Minecraft Version

1.12.2

Forge Version

14.23..5.2847

Mod Version

1.12.2-0.11.8-380

Describe your problem, including steps to reproduce it

When loading the minigun, middle-clicking ammo in the player's inventory causes the game to crash and the world to become permanently corrupted. Creative mode, using (Ice/Freeze?) Ammo.

Any other comments?

Two crash reports attached. The first one occurred when middle-clicking the ammo, second one occurred when trying to rejoin the world
first-crash.txt
second-crash.txt

Build 381 from https://jenkins.k-4u.nl/job/PneumaticCraft-Repressurized/ should fix your problem, can you try that please?

And don't worry, your world is not "permanently corrupted". You just have a piece of bad NBT on the minigun item, that's all. The new build will check for that and clean it up (and prevent it from re-occurring).

I'd deleted the world as I didn't have much built on it, but by recreating the bug and then updating, it seems to work perfectly again. Thanks!

Fixed in 0.11.9 release.