Legacy Flowerpots Cause Crash on World Loading in 1.10.1

Loading an world with some pre-entity flowerpots causes an almost instantaneous crash with 1.10.1 the moment enough of the world loads to reach one of the flowerpots. Using MC-Edit to delete the flower pot the crash occured on simply causes it to crash on the next one instead. Reverting to 1.10.0 fixes the issue.