GNU bug report logs - #29203
26.0.50; Binding a key to (MAP . CHAR) no longer works

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

From: Fox Kiester <foxkies <at> gmail.com>
To: bug-gnu-emacs <at> gnu.org
Subject: 26.0.50; Binding a key to (MAP . CHAR) no longer works
Date: Tue, 7 Nov 2017 21:54:32 -0500

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

According to the docstring of define-key, a cons of (MAP . CHAR) is a valid
key definition that will act as CHAR in MAP. This worked in previous
versions of Emacs but now causes an error when the keybinding is executed:
"Wrong type argument: commandp..."

Initial discussion took place here:
https://emacs.stackexchange.com/questions/36641/binding-a-key-to-map-char

[Message part 2 (text/html, inline)]

Message #8 received at 29203 <at> debbugs.gnu.org (full text, mbox):

From: Drew Adams <drew.adams <at> oracle.com>
To: Fox Kiester <foxkies <at> gmail.com>, 29203 <at> debbugs.gnu.org
Subject: RE: bug#29203: 26.0.50; Binding a key to (MAP . CHAR) no longer works
Date: Wed, 8 Nov 2017 06:59:47 -0800 (PST)

This is apparently a regression, introduced in Emacs 24.
The problem does not exist in Emacs 20 through Emacs 23.

Message #11 received at 29203 <at> debbugs.gnu.org (full text, mbox):

From: Stefan Kangas <stefan <at> marxist.se>
To: Fox Kiester <foxkies <at> gmail.com>
Cc: 29203 <at> debbugs.gnu.org, Drew Adams <drew.adams <at> oracle.com>
Subject: Re: bug#29203: 26.0.50; Binding a key to (MAP . CHAR) no longer works
Date: Mon, 11 Nov 2019 03:32:57 +0100

found 29203 27.0.50
thanks

Fox Kiester <foxkies <at> gmail.com> writes:

> According to the docstring of define-key, a cons of (MAP . CHAR) is
> a valid key definition that will act as CHAR in MAP. This worked in
> previous versions of Emacs but now causes an error when the
> keybinding is executed: "Wrong type argument: commandp..."
>
> Initial discussion took place here: https://emacs.stackexchange.com/questions/36641/binding-a-key-to-map-char

I can reproduce this using:

0. (define-key global-map (kbd "C-c ,") (cons help-map ?r))
1. C-c ,

Drew Adams <drew.adams <at> oracle.com> writes:

> This is apparently a regression, introduced in Emacs 24.
> The problem does not exist in Emacs 20 through Emacs 23.

So was the behaviour changed willingly?  That is, is this a bug in the
documentation or in the code?

Best regards,
Stefan Kangas

Message #16 received at 29203 <at> debbugs.gnu.org (full text, mbox):

From: Drew Adams <drew.adams <at> oracle.com>
To: Stefan Kangas <stefan <at> marxist.se>, Fox Kiester <foxkies <at> gmail.com>
Cc: 29203 <at> debbugs.gnu.org
Subject: RE: bug#29203: 26.0.50; Binding a key to (MAP . CHAR) no longer works
Date: Mon, 11 Nov 2019 03:51:17 +0000 (UTC)

> found 29203 27.0.50
> thanks
>  
> I can reproduce this using:
> 
> 0. (define-key global-map (kbd "C-c ,") (cons help-map ?r))
> 1. C-c ,
> 
> > This is apparently a regression, introduced in Emacs 24.
> > The problem does not exist in Emacs 20 through Emacs 23.
> 
> So was the behaviour changed willingly?  That is, is this a bug in the
> documentation or in the code?

Not sure whom you're asking (maybe anyone who knows?),
but IMO it's an (unannounced?) incompatible step
backward.  Stefan seems to have agreed that it's just
a code bug, in the cited emacs.SE comments.

Message #19 received at 29203 <at> debbugs.gnu.org (full text, mbox):

From: Stefan Kangas <stefan <at> marxist.se>
To: Drew Adams <drew.adams <at> oracle.com>
Cc: Fox Kiester <foxkies <at> gmail.com>, 29203 <at> debbugs.gnu.org
Subject: Re: bug#29203: 26.0.50; Binding a key to (MAP . CHAR) no longer works
Date: Mon, 11 Nov 2019 20:09:53 +0100

Drew Adams <drew.adams <at> oracle.com> writes:

> Not sure whom you're asking (maybe anyone who knows?),

Yes, anyone who knows.  Thanks for replying.

> but IMO it's an (unannounced?) incompatible step
> backward.  Stefan seems to have agreed that it's just
> a code bug, in the cited emacs.SE comments.

OK, unless anyone says something else, let's treat that as
authoritative.

Best regards,
Stefan Kangas

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