From 4dc8ac7500f31e34f5766c9039b9436b99222dcf Mon Sep 17 00:00:00 2001
From: Sheetal Nandi <shkamat@microsoft.com>
Date: Fri, 22 Feb 2019 10:53:31 -0800
Subject: [PATCH] Fix the crash found while compiling src/compiler

---
 src/compiler/utilities.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/compiler/utilities.ts b/src/compiler/utilities.ts
index 6dc428a1935..d3e855aae32 100644
--- a/src/compiler/utilities.ts
+++ b/src/compiler/utilities.ts
@@ -6780,7 +6780,7 @@ namespace ts {
     /* @internal */
     export function isDeclaration(node: Node): node is NamedDeclaration {
         if (node.kind === SyntaxKind.TypeParameter) {
-            return node.parent.kind !== SyntaxKind.JSDocTemplateTag || isInJSFile(node);
+            return (node.parent && node.parent.kind !== SyntaxKind.JSDocTemplateTag) || isInJSFile(node);
         }
 
         return isDeclarationKind(node.kind);