Hey there guys; In my Minecraft world running Forge version 28.2.3 with just a few other mods (full mod list is attached to this post), I placed down a millstone attached to a water wheel yesterday, and now when I try to load up the world, it crashes as soon as the chunk with the millstone is loaded.

Setting the render distance to 2 chunks and walking away confirms that it's something related to the millstone specifically. None of the other Create related machines seem to cause this crash (i.e, Water Wheel, linear chassis, mechanical pistons in the same world).

I tested the millstone on a superflat creative world, and as soon as the millstone is placed down there with a water wheel actively powering it, the crashes as well.

3 of the relevant crash logs are attached to this post.
Initial Survival World Crash
Walk into chunk w/ watermill test
Fresh Superflat world test

Mod List:

Crash Screen for superflat world:

I initially thought that this might have, somehow, been a bug related to Journeymap or JEI, since there are known rendering issues with certain versions of Buildcraft. However, the crash still occurs after removing these mods.

Removing every mod other than Create yields no more crashing. After enabling every mod one by one and testing it on the superflat world (Journeymap, then JEI, HWYLA, Immersive Engineering, and finally Immersive Railroading and TrackAPI) leads me to learn that it is definitely an issue with Immersive Railroading, as it instantly crashes then.

However, it seems more like the custom resource packs seem to dictate whether or not the game crashes upon loading a chunk with a millstone. I tried removing the Heavy Industrial 1.6.7.0 resource pack for Immersive Railroading and I did not see any more crashes afterwards.

Duplicate of #166