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From: Stefan Monnier <monnier@iro.umontreal.ca>
To: dancol@dancol.org
Cc: niwtrx@icloud.com, Paul Eggert <eggert@cs.ucla.edu>,
	emacs-devel@gnu.org, 38912@debbugs.gnu.org,
	Pip Cet <pipcet@gmail.com>
Subject: bug#38912: 27.0.60; PDumper meets segmentation fault when evil is loaded
Date: Tue, 07 Jan 2020 09:16:31 -0500	[thread overview]
Message-ID: <jwvv9pnz76y.fsf-monnier+emacs__20533.9693160326$1578409492$gmane$org@gnu.org> (raw)
In-Reply-To: <f8866ddf-66d2-4406-92a8-15f11554e270@email.android.com> (dancol@dancol.org's message of "Mon, 06 Jan 2020 19:34:06 -0800")

>  The worst case is window configurations, where there's a nontrivial 
>  function compare_window_configurations that Fequal delegates to.

Indeed, this is very strange.

>  Does anyone know offhand why we don't simply use eq to compare window 
>  configurations?

I'm curious about it too.  As a long-time Elisp coder, I find this
behavior very odd (I just discovered it while looking at the code)
and I think having them compared by identity would make a lot more sense.

> I think changing the equal behavior of these objects would be
> a compatibility change.

Indeed.  It's clearly out of the question for Emacs-27.  But I'd be in
favor of introducing this backward incompatibility in Emacs-28, unless
we can find a good use case where the structural-equality is needed
for them.


        Stefan






  reply	other threads:[~2020-01-07 14:16 UTC|newest]

Thread overview: 45+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-01-04  1:49 bug#38912: 27.0.60; PDumper meets segmentation fault when evil is loaded NiwTinray via Bug reports for GNU Emacs, the Swiss army knife of text editors
2020-01-04  9:17 ` Eli Zaretskii
     [not found]   ` <D1473DD8-48F8-4204-80B5-BE6396B8B668@icloud.com>
2020-01-05 18:45     ` Eli Zaretskii
2020-01-06 15:51       ` Pip Cet
2020-01-06 16:34         ` Eli Zaretskii
2020-01-06 16:38           ` Pip Cet
2020-01-06 17:20             ` Eli Zaretskii
2020-01-06 17:01           ` Daniel Colascione
2020-01-06 17:13             ` Pip Cet
2020-01-06 17:30               ` Eli Zaretskii
2020-01-06 18:13                 ` Stefan Monnier
2020-01-06 18:19                   ` Noam Postavsky
2020-01-06 18:29                   ` Eli Zaretskii
2020-01-07 19:31                   ` Pip Cet
2020-01-07 20:03                     ` Stefan Monnier
2020-01-07  2:38               ` Paul Eggert
2020-01-07  3:34                 ` dancol
2020-01-07 14:16                   ` Stefan Monnier [this message]
2020-01-07 14:16                   ` Stefan Monnier
2020-01-07 19:32                     ` Paul Eggert
2020-01-07 19:32                     ` Paul Eggert
2020-01-07 15:47                 ` Eli Zaretskii
2020-01-07 17:37                   ` Stefan Monnier
2020-01-07 17:37                   ` Stefan Monnier
2020-01-07 17:43                     ` Eli Zaretskii
2020-01-07 18:01                       ` Stefan Monnier
2020-01-07 18:11                         ` Eli Zaretskii
2020-01-07 18:47                           ` Stefan Monnier
2020-01-07 18:47                           ` Stefan Monnier
2020-01-07 18:29                         ` martin rudalics
2020-01-07 18:29                         ` martin rudalics
2020-01-07 18:43                           ` Stefan Monnier
2020-01-07 18:43                           ` Stefan Monnier
2020-01-07 18:58                             ` martin rudalics
2020-01-07 18:01                       ` Stefan Monnier
2020-01-07 17:43                     ` Eli Zaretskii
2020-01-06 17:13             ` Pip Cet
2020-01-06 17:25             ` Eli Zaretskii
2020-01-07 23:43             ` Richard Stallman
2020-01-06 17:10       ` Daniel Colascione
2020-03-05  7:14         ` Eli Zaretskii
2020-03-09  2:15           ` Daniel Colascione
2020-03-09  3:26             ` Eli Zaretskii
2021-06-24 16:30               ` bug#32503: 26.1; Byte-compiled functions don't hash consistently Lars Ingebrigtsen
2022-04-28 11:41                 ` bug#38912: 27.0.60; PDumper meets segmentation fault when evil is loaded Lars Ingebrigtsen

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