Describe the bug
After starting a large auto-craft for 8 sets of chaos shards, I was kicked with a "Server Closed" error and decided to check my server's logs and got the errors shown under Additional Context. Server crashes on restart as it tries to continue with the craft.

To Reproduce
Started a craft for 8 sets of chaos shards

Expected behavior
To start the craft without crafting

Additional context
Crash after starting autocraft
Crash immediately after server restarted (probably same error)

Environment

• Host: Docker Container (https://hub.docker.com/r/itzg/minecraft-server) on Arch Linux
• Minecraft Version: 1.12.2
• AE2 Version: v38
• Forge Version: 14.23.5.2847

As a hold over, swapping back to v37 and everything seems to be fine.

should be fixed by 4b5bdf9

Gotcha, i'll pull and test with another large craft

Looks good, no more NPE