From 0d8e87e09704588273bc94a740279b3e8af7474f Mon Sep 17 00:00:00 2001
From: Georgii Dolzhykov <thorn.mailbox@gmail.com>
Date: Wed, 19 Feb 2020 19:03:20 +0200
Subject: [PATCH] fix(typescript-estree): process.stdout can be undefined
 (#1619)

---
 packages/typescript-estree/src/parser.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/packages/typescript-estree/src/parser.ts b/packages/typescript-estree/src/parser.ts
index 6142efaf1af..b5e75d15559 100644
--- a/packages/typescript-estree/src/parser.ts
+++ b/packages/typescript-estree/src/parser.ts
@@ -261,7 +261,7 @@ function applyParserOptionsToExtra(options: TSESTreeOptions): void {
 
 function warnAboutTSVersion(): void {
   if (!isRunningSupportedTypeScriptVersion && !warnedAboutTSVersion) {
-    const isTTY = typeof process === undefined ? false : process.stdout.isTTY;
+    const isTTY = typeof process === undefined ? false : process.stdout?.isTTY;
     if (isTTY) {
       const border = '=============';
       const versionWarning = [