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bug#20841: 25.0.50; Turning off `which-function-mode' does not remove it
From: |
Stefan Kangas |
Subject: |
bug#20841: 25.0.50; Turning off `which-function-mode' does not remove its last effect from the minibuffer |
Date: |
Mon, 31 Aug 2020 02:11:18 +0000 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux) |
tags 20841 + moreinfo unreproducible
thanks
Drew Adams <drew.adams@oracle.com> writes:
>> > Subject line says it all.
>>
>> I'm unable to reproduce this on the trunk. I see that there have been
>> changes to the mode in the last year, but skimming the changes, I don't
>> see anything in the "switch the mode off" path...
>>
>> Are you still seeing this?
>
> Yes, I'm still seeing it. I turn it off and I still see things
> like `[Documentation]' and `[???]' in the mode line of existing
> buffers.
>
> When this is true of *Help*, for instance, i.e., it remains
> in the mode line after I've toggled it off, if I then ask
> for something else to be displayed in *Help* (e.g. do `C-h f'),
> then it is removed from the mode line.
>
> I see this in my setup, but my setup does nothing with
> `which-function-mode'. One guess is that the bug might
> manifest itself only if you have a standalone minibuffer.
I can't reproduce this under "emacs -Q" either.
I think we need more information here. I suspect that this issue is
related to some package or configuration you do, possibly with regards
to the mode-line.
> Another guess might be (since ediff uses a separate control
> frame (?)) that it is similar to whatever is behind this
> comment in the code:
>
> ;; FIXME: Why does ediff require special support?
Possibly. You could try running this to see if it makes any difference:
(which-func-update-1 (get-buffer-window))
> Another guess is that it might have to do with
> `mode-line-misc-info'.
After my attempts reproducing the bug and reading the code, I doubt
that. But it's possible.
> After I've turned the mode off I see that the value of
> variable `which-func-mode' remains `t' in buffers, even
> though the global value has been changed to `nil'.
That variable is t in buffers that support which-function-mode. IOW,
this is expected.
> I don't have time to try to debug this.
> Close it if no one else has the time. I no longer
> turn the mode on at all, to avoid the annoyance.
Maybe you have more time to investigate this today than you did when
this was first reported?
Lacking more information, I unfortunately think it will be hard to get
much further here.
- bug#20841: 25.0.50; Turning off `which-function-mode' does not remove its last effect from the minibuffer,
Stefan Kangas <=