From 95c17a190cc08d8e356b17ed4279a788a3b49c39 Mon Sep 17 00:00:00 2001
From: Tony Garnock-Jones <tonygarnockjones@gmail.com>
Date: Mon, 20 Jun 2016 11:01:49 -0400
Subject: [PATCH] Avoid failure when currentLocation not yet initialised

---
 js/examples/location/index.js | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/js/examples/location/index.js b/js/examples/location/index.js
index 6427ca6..6117642 100644
--- a/js/examples/location/index.js
+++ b/js/examples/location/index.js
@@ -63,7 +63,9 @@ ground dataspace G {
       assert toBroker(wsurl, currentLocation) when (currentLocation);
 
       on message Syndicate.UI.globalEvent('#my_email', 'change', _) {
-        localStorage.my_email = currentLocation[1] = email_element.value.trim();
+        var v = email_element.value.trim();
+        if (currentLocation) currentLocation[1] = v;
+        localStorage.my_email = v;
       }
 
       on message Syndicate.UI.globalEvent('#group', 'change', _) {