Okay, I had just used the alloy smelter to make Invar ingots, and they smelted fine, but when I took them out of the alloy smelter, the game crashed. Also, I noticed that the background for the alloy smelting gui is pink, as if it's a missing texture (which may or may not be related).

I'm playing on 1.10.2 with a few other technical mods that make use of invar, including Thermal Foundation, Mekanism, and Tinker's Construct. The error report is attached below.
crash-2017-07-22_09.57.17-client.txt

Wow, this bug must have been here since 1.11. I know that few people use the Fun Ores machines, but that's a bit sad. Thanks for reporting this, should be an easy fix.

Awesome, thanks!