-- The function that gives the error (line that gives error is commented)
function GameMode:HandleCollision(collider, collided)
	print("Testing bullet..")
	local collider_1, collider_2
	if collided.isBullet == true then
		collider_1 = collided
		collider_2 = collider
	end
	if collider.isBullet == true then
		collider_1 = collider
		collider_2 = collided
	end
	if not collider_1 then
		print("there is no bullet, returning")
		return
	end
	if collider_1.owningEntity.isBot == true and collider_2:IsRealHero() == true then
		print("collider_1 owning entity is a bot and collider_2 is a hero")
		collider_1:SuperhotDelete(collider_1)
		collider_2:SuperhotDelete(collider_2) -- !!! This is the line that gives the error
	end
	if collider_1.owningEntity:IsRealHero() == true and collider_2.owningEntity.isBot == true then
		print("collider_1 owning entity is a hero and collider_2 is a bot")
		collider_1:SuperhotDelete(collider_1)
		collider_2:SuperhotDelete(collider_2)
	end
	return false
end

-- Adding the function to the collider_2 in question
hero.SuperHotDelete = function(hero)
			hero:ForceKill(false)
			hero:RespawnUnit()
			hero.item:RemoveSelf()
			GameMode:EndLevel(GameMode.CurrentLevel)
			GameMode:StartLevelForPlayer(GameMode.CurrentLevel, hero, true)
		end