From: Stefan Monnier via "Bug reports for GNU Emacs, the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>
To: "Gerd Möllmann" <gerd.moellmann@gmail.com>
Cc: Lars Ingebrigtsen <larsi@gnus.org>,
Lars Tveito <larstvei@ifi.uio.no>,
57957@debbugs.gnu.org, Andrea Corallo <akrl@sdf.org>
Subject: bug#57957: 29.0.50; Native compilation hangs on cyclic lists
Date: Thu, 22 Sep 2022 13:10:09 -0400 [thread overview]
Message-ID: <jwvzger1gpb.fsf-monnier+emacs@gnu.org> (raw)
In-Reply-To: <m2y1ubgy5b.fsf@Mini.fritz.box> ("Gerd Möllmann"'s message of "Thu, 22 Sep 2022 18:41:04 +0200")
> The question is of course also how much effort circular lists deserve in
> the compiler. From my point of view, not too much because they aren't
> very useful, in code at least. And dealing with them costs runtime.
Circular data structures are perfectly normal in source code under
a `quote` but the code itself should never be cyclic (so I think it
would be OK to signal an error (and/or to inf-loop) when asked to
compile a chunk of code that has a cycle). So we *should* handle
circular data structures correctly.
Note: I don't know why we'd need/want to do a `subst-if` inside
a `quote` and haven't looked at this bug or at the `comp.el` code to
know what we're really talking about.
Stefan
next prev parent reply other threads:[~2022-09-22 17:10 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-20 7:55 bug#57957: 29.0.50; Native compilation hangs on cyclic lists Lars Tveito
2022-09-20 15:33 ` Lars Ingebrigtsen
2022-09-21 19:18 ` Andrea Corallo
2022-09-22 11:15 ` Lars Ingebrigtsen
2022-09-22 12:06 ` Gerd Möllmann
2022-09-22 16:07 ` Andrea Corallo
2022-09-22 16:41 ` Gerd Möllmann
2022-09-22 17:10 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors [this message]
2022-09-22 22:39 ` Andrea Corallo
2024-03-24 11:26 ` bug#57957: bug#69872: 29.2; Async native compilation of seq.el test uses up resources and hangs Andrea Corallo
2024-04-01 20:46 ` Andrea Corallo
2022-09-25 10:02 ` bug#57957: 29.0.50; Native compilation hangs on cyclic lists Basil L. Contovounesios via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-09-22 14:25 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
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