BezierPathIntersectionException mismatched intersection length

[ntoichkina]

Hi, I try to calculate the difference of two bezier paths (spline lines which is closed by first and last point in y == 0), and I get the error mismatched intersection length, what can go wrong? and some differences are not found.

[adamwulf]

Could you add a test and send a PR? It's hard to know what the issue might be without the exact paths causing the problem. thanks!