GNU bug report logs - #12992
24.2.90.1; `C-x 8 RET RET': `Wrong type argument: characterp, nil'

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

From: Simen Heggestøyl <simenheg <at> ifi.uio.no>
To: bug-gnu-emacs <at> gnu.org
Subject: 24.2.90.1; `C-x 8 RET RET': `Wrong type argument: characterp, nil'
Date: Sun, 25 Nov 2012 12:55:04 +0100

`C-x 8 RET RET' gives `Wrong type argument: characterp, nil' in Emacs
version 24.2.90.1, whereas in version 24.2.1 it produces the message
`Not a Unicode character'.


In GNU Emacs 24.2.90.1 (x86_64-unknown-linux-gnu, GTK+ Version 2.24.10)
 of 2012-11-25 on x201
Windowing system distributor `The X.Org Foundation', version 11.0.11204000
System Description:	Debian GNU/Linux unstable (sid)

Important settings:
  value of $LANG: en_US.UTF-8
  locale-coding-system: utf-8-unix
  default enable-multibyte-characters: t

Major mode: Lisp Interaction

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
  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:
C-x 8 <return> <return> M-x r e p o r t <return>

Recent messages:
For information about GNU Emacs and the GNU system, type C-h C-a.
call-interactively: Wrong type argument: characterp, nil

Load-path shadows:
None found.

Features:
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vc-hooks lisp-float-type mwheel x-win x-dnd tool-bar dnd fontset image
regexp-opt fringe tabulated-list newcomment lisp-mode register page
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multi-tty emacs)

Message #8 received at 12992 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Simen Heggestøyl <simenheg <at> ifi.uio.no>
Cc: 12992 <at> debbugs.gnu.org
Subject: Re: bug#12992: 24.2.90.1;
	`C-x 8 RET RET': `Wrong type argument: characterp, nil'
Date: Sun, 25 Nov 2012 18:11:10 +0200

> From: Simen Heggestøyl <simenheg <at> ifi.uio.no>
> Date: Sun, 25 Nov 2012 12:55:04 +0100
> 
> `C-x 8 RET RET' gives `Wrong type argument: characterp, nil' in Emacs
> version 24.2.90.1, whereas in version 24.2.1 it produces the message
> `Not a Unicode character'.

Neither of which is nice.

Message #11 received at 12992 <at> debbugs.gnu.org (full text, mbox):

From: Chong Yidong <cyd <at> gnu.org>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: 12992 <at> debbugs.gnu.org,
	Simen Heggestøyl <simenheg <at> ifi.uio.no>
Subject: Re: bug#12992: 24.2.90.1;
	`C-x 8 RET RET': `Wrong type argument: characterp, nil'
Date: Sat, 08 Dec 2012 09:37:56 +0800

Eli Zaretskii <eliz <at> gnu.org> writes:

>> `C-x 8 RET RET' gives `Wrong type argument: characterp, nil' in Emacs
>> version 24.2.90.1, whereas in version 24.2.1 it produces the message
>> `Not a Unicode character'.
>
> Neither of which is nice.

How about simply changing the message to "You didn't specify a
character", similar to C-h f RET?

We could do a "require-match" type read, but those are best used
sparingly (since they can be annoying).

Message #14 received at 12992 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Chong Yidong <cyd <at> gnu.org>
Cc: 12992 <at> debbugs.gnu.org, simenheg <at> ifi.uio.no
Subject: Re: bug#12992: 24.2.90.1;
	`C-x 8 RET RET': `Wrong type argument: characterp, nil'
Date: Sat, 08 Dec 2012 10:23:09 +0200

> From: Chong Yidong <cyd <at> gnu.org>
> Cc: Simen Heggestøyl <simenheg <at> ifi.uio.no>,
>   12992 <at> debbugs.gnu.org
> Date: Sat, 08 Dec 2012 09:37:56 +0800
> 
> Eli Zaretskii <eliz <at> gnu.org> writes:
> 
> >> `C-x 8 RET RET' gives `Wrong type argument: characterp, nil' in Emacs
> >> version 24.2.90.1, whereas in version 24.2.1 it produces the message
> >> `Not a Unicode character'.
> >
> > Neither of which is nice.
> 
> How about simply changing the message to "You didn't specify a
> character", similar to C-h f RET?

Or "No character specified".  Yes, that's much better, IMO.

Message #19 received at 12992-done <at> debbugs.gnu.org (full text, mbox):

From: Chong Yidong <cyd <at> gnu.org>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: 12992-done <at> debbugs.gnu.org, simenheg <at> ifi.uio.no
Subject: Re: bug#12992: 24.2.90.1;
	`C-x 8 RET RET': `Wrong type argument: characterp, nil'
Date: Sat, 08 Dec 2012 19:05:37 +0800

Eli Zaretskii <eliz <at> gnu.org> writes:

>> How about simply changing the message to "You didn't specify a
>> character", similar to C-h f RET?
>
> Or "No character specified".  Yes, that's much better, IMO.

Fixed in trunk.

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