sympy/sympy — pull request #2930 by akshayah3 (2014-02-18 12:52:08+00:00)
Title: Intersection method of a Line.

Gives wrong result in the following case.
a = Ray(Point(0,0),Point(0,4))
b = Ray(Point(0,1),Point(0,-1))
a.intersection(b)
Ray(Point(0,0),Point(0,4))
But the result should be
Segment(Point(0,0),Point(0,1))