From 5a23c883e27feea0004fb8b256ee0074d2c84b9d Mon Sep 17 00:00:00 2001
From: Jermolene <jeremy@osmosoft.com>
Date: Mon, 14 Jul 2014 14:52:00 +0100
Subject: [PATCH] More defensive checks
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We’ve had a few bugs with the symptom of ‘text’ being undefined.
---
 core/modules/widgets/widget.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/core/modules/widgets/widget.js b/core/modules/widgets/widget.js
index 1069c6025..e7e92449d 100755
--- a/core/modules/widgets/widget.js
+++ b/core/modules/widgets/widget.js
@@ -136,7 +136,7 @@ Widget.prototype.substituteVariableParameters = function(text,formalParams,actua
 
 Widget.prototype.substituteVariableReferences = function(text) {
 	var self = this;
-	return text.replace(/\$\(([^\)\$]+)\)\$/g,function(match,p1,offset,string) {
+	return (text || "").replace(/\$\(([^\)\$]+)\)\$/g,function(match,p1,offset,string) {
 		return self.getVariable(p1,{defaultValue: ""});
 	});
 };