From 11837f0109161dacd56704f1a06e5eb754bd97be Mon Sep 17 00:00:00 2001
From: Klaus Meinhardt <klaus.meinhardt1@gmail.com>
Date: Sat, 30 Jun 2018 22:33:44 +0200
Subject: [PATCH] revert unnecessary change

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

diff --git a/src/compiler/factory.ts b/src/compiler/factory.ts
index 7c98dba8494..ed04a6dc6f0 100644
--- a/src/compiler/factory.ts
+++ b/src/compiler/factory.ts
@@ -4340,7 +4340,7 @@ namespace ts {
         }
     }
 
-    function getLeftmostExpression(node: Expression, stopAtCallExpressions: boolean | undefined) {
+    function getLeftmostExpression(node: Expression, stopAtCallExpressions: boolean) {
         while (true) {
             switch (node.kind) {
                 case SyntaxKind.PostfixUnaryExpression: