opened
alvinsohwj
username_0
![image](https://user-images.githubusercontent.com/45927037/58300958-3a5c8400-7e17-11e9-9be7-bb349538eaad.png)
![image](https://user-images.githubusercontent.com/45927037/58300961-40eafb80-7e17-11e9-90b2-5ecd074d583b.png)
Error should be thrown when NaN is used for make.Position
issue