Your message dated Fri, 18 Dec 2015 19:02:38 +0100
with message-id <[email protected]>
and subject line Re: Bug#578316: libc6: tanh(50000+50000i) gives invalid result
has caused the Debian Bug report #578316,
regarding libc6: tanh(50000+50000i) gives invalid result
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.
(NB: If you are a system administrator and have no idea what this
message is talking about, this may indicate a serious mail system
misconfiguration somewhere. Please contact [email protected]
immediately.)
--
578316: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=578316
Debian Bug Tracking System
Contact [email protected] with problems
--- Begin Message ---
Package: libc6
Version: 2.10.2-6
Severity: normal
Hi,
the value of tanh(50000 + 50000I) should be (close to) (1,0). However,
with the attached file trig.cc, I get
libc version 2.10.2
arg (50000,50000)
sinh(arg) (-inf,-inf)
cosh(arg) (-inf,-inf)
s/c (nan,nan)
tanh(arg) (nan,0)
This came up on the GNU Octave list, see
http://www-old.cae.wisc.edu/pipermail/help-octave/2010-April/019226.html
I also tried 2.11 from experimental, same problem.
Thanks
Thomas
-- System Information:
Debian Release: squeeze/sid
APT prefers unstable
APT policy: (500, 'unstable'), (1, 'experimental')
Architecture: amd64 (x86_64)
Kernel: Linux 2.6.26-2-amd64 (SMP w/2 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Versions of packages libc6 depends on:
ii libc-bin 2.10.2-6 Embedded GNU C Library: Binaries
ii libgcc1 1:4.4.3-7 GCC support library
libc6 recommends no packages.
Versions of packages libc6 suggests:
ii debconf [debconf-2.0] 1.5.32 Debian configuration management sy
pn glibc-doc <none> (no description available)
ii locales 2.10.2-6 Embedded GNU C Library: National L
-- debconf information excluded
// trig.cc
#include <iostream>
#include <complex>
#include <gnu/libc-version.h>
using namespace std;
int main(int argc, char **argv) {
complex<double> arg(50000,50000);
complex<double> s,c,r,t;
s=sinh(arg);
c=cosh(arg);
r=s/c;
t=tanh(arg);
cout << "libc version " << gnu_get_libc_version() << endl;
cout << "arg " << arg << endl;
cout << "sinh(arg) " << s << endl;
cout << "cosh(arg) " << c << endl;
cout << "s/c " << r << endl;
cout << "tanh(arg) " << t << endl;
return 0;
}
--- End Message ---
--- Begin Message ---
Version: 2.16-0experimental0
On 2010-04-18 22:44, Thomas Weber wrote:
> Package: libc6
> Version: 2.10.2-6
> Severity: normal
>
> Hi,
>
> the value of tanh(50000 + 50000I) should be (close to) (1,0). However,
> with the attached file trig.cc, I get
>
> libc version 2.10.2
> arg (50000,50000)
> sinh(arg) (-inf,-inf)
> cosh(arg) (-inf,-inf)
> s/c (nan,nan)
> tanh(arg) (nan,0)
>
> This came up on the GNU Octave list, see
> http://www-old.cae.wisc.edu/pipermail/help-octave/2010-April/019226.html
>
> I also tried 2.11 from experimental, same problem.
This bug has been fixed upstream in glibc 2.16. I am therefore closing
the bug.
--
Aurelien Jarno GPG: 4096R/1DDD8C9B
[email protected] http://www.aurel32.net
--- End Message ---
