GNU bug report logs - #75626
31.0.50; Dired misses or double-processes files when auto-revert-mode is enabled

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From: Michael Heerdegen <michael_heerdegen <at> web.de>
To: Tassilo Horn <tsdh <at> gnu.org>
Cc: 75626 <at> debbugs.gnu.org, Eli Zaretskii <eliz <at> gnu.org>
Subject: bug#75626: 31.0.50; Dired misses or double-processes files when auto-revert-mode is enabled
Date: Sat, 18 Jan 2025 00:36:10 +0100

Tassilo Horn <tsdh <at> gnu.org> writes:

> Well, there are exactly 100 files.  So it processed 62 files twice,
> compressing them first and then uncompressing them again (or skipped
> some and processed other even more).

It could be that the order of the marked files changed after reverting.

But even if not: if you look at the use of the variable `next-position'
in `dired-map-over-marks', it is also possible to get such an effect if
the line lengths change.

So the command `dired-do-compress' is not robust against this effect.
Other commands calculate the complete list of marked files first,
`dired-do-chxxx' and `dired-do-chmod' for example.  So I think it is not
unavoidable that it is like that.


Michael.

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