GNU bug report logs - #26061
26.0.50; cancel-change-group fails with "unrelated state" error if used after an undo

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Package: emacs;

Reported by: Andreas Politz <politza <at> hochschule-trier.de>

Date: Sat, 11 Mar 2017 18:02:01 UTC

Severity: normal

Merged with 26287, 34405

Found in versions 26.0.50, 26.1

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

Bug is archived. No further changes may be made.

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From: Braun Gábor <braungb88 <at> gmail.com>
To: Lars Ingebrigtsen <larsi <at> gnus.org>
Cc: 34405 <at> debbugs.gnu.org, 26061 <at> debbugs.gnu.org
Subject: bug#26061: 26.0.50; cancel-change-group fails with "unrelated state" error if used after an undo
Date: Mon, 16 Aug 2021 14:01:01 +0200

> I can reproduce this problem in Emacs 26.1, but it seems to be gone in
> Emacs 27.1 (and 28), so I'm going to go ahead and guess that this has
> been fixed

I can see the fix in the following snippet of `cancel-change-group' in 
Emacs 27.1 code.  The faulty logic with `last-command' and `undo-start' 
has been gone.  (... denotes omitted code.)

    (let (...
	      ;; Use `pending-undo-list' temporarily since `undo-more' needs
	      ;; it, but restore it afterwards so as not to mess with an
	      ;; ongoing sequence of `undo's.
	      (pending-undo-list
	       ;; Use `buffer-undo-list' unconditionally (bug#39680).
	       buffer-undo-list))

Thank you for checking in recent Emacs versions.

Best wishes,

	Gábor
This bug report was last modified 3 years and 280 days ago.

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