From 78ed7a0839c70f248d898e009ddb919c06a6bd00 Mon Sep 17 00:00:00 2001
From: "raymond.lam" <ray@lam-ray.com>
Date: Wed, 4 Jan 2017 18:23:52 -0500
Subject: [PATCH] prevent value from being returned by Context.prototype.lookup
 if lookupHit is false

---
 mustache.js                       | 16 +++++++++-------
 test/_files/dot_notation.mustache |  1 +
 test/_files/dot_notation.txt      |  1 +
 3 files changed, 11 insertions(+), 7 deletions(-)

diff --git a/mustache.js b/mustache.js
index 413b6f2..56d6d6f 100644
--- a/mustache.js
+++ b/mustache.js
@@ -377,11 +377,11 @@
     if (cache.hasOwnProperty(name)) {
       value = cache[name];
     } else {
-      var context = this, names, index, lookupHit = false;
+      var context = this, intermediateValue, names, index, lookupHit = false;
 
       while (context) {
         if (name.indexOf('.') > 0) {
-          value = context.view;
+          intermediateValue = context.view;
           names = name.split('.');
           index = 0;
 
@@ -396,19 +396,21 @@
            * This is specially necessary for when the value has been set to
            * `undefined` and we want to avoid looking up parent contexts.
            **/
-          while (value != null && index < names.length) {
+          while (intermediateValue != null && index < names.length) {
             if (index === names.length - 1)
-              lookupHit = hasProperty(value, names[index]);
+              lookupHit = hasProperty(intermediateValue, names[index]);
 
-            value = value[names[index++]];
+            intermediateValue = intermediateValue[names[index++]];
           }
         } else {
-          value = context.view[name];
+          intermediateValue = context.view[name];
           lookupHit = hasProperty(context.view, name);
         }
 
-        if (lookupHit)
+        if (lookupHit) {
+          value = intermediateValue;
           break;
+        }
 
         context = context.parent;
       }
diff --git a/test/_files/dot_notation.mustache b/test/_files/dot_notation.mustache
index f89d70b..2640514 100644
--- a/test/_files/dot_notation.mustache
+++ b/test/_files/dot_notation.mustache
@@ -7,3 +7,4 @@
 <h2>Test truthy false values:</h2>
 <p>Zero: {{truthy.zero}}</p>
 <p>False: {{truthy.notTrue}}</p>
+<p>length of string should not be rendered: {{price.currency.name.length}}</p>
diff --git a/test/_files/dot_notation.txt b/test/_files/dot_notation.txt
index 08afa05..eeb346d 100644
--- a/test/_files/dot_notation.txt
+++ b/test/_files/dot_notation.txt
@@ -7,3 +7,4 @@
 <h2>Test truthy false values:</h2>
 <p>Zero: 0</p>
 <p>False: false</p>
+<p>length of string should not be rendered: </p>