From e891f238f7e4ab633f6db33300dae4188b2c1dbe Mon Sep 17 00:00:00 2001
From: Sebastiaan van der Tol <basvandertol@gmail.com>
Date: Fri, 23 Sep 2016 10:45:25 +0200
Subject: [PATCH] Fixed initilization of AMS.IDs and AMS.eqIDs

---
 unpacked/extensions/TeX/AMSmath.js | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/unpacked/extensions/TeX/AMSmath.js b/unpacked/extensions/TeX/AMSmath.js
index 40ae0d02d..0e86c6553 100644
--- a/unpacked/extensions/TeX/AMSmath.js
+++ b/unpacked/extensions/TeX/AMSmath.js
@@ -603,7 +603,9 @@ MathJax.Hub.Register.StartupHook("TeX Jax Ready",function () {
   TEX.prefilterHooks.Add(function (data) {
     AMS.display = data.display;
     AMS.number = AMS.startNumber;  // reset equation numbers (in case the equation restarted)
-    AMS.eqlabels = AMS.eqIDs = {}; AMS.badref = false;
+    AMS.eqlabels = {};
+    AMS.eqIDs = {}; 
+    AMS.badref = false;
     if (AMS.refUpdate) {AMS.number = data.script.MathJax.startNumber}
   });
   TEX.postfilterHooks.Add(function (data) {
@@ -637,7 +639,10 @@ MathJax.Hub.Register.StartupHook("TeX Jax Ready",function () {
   //
   TEX.resetEquationNumbers = function (n,keepLabels) {
     AMS.startNumber = (n || 0);
-    if (!keepLabels) {AMS.labels = AMS.IDs = {}}
+    if (!keepLabels) {
+      AMS.labels = {};
+      AMS.IDs = {};
+    }
   }
 
   /******************************************************************************/