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c/10844: Wrong computation on nan initialized vectors.
- From: szegedy at or dot uni-bonn dot de
- To: gcc-gnats at gcc dot gnu dot org
- Date: 18 May 2003 17:20:58 -0000
- Subject: c/10844: Wrong computation on nan initialized vectors.
- Reply-to: szegedy at or dot uni-bonn dot de
>Number: 10844
>Category: c
>Synopsis: Wrong computation on nan initialized vectors.
>Confidential: no
>Severity: serious
>Priority: medium
>Responsible: unassigned
>State: open
>Class: wrong-code
>Submitter-Id: net
>Arrival-Date: Sun May 18 17:26:00 UTC 2003
>Closed-Date:
>Last-Modified:
>Originator: Christian Szegedy
>Release: gcc (GCC) 3.2.2
>Organization:
>Environment:
gentoo Linux
>Description:
The following program outputs nan istead of 0:
#include <math.h>
int main()
{
int n = 10;
int i;
double *w= (double*)malloc(sizeof(double)*n);
double x;
for( i=0 ; i<n ; i++ ) { w[i] = nan(""); }
w[0] = .0;
w[0] += .0;
printf("%lg\n",w[0]);
return 0;
}
>How-To-Repeat:
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted: