time-date tooltip
> electric uniquify ediff-hook vc-hooks lisp-float-type mwheel dos-w32
> ls-lisp w32-common-fns disp-table w32-win w32-vars tool-bar dnd fontset
> image regexp-opt fringe tabulated-list newcomment lisp-mode prog-mode
> register page menu-bar rfn-eshadow timer select scroll-bar mouse
> jit-lock font-lock syntax facemenu font-core frame cham georgian
> utf-8-lang misc-lang vietnamese tibetan thai tai-viet lao korean
> japanese hebrew greek romanian slovak czech european ethiopic indian
> cyrillic chinese case-table epa-hook jka-cmpr-hook help simple abbrev
> minibuffer 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 make-network-process
> w32notify w32 multi-tty emacs)
>
> Memory information:
> ((conses 8 75080 5898)
>  (symbols 32 17563 0)
>  (miscs 32 34 97)
>  (strings 16 10984 3506)
>  (string-bytes 1 274804)
>  (vectors 8 9528)
>  (vector-slots 4 373747 2332)
>  (floats 8 58 264)
>  (intervals 28 242 94)
>  (buffers 508 12))

Message #11 received at 17214 <at> debbugs.gnu.org (full text, mbox):

From: npostavs <at> users.sourceforge.net
To: Marcin Borkowski <mbork <at> mbork.pl>
Cc: Eli Zaretskii <eliz <at> gnu.org>, 17214 <at> debbugs.gnu.org
Subject: Re: bug#17214: 24.3.50; C-q F1 does not display help, inserts null
Date: Sun, 16 Jul 2017 08:26:11 -0400

found 17214 25.1
tags 17214 fixed
close 17214 25.2
quit

Marcin Borkowski <mbork <at> mbork.pl> writes:

> Hi,
>
> I tried to investigate this, and it seems that read-quoted-char has some
> facilities for intercepting f1 (i.e., all the help- local variables),
> and then does not use them at all.
>
> Strange.
>
> Best,
> Marcin
>
>
> On 2014-04-07, at 06:47, Eli Zaretskii <eliz <at> gnu.org> wrote:
>
>> Steps to reproduce:
>>
>>   emacs -Q
>>   C-q F1
>>
>> This momentarily flashes the help text, and inserts a null character.
>> The expected result is that the help text is displayed, and Emacs
>> waits for another keystroke and inserts that.

This seems to have been fixed in 25.2.

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