--- a/langtools/src/share/classes/com/sun/tools/javac/tree/TreeMaker.java	Wed Jul 05 17:56:18 2017 +0200
+++ b/langtools/src/share/classes/com/sun/tools/javac/tree/TreeMaker.java	Thu Nov 24 13:36:20 2011 +0000
@@ -351,6 +351,14 @@
         return tree;
     }
 
+    public JCLambda Lambda(List<JCVariableDecl> params,
+                           JCTree body)
+    {
+        JCLambda tree = new JCLambda(params, body);
+        tree.pos = pos;
+        return tree;
+    }
+
     public JCParens Parens(JCExpression expr) {
         JCParens tree = new JCParens(expr);
         tree.pos = pos;