Mekanism 9.4.13.349
Nuclearcraft 2.11b

When Nuclearcraft is installed, Mekanism machines lack proper tooltips, and crash when hovering over them in inventories (no crash in jei or in world with walia). These items instead say to check the logs, which look like this when hovering over items:
https://hastebin.com/uhaboyivok.rb

Here's the crashlog it gives when hovering over an item:
https://paste.dimdev.org/ohugaqerej.mccrash

And here's the full log if needed:
https://goo.gl/WZbK4B

Fixed in version 2.11c - at least, I think so :)

Already fixed for the next version :)