GNU bug report logs - #32503
26.1; Byte-compiled functions don't hash consistently

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Message #13 received at 32503 <at> debbugs.gnu.org (full text, mbox):

From: Lars Ingebrigtsen <larsi <at> gnus.org>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: 32503 <at> debbugs.gnu.org, niwtrx <at> icloud.com,
 Daniel Colascione <dancol <at> dancol.org>, Adam Porter <adam <at> alphapapa.net>,
 38912 <at> debbugs.gnu.org
Subject: Re: bug#32503: 26.1; Byte-compiled functions don't hash consistently
Date: Thu, 24 Jun 2021 18:30:26 +0200

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

>> Sorry, haven't had a chance to look at it yet. I've been treating it as
>> low-ish priority because pdumping outside loadup isn't supported yet. Is
>> there some reason to expedite this work?
>
> Not that I can see, no.  I just wanted to be sure this isn't
> forgotten.
>
> Thanks.

This was a long thread, and I only skimmed it lightly.  But I noticed
that it was merged with this bug report:

Adam Porter <adam <at> alphapapa.net> writes:

> I noticed that byte-compiled functions don't hash consistently.  Here's
> an ECM from Noam Postavsky
> <https://github.com/skeeto/emacs-memoize/pull/10#issuecomment-415066682>:
>
>     (let ((obj1 (byte-compile (lambda (x) x)))
>           (obj2 (byte-compile (lambda (x) x))))
>       (list (equal obj1 obj2)
>             (eq obj1 obj2)
>             (= (sxhash obj1)
>                (sxhash obj2))))
>     ;=> (t nil nil)

And this test case no longer fails in Emacs 28 (but it fails in Emacs
27).  So is there more to be done in these merged bug reports?

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no

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