bug#64696: 30.0.50; indent-to inherits preceding text properties, including 'invisible

[Ihor Radchenko]

Eli Zaretskii <eliz@gnu.org> writes:

>> With `indent-tabs-mode' disabled, running the test yields different
>> results. (AFAIU, it should not).
>
> Is this about indent-to or about current-column?  I'd like to see
> first if there are any problems in current-column.

Ok.

Test #3 with and without indent-tabs-mode are not the same:

(indent-tabs-mode is nil)
⛔ Warning (emacs): Test #3:: ’word’ is hidden applying ’invisible text property 
to heading body.
⛔ Warning (emacs): Moved point after first ’word’
⛔ Warning (emacs): 1:: current-column = 0
⛔ Warning (emacs): Indented to column 50
⛔ Warning (emacs): 3:: current-column = 0
⛔ Warning (emacs): Enabled visible mode
⛔ Warning (emacs): 5:: current-column = 54

(indent-tabs-mode is t)
⛔ Warning (emacs): Test #3:: ’word’ is hidden applying ’invisible text property 
to heading body.
⛔ Warning (emacs): Moved point after first ’word’
⛔ Warning (emacs): 1:: current-column = 0
⛔ Warning (emacs): Indented to column 50
⛔ Warning (emacs): 3:: current-column = 0
⛔ Warning (emacs): Enabled visible mode
⛔ Warning (emacs): 5:: current-column = 50

Note how the last current-column value is different.
It may be something about current-column or about indent-to.

-- 
Ihor Radchenko // yantar92,
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