From: Bruno Haible <bruno@clisp.org>
To: noloader@gmail.com
Cc: bug-gnulib@gnu.org
Subject: Re: test-math.c:89:3: runtime error: division by zero
Date: Sun, 29 Mar 2020 23:59:20 +0200 [thread overview]
Message-ID: <1665625.n3MASsG4Sn@omega> (raw)
In-Reply-To: <CAH8yC8nAOtw1f+M3Mn4_5kGG=zV7s2CwuTXR94sA3NFu45Asew@mail.gmail.com>
Jeffrey Walton wrote:
> Let's see what the GCC folks recommend: "GCC and division by 0 under
> sanitizers", https://gcc.gnu.org/pipermail/gcc-help/2020-March/138746.html.
The way I interpret their answer
https://gcc.gnu.org/pipermail/gcc-help/2020-March/138747.html
is:
1) You need to distinguish integer division by zero and floating-point
division by zero.
2) For floating-point division by zero GCC warns but should not warn.
You should enter a bug report about this.
3) The undefined-behaviour sanitizer should report integer division by zero
but not floating-point division by zero ("as it can be a legitimate way
of obtaining infinities and NaNs").
In the gnulib code, test-math.c:89, we clearly have a floating-point
division by zero.
Bruno
next prev parent reply other threads:[~2020-03-29 21:59 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-29 13:32 test-math.c:89:3: runtime error: division by zero Jeffrey Walton
2020-03-29 16:24 ` Bruno Haible
2020-03-29 21:09 ` Jeffrey Walton
2020-03-29 21:59 ` Bruno Haible [this message]
2020-03-29 23:21 ` Jeffrey Walton
2020-03-29 23:30 ` Jeffrey Walton
2020-03-29 23:35 ` Paul Eggert
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