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bug#6316: 24.0.50; unexpected region highlighting
From: |
Stephen Berman |
Subject: |
bug#6316: 24.0.50; unexpected region highlighting |
Date: |
Tue, 24 Jun 2014 17:59:16 +0200 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/24.3.91 (gnu/linux) |
On Mon, 23 Jun 2014 12:31:37 -0400 Stefan Monnier <monnier@iro.umontreal.ca>
wrote:
>> Indeed, the recipe David De La Harpe Golden gave still produces
>> unexpected highlighting (though, despite being phenomenologically the
>> same sort of problem, maybe it's technically different, since it happens
>> even with transient-mark-mode enabled).
>
> I installed another patch into trunk which should fix this problem
> more thoroughly. Can you confirm it fixes all the cases you know?
It does not fix the above case, though again, since that happens whether
or not transient-mark-mode is enabled, it's probably a different issue.
It does fix the case I mentioned in my previous reply of using a motion
command to unhighlight the region when transient-mark-mode is disabled,
so it improves upon the previous patch in that respect.
However, with your new patch, temporarily enabling transient-mark-mode,
when it is disabled, seems to break transient-mark-mode; here's a
recipe:
0. emacs -Q
1. Sanity check: `M-< C-SPC M-f' results in ";; This" being highlighted.
Typing `M-x transient-mark-mode' shows the message "Transient-Mark
mode disabled" and results in ";; This" becoming unhighlighted.
Now typing `C-SPC M-f M-x transient-mark-mode' shows the message
"Transient-Mark mode enabled" and results in " buffer" being
highlighted.
2. Type `M-x transient-mark-mode' to disable transient-mark-mode again.
3. Type `C-SPC C-SPC' to temporarily enable transient-mark-mode, showing
the message "Mark activated".
4. Type `M-x transient-mark-mode' to enable transient-mark-mode again
(verified by the message "Transient-Mark mode enabled").
5. Type `C-SPC M-f'
=> The region is not highlighted. Moreover, `C-h v transient-mark-mode'
says:
transient-mark-mode is a variable defined in `C source code'.
Its value is nil
Original value was t
Local in buffer *scratch*; global value is t
The same thing happens if in step 3 you use shift-selection instead of
`C-SPC C-SPC'.
Steve Berman