From 6b7c1ad6cf1b1f48dbc119f87808ea9879a0bb64 Mon Sep 17 00:00:00 2001
From: jdalton <john.david.dalton@gmail.com>
Date: Thu, 25 Jun 2015 14:34:04 -0700
Subject: [PATCH] Ensure `_.indexOf` and `_.lastIndexOf` return `-1` when
 performing a binary search for `undefined` and it's not found. [closes #1303]

---
 lodash.src.js | 7 +++----
 test/test.js  | 3 ++-
 2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/lodash.src.js b/lodash.src.js
index 2692c43ec..5d8510da8 100644
--- a/lodash.src.js
+++ b/lodash.src.js
@@ -5089,10 +5089,9 @@
       if (typeof fromIndex == 'number') {
         fromIndex = fromIndex < 0 ? nativeMax(length + fromIndex, 0) : fromIndex;
       } else if (fromIndex) {
-        var index = binaryIndex(array, value),
-            other = array[index];
-
-        if (value === value ? (value === other) : (other !== other)) {
+        var index = binaryIndex(array, value);
+        if (index < length &&
+            (value === value ? (value === array[index]) : (array[index] !== array[index]))) {
           return index;
         }
         return -1;
diff --git a/test/test.js b/test/test.js
index f91e09f77..5d9f223f6 100644
--- a/test/test.js
+++ b/test/test.js
@@ -9354,12 +9354,13 @@
       deepEqual(actual, expected);
     });
 
-    test('`_.' + methodName + '` should return `-1` for an unmatched value', 4, function() {
+    test('`_.' + methodName + '` should return `-1` for an unmatched value', 5, function() {
       var array = [1, 2, 3],
           empty = [];
 
       strictEqual(func(array, 4), -1);
       strictEqual(func(array, 4, true), -1);
+      strictEqual(func(array, undefined, true), -1);
 
       strictEqual(func(empty, undefined), -1);
       strictEqual(func(empty, undefined, true), -1);