Intersection gives incorrect result for polygon and line

I have a polygon and line which intersects at the very corner, the intersection result is much larger than it should be. The godbolt repro is here: https://godbolt.org/z/TEEaqvcT1

Polygon(red) and line(green)

Intersection result(blue) goes way outside of the red triangle, down to the bottom left

I don't really care whether the actual result is super accurate or not, I don't need a high level of precision, I just need the result to be somewhat sensible and not creating huge lines outside the boundaries of the polygons I'm using to intersect.