http://pastebin.com/bZvjkMgJ

no crash

[12:16:08] [Server thread/ERROR]: Couldn't load loot table abyssalcraft:chests/mineshaft from jar:file:/C:/Users/gobas/Desktop/Server%20Local%20Backup%206-26-16/mods/AbyssalCraft-1.9.4-1.9.2.1.jar!/assets/abyssalcraft/loot_tables/chests/mineshaft.json
com.google.gson.JsonParseException: Loot Table "abyssalcraft:chests/mineshaft" Duplicate entry name "minecraft:diamond" for pool #-1 entry #4
at net.minecraftforge.common.ForgeHooks$LootTableContext.validateEntryName(ForgeHooks.java:1067) ~[ForgeHooks$LootTableContext.class:?]

Apparently there's two diamond entries in the Dreadlands Mineshaft loot table.

on my end or yours? owo

On my end. It seems I've left two entries in the loot table for diamonds, and this is the first time the game nags about just that.

lol, alrighty.