GNU bug report logs - #530
Emacs 22 occasionally loses undo buffer?

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Package: emacs;

Reported by: "Casey Muratori" <casey <at> mollyrocket.com>

Date: Thu, 3 Jul 2008 23:20:03 UTC

Severity: wishlist

Tags: patch, wontfix

Merged with 1501

Done: Stefan Kangas <stefan <at> marxist.se>

Bug is archived. No further changes may be made.

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Report forwarded to bug-submit-list <at> lists.donarmstrong.com, Emacs Bugs <bug-gnu-emacs <at> gnu.org>:
bug#530; Package emacs. Full text and rfc822 format available.
Acknowledgement sent to "Casey Muratori" <casey <at> mollyrocket.com>:
New bug report received and forwarded. Copy sent to Emacs Bugs <bug-gnu-emacs <at> gnu.org>. Full text and rfc822 format available.

Message #5 received at submit <at> emacsbugs.donarmstrong.com (full text, mbox):

From: "Casey Muratori" <casey <at> mollyrocket.com>
To: bug-gnu-emacs <at> gnu.org
Subject: Emacs 22 occasionally loses undo buffer?
Date: Thu, 3 Jul 2008 16:14:29 -0700

I'm a long-time GNU Emacs user, and recently I updated to 22.x.

In 21.x, I never had any problems with undo, but in both 22.1 and 22.2
I will get an occasional loss of undo information for no apparent
reason.  After some editing operation, usually a kill or the undo of a
kill, etc., Emacs spontaneously decides that there is "no further undo
information", even though there clearly was, and the buffer is still
marked as modified.

It seems to happen _less_ frequently in 22.2 than in 22.1 so far, but
it's hard to tell, since I've been unable to come up with a reliable
way to reproduce the bug.

Is this a known problem?  Has anyone else reported something similar?
I've been trying to think of a way to debug it, but it seems very
difficult since there's no way to know when the bug will happen, and
once it happens, it's presumably too late to find out why...

This is running under Win32, btw, if that makes any difference: GNU
Emacs 22.2.1 (i386-mingw-nt5.1.2600)

- Casey
Tags added: moreinfo Request was from Glenn Morris <rgm <at> gnu.org> to control <at> emacsbugs.donarmstrong.com. (Mon, 07 Jul 2008 21:05:08 GMT) Full text and rfc822 format available.
Tags removed: moreinfo Request was from Jason Rumney <jasonr <at> gnu.org> to control <at> emacsbugs.donarmstrong.com. (Sat, 20 Dec 2008 10:05:05 GMT) Full text and rfc822 format available.
Merged 530 1501. Request was from Jason Rumney <jasonr <at> gnu.org> to control <at> emacsbugs.donarmstrong.com. (Sat, 20 Dec 2008 10:05:05 GMT) Full text and rfc822 format available.
Severity set to `wishlist' from `normal' Request was from Chong Yidong <cyd <at> stupidchicken.com> to control <at> emacsbugs.donarmstrong.com. (Tue, 27 Jan 2009 21:05:10 GMT) Full text and rfc822 format available.
Severity set to `wishlist' from `wishlist' Request was from Chong Yidong <cyd <at> stupidchicken.com> to control <at> emacsbugs.donarmstrong.com. (Tue, 27 Jan 2009 21:10:04 GMT) Full text and rfc822 format available.
Added tag(s) patch. Request was from Stefan Kangas <stefan <at> marxist.se> to control <at> debbugs.gnu.org. (Wed, 20 Oct 2021 01:02:02 GMT) Full text and rfc822 format available.
Added tag(s) wontfix. Request was from Stefan Kangas <stefan <at> marxist.se> to control <at> debbugs.gnu.org. (Thu, 21 Oct 2021 20:47:03 GMT) Full text and rfc822 format available.
bug closed, send any further explanations to 1501 <at> debbugs.gnu.org and "Emerick Rogul" <emerick <at> gmail.com> Request was from Stefan Kangas <stefan <at> marxist.se> to control <at> debbugs.gnu.org. (Thu, 21 Oct 2021 20:47:03 GMT) Full text and rfc822 format available.
bug archived. Request was from Debbugs Internal Request <help-debbugs <at> gnu.org> to internal_control <at> debbugs.gnu.org. (Fri, 19 Nov 2021 12:24:04 GMT) Full text and rfc822 format available.
This bug report was last modified 2 years and 159 days ago.

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