From da7cdcccfab896a78fa0c6673579c70e9a03a478 Mon Sep 17 00:00:00 2001
From: r888888888 <r888888888@gmail.com>
Date: Wed, 18 Oct 2017 14:45:37 -0700
Subject: [PATCH] handle js error in autocomplete

---
 app/assets/javascripts/autocomplete.js | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/app/assets/javascripts/autocomplete.js b/app/assets/javascripts/autocomplete.js
index 9778de473..1b11480b0 100644
--- a/app/assets/javascripts/autocomplete.js
+++ b/app/assets/javascripts/autocomplete.js
@@ -122,7 +122,12 @@
           return;
         }
 
-        var term = before_caret_text.match(/\S+/g).pop();
+        var term = before_caret_text.match(/\S+/g);
+        if (!term) {
+          return;
+        }
+
+        term = term.pop();
         var regexp = new RegExp("^(?:" + prefixes + ")(.*)$", "i");
         var match = term.match(regexp);
         if (match) {