GNU bug report logs - #14486
24.3.50; A very subtle/obscure bug - with-temp-buffer + pop-to-buffer + insert

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Package: emacs;

Reported by: Jambunathan K <kjambunathan <at> gmail.com>

Date: Tue, 28 May 2013 02:49:02 UTC

Severity: normal

Tags: notabug

Found in version 24.3.50

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

Bug is archived. No further changes may be made.

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Message #8 received at 14486 <at> debbugs.gnu.org (full text, mbox):

From: Stefan Monnier <monnier <at> iro.umontreal.ca>
To: Jambunathan K <kjambunathan <at> gmail.com>
Cc: 14486 <at> debbugs.gnu.org
Subject: Re: bug#14486: 24.3.50;
	A very subtle/obscure bug - with-temp-buffer + pop-to-buffer + insert
Date: Tue, 28 May 2013 00:53:18 -0400

>       (defvar count 1)
>       (defun testing ()
>         (interactive)
>         (forward-line 1)
>         (insert (with-temp-buffer
>                   (insert (format "string-%d\n" (setq count (+ 1 count))))
>                   (pop-to-buffer (current-buffer))
>                   (buffer-string))))

When the outer `insert' is executed, the selected window is not the one
displaying *scratch* but the one displaying *Messages*, so the window's
point is not affected by `insert'.

You're just seeing the effect of the fact that each buffer has N+1
different `point's, where N is the number of windows displaying this buffer.


        Stefan
This bug report was last modified 11 years and 349 days ago.

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