In Enigmatica Expert 2 Expert mobs sometimes drop tinker's tools so i tried setting up powered anvils to repair them. But it seems once i started adding the tinker's tools to the export bus the game crashed

Describe the bug
Usually the game simply freezes and refuses to close so a shut down of my computer was necessary. Upon opening it again it 'properly' crashed and generated the report which is attached (Downloaded from pastebin)

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To Reproduce
The 'repair room' was located within a compact machine, using an adapter to allow channels through. Exporters were lined up to export into iron chests. When adding tinker tools to the export buses the freezing and crash happened.

Expected behavior
Game freezes and refuses to close, chance of crash when reopening it or freezing again.

Additional context

Environment

• Minecraft Version: 1.12.2
• AE2 Version: appliedenergistics2-rv6-stable-4.jar
• Forge Version: 1.12.2-14.23.5.2768

Duplicate of #3768