This scenario is unsolvable with the given motion primitives because the initial velocity is to high
Hi schenkd,
Thank you for reporting this.
This is in fact a problem we have noticed and should have been addressed before the announcement of exercise. It might be mistakenly kept in the current repository and we might update it later on.
BTW, I didn’t see the error in a most-recent test run, which is weird. However, though it is faulty, it still is counted as success as I remember. So it might not affect the result of your implementation much. But thank you for pointing out this anyway 
Best,
Mingxuan