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From: Stefan Monnier <monnier@iro.umontreal.ca>
To: Barry OReilly <gundaetiapo@gmail.com>
Cc: 16818@debbugs.gnu.org
Subject: bug#16818: Acknowledgement (Undo in region after markers in undo history relocated)
Date: Thu, 13 Mar 2014 09:24:28 -0400	[thread overview]
Message-ID: <jwvk3byz11x.fsf-monnier+emacsbugs@gnu.org> (raw)
In-Reply-To: <CAFM41H3gjuKz4joOw3eLRoNkbJ43Dh37Kvfhocv-zpkLO8BjHg@mail.gmail.com> (Barry OReilly's message of "Wed, 12 Mar 2014 21:59:55 -0400")

>> Thinking more about this, I think this is fixing the symptom, but
>> not the cause. The cause is that primitive-undo shouldn't blindly
>> obey a (MARKER . OFFSET) entry. Instead it should only obey it if
>> the marker still points at the corresponding place.

> From what I can tell, the root cause is relocating markers to
> unrelated locations in the buffer while another part of Emacs still
> has a reference to it.

Not sure in which way what you're saying is different from what I'm saying.
Are we in violent agreement?

> Your counter proposal is a step from the root.  For instance, the
> markers within the mark rings will not adjust correctly, whilst with
> my patch they will.

Can you give an example incorrect adjustment?

>> (creating new markers each time instead)
> My patch actually results in fewer markers created.

Right, I didn't mean that creating new markers is a problem.


        Stefan





  reply	other threads:[~2014-03-13 13:24 UTC|newest]

Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-02-19 22:15 bug#16818: Undo in region after markers in undo history relocated Barry OReilly
     [not found] ` <handler.16818.B.13928481719895.ack@debbugs.gnu.org>
2014-02-19 23:07   ` bug#16818: Acknowledgement (Undo in region after markers in undo history relocated) Barry OReilly
2014-02-20  4:53     ` Stefan Monnier
2014-02-20 14:38       ` Barry OReilly
2014-02-24 22:46       ` Barry OReilly
2014-02-25 21:43         ` Stefan Monnier
2014-02-26 15:18           ` Barry OReilly
2014-03-11 21:24           ` Barry OReilly
2014-03-12 23:24             ` Stefan Monnier
2014-03-13  1:59               ` Barry OReilly
2014-03-13 13:24                 ` Stefan Monnier [this message]
2014-03-13 14:35                   ` Stefan Monnier
2014-03-13 16:55                     ` Barry OReilly
2014-03-17 23:05                     ` Barry OReilly
2014-03-18  0:02                       ` Stefan
2014-03-19 13:36                         ` Barry OReilly
2014-03-19 18:52                           ` Stefan
2014-03-19 13:45                         ` Barry OReilly
2014-03-19 18:56                           ` Stefan
2014-03-23 22:49                             ` Barry OReilly
2014-03-24 13:03                               ` Stefan
2014-03-24 22:10                                 ` Barry OReilly
2014-03-25  1:28                                   ` Stefan
2014-03-25  2:32                                     ` Barry OReilly
2020-09-09 12:25                                       ` Lars Ingebrigtsen
2020-12-06 15:57                                         ` bug#16818: Undo in region after markers in undo history relocated Lars Ingebrigtsen

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