bug#41338: Toolbar-bug in Emacs 27.0.91/Pretest

[Stephen Berman]

On Sun, 17 May 2020 16:12:38 +0300 Eli Zaretskii <eliz@gnu.org> wrote:

> On May 17, 2020 3:59:55 PM GMT+03:00, Stephen Berman <stephen.berman@gmx.net> 
> wrote:
>> The bug reported in the OP (the unexpected tool bar change) seems to
>> be triggered by isearch (it was part of the OP's recipe and I haven't
>> been able to reproduce it without using isearch), but maybe the
>> observation about isearch I reported in my followup is a separate bug
>> or perhaps no bug, even though it surprised me.
>>
>> Steve Berman
>
> So the problem is that the toolbar is not reconfigured to reflect the fact
> that we are in Isearch?

In the OP the tool bar change was in the message-mode buffer, not the
buffer where isearch was invoked.  My additional observation was that in
the latter buffer the tool bar and lighter indicated isearch in
progress, but the overlays were missing and point was in its pre-isearch
position.

> Does it make sense to remain in Isearch in tbis scenario?  Could it be
> that we are over-engineering this stuff?

As I reported in my followup to Martin, it is only when deleting the
frame by clicking the toolkit's close frame button that isearch remains
in progress, with `C-x 5 0' it is cancelled.  So the former seems to be
the problematic case, since it's also the method used in the OP.

Steve Berman