From d41ac8aa9a85203f413a52842975af4a4d4e09ec Mon Sep 17 00:00:00 2001
From: zhengbli <zhengbli@microsoft.com>
Date: Thu, 2 Jun 2016 11:12:38 -0700
Subject: [PATCH] Add null check and CR feedback

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

diff --git a/src/compiler/parser.ts b/src/compiler/parser.ts
index 13f16f3848a..e377f988d55 100644
--- a/src/compiler/parser.ts
+++ b/src/compiler/parser.ts
@@ -441,14 +441,14 @@ namespace ts {
     /* @internal */
     export function parseIsolatedJSDocComment(content: string, start?: number, length?: number) {
         const result = Parser.JSDocParser.parseIsolatedJSDocComment(content, start, length);
-        if (result.jsDocComment) {
+        if (result && result.jsDocComment) {
             // because the jsDocComment was parsed out of the source file, it might
             // not be covered by the fixupParentReferences.
             let parentNode: Node = result.jsDocComment;
             forEachChild(result.jsDocComment, visitNode);
 
             function visitNode(n: Node): void {
-                if (n.parent !== parentNode) {
+                if (n.parent === undefined) {
                     n.parent = parentNode;
 
                     const saveParent = parentNode;