GNU bug report logs - #46722
test-map-into fails

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Package: emacs;

Reported by: Glenn Morris <rgm <at> gnu.org>

Date: Tue, 23 Feb 2021 16:23:01 UTC

Severity: normal

Merged with 53365

Found in versions 27.2, 28.0.50, 29.0.50

Fixed in version 29.1

Done: Lars Ingebrigtsen <larsi <at> gnus.org>

Bug is archived. No further changes may be made.

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From: Eli Zaretskii <eliz <at> gnu.org>
To: Stefan Monnier <monnier <at> iro.umontreal.ca>
Cc: rgm <at> gnu.org, stefan <at> marxist.se, contovob <at> tcd.ie, dick.r.chiang <at> gmail.com, 46722 <at> debbugs.gnu.org, larsi <at> gnus.org
Subject: bug#46722: test-map-into fails
Date: Wed, 05 Jan 2022 20:07:50 +0200

> Cc: contovob <at> tcd.ie, Glenn Morris <rgm <at> gnu.org>,
>  Lars Ingebrigtsen <larsi <at> gnus.org>, Stefan Kangas <stefan <at> marxist.se>,
>  46722 <at> debbugs.gnu.org
> Date: Wed, 05 Jan 2022 12:51:09 -0500
> From:  Stefan Monnier via "Bug reports for GNU Emacs,
>  the Swiss army knife of text editors" <bug-gnu-emacs <at> gnu.org>
> 
> I think I tracked it down.
> 
> The patch below should fix it.  Boy do I hate side effects!
> Could others confirm that it fixes the problem for them as well?
> 
> Eli, do you think this is appropriate for `emacs-28`?
> OT1H this bug probably has been with us since Emacs-25, but OTOH the
> patch should be very safe.

Is it? how so?  copy-sequence is not a trivial operation, at least not
with arbitrary data structures.  And we nowadays use generics a lot,
so this could potentially affect gobs of code.  So I'd rather we
didn't install this on the release branch.
This bug report was last modified 3 years and 123 days ago.

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