General Info

• I am running a modpack
• I can reproduce this issue consistently
  • In single player
  • In multiplayer (presumably, considering it's an integrated server crash in singleplayer)
• I have searched for this issue previously and it was either (1) not previously reported, or (2) previously fixed and I'm having the same problem.
• [~] I am crashing and can provide my crash report (It is not a full-game crash, the integrated server just dies, kicking you out to the multiplayer "sever selection" screen)
• I am using the latest version of the mod

Client Info

• Minecraft Version: 1.12.2

• Forge Version: 14.23.5.2836

• Mod Version: 1.0.5

• Java Version: 1.8

Issue Description

Placing a tnt slab in the same block as a furnace slab crashes; furnace slab cannot be placed in the same block as an already-placed tnt slab.

Reproduce Steps

Place a furnace slab
Place a tnt slab in the other half of the block
or vice versa

https://hastebin.com/nopinehezu.css

Additional Information

Optifine is present, however I doubt that is the issue here.

The issue seems to be a missing mapping for the furnace slab

Can I get a list of installed mods?

As I'm unable to reproduce it with just McMultipart and SlabMachines

i can also produce this crash by placing a slab furnace on another slab furnace other mods are also currently present not sure if its the same issue having same missing mapping issue tho

crash-2019-06-13_16.52.54-server.txt