Playing FTB Evolution. Crash log: https://pastebin.com/Vid89qXr

Seemingly the crash happened on RS's cable block, but I don't think it is the culprit as code ultimately flows into aforementioned method and has little to do with this specific crash at that point.

What puzzles me is that the the crash seems impossible to occur. Probably some race condition stuff I do not know about (can ObjectArrayList just return null???) or reflection voodoo gone wrong, if I have to guess, but I figured I'd report it anyway for the sake of documentation.