From 0ee4e0b10dd964ec97ebd8434195e436f4021dd7 Mon Sep 17 00:00:00 2001
From: Ron Buckton <rbuckton@microsoft.com>
Date: Fri, 20 Nov 2015 10:13:01 -0800
Subject: [PATCH] Modified cloneNode to ignore own properties of clone.

---
 src/compiler/utilities.ts | 9 +--------
 1 file changed, 1 insertion(+), 8 deletions(-)

diff --git a/src/compiler/utilities.ts b/src/compiler/utilities.ts
index 040877394cc..28faf0c2fda 100644
--- a/src/compiler/utilities.ts
+++ b/src/compiler/utilities.ts
@@ -1597,7 +1597,7 @@ namespace ts {
             : <T>createSynthesizedNode(node.kind);
 
         for (const key in node) {
-            if (isExcludedPropertyForClone(key) || !node.hasOwnProperty(key)) {
+            if (clone.hasOwnProperty(key) || !node.hasOwnProperty(key)) {
                 continue;
             }
 
@@ -1615,13 +1615,6 @@ namespace ts {
         return clone;
     }
 
-    function isExcludedPropertyForClone(property: string) {
-        return property === "pos"
-            || property === "end"
-            || property === "flags"
-            || property === "parent";
-    }
-
     /**
      * Creates a deep clone of an EntityName, with new parent pointers.
      * @param node The EntityName to clone.