--- a/src/jdk.compiler/share/classes/com/sun/tools/javac/tree/TreeScanner.java	Mon Sep 09 11:43:16 2019 -0400
+++ b/src/jdk.compiler/share/classes/com/sun/tools/javac/tree/TreeScanner.java	Wed Nov 27 09:00:01 2019 +0100
@@ -299,7 +299,12 @@
 
     public void visitTypeTest(JCInstanceOf tree) {
         scan(tree.expr);
-        scan(tree.clazz);
+        scan(tree.pattern);
+    }
+
+    public void visitBindingPattern(JCBindingPattern tree) {
+        if (tree.vartype != null)
+            scan(tree.vartype);
     }
 
     public void visitIndexed(JCArrayAccess tree) {