GNU bug report logs - #56255
28.1.50; sxhash-equal does not change when object is modified

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Package: emacs;

Reported by: Ihor Radchenko <yantar92 <at> gmail.com>

Date: Mon, 27 Jun 2022 12:27:02 UTC

Severity: normal

Found in version 28.1.50

Fixed in version 29.1

Done: Lars Ingebrigtsen <larsi <at> gnus.org>

Bug is archived. No further changes may be made.

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From: Lars Ingebrigtsen <larsi <at> gnus.org>
To: Ihor Radchenko <yantar92 <at> gmail.com>
Cc: 56255 <at> debbugs.gnu.org
Subject: bug#56255: 28.1.50; sxhash-equal does not change when object is modified
Date: Wed, 29 Jun 2022 14:38:06 +0200

Ihor Radchenko <yantar92 <at> gmail.com> writes:

> The original idea was to detect changed objects in most generic way, as
> a part of persistent storage library. Oh well.

We could make SXHASH_MAX_DEPTH into a defvar -- or pass the depth in to
`sxhash-equal'.  However, the hash it's computing is geared towards hash
tables, so collisions are OK -- it's not a cryptographic hash, so I'm
not sure it would fit your use case anyway.  I.e., our sxhash_combine is
very simple.

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no
This bug report was last modified 3 years and 58 days ago.

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