From: Eli Zaretskii <eliz@gnu.org>
To: Andreas Schwab <schwab@linux-m68k.org>
Cc: luangruo@yahoo.com, emacs-devel@gnu.org
Subject: Re: fsanitize=bounds-strict caught potential error
Date: Sun, 05 Dec 2021 17:23:30 +0200 [thread overview]
Message-ID: <83r1ar2hzh.fsf@gnu.org> (raw)
In-Reply-To: <87r1arozgc.fsf@igel.home> (message from Andreas Schwab on Sun, 05 Dec 2021 16:15:15 +0100)
> From: Andreas Schwab <schwab@linux-m68k.org>
> Cc: Po Lu <luangruo@yahoo.com>, emacs-devel@gnu.org
> Date: Sun, 05 Dec 2021 16:15:15 +0100
>
> >> xdisp.c:30394:37: runtime error: index -1 out of bounds for type 'iterator_stack_entry [5]'
> >
> > The compiler doesn't know enough to realize that this code can never
> > be executed with it->sp < 1. This code is there since 2003, and never
> > gave us any trouble.
>
> It is a runtime error, thus the erroneous access is actually being
> executed.
Then let's put an assertion there and find the culprit. Maybe it's
the min-width feature, which is new on master.
next prev parent reply other threads:[~2021-12-05 15:23 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <87o85vp5hs.fsf.ref@yahoo.com>
2021-12-05 13:04 ` fsanitize=bounds-strict caught potential error Po Lu
2021-12-05 13:55 ` Eli Zaretskii
2021-12-05 15:15 ` Andreas Schwab
2021-12-05 15:23 ` Eli Zaretskii [this message]
2021-12-05 15:36 ` Eli Zaretskii
2021-12-05 15:24 ` Andreas Schwab
2021-12-05 15:35 ` Andreas Schwab
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