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bug#53910: 29.0.50; context-menu-mode breaks help in read-only buffers
From: |
Juri Linkov |
Subject: |
bug#53910: 29.0.50; context-menu-mode breaks help in read-only buffers |
Date: |
Thu, 10 Feb 2022 10:54:29 +0200 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/29.0.50 (x86_64-pc-linux-gnu) |
>> M-x context-menu-mode
>> C-h b
>>
>> Just a message is shown in the echo area like an error because the
>> buffer is read only (and such text can't be inserted...).
>
> I can reproduce this bug, and I can't get a backtrace either, even with
> debug-on-signal, which is unusual.
>
> I had a brief peek at context-menu-mode to see whether it was obvious
> what was breaking, but nothing really stood out (but then again, I'm not
> very familiar with that code).
I can't reproduce this bug in Emacs 28, only in Emacs 29.
This means that the problem is new. In describe-map
this line switches buffers from *Help* to the window buffer:
(eq definition (lookup-key tail (vector event) t))
And indeed
(with-temp-buffer
(message "%S" (current-buffer))
(lookup-key (cddr context-menu-mode-map) [down-mouse-3] t)
(message "%S" (current-buffer)))
displays:
#<buffer *temp*>
#<buffer *scratch*>
This is because of this line recently added to context-menu-map:
(select-window (posn-window (event-start click)))
that switches buffers.
But the question remains: does describe-map really need to build
the complete context menu or should it ignore its :filter keyword?
- bug#53910: 29.0.50; context-menu-mode breaks help in read-only buffers, Ergus, 2022/02/09
- bug#53910: 29.0.50; context-menu-mode breaks help in read-only buffers, Lars Ingebrigtsen, 2022/02/10
- bug#53910: 29.0.50; context-menu-mode breaks help in read-only buffers,
Juri Linkov <=
- bug#53910: 29.0.50; context-menu-mode breaks help in read-only buffers, Lars Ingebrigtsen, 2022/02/10
- bug#53910: 29.0.50; context-menu-mode breaks help in read-only buffers, Juri Linkov, 2022/02/10
- bug#53910: 29.0.50; context-menu-mode breaks help in read-only buffers, martin rudalics, 2022/02/11
- bug#53910: 29.0.50; context-menu-mode breaks help in read-only buffers, Juri Linkov, 2022/02/11
- bug#53910: [External] : bug#53910: 29.0.50; context-menu-mode breaks help in read-only buffers, Drew Adams, 2022/02/11
- bug#53910: [External] : bug#53910: 29.0.50; context-menu-mode breaks help in read-only buffers, Juri Linkov, 2022/02/12
- bug#53910: [External] : bug#53910: 29.0.50; context-menu-mode breaks help in read-only buffers, martin rudalics, 2022/02/13
- bug#53910: [External] : bug#53910: 29.0.50; context-menu-mode breaks help in read-only buffers, Juri Linkov, 2022/02/13
- bug#53910: [External] : bug#53910: 29.0.50; context-menu-mode breaks help in read-only buffers, Stefan Monnier, 2022/02/17
- bug#53910: [External] : bug#53910: 29.0.50; context-menu-mode breaks help in read-only buffers, Juri Linkov, 2022/02/17