From 6ad58b242e2fe4d8d0adb9009c6f0e7e59d56253 Mon Sep 17 00:00:00 2001
From: Wesley Wigham <wewigham@microsoft.com>
Date: Wed, 7 Nov 2018 15:46:13 -0800
Subject: [PATCH] Do not output summary if theres nothing to report

---
 src/compiler/watch.ts | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/compiler/watch.ts b/src/compiler/watch.ts
index 345991baef..24563c1b53 100644
--- a/src/compiler/watch.ts
+++ b/src/compiler/watch.ts
@@ -117,6 +117,7 @@ namespace ts {
     }
 
     export function getErrorSummaryText(errorCount: number, newLine: string) {
+        if (errorCount === 0) return "";
         const d = createCompilerDiagnostic(errorCount === 1 ? Diagnostics.Found_1_error : Diagnostics.Found_0_errors, errorCount);
         return `${newLine}${flattenDiagnosticMessageText(d.messageText, newLine)}${newLine}${newLine}`;
     }