Same as here : mekanism/Mekanism#4011

Was just placing pipes and it looks like one was placed next to an exporter, which causes the world to crash every time I open it
crash-2016-11-24_22.42.12-server.txt

Mekanism uses an old outdated version of multipart. We can't stay behind just because mekanism decided to.

This doesn't even look like an RS issue, but rather Mekanism doing something wrong internally.