Put the summary of the bug you're having here
What I expected to happen was...:
minecraft to work and open the map i downloaded
What actually happened was...:
it gave me this report http://pastebin.com/MunYpfWp
Steps to Reproduce:
1. Put a step by step guide on how to trigger the bug here
2. open minecraft
Environment
OS: Mac OS X (ver 10.7.5, arch x86_64)
Java: 1.8.0_25 (by Oracle Corporation)
Launcher: Minecraft Launcher 1.5.3 (bootstrap 5)
Minecraft: 1.7.2 (updated Wed Apr 02 05:00:00 CDT 2014)
Maybe that map is corrupted.