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Crashing When Near Deerclops

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I'm making a character mod where bosses like deerclops wont aggro the character unless it is hit (Kinda useless I know but thought itd still be neat to have). However, every time I spawn deerclops the game crashes. It says there's a nil value somewhere but I'm not sure how to fix it? Here is the warning the client log gives:


=[C]:-1 in (method) FindEntities (C) <-1--1>
scripts/simutil.lua:35 in () ? (Lua) <31-42>
   inst = 123790 - deerclops (valid:true)
   radius = nil
   fn = function - ../mods/charmod/modmain.lua:140
   musttags = table: 14921210
   canttags = table: 14921238
   mustoneoftags = nil
   x = 151.81788635254
   y = 0
   z = -332.45700073242


[00:01:32]: [string "scripts/simutil.lua"]:35: bad argument #3 to 'FindEntities' (number expected, got nil)
LUA ERROR stack traceback:
    =[C]:-1 in (method) FindEntities (C) <-1--1>
    scripts/simutil.lua:35 in () ? (Lua) <31-42>
    =(tail call):-1 in ()  (tail) <-1--1>
    scripts/components/combat.lua:206 in (method) TryRetarget (Lua) <199-222>
    scripts/components/combat.lua:196 in (field) fn (Lua) <195-197>
    scripts/scheduler.lua:177 in (method) OnTick (Lua) <155-207>
    scripts/scheduler.lua:371 in (global) RunScheduler (Lua) <369-377>
    scripts/update.lua:185 in () ? (Lua) <164-243>



and here is my code, which I essentially just copy-pasted from the deerclops.lua file 

local RETARGET_MUST_TAGS = { "_combat" }
local RETARGET_CANT_TAGS = { "prey", "smallcreature", "INLIMBO", "communer" }

local function DeerclopsRetarget(inst)
    local range = inst:GetPhysicsRadius(0) + 8
    return GLOBAL.FindEntity(
                return inst.components.combat:CanTarget(guy)
                    and (   guy.components.combat:TargetIs(inst) or
                            guy:IsNear(inst, range)

AddPrefabPostInit("deerclops", function(inst)
if GLOBAL.TheWorld.ismastersim then    
        inst.components.combat:SetRetargetFunction(1, DeerclopsRetarget)

Edited by headofmarimo
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