From mboxrd@z Thu Jan  1 00:00:00 1970
From: Nicolas Goaziou <mail@nicolasgoaziou.fr>
Subject: Re: Bug: turning on column view modifies file [9.0.7
 (release_9.0.7-439-g2906e5 @ /home/tews/src/org-mode/lisp/)]
Date: Mon, 22 May 2017 14:20:20 +0200
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In-Reply-To: <87fufxjeeq.fsf@cert.kernkonzept.com> (Hendrik Tews's message of
	"Mon, 22 May 2017 13:53:49 +0200")
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To: Hendrik Tews <hendrik@askra.de>
Cc: emacs-orgmode@gnu.org

Hello,

Hendrik Tews <hendrik@askra.de> writes:

> turning on column view might change the buffer, because it
> sometimes stores computed values in properties. Is this really
> intended?

It is. But it only happens if the property already exists in the
summarized node.

> At least I could not find this behavior described in the
> documentation.

Would you want to suggest an improvement to the manual?

> For instance, in the following buffer
>
>     * a
>          :PROPERTIES:
>          :XX:
>          :END:
>     ** b
>          :PROPERTIES:
>          :XX:   2.0
>          :END:
>
>     #+COLUMNS: %6XX{+;%5.1f} %10ITEM(Task)
>
> turning on column view changes property XX on a. If you turn on
> column view a second time (after saving, without undoing), the
> buffer is changed again, this time it is an invisible change,
> probably rewriting the value for XX on a.

This is a bug. I fixed it in maint. Thank you.

Regards,

-- 
Nicolas Goaziou