Re: [9.4] LOGBOOK visibility

[Kévin Le Gouguec]

I haven't reached the bottom of this rabbit hole yet.  Since I think
I've spent all the time I had to spend in this issue for the day, here's
where I'm at.

If I open my example file[1] with Org 9.3 and master (86fada6b5), and
compare the overlays covering the hidden part of the first LOGBOOK
drawer, like so:

#+begin_src sh
#!/bin/bash

set -eu

point=67

orgs=(
    "${path_to_org_9_3}"
    "${path_to_org_master}"
)

for o in "${orgs[@]}"
do
    emacs -Q -batch \
          -L "${o}"/lisp \
          -eval "(find-file \"logbooks.org\")" \
          -eval "(message org-version)" \
          -eval "(dolist (o (overlays-at ${point}))
                   (message \"from %s to %s\" (overlay-start o) (overlay-end o))
                   (message \"%s\" (overlay-properties o)))"
    echo
done
#+end_src

Here is what I get:

> 9.3
> from 32 to 2015
> (evaporate t invisible outline isearch-open-invisible #[lambda gibberish 
> involving (org-show-context 'isearch)])
> from 67 to 262
> (isearch-open-invisible delete-overlay invisible org-hide-drawer evaporate t)
> 
> 9.3.7
> from 32 to 2015
> (isearch-open-invisible delete-overlay invisible outline evaporate t)

- The LOGBOOK overlay (from 67 to 262) vanished.

- The isearch-open-invisible property of the "project 1" overlay (from
  32 to 2015) changed from a lambda[2] to just delete-overlay.


Again, not sure this shows there's an issue; for all I know Org 9.4 just
works differently and nothing's wrong there.  I hope someone can chime
in and take it up from here; otherwise I'll resume my investigations
sometime later.


[1] 87eepuz0bj.fsf@gmail.com/2-logbooks.org">https://orgmode.org/list/87eepuz0bj.fsf@gmail.com/2-logbooks.org

[2] Which I guess is the value of
    outline-isearch-open-invisible-function, set locally by org-mode in
    the major mode function?