From 2a3800965b13c036789a131477a60fc8fd74d622 Mon Sep 17 00:00:00 2001
From: DLehenbauer <DLehenbauer@users.noreply.github.com>
Date: Tue, 28 Feb 2017 07:31:01 -0800
Subject: [PATCH] Fix TypeError when JSDoc.tags is undefined (see #14362)

---
 src/compiler/utilities.ts | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/compiler/utilities.ts b/src/compiler/utilities.ts
index 66bf693d831..2ab2fc2fc23 100644
--- a/src/compiler/utilities.ts
+++ b/src/compiler/utilities.ts
@@ -1554,7 +1554,10 @@ namespace ts {
                     }
                 }
                 else {
-                    result.push(...filter((doc as JSDoc).tags, tag => tag.kind === kind));
+                    const tags = (doc as JSDoc).tags;
+                    if (tags) {
+                        result.push(...filter(tags, tag => tag.kind === kind));
+                    }
                 }
             }
             return result;