🚀 go-pugleaf

Last Saturday I upgraded to Debian 2.0, and therefore to 
egcs 1.0.3's c++ ---  I used gcc 2.8.0 before --- 
but now I've got a problem with my recompiled (c++) numbercrunching program!

It gives a SYSSEGV on the line
  dz= pow(tolerance,0.25)/(pow(xnl+xlin,0.6)*pow(xnl*xlin,0.2));
where dz, tolerance, xnl and xlin are local variables.

the SIGSEGV occurs in /usr/include/__math.h , in pow:

pow (double __x, double __y)
{
  register double __value, __exponent;
  long long int __p = (long long int) __y;

  if (__x == 0.0 && __y > 0.0)
    return 0.0;
  if (__y == (double) __p)                     <== SIGSEGV here!

What's even worse, the SYSSEGV occurs on a different line depending
on the amount of diagnostics: 

  cout << "xlin = " << xlin << endl;
  double t1 =  pow(tolerance,0.25);
  cout << "t1 = " << t1 <<endl;
  double t2 = pow(xnl+xlin,0.6);
  cout << "t2 = " << t2 <<endl;
  cout << "xnl * xlin = " << xnl * xlin <<endl; // 1
  double t3 = pow(xnl*xlin,0.2);  //2
  cout << "t3 = " << t3 <<endl;
  dz= pow(tolerance,0.25)/(pow(xnl+xlin,0.6)*pow(xnl*xlin,0.2)); //3
  cout << "further .. " <<endl;;

whith line 1,  it crashes on line 3; without line 1, with
line 1 commented out, the crash occurs in line 2!

Does anyone have an idea what could be wrong?

-- 
Jeroen Nijhof      J.H.B.Nijhof@aston.ac.uk 
Accordion Links    http://www-th.phys.rug.nl/~nijhof/accordions.html