Keep Collinear does not work

[loadship]

hi@AngusJohnson，This is my test code, closed path, collinearity is not generated

Clipper2Lib::Paths64 buildRectShellPath(const Clipper2Lib::Rect64& rect, int64_t offset)
{
int64_t left = rect.left;
int64_t right = rect.right;
int64_t top = rect.top;
int64_t bottom = rect.bottom;

int64_t L = left - offset;
int64_t R = right + offset;
int64_t T = top - offset;
int64_t B = bottom + offset;

Clipper2Lib::Path64 outerContour, innerContour;

outerContour.emplace_back(L, T);  
outerContour.emplace_back(R, T);  
outerContour.emplace_back(R, B); 
outerContour.emplace_back(L, B); 

innerContour.emplace_back(left, bottom); 
innerContour.emplace_back(right, bottom);
innerContour.emplace_back(right, top);  
innerContour.emplace_back(left, top);  

return Clipper2Lib::Paths64 { outerContour, innerContour}; 

}

void test()
{
Clipper2Lib::Rect64 rect;
rect.left = -200;
rect.right = 200;
rect.top = -150;
rect.bottom = 150;
rect.Scale(1000);

Clipper2Lib::Rect64 rect1;
rect1.left = -200;
rect1.right = 0;
rect1.top = -150;
rect1.bottom = 0;
rect.Scale(1000);

Clipper2Lib::Paths64 sharedEdgeArea = buildRectShellPath(rect, 1);

Clipper2Lib::Paths64 rect1Paths = { rect1.AsPath() };

Clipper2Lib::Paths64 result;
Clipper2Lib::Clipper64 clipper;
clipper.AddSubject(rect1Paths);
clipper.AddClip(sharedEdgeArea);
clipper.PreserveCollinear(true);
clipper.Execute(Clipper2Lib::ClipType::Intersection, Clipper2Lib::FillRule::NonZero, result);

if (result.empty())
{
    qInfo() << "empty()";
}

}

[loadship]

I used the wrong interface. This can be used

bool Execute(ClipType clip_type, FillRule fill_rule, Paths64& closed_paths, Paths64& open_paths)
{
closed_paths.clear();
open_paths.clear();
if (ExecuteInternal(clip_type, fill_rule, false))
BuildPaths64(closed_paths, &open_paths);
CleanUp();
return succeeded_;
}