I have had problems with a mod, it seems that Chisel is what is causing the crash, i have provided a log.

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EDIT: I fixed the crash, but now i cant open my inventory, and if i do, the game crashes.

Please give them the log that shows the crash for when you open your inventory.

....Where's the crash log?

Sorry for the wait, i had previously resolved the issue, but now i can't get into any of my worlds before the game crashes Log: http://pastebin.com/LNucihYe

Edit: It looks like it was compat problems between Jei and another mod i have, sorry for the wait.