22ducky22

I had the same crash.

Launcher Version: 1.6.11
Game Version: 1.8.1
Mods: 1.8.1-OptiFine HD U B5

System.getProperty('os.name') == 'Linux'
System.getProperty('os.version') == '3.7.10-antix.5-486-smp'
System.getProperty('os.arch') == 'i386'
System.getProperty('java.version') == '1.8.0_31'
System.getProperty('java.vendor') == 'Oracle Corporation'
System.getProperty('sun.arch.data.model') == '32'