From: Alan Mackenzie <acm@muc.de>
To: Stefan Monnier <monnier@iro.umontreal.ca>
Cc: 65051@debbugs.gnu.org
Subject: bug#65051: internal_equal manipulates symbols with position without checking symbols-with-pos-enabled.
Date: Mon, 7 Aug 2023 09:20:25 +0000 [thread overview]
Message-ID: <ZNC3WVXvQzGa3L0R@ACM> (raw)
In-Reply-To: <jwv8ranzg0t.fsf-monnier+emacs@gnu.org>
Hello, Stefan.
On Sun, Aug 06, 2023 at 23:30:15 -0400, Stefan Monnier wrote:
> > at the top level of the function. Thus
> > (equal 'foo #<symbol foo at 42>)
> > will return non-nil, regardless of the setting of
> > `symbols-with-pos-enabled`. It should return non-nil only when that
> > flag variable is non-nil. This is a bug.
> Could you explain why you think it's a bug?
When symbols-with-pos-enabled is non-nil, the two arguments to that
equal call are equal. That is the point of s-w-p-e.
When s-w-p-e is nil, and the "magic" is thus switched off, the two lisp
objects have different type (the first is a symbol, the second is a
pseudovector), thus cannot be equal.
I think the amendments I've proposed for the elisp manual page "Symbols
with Position" are now clearer about this sort of thing.
> Stefan
--
Alan Mackenzie (Nuremberg, Germany).
next prev parent reply other threads:[~2023-08-07 9:20 UTC|newest]
Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-08-04 14:00 bug#65051: internal_equal manipulates symbols with position without checking symbols-with-pos-enabled Alan Mackenzie
2023-08-04 14:32 ` Eli Zaretskii
2023-08-04 14:59 ` Alan Mackenzie
2023-08-04 15:27 ` Eli Zaretskii
2023-08-04 17:06 ` Alan Mackenzie
2023-08-04 18:01 ` Eli Zaretskii
2023-08-05 10:45 ` Alan Mackenzie
2023-08-05 10:57 ` Eli Zaretskii
2023-08-05 11:52 ` Alan Mackenzie
2023-08-05 12:13 ` Eli Zaretskii
2023-08-05 13:04 ` Alan Mackenzie
2023-08-05 13:13 ` Eli Zaretskii
2023-08-13 16:14 ` Alan Mackenzie
2023-08-05 14:40 ` Mattias Engdegård
2023-08-05 16:59 ` Alan Mackenzie
2023-08-05 17:02 ` Mattias Engdegård
2023-08-05 21:07 ` Alan Mackenzie
2023-08-06 13:37 ` Mattias Engdegård
2023-08-06 15:02 ` Alan Mackenzie
2023-08-07 8:58 ` Mattias Engdegård
2023-08-07 9:44 ` Alan Mackenzie
2023-08-09 18:45 ` Mattias Engdegård
2023-08-07 3:30 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-08-07 9:20 ` Alan Mackenzie [this message]
2023-08-08 2:56 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-08-08 15:33 ` Alan Mackenzie
2023-08-10 3:28 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-08-10 9:14 ` Alan Mackenzie
2023-08-10 14:28 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-08-10 18:35 ` Alan Mackenzie
2023-08-12 5:36 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-08-12 6:10 ` Eli Zaretskii
2023-08-12 18:46 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-08-12 19:10 ` Eli Zaretskii
2023-08-13 15:27 ` Alan Mackenzie
2023-08-12 10:41 ` Alan Mackenzie
2023-08-12 18:07 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-08-13 13:52 ` Alan Mackenzie
2023-08-12 21:59 ` Alan Mackenzie
2023-08-11 0:51 ` Dmitry Gutov
2023-08-11 10:42 ` Alan Mackenzie
2023-08-11 11:18 ` Dmitry Gutov
2023-08-11 12:05 ` Alan Mackenzie
2023-08-11 13:19 ` Dmitry Gutov
2023-08-11 14:04 ` Alan Mackenzie
2023-08-11 18:15 ` Dmitry Gutov
[not found] ` <handler.65051.B.169115764532326.ack@debbugs.gnu.org>
2023-09-04 12:57 ` bug#65051: Acknowledgement (internal_equal manipulates symbols with position without checking symbols-with-pos-enabled.) Alan Mackenzie
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