I keep crashing on startup and don't know why

crash-2019-04-07_22.53.47-client.txt

Do you have a mod that changes the vanilla furnace?
Because thats the issue. The Vanilla Minecraft Furnace lost its ItemBlock and can no longer be used in crafting recipes. Thats why it is happening.
Not an issue of ic2c since i can not fix that without making the mod unplayable.

I removed fast furnace and still crashing

crash-2019-04-08_11.45.33-client.txt

I have the Fast Furnace mod installed. I will check to see if that was the problem when I get home

I got it to load without crashing. idk what mod it was but it is working now

ok, i have no idea which mod causes the furnace to have no itemblock.

I will try to find what mod it is tonight and let you know and also report the issue that that mod's github

Completely unable to find the mod causing the crash. no idea why. am completely baffled

good to know.