From f92c24b1e091afae446ad847f02cc4595de807b3 Mon Sep 17 00:00:00 2001
From: Ron Buckton <rbuckton@microsoft.com>
Date: Tue, 23 Feb 2016 15:38:07 -0800
Subject: [PATCH 1/2] Removed unused liftNode function

---
 src/compiler/visitor.ts | 20 --------------------
 1 file changed, 20 deletions(-)

diff --git a/src/compiler/visitor.ts b/src/compiler/visitor.ts
index 5850c54e933..92b00b1270b 100644
--- a/src/compiler/visitor.ts
+++ b/src/compiler/visitor.ts
@@ -855,26 +855,6 @@ namespace ts {
         return createNodeArray(concatenate(statements, declarations), /*location*/ statements);
     }
 
-    /**
-     * Tries to lift a NodeArrayNode to a Node. This is primarily used to
-     * lift multiple statements into a single Block.
-     *
-     * @param node The visited Node.
-     * @param options Options used to control lift behavior.
-     */
-    function liftNode(node: Node, lifter: (nodes: NodeArray<Node>) => Node): Node {
-        if (node === undefined) {
-            return undefined;
-        }
-        else if (isNodeArrayNode(node)) {
-            const lift = lifter || extractSingleNode;
-            return lift(node.nodes);
-        }
-        else {
-            return node;
-        }
-    }
-
     /**
      * Lifts a NodeArray containing only Statement nodes to a block.
      *

From 4f03b31551d9688771db376ff2df5fabd28b7542 Mon Sep 17 00:00:00 2001
From: Ron Buckton <rbuckton@microsoft.com>
Date: Tue, 23 Feb 2016 15:40:12 -0800
Subject: [PATCH 2/2] Updated lift behavior

---
 src/compiler/visitor.ts | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/compiler/visitor.ts b/src/compiler/visitor.ts
index 92b00b1270b..ead9119e21a 100644
--- a/src/compiler/visitor.ts
+++ b/src/compiler/visitor.ts
@@ -502,8 +502,8 @@ namespace ts {
             return node;
         }
 
-        if (lift !== undefined && visited !== undefined && isNodeArrayNode(visited)) {
-            visited = lift((<NodeArrayNode<Node>>visited).nodes);
+        if (visited !== undefined && isNodeArrayNode(visited)) {
+            visited = (lift || extractSingleNode)((<NodeArrayNode<Node>>visited).nodes);
         }
 
         if (parenthesize !== undefined && visited !== undefined) {