fixes

planetiler-core/src/main/java/com/onthegomap/planetiler/collection/LongMerger.java

@@ -88,7 +88,7 @@ public T next() {
     }
 
     private boolean lessThan(long ak, long bk, T a, T b) {
-      return ak < bk || (ak == bk && a != null && b != null && tieBreaker.compare(a, b) < 0);
+      return ak < bk || (ak == bk && lessThanCmp(a, b, tieBreaker));
     }
   }
 

planetiler-core/src/main/java/com/onthegomap/planetiler/util/CompareArchives.java

@@ -206,7 +206,7 @@ private void compareLayer(VectorTileProto.Tile.Layer layer1, VectorTileProto.Til
     compareList(name, "values list", layer1.getValuesList(), layer2.getValuesList());
     if (compareValues(name, "features count", layer1.getFeaturesCount(), layer2.getFeaturesCount())) {
       var ids1 = layer1.getFeaturesList().stream().map(f -> f.getId()).toList();
-      var ids2 = layer1.getFeaturesList().stream().map(f -> f.getId()).toList();
+      var ids2 = layer2.getFeaturesList().stream().map(f -> f.getId()).toList();
       if (compareValues(name, "feature ids", Set.of(ids1), Set.of(ids2)) &&
         compareValues(name, "feature order", ids1, ids2)) {
         for (int i = 0; i < layer1.getFeaturesCount() && i < layer2.getFeaturesCount(); i++) {

planetiler-core/src/test/java/com/onthegomap/planetiler/util/CompareArchivesTest.java

@@ -83,7 +83,7 @@ void testCompareArchives() throws IOException {
       ), Map.of(
         "layer1", Map.of(
           "values list unique values", 1L,
-          "feature id", 1L
+          "feature ids", 1L
         )
       )
     ), result);