Debug indexingRescanOnOverflow test

Author: sungshik

src/main/java/engineering/swat/watch/impl/overflows/IndexingRescanner.java

@@ -54,6 +54,8 @@ public IndexingRescanner(Executor exec, Path path, WatchScope scope) {
         new Indexer(path, scope).walkFileTree(); // Make an initial scan to populate the index
     }
 
+    Set<BasicFileAttributes> attrsObjects = new HashSet<>();
+
     private class Indexer extends BaseFileVisitor {
         public Indexer(Path path, WatchScope scope) {
             super(path, scope);
@@ -69,6 +71,12 @@ public FileVisitResult preVisitDirectory(Path dir, BasicFileAttributes attrs) th
 
         @Override
         public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) throws IOException {
+
+            if (attrsObjects.contains(attrs)) {
+                System.out.println("DUPLICATE ATTRS OBJECT");
+            }
+            attrsObjects.add(attrs);
+
             index.put(file, attrs.lastModifiedTime());
             return FileVisitResult.CONTINUE;
         }
@@ -111,6 +119,17 @@ else if (lastModifiedTimeOld.compareTo(lastModifiedTimeNew) < 0) {
             }
         }
 
+        @Override
+        public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) throws IOException {
+
+            if (attrsObjects.contains(attrs)) {
+                System.out.println("DUPLICATE ATTRS OBJECT");
+            }
+            attrsObjects.add(attrs);
+
+            return super.visitFile(file, attrs);
+        }
+
         @Override
         public FileVisitResult postVisitDirectory(Path dir, IOException exc) throws IOException {
             // If the visitor is back at the root of the rescan, then the time