GNU bug report logs - #13122
transpose-subr defeats save-excursion

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Package: emacs;

Reported by: Jyothis V <jyothisv <at> gmail.com>

Date: Sat, 8 Dec 2012 07:16:01 UTC

Severity: minor

Done: Chong Yidong <cyd <at> gnu.org>

Bug is archived. No further changes may be made.

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Message #30 received at 13122 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Tino Calancha <tino.calancha <at> gmail.com>
Cc: 13122 <at> debbugs.gnu.org
Subject: Re: bug#13122: save-excursion not saving point
Date: Sat, 27 Apr 2019 09:57:24 +0300

> From: Tino Calancha <tino.calancha <at> gmail.com>
> Date: Sat, 27 Apr 2019 04:53:56 +0900
> 
> ;; Following expression should eval as non-nil
> (let ((pos 3))
>   (with-temp-buffer
>     (insert "abcdef")
>     (goto-char pos)
>     (save-excursion (transpose-chars 2))
>     (= pos (point))))
> => nil

Why did you think it should evaluate to non-nil?  The ELisp manual has
a warning near the end of description of save-excursion; I think it's
relevant to this use case.
This bug report was last modified 6 years and 23 days ago.

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