Clinic crashes after using whip to ride Pterosaur

[SIeur_Cookie]

So I just finished raising the Pterosaur grab a whip, right clicked on it got on it and went up then went down and crashed. Now I can't get on to my world, my world is now corrupted, not sure what to do. I don't really want to restart from the beginning. I hope this is fixable.

output-server.log
http://pastebin.com/vheZdJ5V

Console
http://pastebin.com/2J79rWUP

Not sure if this helps, just giving anything I think will help fix this. 

[HalestormXV]

You should post this in the tracker so it can get recognized and sorted as to whether it's a bug or not.