Bug#47784: marked as done (Log doesn't honour NaN on log(-8))
Your message dated Tue, 4 Apr 2000 09:36:29 -0400 (EDT)
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and subject line Log now works correctly...
has caused the attached Bug report to be marked as done.
This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.
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Darren Benham
(administrator, Debian Bugs database)
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Date: Tue, 19 Oct 1999 12:57:03 +0200
From: Bart Warmerdam <bartw@xs4all.nl>
To: submit@bugs.debian.org
Subject: Log doesn't honour NaN on log(-8)
Message-ID: <19991019125703.A18073@xs4all.nl>
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Package: libc6.1
Version: 2.1.2-5
The log() function doesn't give the right answer on negative log values. E.g.
log(-8), as used in the testcase of mawk, returns 0.00000 while it should be
NaN.
Example attached.
Thanks,
B.
--
B. Warmerdam GNU/Debian Linux
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Content-Disposition: attachment; filename="log.c"
#include <stdio.h>
#include <math.h>
int main()
{
printf("%f\n", log(-8));
exit(0);
}
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Date: Tue, 4 Apr 2000 09:36:29 -0400 (EDT)
From: "Christopher C. Chimelis" <chris@debian.org>
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To: 47784-done@bugs.debian.org
Subject: Log now works correctly...
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I just tested 2.1.3-7 and the example programme that you sent with the bug
report now returns "nan" as it should. I'll test 2.1.3-8 when it's done
compiling, but I expect the same results since no changes to the math libs
have been made that I can find.
C
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