My world crashes when i get on it. What can i do?

Please attach the crash report.

And please review the guidelines before reporting issues - "Help!" is a useless summary.

Please do not mark issues as private, unless your bug report is a security issue containing information that may compromise your server/client.

Did you may use a Mod earlier?
This is may a thing that should happenend.
There was also a bug with TMI that spawners and snow crashes your map when deinstalled TMI
Can you give us any tips from what mods you used ever in that map orso?

Here is the Crash report.

Duplicate of MC-3489.

Relinked to MC-11839