guard custom price eval and slider value

💘 Generated with Crush

Assisted-by: GPT-5.2-Codex via Crush <crush@charm.land>

TradeSkillMaster/Core/Prices.lua

@@ -514,8 +514,15 @@ function TSMAPI:ParseCustomPrice(priceString, badPriceSource)
 		return nil, err
 	end
 
-	customPriceCache[priceString] = func
-	return func
+	local function safeFunc(itemString)
+		local success, value = pcall(func, itemString)
+		if success then
+			return value
+		end
+	end
+
+	customPriceCache[priceString] = safeFunc
+	return safeFunc
 end
 
 function TSMAPI:GetCustomPriceSourceValue(itemString, key)

TradeSkillMaster/GUI/TSMWidgets/TSMSlider.lua

@@ -158,6 +158,13 @@ local methods = {
 	end,
 
 	["SetValue"] = function(self, value)
+		if value == nil then
+			value = self.min or 0
+		end
+		value = tonumber(value)
+		if not value then
+			return
+		end
 		self.slider.setup = true
 		self.slider:SetValue(value)
 		self.value = value