From 21255aa1e8c8369b7257841cc0ac7f1458abd315 Mon Sep 17 00:00:00 2001
From: Nico Jansen <jansennico@gmail.com>
Date: Tue, 3 Apr 2018 07:25:14 +0200
Subject: [PATCH] fix(Progress reporter): don't prevent stryker from closing

---
 .../stryker/src/reporters/ProgressAppendOnlyReporter.ts     | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/packages/stryker/src/reporters/ProgressAppendOnlyReporter.ts b/packages/stryker/src/reporters/ProgressAppendOnlyReporter.ts
index 24f0897771..eb08302145 100644
--- a/packages/stryker/src/reporters/ProgressAppendOnlyReporter.ts
+++ b/packages/stryker/src/reporters/ProgressAppendOnlyReporter.ts
@@ -9,8 +9,10 @@ export default class ProgressAppendOnlyReporter extends ProgressKeeper {
 
   onAllMutantsMatchedWithTests(matchedMutants: ReadonlyArray<MatchedMutant>): void {
     super.onAllMutantsMatchedWithTests(matchedMutants);
-    this.timer = new Timer();
-    this.intervalReference = setInterval(() => this.render(), 10000);
+    if (matchedMutants.length) {
+      this.timer = new Timer();
+      this.intervalReference = setInterval(() => this.render(), 10000);
+    }
   }
 
   onAllMutantsTested(): void {