Re: libstdc++/3981: error in std_complex.h with complex<long double>

Re: libstdc++/3981: error in std_complex.h with complex<long double>

[gdr]

Synopsis: error in std_complex.h with complex<long double>

Responsible-Changed-From-To: unassigned->gdr
Responsible-Changed-By: gdr
Responsible-Changed-When: Fri Aug 10 14:50:07 2001
Responsible-Changed-Why:
    Mine.
State-Changed-From-To: open->closed
State-Changed-By: gdr
State-Changed-When: Fri Aug 10 14:50:07 2001
State-Changed-Why:
    Fixed on branch and mainline.

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view&pr=3981&database=gcc

libstdc++/3981: error in std_complex.h with complex<long double>

[gunter.winkler]

>Number:         3981
>Category:       libstdc++
>Synopsis:       error in std_complex.h with complex<long double>
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Fri Aug 10 03:06:00 PDT 2001
>Closed-Date:
>Last-Modified:
>Originator:     Gunter Winkler
>Release:        gcc 3.0 libstdc++.so.3
>Organization:
>Environment:
Linux nasarow 2.4.7 #1 Mon Jul 30 21:08:47 MEST 2001 i686 unknown
>Description:
(long double) * std::complex<long double> only multiplies
real part. See complexbug.C 
double works well, long double does not.
>How-To-Repeat:
compile with: gcc complexbug.C -lstdc++
and run:
long double
 x 10 z (1,1) x*z (10,1)
double
 x 10 z (1,1) x*z (10,10)

x*z should always be (10,10)
>Fix:
patch $INCLUDE/bits/std_complex.h with:
*** std_complex.h.orig	Fri Aug 10 11:26:21 2001
--- std_complex.h	Fri Aug 10 11:27:05 2001
***************
*** 930,943 ****
    inline complex<long double>&
    complex<long double>::operator*=(long double __r)
    {
!     __real__ _M_value *= __r;
      return *this;
    }
  
    inline complex<long double>&
    complex<long double>::operator/=(long double __r)
    {
!     __real__ _M_value /= __r;
      return *this;
    }
  
--- 930,943 ----
    inline complex<long double>&
    complex<long double>::operator*=(long double __r)
    {
!     _M_value *= __r;
      return *this;
    }
  
    inline complex<long double>&
    complex<long double>::operator/=(long double __r)
    {
!     _M_value /= __r;
      return *this;
    }
  
>Release-Note:
>Audit-Trail:
>Unformatted:
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