From 06f00a7dc51b9a268b875599d7516b7d61e4ccf6 Mon Sep 17 00:00:00 2001
From: plehegar <plh@w3.org>
Date: Fri, 14 Sep 2018 16:02:34 -0400
Subject: [PATCH] string.match(regexp) returns null if no match

---
 lib/validator.js | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/lib/validator.js b/lib/validator.js
index 8b78c2feb..be9d1cb82 100644
--- a/lib/validator.js
+++ b/lib/validator.js
@@ -329,10 +329,12 @@ Specberus.prototype.getFeedbackDueDate = function() {
       ;
       dates= [];
 
-      for (var i = 0; i < candidates.length; i++) {
+      if (candidates !== null) {
+        for (var i = 0; i < candidates.length; i++) {
           var d = this.stringToDate(candidates[i]);
           if (d >= lowBound && d < highBound)
               dates.push(d);
+        }
       }
   }
   return dates;