bug#52356: 27.2; Isearch prompt changes unexpectedly with char folding enabled

[Andrea Greselin]

> Do you think this problem exists only when isearch-lazy-count is
customised to t?

No, I can just launch ‘emacs -Q’, go to the beginning of the buffer
and start searching for something with ‘C-s M-s '’ to get the
flickering prompt. What the settings in the first message do is change
the prompt: it is ‘Pending char-fold I-search’ without them (after
doing ‘C-s M-s '’) and just ‘I-search:’ with them (where just ‘C-s’
suffices for starting a char-folded search).

Your patch works both with and without my settings. I don’t know if
there are cases where it suppresses useful messages.

On Sat, 11 Dec 2021 at 21:05, Juri Linkov <juri@linkov.net> wrote:

Hello Andrea,

> your patch works for me. If you’re going to submit it for merging
> you might consider replacing the old line with
>
>     (or (eq this-command 'isearch-del-char)
>
> just to avoid using ‘memq’ for comparing against a single item.

I'm still not sure about this change.  Do you think this problem
exists only when isearch-lazy-count is customized to t?
Do you see the same problem with the "pending" message
while using the default value of isearch-lazy-count nil?