Ticket #3277: t3277_fix_unusable_tradecarts_v2.patch

binaries/data/mods/public/simulation/components/GuiInterface.js

@@ -1686 +1686 @@
 GuiInterface.prototype.GetTradingDetails = function(player, data)
 {
     var cmpEntityTrader = Engine.QueryInterface(data.trader, IID_Trader);
     if (!cmpEntityTrader || !cmpEntityTrader.CanTrade(data.target))
         return null;
+    
+    // Check if first market was destroyed, see #3277 
+    if (!Engine.QueryInterface(SYSTEM_ENTITY, IID_TemplateManager).GetCurrentTemplateName(cmpEntityTrader.GetFirstMarket()))
+        cmpEntityTrader.StopTrading(); 
+    
     var firstMarket = cmpEntityTrader.GetFirstMarket();
     var secondMarket = cmpEntityTrader.GetSecondMarket();
     var result = null;
     if (data.target === firstMarket)
     {