From mboxrd@z Thu Jan  1 00:00:00 1970
From: Vlad Shcherbina <vlad.shcherbina@gmail.com>
Subject: Bug: org-catch-invisible-edits still allows some invisible edits
 [9.1.9]
Date: Sun, 12 May 2019 20:41:27 +0300
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Steps to reproduce:
1. runemacs.exe -Q
2. In the scratch buffer, M-x org-mode
3. M-: (setq org-catch-invisible-edits 'show-and-error)
    (could be also reproduced with 'smart)
4. Replace the content of the scratch buffer with the following:
* hello
** world
5. Position point at the end of "hello", press Tab to collapse.
So it looks like this:
* hello<point>...
6. Press Del.

Expected result:
Edit should be prevented because it deletes invisible character.

Actual result:
Edit is performed without any warning.
By the way, the editor ends up in corrupt state because the content
of the buffer is now "* hello** world", but it is displayed as
"* hello..." and you can't uncollapse it by pressing Tab anymore.

Version info:
GNU Emacs 26.2 (build 1, x86_64-w64-mingw32) of 2019-04-13
Org mode version 9.1.9 (release_9.1.0-65-g5e4542 @
c:/emacs/share/emacs/26.2/lips/org/)