--- old/src/jdk.compiler/share/classes/com/sun/source/util/TreePathScanner.java	2020-07-27 09:20:33.688000000 -0700
+++ new/src/jdk.compiler/share/classes/com/sun/source/util/TreePathScanner.java	2020-07-27 09:20:32.804000000 -0700
@@ -43,6 +43,10 @@
  * @since 1.6
  */
 public class TreePathScanner<R, P> extends TreeScanner<R, P> {
+    /**
+     * Constructs a {@code TreePathScanner}.
+     */
+    public TreePathScanner() {}
 
     /**
      * Scans a tree from a position identified by a TreePath.