From a1b502056221807c4e4b9c4a78281624d8e7ef5e Mon Sep 17 00:00:00 2001
From: Rob Vermaas <rob.vermaas@gmail.com>
Date: Tue, 18 Nov 2014 10:59:04 +0100
Subject: [PATCH] Make evaluation fail with proper error when a input of type
 build is not available.

---
 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 f4a16ab6..917c765f 100644
--- a/src/lib/Hydra/Helper/AddBuilds.pm
+++ b/src/lib/Hydra/Helper/AddBuilds.pm
@@ -95,7 +95,7 @@ sub fetchInputBuild {
             , where => \ attrsToSQL($attrs, "me.id") })->single;
     }
 
-    return () if !defined $prevBuild || !isValidPath(getMainOutput($prevBuild)->path);
+    die "Input $name: No builds available at $value" if !defined $prevBuild || !isValidPath(getMainOutput($prevBuild)->path);
 
     #print STDERR "input `", $name, "': using build ", $prevBuild->id, "\n";