From d54efe08382de35df765eb211386530a25f15e81 Mon Sep 17 00:00:00 2001
From: Cosimo Cecchi <cosimo@endlessm.com>
Date: Wed, 13 Aug 2014 15:13:20 -0700
Subject: [PATCH] runDialog: catch the case where no completion is available

Just return null, instead of failing with an exception later trying to
call substr() on null.

https://bugzilla.gnome.org/show_bug.cgi?id=735062
---
 js/ui/runDialog.js | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/js/ui/runDialog.js b/js/ui/runDialog.js
index 1d5e7a5dc..9c9ee6706 100644
--- a/js/ui/runDialog.js
+++ b/js/ui/runDialog.js
@@ -182,6 +182,10 @@ const RunDialog = new Lang.Class({
         let results = someResults.reduce(function(a, b) {
             return a.concat(b);
         }, []);
+
+        if (!results.length)
+            return null;
+
         let common = results.reduce(_getCommon, null);
         return common.substr(text.length);
     },