From: Lars Ingebrigtsen <larsi@gnus.org>
To: Eli Zaretskii <eliz@gnu.org>
Cc: 53348@debbugs.gnu.org, "Reingruber,
Richard" <richard.reingruber@sap.com>
Subject: bug#53348: 27.2; Crash in mark_object
Date: Fri, 21 Jan 2022 11:34:25 +0100 [thread overview]
Message-ID: <87h79xtm1a.fsf@gnus.org> (raw)
In-Reply-To: <83a6ftue6w.fsf@gnu.org> (Eli Zaretskii's message of "Tue, 18 Jan 2022 19:49:27 +0200")
Eli Zaretskii <eliz@gnu.org> writes:
> Yes, GC is very recursive, although it shouldn't cause stack overflow
> with "usual" data structure. No, a long list shouldn't cause such
> deep recursion, but a deeply-recursive list or some other recursive
> data structure could, if the depth is unusually large.
In particular, the gc is recursive on the `car' of cons cells. The
following trivial code should segfault Emacs (so don't evaluate it):
(let ((foo (cons 1 1)))
(dotimes (i 1000000)
(setcar foo (cons 1 1))
(setq foo (car foo))))
(garbage-collect)
--
(domestic pets only, the antidote for overdose, milk.)
bloggy blog: http://lars.ingebrigtsen.no
next prev parent reply other threads:[~2022-01-21 10:34 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-01-18 8:35 bug#53348: 27.2; Crash in mark_object Reingruber, Richard via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-01-18 16:53 ` Eli Zaretskii
2022-01-18 17:07 ` Reingruber, Richard via Bug reports for GNU Emacs, the Swiss army knife of text editors
2022-01-18 17:49 ` Eli Zaretskii
2022-01-21 10:34 ` Lars Ingebrigtsen [this message]
2022-01-21 10:36 ` Lars Ingebrigtsen
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