diff -r 88502b1cf76f -r 7799a51dbe30 src/jdk.compiler/share/classes/com/sun/source/util/TreeScanner.java
--- a/src/jdk.compiler/share/classes/com/sun/source/util/TreeScanner.java	Mon Sep 09 11:43:16 2019 -0400
+++ b/src/jdk.compiler/share/classes/com/sun/source/util/TreeScanner.java	Wed Nov 27 09:00:01 2019 +0100
@@ -667,7 +667,11 @@
     @Override
     public R visitInstanceOf(InstanceOfTree node, P p) {
         R r = scan(node.getExpression(), p);
-        r = scanAndReduce(node.getType(), p, r);
+        if (node.getPattern() != null) {
+            r = scanAndReduce(node.getPattern(), p, r);
+        } else {
+            r = scanAndReduce(node.getType(), p, r);
+        }
         return r;
     }
 
@@ -677,6 +681,19 @@
      * @param node  {@inheritDoc}
      * @param p  {@inheritDoc}
      * @return the result of scanning
+     * @since 14
+     */
+    @Override
+    public R visitBindingPattern(BindingPatternTree node, P p) {
+        return scan(node.getType(), p);
+    }
+
+    /**
+     * {@inheritDoc} This implementation scans the children in left to right order.
+     *
+     * @param node  {@inheritDoc}
+     * @param p  {@inheritDoc}
+     * @return the result of scanning
      */
     @Override
     public R visitArrayAccess(ArrayAccessTree node, P p) {