Minecraft: 1.12.2
Forge: 14.23.5.2855

Mods: 2
jei_1.12.2-4.16.1.302
Metallurgy-4-Reforged-1.3.0-beta.2

Crash:
crash-2021-12-09_02.02.17-server.txt

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The Shadow Iron Armor set grants "Broken Evasion", which allows you to 'dodge' damage at the cost of durability. The armor itself works fine but... if you have it on a Tartarite Armor Set... some weird things happen.

1. The game crashes when you 'dodge' an attack from a non-entity, such as touching some cacti. Not all non-entity sources will crash the game, though... such as Fall Damage.

2. The attacking entity will disappear without a trace when the set effect procs, as if the armor absorbed the entity.