From: Andreas Schwab <schwab@linux-m68k.org>
To: Eli Zaretskii <eliz@gnu.org>
Cc: Po Lu <luangruo@yahoo.com>, emacs-devel@gnu.org
Subject: Re: fsanitize=bounds-strict caught potential error
Date: Sun, 05 Dec 2021 16:15:15 +0100 [thread overview]
Message-ID: <87r1arozgc.fsf@igel.home> (raw)
In-Reply-To: <83wnkj2m21.fsf@gnu.org> (Eli Zaretskii's message of "Sun, 05 Dec 2021 15:55:34 +0200")
On Dez 05 2021, Eli Zaretskii wrote:
>> From: Po Lu <luangruo@yahoo.com>
>> Date: Sun, 05 Dec 2021 21:04:47 +0800
>>
>> I don't know if this message is correct or not, but I got
>>
>> 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.
Andreas.
--
Andreas Schwab, schwab@linux-m68k.org
GPG Key fingerprint = 7578 EB47 D4E5 4D69 2510 2552 DF73 E780 A9DA AEC1
"And now for something completely different."
next prev parent reply other threads:[~2021-12-05 15:15 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 [this message]
2021-12-05 15:23 ` Eli Zaretskii
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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