src/share/classes/com/sun/tools/javac/tree/TreeScanner.java

@@ -287,10 +287,22 @@
 
     @Override
     public void visitTypeBoundKind(TypeBoundKind that) {
     }
 
+    @Override
+    public void visitFunctionType(JCFunctionType tree) {
+        scan(tree.returnType);
+        scan(tree.parameterTypes);
+    }
+    
+    @Override
+    public void visitLambda(JCLambda tree) {
+        scan(tree.parameters);
+        scan(tree.bodyOrExpr);
+    }
+
     public void visitModifiers(JCModifiers tree) {
         scan(tree.annotations);
     }
 
     public void visitAnnotation(JCAnnotation tree) {