GNU bug report logs - #1095
23.0.60; Unexpected point position after undo

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

From: Markus Triska <markus.triska <at> gmx.at>
To: emacs-pretest-bug <at> gnu.org
Subject: 23.0.60; Unexpected point position after undo 
Date: Mon,  6 Oct 2008 03:14:40 +0200 (CEST)

In "emacs -Q", when I insert into *scratch* the form:

   (progn (end-of-line) (insert "\nhi"))

then place point on the "g" and press C-M-x C-/, then the insertion is
undone, and point remains on the "g", as expected. When I then press
C-h f C-g C-M-x C-/, the insertion is undone, and point is
unexpectedly placed at the end of the form. When I then place point on
the "g" again, and again press C-M-x C-/, point again stays put. In
Emacs 22.2, point remains on the "g" in all these cases. In CVS Emacs,
`buffer-undo-list' after the first C-M-x on "g" is:

   (nil
    (229 . 232)
    196 nil
    (nil rear-nonsticky nil 228 . 229)
    (nil fontified nil 192 . 229)
    (192 . 229)
    (t 0 . 0)
    nil
    (1 . 192)
    (t 0 . 0))

Again in CVS Emacs, `buffer-undo-list' after C-h f C-g C-M-x (in
"emacs -Q") on the form above, with point on its "g", is:

   (nil
    (229 . 232)
    nil
    (nil rear-nonsticky nil 228 . 229)
    (nil fontified nil 192 . 229)
    (192 . 229)
    (t 0 . 0)
    nil
    (1 . 192)
    (t 0 . 0))

In Emacs 22.2.92, `buffer-undo-list' in both cases is:

   (nil
    (38 . 41)
    5 nil
    (nil rear-nonsticky nil 37 . 38)
    (nil fontified nil 1 . 38)
    (1 . 38)
    (t 0 . 0))


In GNU Emacs 23.0.60.3 (i386-apple-darwin8.11.1, GTK+ Version 2.12.9)
 of 2008-10-05 on mt-computer.local
Windowing system distributor `The XFree86 Project, Inc', version 11.0.40400000
Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: nil
  value of $LC_CTYPE: nil
  value of $LC_MESSAGES: nil
  value of $LC_MONETARY: nil
  value of $LC_NUMERIC: nil
  value of $LC_TIME: nil
  value of $LANG: en_GB.UTF-8
  value of $XMODIFIERS: nil
  locale-coding-system: nil
  default-enable-multibyte-characters: t

Message #10 received at 1095 <at> debbugs.gnu.org (full text, mbox):

From: Lars Magne Ingebrigtsen <larsi <at> gnus.org>
To: Markus Triska <markus.triska <at> gmx.at>
Cc: 1095 <at> debbugs.gnu.org
Subject: Re: 23.0.60; Unexpected point position after undo
Date: Sun, 11 Sep 2011 20:04:47 +0200

Markus Triska <markus.triska <at> gmx.at> writes:

> In "emacs -Q", when I insert into *scratch* the form:
>
>    (progn (end-of-line) (insert "\nhi"))
>
> then place point on the "g" and press C-M-x C-/, then the insertion is
> undone, and point remains on the "g", as expected. When I then press
> C-h f C-g C-M-x C-/, the insertion is undone, and point is
> unexpectedly placed at the end of the form. When I then place point on
> the "g" again, and again press C-M-x C-/, point again stays put. In
> Emacs 22.2, point remains on the "g" in all these cases.

I'm unable to reproduce this bug in Emacs 24.  Are you still seeing
this problem?

-- 
(domestic pets only, the antidote for overdose, milk.)
  bloggy blog http://lars.ingebrigtsen.no/

Message #15 received at 1095 <at> debbugs.gnu.org (full text, mbox):

From: Lars Magne Ingebrigtsen <larsi <at> gnus.org>
To: Markus Triska <markus.triska <at> gmx.at>
Cc: 1095 <at> debbugs.gnu.org
Subject: Re: 23.0.60; Unexpected point position after undo
Date: Sun, 25 Sep 2011 23:46:35 +0200

Lars Magne Ingebrigtsen <larsi <at> gnus.org> writes:

>> In "emacs -Q", when I insert into *scratch* the form:
>>
>>    (progn (end-of-line) (insert "\nhi"))
>>
>> then place point on the "g" and press C-M-x C-/, then the insertion is
>> undone, and point remains on the "g", as expected. When I then press
>> C-h f C-g C-M-x C-/, the insertion is undone, and point is
>> unexpectedly placed at the end of the form. When I then place point on
>> the "g" again, and again press C-M-x C-/, point again stays put. In
>> Emacs 22.2, point remains on the "g" in all these cases.
>
> I'm unable to reproduce this bug in Emacs 24.  Are you still seeing
> this problem?

More information was requested, but was apparently not given, so I'm
closing this bug report.  If this is still a problem, please reopen the
bug report.

-- 
(domestic pets only, the antidote for overdose, milk.)
  bloggy blog http://lars.ingebrigtsen.no/

Message #28 received at 1095 <at> debbugs.gnu.org (full text, mbox):

From: npostavs <at> users.sourceforge.net
To: Markus Triska <triska <at> metalevel.at>
Cc: 21722 <at> debbugs.gnu.org, 1095 <at> debbugs.gnu.org
Subject: Re: bug#21722: 25.0.50; Unexpected point position after undo
Date: Wed, 10 Aug 2016 21:16:56 -0400

Markus Triska <triska <at> metalevel.at> writes:

> In "emacs -Q", when I insert into *scratch* the form:
>
>    (progn (end-of-line) (insert "\nhi"))
>
> then place point on the "g" and press C-M-x C-/, then the insertion is
> undone, and point remains on the "g", as expected. When I then press:
>
>    C-h f C-g C-M-x C-/
>
> the insertion is undone, and point is unexpectedly placed at the end of
> the form instead of remaining on the "g". When I then place point on the
> "g" again, and again press C-M-x C-/, point again stays on the "g".
>
> Thus, point position after undo is sometimes unexpected.

In 25.1-rc1 the point position stays in place for both cases.  So I
guess this can be considered fixed?

(In 25.0.93 (which I happened to have lying around), it moves in both
cases)

Message #31 received at 1095 <at> debbugs.gnu.org (full text, mbox):

From: Markus Triska <triska <at> metalevel.at>
To: npostavs <at> users.sourceforge.net
Cc: 21722 <at> debbugs.gnu.org, 1095 <at> debbugs.gnu.org
Subject: Re: bug#21722: 25.0.50; Unexpected point position after undo
Date: Fri, 12 Aug 2016 08:37:49 +0200

npostavs <at> users.sourceforge.net writes:

> In 25.1-rc1 the point position stays in place for both cases.  So I
> guess this can be considered fixed?

Yes, this is fixed. Phillip Lord corrected this in #23871, thank you!

All the best,
Markus

Message #38 received at 1095 <at> debbugs.gnu.org (full text, mbox):

From: phillip.lord <at> russet.org.uk (Phillip Lord)
To: npostavs <at> users.sourceforge.net
Cc: 21722 <at> debbugs.gnu.org, 1095 <at> debbugs.gnu.org,
 Markus Triska <triska <at> metalevel.at>
Subject: Re: bug#21722: 25.0.50; Unexpected point position after undo
Date: Fri, 19 Aug 2016 16:45:50 +0100

npostavs <at> users.sourceforge.net writes:

> Markus Triska <triska <at> metalevel.at> writes:
>
>> In "emacs -Q", when I insert into *scratch* the form:
>>
>>    (progn (end-of-line) (insert "\nhi"))
>>
>> then place point on the "g" and press C-M-x C-/, then the insertion is
>> undone, and point remains on the "g", as expected. When I then press:
>>
>>    C-h f C-g C-M-x C-/
>>
>> the insertion is undone, and point is unexpectedly placed at the end of
>> the form instead of remaining on the "g". When I then place point on the
>> "g" again, and again press C-M-x C-/, point again stays on the "g".
>>
>> Thus, point position after undo is sometimes unexpected.
>
> In 25.1-rc1 the point position stays in place for both cases.  So I
> guess this can be considered fixed?
>
> (In 25.0.93 (which I happened to have lying around), it moves in both
> cases)


Sorry, think I just forgot to close this one. Thanks for checking.

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