From 3c4786d5427dd9c894a424c14b527f47862f0a5d Mon Sep 17 00:00:00 2001
From: Zhengbo Li <zhengbli@microsoft.com>
Date: Wed, 21 Sep 2016 16:52:02 -0700
Subject: [PATCH] fix 9610 (#11042)

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

diff --git a/src/server/scriptVersionCache.ts b/src/server/scriptVersionCache.ts
index 10e4309f081..1508187c13e 100644
--- a/src/server/scriptVersionCache.ts
+++ b/src/server/scriptVersionCache.ts
@@ -526,7 +526,7 @@ namespace ts.server {
             }
             if (this.root.charCount() === 0) {
                 // TODO: assert deleteLength === 0
-                if (newText) {
+                if (newText !== undefined) {
                     this.load(LineIndex.linesFromText(newText).lines);
                     return this;
                 }