Talk:TIE/x7/@comment-454133-20170307234617/@comment-109.173.159.55-20170308135630

FAQ for "Advanced Slam" upgrade card resolves that question:

"Overlapping an obstacle occurs when the maneuver template or the ship's final position overlaps an obstacle. Overlapping a ship occurs when the ship's final position would overlap a ship"

That means that if the maneuver template overlapped the obstacle, then you did overlap the obstacle, so you may not perform the free evade action.