Index: ps/trunk/binaries/data/mods/public/gui/loadgame/SavegameWriter.js
===================================================================
--- ps/trunk/binaries/data/mods/public/gui/loadgame/SavegameWriter.js	(revision 27052)
+++ ps/trunk/binaries/data/mods/public/gui/loadgame/SavegameWriter.js	(revision 27053)
@@ -1,71 +1,71 @@
 /**
  * This class obtains the current simulation state to be saved along the savegame,
  * asks the user whether to overwrite a savegame and performs the saving.
  */
 class SavegameWriter
 {
 	constructor(savedGameData)
 	{
 		this.savedGameData = savedGameData;
 
 		let saveNew = () => {
 			this.saveGame();
 		};
 
 		this.confirmButton = Engine.GetGUIObjectByName("confirmButton");
 		this.confirmButton.caption = translate("Save");
 		this.confirmButton.onPress = saveNew;
 
 		this.saveGameDesc = Engine.GetGUIObjectByName("saveGameDesc");
 		this.saveGameDesc.hidden = false;
 		this.saveGameDesc.onPress = saveNew;
 		this.descriptionChanged = false;
 		this.saveGameDesc.onTextEdit = () => {
 			this.descriptionChanged = true;
 		};
 	}
 
 	onSelectionChange(gameID, metadata, label)
 	{
 		this.confirmButton.enabled = !!metadata || Engine.IsGameStarted();
-		if (!this.descriptionChanged && typeof metadata.description === "string")
+		if (!this.descriptionChanged && metadata && typeof metadata.description === "string")
 			this.saveGameDesc.caption = metadata.description;
 		this.confirmButton.onPress = () => {
 			this.saveGame(gameID, label);
 		};
 	}
 
 	saveGame(gameID, label)
 	{
 		let desc = this.saveGameDesc.caption;
 		let name = gameID || "savegame";
 
 		if (!gameID)
 		{
 			this.reallySaveGame(name, desc, true);
 			return;
 		}
 
 		messageBox(
 			500, 200,
 			sprintf(translate("\"%(label)s\""), { "label": label }) + "\n" +
 				translate("Saved game will be permanently overwritten, are you sure?"),
 			translate("OVERWRITE SAVE"),
 			[translate("No"), translate("Yes")],
 			[null, () => { this.reallySaveGame(name, desc, false); }]);
 	}
 
 	reallySaveGame(name, desc, nameIsPrefix)
 	{
 		let simulationState = Engine.GuiInterfaceCall("GetSimulationState");
 		this.savedGameData.timeElapsed = simulationState.timeElapsed;
 		this.savedGameData.states = simulationState.players.map(pState => pState.state);
 
 		if (nameIsPrefix)
 			Engine.SaveGamePrefix(name, desc, this.savedGameData);
 		else
 			Engine.SaveGame(name, desc, this.savedGameData);
 
 		Engine.PopGuiPage();
 	}
 }