Bad result from `compute_squared_radius_d_object` on Windows Azure CI

[VincentRouvreau]

Issue Details

I did have wrong result on my CI (on a windows machine in Azure CI).
After investigation, I realized that the problem was coming from compute_squared_radius_d_object, when computing squared radius from 4 points in dimension 4 (CGAL::Epeck_d< CGAL::Dimension_tag<4> >).

The strange part of the bug is that I tried to reproduce it on a windows VM of mine, with the exact same version of dependencies (cf. Environment section), and I do not have the same result. The only thing that differs is the compiler, I do have MSVC/14.38.33130 on my windows VM.

Source Code

#include <CGAL/Epeck_d.h>

#include <vector>
#include <iostream>

// Use static dimension_tag for the user not to be able to set dimension
typedef CGAL::Epeck_d< CGAL::Dimension_tag<4> > Kernel_4;
typedef Kernel_4::Point_d Point_4;
typedef std::vector<Point_4> Vector_4_Points;

int main() {
  // ----------------------------------------------------------------------------
  // Init of a list of points
  // ----------------------------------------------------------------------------
  Vector_4_Points points;
  std::vector<double> coords = { 0.0, 0.0, 0.0, 1.0 };
  points.push_back(Point_4(coords.begin(), coords.end()));
  coords = { 0.0, 0.0, 1.0, 0.0 };
  points.push_back(Point_4(coords.begin(), coords.end()));
  coords = { 0.0, 1.0, 0.0, 0.0 };
  points.push_back(Point_4(coords.begin(), coords.end()));
  coords = { 1.0, 0.0, 0.0, 0.0 };
  points.push_back(Point_4(coords.begin(), coords.end()));

  Kernel_4 k;
  auto f = k.compute_squared_radius_d_object()(points.begin(), points.end());
  
  std::clog << "compute_squared_radius_d_object = " << f << "\n";
}

This code outputs 0.75, except on Azure CI (coming from this PR). Maybe the result is not available for people outside of the project, but I do have:

15: Test command: D:\a\1\s\build\src\Alpha_complex\test\triangulation.exe "--color_output" "--report_level=detailed"
15: Working Directory: D:/a/1/s/build/src/Alpha_complex/test
15: Test timeout computed to be: 10000000
15: compute_squared_radius_d_object = 0

Environment

• Operating system (Windows/Mac/Linux, 32/64 bits):
• Compiler: MSVC 19.44.35222.0
• Release or debug mode: Release
• Specific flags used (if any): /DWIN32 /D_WINDOWS /GR /EHsc /W3 /O2 /Ob2 /DNDEBUG
• CGAL version: 6.1
• Boost version: 1.90.0
• Other libraries versions if used (Eigen, TBB, etc.):
  • Eigen 5.0.1
  • TBB 2022.3.0