From fa97b0b8d61ce05acd47a733044b07c9c4af1595 Mon Sep 17 00:00:00 2001
From: Eugene Yokota <eed3si9n@gmail.com>
Date: Sat, 23 May 2015 17:32:56 -0400
Subject: [PATCH] Adds null guard

---
 .../main/scala/sbt/ivyint/CachedResolutionResolveEngine.scala   | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/ivy/src/main/scala/sbt/ivyint/CachedResolutionResolveEngine.scala b/ivy/src/main/scala/sbt/ivyint/CachedResolutionResolveEngine.scala
index 0c09d9fc4..9f25d2172 100644
--- a/ivy/src/main/scala/sbt/ivyint/CachedResolutionResolveEngine.scala
+++ b/ivy/src/main/scala/sbt/ivyint/CachedResolutionResolveEngine.scala
@@ -148,7 +148,7 @@ private[sbt] class CachedResolutionResolveCache() {
       val dynamicGraphPath = dynamicGraphDirectory / todayStr / logicalClock.toString / pathOrg / pathName / pathRevision / "graphs" / "graph.json"
       def cleanDynamicGraph(): Unit =
         {
-          val list = (dynamicGraphDirectory listFiles DirectoryFilter).toList
+          val list = IO.listFiles(dynamicGraphDirectory, DirectoryFilter).toList
           list filterNot { d =>
             (d.getName == todayStr) || (d.getName == tomorrowStr) || (d.getName == yesterdayStr)
           } foreach { d =>