Index: binaries/data/mods/public/maps/random/rmgen/library.js
===================================================================
--- binaries/data/mods/public/maps/random/rmgen/library.js
+++ binaries/data/mods/public/maps/random/rmgen/library.js
@@ -153,6 +153,9 @@
  */
 function createAreasInAreas(centeredPlacer, painter, constraints, amount, retryFactor, areas)
 {
+	if (!areas.length)
+		return [];
+
 	let placeFunc = function() {
 		centeredPlacer.setCenterPosition(pickRandom(pickRandom(areas).getPoints()));
 		return createArea(centeredPlacer, painter, constraints);
@@ -181,6 +184,9 @@
  */
 function createObjectGroupsByAreas(group, player, constraints, amount, retryFactor, areas, behaveDeprecated = false)
 {
+	if (!areas.length)
+		return [];
+
 	let placeFunc = function() {
 		group.setCenterPosition(pickRandom(pickRandom(areas).getPoints()));
 		return createObjectGroup(group, player, constraints);