From c22cdb446ab0d452dec2e4a382483f5d5a86de6e Mon Sep 17 00:00:00 2001
From: Ryan Cavanaugh <RyanCavanaugh@users.noreply.github.com>
Date: Tue, 25 Feb 2020 11:32:32 -0800
Subject: [PATCH] Harden telemetryOnOpenFile (#36993)

---
 src/server/editorServices.ts | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/server/editorServices.ts b/src/server/editorServices.ts
index 45a13feda1e..eeb266e1a80 100644
--- a/src/server/editorServices.ts
+++ b/src/server/editorServices.ts
@@ -3117,8 +3117,9 @@ namespace ts.server {
                 return;
             }
 
-            const info: OpenFileInfo = { checkJs: !!project.getSourceFile(scriptInfo.path)!.checkJsDirective };
-            this.eventHandler({ eventName: OpenFileInfoTelemetryEvent, data: { info } });
+            const sourceFile = project.getSourceFile(scriptInfo.path);
+            const checkJs = !!sourceFile && !!sourceFile.checkJsDirective;
+            this.eventHandler({ eventName: OpenFileInfoTelemetryEvent, data: { info: { checkJs } } });
         }
 
         /**