From 34cee162ed287709e3313ed13e0a178fc67f3704 Mon Sep 17 00:00:00 2001
From: Benjamin Lichtman <belichtm@microsoft.com>
Date: Fri, 1 Jun 2018 15:21:22 -0700
Subject: [PATCH] Replace has with get and check undefined

---
 src/services/jsTyping.ts | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/services/jsTyping.ts b/src/services/jsTyping.ts
index ee757a0ca28..516c66688dc 100644
--- a/src/services/jsTyping.ts
+++ b/src/services/jsTyping.ts
@@ -160,7 +160,8 @@ namespace ts.JsTyping {
         }
         // Add the cached typing locations for inferred typings that are already installed
         packageNameToTypingLocation.forEach((typing, name) => {
-            if (inferredTypings.has(name) && inferredTypings.get(name) === undefined && typesRegistry.has(name) && isTypingUpToDate(typing, typesRegistry.get(name)!)) {
+            const registryEntry = typesRegistry.get(name);
+            if (inferredTypings.has(name) && inferredTypings.get(name) === undefined && registryEntry !== undefined && isTypingUpToDate(typing, typesRegistry.get(name)!)) {
                 inferredTypings.set(name, typing.typingLocation);
             }
         });