Ticket #18624: 18624.patch

src/org/openstreetmap/josm/actions/downloadtasks/DownloadReferrersTask.java

@@ -148 +148 @@
         Collection<Way> ways = ds.getWays();
 
         if (!ways.isEmpty()) {
-            // Ensure each node is only listed once
-            Set<Node> nodes = ways.stream().flatMap(w -> w.getNodes().stream()).collect(Collectors.toSet());
+            // Ensure each incomplete node is only listed once
+            Set<Node> nodes = ways.stream().flatMap(w -> w.getNodes().stream().filter(OsmPrimitive::isIncomplete)).collect(Collectors.toSet());
             // Don't retrieve any nodes we've already grabbed
             nodes.removeAll(targetLayer.data.getNodes());
             if (!nodes.isEmpty()) {