While playing with Open Modular Turrets and FoamFix on Minecraft 1.12.2 (Forge Mod Loader), I ran into OpenModularTurretsTeam/OMLib#10 , but as it mentions FoamFix (might be related to #80 in that it's a "Tesselating block model" error) I'm logging it here as well.

First crash killed both clients connected and the server:
crash-2018-01-06_14.18.33-client.txt

Second crash is when clients try to reconnect after restarting the server:
crash-2018-01-06_14.24.01-client.txt

Minecraft: 1.12.2
Forge Mod Loader: 14.23.1.2582
Foam Fix: 0.8.3-1.12.2-anarchy
Open Modular Lib: 1.12.2-3.0.0-133
Open Modular Turrets: 1.12.2-3.0.0-230

If I remove FoamFix, I get this error, so I don't think this is a FoamFix issue:
crash-2018-01-06_14.43.08-client.txt