[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
bug#23785: Emacs 25: "Undo" overdoes things.
From: |
Alan Mackenzie |
Subject: |
bug#23785: Emacs 25: "Undo" overdoes things. |
Date: |
Fri, 17 Jun 2016 17:45:35 +0000 |
User-agent: |
Mutt/1.5.24 (2015-08-30) |
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).
- bug#23785: Emacs 25: "Undo" overdoes things., Alan Mackenzie, 2016/06/17
- bug#23785: Emacs 25: "Undo" overdoes things., Eli Zaretskii, 2016/06/17
- bug#23785: Emacs 25: "Undo" overdoes things.,
Alan Mackenzie <=
- bug#23785: Emacs 25: "Undo" overdoes things., Eli Zaretskii, 2016/06/17
- bug#23785: Emacs 25: "Undo" overdoes things., Phillip Lord, 2016/06/17
- bug#23785: Emacs 25: "Undo" overdoes things., Stefan Monnier, 2016/06/18
- bug#23785: Emacs 25: "Undo" overdoes things., Eli Zaretskii, 2016/06/18
- bug#23785: Emacs 25: "Undo" overdoes things., Stefan Monnier, 2016/06/18
- bug#23785: Emacs 25: "Undo" overdoes things., Eli Zaretskii, 2016/06/18
- bug#23785: Emacs 25: "Undo" overdoes things., Stefan Monnier, 2016/06/18
- bug#23785: Emacs 25: 'Undo' overdoes things., Phillip Lord, 2016/06/19
- bug#23785: Emacs 25: 'Undo' overdoes things., Stefan Monnier, 2016/06/19
- bug#23785: Emacs 25: 'Undo' overdoes things., Phillip Lord, 2016/06/20