From 92cf32a49ac5c2ea7cfcdc949cf5bb3f9ec9c1f7 Mon Sep 17 00:00:00 2001
From: David Glasser <glasser@meteor.com>
Date: Wed, 6 Aug 2014 16:05:34 -0700
Subject: [PATCH] don't break running from checkout

---
 tools/main.js | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/tools/main.js b/tools/main.js
index 33b0f7d888..11e66ba8c9 100644
--- a/tools/main.js
+++ b/tools/main.js
@@ -781,7 +781,8 @@ Fiber(function () {
     // release.load (which will refresh the catalog because the release
     // presumably doesn't exist on the new server, and this is a slow
     // operation).
-    if (warehouse.releaseExistsInWarehouse(releaseName)) {
+    if (releaseName !== null &&
+        warehouse.releaseExistsInWarehouse(releaseName)) {
       var manifest = warehouse.ensureReleaseExistsAndReturnManifest(
         releaseName);
       oldSpringboard(manifest.tools);