game crashing. please help

crash report : attached
error code : The game crashed whilst unexpected error
Error: java.nio.BufferUnderflowException
list of mods : attacked
latest-log : attached
shader i was using while playing = nostalgiavx (was getting around 40 fps)

Edit more information : game randomly crashes 10-15 minutes into the gameplay. i have tried using more/less ram. that didnt fix it :(.