From a89f908a160c66807a69699a33c078f9390bb32a Mon Sep 17 00:00:00 2001
From: gorhill <rhill@raymondhill.net>
Date: Thu, 4 Feb 2016 08:21:59 -0500
Subject: [PATCH] this fixes #1341

---
 src/js/document-blocked.js | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/src/js/document-blocked.js b/src/js/document-blocked.js
index c64954ade..56fe62ada 100644
--- a/src/js/document-blocked.js
+++ b/src/js/document-blocked.js
@@ -192,6 +192,14 @@ uDom.nodeFromId('why').textContent = details.fs;
         return li;
     };
 
+    var safeDecodeURIComponent = function(s) {
+        try {
+            s = decodeURIComponent(s);
+        } catch (ex) {
+        }
+        return s;
+    };
+
     var renderParams = function(parentNode, rawURL) {
         var a = document.createElement('a');
         a.href = rawURL;
@@ -214,8 +222,8 @@ uDom.nodeFromId('why').textContent = details.fs;
             if ( pos === -1 ) {
                 pos = param.length;
             }
-            name = decodeURIComponent(param.slice(0, pos));
-            value = decodeURIComponent(param.slice(pos + 1));
+            name = safeDecodeURIComponent(param.slice(0, pos));
+            value = safeDecodeURIComponent(param.slice(pos + 1));
             li = liFromParam(name, value);
             if ( reURL.test(value) ) {
                 ul = document.createElement('ul');