GNU bug report logs - #13015
24.2; (let (message-log-max) (message ...)) does not disable logging

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

From: Philipp Moeller <philipp.moeller <at> geometryfactory.com>
To: bug-gnu-emacs <at> gnu.org
Subject: 24.2; (let (message-log-max) (message ...)) does not disable logging
Date: Tue, 27 Nov 2012 23:20:49 +0100

The manual uses the example

  (let (message-log-max) (message ...))

to show how to disable logging messages in the *Messages* buffer. This
does not work in Emacs 24.1, e.g. evaluating:

  (let (message-log-max) (message "foobar"))

will still print "foobar" in *Messages* buffer.

When I use 

  (setq message-log-max nil)
  (message "foobar")

it works as expected: no output is send to the *Messages* buffer.

In GNU Emacs 24.2.1 (x86_64-unknown-linux-gnu, GTK+ Version 3.6.2)
 of 2012-11-18 on eric
Windowing system distributor `The X.Org Foundation', version 11.0.11300000
Configured using:
 `configure '--prefix=/usr' '--sysconfdir=/etc' '--libexecdir=/usr/lib'
 '--localstatedir=/var' '--with-x-toolkit=gtk3' '--with-xft'
 'CFLAGS=-march=x86-64 -mtune=generic -O2 -pipe -fstack-protector
 --param=ssp-buffer-size=4 -D_FORTIFY_SOURCE=2'
 'LDFLAGS=-Wl,-O1,--sort-common,--as-needed,-z,relro''

Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: nil
  value of $LC_CTYPE: nil
  value of $LC_MESSAGES: C
  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

Message #8 received at 13015 <at> debbugs.gnu.org (full text, mbox):

From: Glenn Morris <rgm <at> gnu.org>
To: Philipp Moeller <philipp.moeller <at> geometryfactory.com>
Cc: 13015 <at> debbugs.gnu.org
Subject: Re: bug#13015: 24.2;
	(let (message-log-max) (message ...)) does not disable logging
Date: Tue, 27 Nov 2012 17:37:45 -0500

Philipp Moeller wrote:

> does not work in Emacs 24.1, e.g. evaluating:
>
>   (let (message-log-max) (message "foobar"))
>
> will still print "foobar" in *Messages* buffer.

I suspect you are being confused by the fact that message returns what
it printed. Try:

 (let (message-log-max) (message "foobar") nil)

Message #11 received at 13015 <at> debbugs.gnu.org (full text, mbox):

From: Philipp Moeller <philipp.moeller <at> geometryfactory.com>
To: Glenn Morris <rgm <at> gnu.org>
Cc: 13015 <at> debbugs.gnu.org
Subject: Re: bug#13015: 24.2;
	(let (message-log-max) (message ...)) does not disable logging
Date: Tue, 27 Nov 2012 23:57:35 +0100

Glenn Morris <rgm <at> gnu.org> writes:

> Philipp Moeller wrote:
>
>> does not work in Emacs 24.1, e.g. evaluating:
>>
>>   (let (message-log-max) (message "foobar"))
>>
>> will still print "foobar" in *Messages* buffer.
>
> I suspect you are being confused by the fact that message returns what
> it printed. Try:
>
>  (let (message-log-max) (message "foobar") nil)

Absolutely correct. Sorry for the noise.

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