GNU bug report logs - #27968
26.0.50; dired-revert: Saved positions might change if a dired header changes

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Message #11 received at 27968 <at> debbugs.gnu.org (full text, mbox):

From: Tino Calancha <tino.calancha <at> gmail.com>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: 27968 <at> debbugs.gnu.org, stephen.berman <at> gmx.net,
 Tino Calancha <tino.calancha <at> gmail.com>
Subject: Re: bug#27968: 26.0.50; dired-revert: Saved positions might change
 if a dired header changes
Date: Sun, 6 Aug 2017 00:45:02 +0900 (JST)

On Sat, 5 Aug 2017, Eli Zaretskii wrote:

>> From: Tino Calancha <tino.calancha <at> gmail.com>
>> Date: Sat, 05 Aug 2017 22:01:34 +0900
>> Cc: stephen berman <stephen.berman <at> gmx.net>
>>
>> Dired headers also changes; if you add/deleted some files,
>> the used space shown changes: that will mess up the saved
>> buffer positions if the length of the header is different.
>>
>> This problem causes dired-test-bug27243-01 to fail in hydra.
>>
>> One possible solution is the patch below.  It saves line numbers
>> instead of positions.  Line numbers won't change if a dired header
>> changes its length.
>
> Won't using markers be a better solution?
Yes, but `dired-revert' erases the buffer when calls
`dired-readin', so that the markers will 'gone baby gone': neither
the very same Casey Affleck could recover those markers.

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