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From: Drew Adams <drew.adams@oracle.com>
To: Nicolas Richard <theonewiththeevillook@yahoo.fr>,
	Leo Liu <sdl.web@gmail.com>
Cc: 17109@debbugs.gnu.org
Subject: bug#17109: 24.4.50; REGRESSION: `with-output-to-temp-buffer' is broken
Date: Fri, 28 Mar 2014 14:45:35 -0700 (PDT)	[thread overview]
Message-ID: <d19bdae0-cca1-4da3-a640-7fb790ed71aa@default> (raw)
In-Reply-To: <b4dceacc-6dca-42ce-a29f-28fd8902d74e@default>

> 5. What you must NOT do is change the behavior of the existing macro,
> so that any code that uses it breaks.

I *really* hope that someone please takes this regression seriously.

I have lots of code that defines help functions of different kinds,
and it all uses `with-output-to-temp-buffer'.  And it all needs to
work across multiple Emacs versions.

For example, Bookmark+ has a command `bmkp-describe-bookmark'.
It does various things, but the first thing it does is this:

(with-output-to-temp-buffer "*Help*" (princ help-text))

That's a standard Emacs idiom, and has been so for decades.

Now it is broken.  Buffer *Help* ends up in Fundamental mode.
This should not be so.

I do not understand why anyone would change the behavior of
a macro such as `with-output-to-temp-buffer'.  There are plenty
of other ways to get whatever new behavior you want, without
doing that.





  reply	other threads:[~2014-03-28 21:45 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-03-26 20:08 bug#17109: 24.4.50; REGRESSION: `with-output-to-temp-buffer' is broken Drew Adams
2014-03-27  0:05 ` Leo Liu
2014-03-27  1:52   ` Drew Adams
2014-03-27  9:55   ` Nicolas Richard
2014-03-27 15:09     ` Drew Adams
2014-03-28 21:45       ` Drew Adams [this message]
2014-03-29  0:58         ` Leo Liu
2014-03-29  1:39           ` Drew Adams

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