GNU logs - #23903, boring messages

Message sent to bug-gnu-emacs@HIDDEN:

Subject: bug#23903: 25.0.95; Undo after keyboard shortcuts differs from undo after M-x ... RET
Resent-From: Markus Triska <triska@HIDDEN>
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From: Markus Triska <triska@HIDDEN>
Date: Wed, 06 Jul 2016 00:45:08 +0200
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With the latest emacs-25 git, please do the following:

1) Invoke Emacs via:

    emacs -Q --eval "(defun bc () (interactive)\
                         (start-process \"bc\" (current-buffer) \"bc\"))" \
          --eval "(global-set-key [f9] 'bc)" \
          --eval "(save-excursion (insert \"hello\"))"

2) Press (F9 is bound to the function bc by the snippet above):

   F9 C-/

   After undo, point is at the beginning of the buffer, as expected.

3) Press:

   M-x bc RET C-/

   After undo, point is unexpectedly at the end of the buffer instead.

Thank you for looking into this!

All the best,
Markus

In GNU Emacs 25.0.95.4 (x86_64-apple-darwin15.5.0, X toolkit, Xaw scroll bars)
 of 2016-07-05 built on mt-imac
Repository revision: e3b039d1a0e611d6619ed3ce67d125160d644ebc
Windowing system distributor 'The X.Org Foundation', version 11.0.11502000
Configured using:
 'configure --without-ns CFLAGS=-I/opt/local/include
 LDFLAGS=-L/opt/local/lib'

Configured features:
XPM JPEG TIFF GIF PNG RSVG IMAGEMAGICK GSETTINGS NOTIFY ACL GNUTLS
LIBXML2 FREETYPE XFT ZLIB TOOLKIT_SCROLL_BARS LUCID X11

Important settings:
  value of $LANG: en_US.UTF-8
  locale-coding-system: utf-8-unix

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From: help-debbugs@HIDDEN (GNU bug Tracking System)
To: Markus Triska <triska@HIDDEN>
Subject: bug#23903: Acknowledgement (25.0.95; Undo after keyboard
 shortcuts differs from undo after M-x ... RET)
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Date: Tue, 05 Jul 2016 22:46:02 +0000

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23903: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=3D23903
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Message sent to bug-gnu-emacs@HIDDEN:

Subject: bug#23903: 25.0.95; Undo after keyboard shortcuts differs from undo after M-x ... RET
Resent-From: Lars Ingebrigtsen <larsi@HIDDEN>
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From: Lars Ingebrigtsen <larsi@HIDDEN>
References: <m2poqrg0wb.fsf@HIDDEN>
Date: Wed, 02 Dec 2020 12:45:59 +0100
In-Reply-To: <m2poqrg0wb.fsf@HIDDEN> (Markus Triska's message of "Wed,
 06 Jul 2016 00:45:08 +0200")
Message-ID: <87k0u02zyg.fsf@HIDDEN>
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Markus Triska <triska@HIDDEN> writes:

> With the latest emacs-25 git, please do the following:
>
> 1) Invoke Emacs via:
>
>     emacs -Q --eval "(defun bc () (interactive)\
>                          (start-process \"bc\" (current-buffer) \"bc\"))" \
>           --eval "(global-set-key [f9] 'bc)" \
>           --eval "(save-excursion (insert \"hello\"))"
>
> 2) Press (F9 is bound to the function bc by the snippet above):
>
>    F9 C-/
>
>    After undo, point is at the beginning of the buffer, as expected.
>
> 3) Press:
>
>    M-x bc RET C-/
>
>    After undo, point is unexpectedly at the end of the buffer instead.

(This bug report unfortunately got no response at the time.)

Thanks for a clear recipe for reproducing this bug.

I can confirm that this behaviour is still present in Emacs 28.  Does
anybody have any insight into why this may be happening (before I start
trying to debug it)?  

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

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