From ce31449b2d4b5af9f3462c4129414b4dc81daecc Mon Sep 17 00:00:00 2001
From: Jordi Boggiano <j.boggiano@seld.be>
Date: Sat, 29 Sep 2012 03:26:08 +0200
Subject: [PATCH] Fix calls to non existing method, fixes #1154

---
 src/Composer/Package/Locker.php | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/Composer/Package/Locker.php b/src/Composer/Package/Locker.php
index dd553c8a5..f4532230b 100644
--- a/src/Composer/Package/Locker.php
+++ b/src/Composer/Package/Locker.php
@@ -165,7 +165,9 @@ class Locker
             }
             if (!empty($info['source-reference'])) {
                 $package->setSourceReference($info['source-reference']);
-                $package->setDistReference($info['source-reference']);
+                if (is_callable($package, 'setDistReference')) {
+                    $package->setDistReference($info['source-reference']);
+                }
             }
 
             $packages->addPackage($package);