[MC-22732] Game crashes after i get onto a horse, and wont let me go back into that world/server

Put the summary of the bug you're having here

What I expected to happen was...:
Describe what you thought should happen here I should of got onto the horse and NOT CRASHED

What actually happened was...:
Describe what happened here I got on a horse on a server and the game crashed, i tried logging back onto the server and the game crashed before the world loads.

Steps to Reproduce:
1. See Horse
2. ...Get on horse
3. ...Game Crash
4. ... Re launch
5. ..go back into world
6. Repeat 3-5

Environment

OS: Mac OS X (ver 10.7.5, arch x86_64)
Java: 1.6.0_45 (by Apple Inc.)
Launcher: 1.0.8 (bootstrap 4)
Minecraft: 1.6.1 (updated Tue Jul 02 13:27:58 EDT 2013)

Linked issues

duplicates 1

MC-12984 getting a locked chest pushed into your head crashes the game Resolved

Attachments

crash-2013-07-05_18.59.56-client.txt

Comments 3

migrated 2013-07-06T00:12:44Z

Please try reattaching the crash report as a .txt file. Your file is unopenable.

migrated 2013-07-06T00:53:18Z

uploaded another with txt

migrated 2013-07-06T00:55:34Z

Based on a crash report provided in this issue, I believe with high certainty that this report may be a duplicate of MC-22370. You can view all information known about this specific crash at MCX-840.