From 182f725612ec2b71009c02fc80cbc8d2cffbe7c3 Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <eelco.dolstra@logicblox.com>
Date: Mon, 12 Aug 2013 18:15:11 +0200
Subject: [PATCH] Don't pass an undefined input

---
 src/lib/Hydra/Helper/AddBuilds.pm | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/lib/Hydra/Helper/AddBuilds.pm b/src/lib/Hydra/Helper/AddBuilds.pm
index 734a97aa..6f51b98d 100644
--- a/src/lib/Hydra/Helper/AddBuilds.pm
+++ b/src/lib/Hydra/Helper/AddBuilds.pm
@@ -89,7 +89,7 @@ sub fetchInputBuild {
 
     if (!defined $prevBuild || !isValidPath(getMainOutput($prevBuild)->path)) {
         print STDERR "input `", $name, "': no previous build available\n";
-        return undef;
+        return ();
     }
 
     #print STDERR "input `", $name, "': using build ", $prevBuild->id, "\n";