Crashing upon joining any 15w47c world (server/non-server)

Anytime I log into a 15w47c world, whether it's a server or my own world offline, I crash with the following error messages:

"error15w47c.txt" attachement

it also has given me an error log, which can also be found in the attachments:

"hs_err_pid22040.log" attachment