Incorrect result on special paths.

[TianLong1989]

Hi, I set two paths as follows.
let path = UIBezierPath()
path.move(to: CGPoint(x: 445, y: 359))
path.addCurve(to: CGPoint(x: 381, y: 423), controlPoint1: CGPoint(x: 445, y: 394.3462239872), controlPoint2: CGPoint(x: 416.3462239872, y: 423))
path.addCurve(to: CGPoint(x: 317, y: 359), controlPoint1: CGPoint(x: 345.6537760128, y: 423), controlPoint2: CGPoint(x: 317, y: 394.3462239872))
path.addCurve(to: CGPoint(x: 381, y: 295), controlPoint1: CGPoint(x: 317, y: 323.6537760128), controlPoint2: CGPoint(x: 345.6537760128, y: 295))
path.addCurve(to: CGPoint(x: 445, y: 359), controlPoint1: CGPoint(x: 416.3462239872, y: 295), controlPoint2: CGPoint(x: 445, y: 323.6537760128))
path.close()

let path1 = UIBezierPath()
path1.move(to: CGPoint(x: 396.188153789188, y: 421.1869913808138))
path1.addCurve(to: CGPoint(x: 354, y: 361), controlPoint1: CGPoint(x: 371.580991406671, y: 412.2674684341148), controlPoint2: CGPoint(x: 354, y: 388.6868644969018))
path1.addCurve(to: CGPoint(x: 402.8118787893286, y: 298.813008615249), controlPoint1: CGPoint(x: 354, y: 330.8869397620923), controlPoint2: CGPoint(x: 374.7972348964752, y: 305.6313340004763))
path1.addCurve(to: CGPoint(x: 445, y: 359), controlPoint1: CGPoint(x: 427.419008593329, y: 307.7325315658853), controlPoint2: CGPoint(x: 445, y: 331.3131355030982))
path1.addCurve(to: CGPoint(x: 396.1881212105952, y: 421.1869913847696), controlPoint1: CGPoint(x: 445, y: 389.113060237935), controlPoint2: CGPoint(x: 424.2027651034871, y: 414.3686659995695))
path1.close()

And then I tried to get 'union', 'intersect' of these two paths.
Results are not correct.


'Union' result should be 'full circle'...
Anyone can fix this bug?
Thanks