From: Eli Zaretskii <eliz@gnu.org>
To: Noam Postavsky <npostavs@gmail.com>
Cc: raeburn@permabit.com, 23397@debbugs.gnu.org
Subject: bug#23397: 25.0.92; assertion failure auto-reverting a file being overwritten
Date: Sun, 17 Jun 2018 08:36:35 +0300 [thread overview]
Message-ID: <83r2l6x9cs.fsf@gnu.org> (raw)
In-Reply-To: <87zhzutngf.fsf@gmail.com> (message from Noam Postavsky on Sat, 16 Jun 2018 17:45:36 -0400)
> From: Noam Postavsky <npostavs@gmail.com>
> Cc: Eli Zaretskii <eliz@gnu.org>, 23397@debbugs.gnu.org
> Date: Sat, 16 Jun 2018 17:45:36 -0400
>
> I don't quite understand what the overlap expression is trying to
> compute though.
It prevents us from re-using the same portion of buffer text for
matching both at start and at end of the file. This could happen,
e.g., with buffers whose contents is the same character, and a file
whose contents is mostly the same, but larger, and with a few
different characters in the middle. Then the "same_at_end" loop could
inadvertently match a part of the buffer that was already matched by
the "same_at_start" loop.
The overlap expression computes the portion of the buffer that was
matched by both "same_at_start" and "same_at_end" loops.
next prev parent reply other threads:[~2018-06-17 5:36 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-04-28 22:05 bug#23397: 25.0.92; assertion failure auto-reverting a file being overwritten Ken Raeburn
2016-05-02 16:47 ` Eli Zaretskii
2016-05-02 20:43 ` Ken Raeburn
2016-05-03 15:15 ` Eli Zaretskii
2016-05-03 21:04 ` Ken Raeburn
2018-06-16 21:45 ` Noam Postavsky
2018-06-17 5:36 ` Eli Zaretskii [this message]
2020-09-05 14:03 ` Lars Ingebrigtsen
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