TypeError: Cannot read property '0' of undefined

[renambot]

Sorry to re-open an old issue. It happens often in my code.
I had to add a try/catch to try and resolve it (picking corners of the boxes)

For instance:

getBoxToBoxArrow( 1505567, 1501081, 600, 400, 1506577, 1501418, 600, 400,
 {bow: 0.1, padStart: 20, padEnd: 40, stretch: 0.5, stretchMin: 40, stretchMax: 300}
 )

[renambot]

Also, if I put padStart and padEnd to zero, it seems to work. I believe the roundRect-ray intersection might be the problem.