From: Alan Mackenzie <acm@muc.de>
To: Eli Zaretskii <eliz@gnu.org>
Cc: 23785@debbugs.gnu.org
Subject: bug#23785: Emacs 25: "Undo" overdoes things.
Date: Fri, 17 Jun 2016 17:45:35 +0000 [thread overview]
Message-ID: <20160617174535.GD3316@acm.fritz.box> (raw)
In-Reply-To: <83r3bvbuu1.fsf@gnu.org>
Hello, Eli.
On Fri, Jun 17, 2016 at 08:15:18PM +0300, Eli Zaretskii wrote:
> > Date: Fri, 17 Jun 2016 15:02:45 +0000
> > From: Alan Mackenzie <acm@muc.de>
> > Summary: `undo' is broken in Emacs 25.
> > In GNU Emacs 25.0.94.2 (x86_64-unknown-linux-gnu, GTK+ Version 3.18.7)
> > of 2016-06-07 built on acm
> > Repository revision: 9d5ccebeba0506f7280662630f0ee85a52c8a327
> > Configured using:
> > 'configure --with-tiff=no --with-gif=no --with-gpm'
> > 1. emacs -Q
> > 2. C-x C-f decls-6.cc ; file is attached.
> > 3. Move point to BOL 17.
> > 4. C-o, and insert the line "Type var = init;". Call this line 16½.
> > 5. M-x revert-buffer.
> > 6. Move point to "[" on L16, and use C-M-k to delete "[3 * peq]".
> > 7. C-_. This restores "[3 * peq]" (correctly) but also reinserts line
> > 16½ (which is a bug).
> Why does this minor issue deserve to declare 'undo' "broken"? Looks
> like an exaggeration to me.
I don't think it's all that minor an issue. `undo' can no longer be
depended upon to restore a buffer to its unchanged state.
I've suffered several similar annoyances with `undo' in the emacs-25
branch.
Each buffer changing command is meant to have its own undo boundary
(with the exception of self-insert-command and the single character
deleting command).
And having to undo/redo command sequences by hand is _very_ irritating
when testing.
I think there's a case to be made for fixing this bug for Emacs 25.1.
--
Alan Mackenzie (Nuremberg, Germany).
next prev parent reply other threads:[~2016-06-17 17:45 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-17 15:02 bug#23785: Emacs 25: "Undo" overdoes things Alan Mackenzie
2016-06-17 17:15 ` Eli Zaretskii
2016-06-17 17:45 ` Alan Mackenzie [this message]
2016-06-17 20:07 ` Eli Zaretskii
2016-06-17 21:47 ` Phillip Lord
2016-06-18 4:46 ` Stefan Monnier
2016-06-18 7:54 ` Eli Zaretskii
2016-06-18 18:42 ` Stefan Monnier
2016-06-18 19:02 ` Eli Zaretskii
2016-06-18 19:52 ` Stefan Monnier
2016-06-19 22:45 ` bug#23785: Emacs 25: 'Undo' " Phillip Lord
2016-06-20 0:59 ` Stefan Monnier
2016-06-20 12:47 ` Phillip Lord
2016-06-20 14:04 ` Stefan Monnier
2016-06-20 15:03 ` Phillip Lord
2016-06-20 15:34 ` Eli Zaretskii
2016-06-20 17:12 ` Phillip Lord
2016-06-21 13:17 ` Eli Zaretskii
2016-06-21 14:30 ` Phillip Lord
2016-06-21 21:25 ` Stefan Monnier
2016-06-21 22:08 ` Phillip Lord
2020-09-04 14:03 ` Lars Ingebrigtsen
2020-09-05 13:15 ` Alan Mackenzie
2016-06-21 13:18 ` Eli Zaretskii
2016-06-21 14:29 ` Phillip Lord
2016-06-21 16:13 ` Eli Zaretskii
2016-06-17 21:23 ` bug#23785: Emacs 25: "Undo" " Phillip Lord
2016-06-18 17:41 ` Alan Mackenzie
2016-06-17 21:49 ` Óscar Fuentes
2016-06-20 12:33 ` Phillip Lord
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