GNU bug report logs - #6388
Should not match data be set on misses?

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Package: emacs;

Reported by: Lennart Borgman <lennart.borgman <at> gmail.com>

Date: Thu, 10 Jun 2010 00:50:03 UTC

Severity: normal

Done: Eli Zaretskii <eliz <at> gnu.org>

Bug is archived. No further changes may be made.

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Message #20 received at 6388 <at> debbugs.gnu.org (full text, mbox):

From: Stefan Monnier <monnier <at> IRO.UMontreal.CA>
To: Lennart Borgman <lennart.borgman <at> gmail.com>
Cc: 6388 <at> debbugs.gnu.org
Subject: Re: bug#6388: Should not match data be set on misses?
Date: Thu, 10 Jun 2010 14:57:01 -0400

>> The main obstacle to such a change are:
>> - it breaks some code.
> Aka it makes some bugs (bad assumptions) surface. That is not always bad.

I really meant bugs, as in: the code consciously takes advantage of
current behavior.  Those assumptions are only bad if we define them
that way.

> Yes, that is true. However the current behavior probably wastes a lot
> of time for those unaware of it.

Just like with programming with monitors where you're taught "always do
the wait within a `while' loop", regexp-patching should always take
place within a `if' or equivalent,


        Stefan
This bug report was last modified 14 years and 350 days ago.

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