properly handle File.list() returning null

1 files changed, 4 insertions, 0 deletions

diff --git a/src/main/org/apache/tools/ant/taskdefs/optional/jlink/jlink.java b/src/main/org/apache/tools/ant/taskdefs/optional/jlink/jlink.java
index 480c4cab0..e9cdb103a 100644
--- a/src/main/org/apache/tools/ant/taskdefs/optional/jlink/jlink.java
+++ b/src/main/org/apache/tools/ant/taskdefs/optional/jlink/jlink.java
@@ -255,6 +255,10 @@ public class jlink {
      */
     private void addDirContents(ZipOutputStream output, File dir, String prefix,
                                 boolean compress) throws IOException {
+        String[] names = dir.list();
+        if (names == null || names.length == 0) {
+            return;
+        }
         for (String name : dir.list()) {
             File file = new File(dir, name);