[traffic] Avoid an exception in ready_to_cross

gama-platform · Sep 27, 2021 · c1326ba · c1326ba
1 parent 7b7d898
commit c1326ba
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/simtools.gaml.extensions.traffic/src/simtools/gaml/extensions/traffic/DrivingSkill.java b/simtools.gaml.extensions.traffic/src/simtools/gaml/extensions/traffic/DrivingSkill.java
@@ -1170,6 +1170,9 @@ public static Boolean readyToCross(final IScope scope,
 					for (OrderedBidiMap<IAgent, Double> vehicleOrderMap : RoadSkill.getVehicleOrdering(otherInRoad)) {
 						// The vehicle closest to the end of the road
 						OrderedBidiMap<Double, IAgent> distMap = vehicleOrderMap.inverseBidiMap();
+						if (distMap.isEmpty()) {
+							continue;
+						}
 						double otherDistToNode = distMap.lastKey();
 						IAgent otherVehicle = distMap.get(otherDistToNode);
 						if (otherVehicle == null || otherVehicle.dead()) {