Issue description:

Attempting to place a Chisels & Bits (MCMultiPart) cover onto a Mekanism gas pipe instantly crashes the game. Mousing over the pipe while holding a cover will also crash.

Interestingly, it does still place the cover; once you load up the game the cover will be in place and working normally.

In some cases, a crash while looking at a pipe will lock you out of a world, as when you load in you'll still be looking at the pipe and you will instantly crash again.

Steps to reproduce:

Tested only in singleplayer.

1. Place Mekanism gas pipe (untested with other pipes)
2. Craft a Chisel & Bits cover using a Diamond Saw (tested only with thinnest panel made of obsidian)
3. Place onto or look at gas pipe while holding the cover.

Version (make sure you are on the latest version before reporting):

Forge: 14.23.0.2512
Mekanism: 9.4.1.326
Other relevant version: Chisel & Bits 0.0.14.18, MCMultiPart 2.3.3

If a (crash)log is relevant for this issue, link it here: (It's almost always relevant)

Placement crash log: https://pastebin.com/gaJh8eQa
Mouseover crash log: https://pastebin.com/ThbcuvZC

No, it is a very different cause.

It's possible this is entirely coincidental and unrelated, but part of your described crash sounds kind of similar to the crash I was running into with Tinkers. No effect on the server, crash occurs when moving/placing the problematic item, and game works okay with item in place after restarting. #4798. From your mod versions and crashlogs, it sounds like there it a good chance that you may also have been running All the Mods 3.

Buggy123, is there any chance you could test to see if editing config/forge.cfg and setting B:alwaysSetupTerrainOffThread=false fixes your crash? Sorry if this is unrelated, but if this is a broader issue affecting a few sorts of things, then that would be nice to confirm.

both are C&B issues. Please report to them