Please see Crashy link here - it seems to be complaining about Crockpot: https://crashy.net/C8Fz13VOb2sblwO0fJPc

IllegalArgumentException: bound must be positive
at
java.util.Random.nextInt (Native Method)
at
com.sihenzhang.crockpot.block.CrockPotUnknownCropsBlock.func_225542_b_ (CrockPotUnknownCropsBlock.java:101)

I am on the latest release of Crockpot, v2.1.0, on Forge 36.2.22.

I apologize for not responding to you until now due to my academic commitments.

It seems that the crops list for the Unknown Crops which is defined in the config file is empty. You can try to delete the config file of CrockPot which is located in {minecraft dir}/config and restart the game to see if this will happen or not.

Closing as staled, feel free to comment or reopen.