From a695dee6a03b2ef33bc88294253ac8c068bc1491 Mon Sep 17 00:00:00 2001
From: wumpz <t.warneke@gmx.net>
Date: Mon, 3 Apr 2017 15:34:56 +0200
Subject: [PATCH]

---
 src/main/java/difflib/DiffUtils.java | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/main/java/difflib/DiffUtils.java b/src/main/java/difflib/DiffUtils.java
index 84afda1..8e757b9 100644
--- a/src/main/java/difflib/DiffUtils.java
+++ b/src/main/java/difflib/DiffUtils.java
@@ -133,6 +133,9 @@ public final class DiffUtils {
     }
 
     private static List<String> compressLines(List<String> lines, String delimiter) {
+        if (lines.isEmpty()) {
+            return Collections.emptyList();
+        }
         return Collections.singletonList(lines.stream().collect(joining(delimiter)));
     }